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Kai Huang
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83e1bdc94f |
x86/virt/tdx: Make TDX host depend on X86_MCE
A build failure was reported that when INTEL_TDX_HOST is enabled but
X86_MCE is not, the tdx_dump_mce_info() function fails to link:
ld: vmlinux.o: in function `tdx_dump_mce_info':
...: undefined reference to `mce_is_memory_error'
...: undefined reference to `mce_usable_address'
The reason is in such configuration, despite there's no caller of
tdx_dump_mce_info() it is still built and there's no implementation for
the two "mce_*()" functions.
Make INTEL_TDX_HOST depend on X86_MCE to fix.
It makes sense to enable MCE support for the TDX host anyway. Because
the only way that TDX has to report integrity errors is an MCE, and it
is not good to silently ignore such MCE. The TDX spec also suggests
the host VMM is expected to implement the MCE handler.
Note it also makes sense to make INTEL_TDX_HOST select X86_MCE but this
generates "recursive dependency detected!" error in the Kconfig.
Closes: https://lore.kernel.org/all/20231212214612.GHZXjUpBFa1IwVMTI7@fat_crate.local/T/
Fixes:
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Dave Hansen
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cb8eb06d50 |
x86/virt/tdx: Disable TDX host support when kexec is enabled
TDX host support currently lacks the ability to handle kexec. Disable TDX when kexec is enabled. Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-20-dave.hansen%40intel.com |
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Kai Huang
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4e1c7dddc7 |
Documentation/x86: Add documentation for TDX host support
Add documentation for TDX host kernel support. There is already one file Documentation/x86/tdx.rst containing documentation for TDX guest internals. Also reuse it for TDX host kernel support. Introduce a new level menu "TDX Guest Support" and move existing materials under it, and add a new menu for TDX host kernel support. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-19-dave.hansen%40intel.com |
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Kai Huang
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70060463cb |
x86/mce: Differentiate real hardware #MCs from TDX erratum ones
The first few generations of TDX hardware have an erratum. Triggering
it in Linux requires some kind of kernel bug involving relatively exotic
memory writes to TDX private memory and will manifest via
spurious-looking machine checks when reading the affected memory.
Make an effort to detect these TDX-induced machine checks and spit out
a new blurb to dmesg so folks do not think their hardware is failing.
== Background ==
Virtually all kernel memory accesses operations happen in full
cachelines. In practice, writing a "byte" of memory usually reads a 64
byte cacheline of memory, modifies it, then writes the whole line back.
Those operations do not trigger this problem.
This problem is triggered by "partial" writes where a write transaction
of less than cacheline lands at the memory controller. The CPU does
these via non-temporal write instructions (like MOVNTI), or through
UC/WC memory mappings. The issue can also be triggered away from the
CPU by devices doing partial writes via DMA.
== Problem ==
A partial write to a TDX private memory cacheline will silently "poison"
the line. Subsequent reads will consume the poison and generate a
machine check. According to the TDX hardware spec, neither of these
things should have happened.
To add insult to injury, the Linux machine code will present these as a
literal "Hardware error" when they were, in fact, a software-triggered
issue.
== Solution ==
In the end, this issue is hard to trigger. Rather than do something
rash (and incomplete) like unmap TDX private memory from the direct map,
improve the machine check handler.
Currently, the #MC handler doesn't distinguish whether the memory is
TDX private memory or not but just dump, for instance, below message:
[...] mce: [Hardware Error]: CPU 147: Machine Check Exception: f Bank 1: bd80000000100134
[...] mce: [Hardware Error]: RIP 10:<ffffffffadb69870> {__tlb_remove_page_size+0x10/0xa0}
...
[...] mce: [Hardware Error]: Run the above through 'mcelog --ascii'
[...] mce: [Hardware Error]: Machine check: Data load in unrecoverable area of kernel
[...] Kernel panic - not syncing: Fatal local machine check
Which says "Hardware Error" and "Data load in unrecoverable area of
kernel".
Ideally, it's better for the log to say "software bug around TDX private
memory" instead of "Hardware Error". But in reality the real hardware
memory error can happen, and sadly such software-triggered #MC cannot be
distinguished from the real hardware error. Also, the error message is
used by userspace tool 'mcelog' to parse, so changing the output may
break userspace.
So keep the "Hardware Error". The "Data load in unrecoverable area of
kernel" is also helpful, so keep it too.
Instead of modifying above error log, improve the error log by printing
additional TDX related message to make the log like:
...
[...] mce: [Hardware Error]: Machine check: Data load in unrecoverable area of kernel
[...] mce: [Hardware Error]: Machine Check: TDX private memory error. Possible kernel bug.
Adding this additional message requires determination of whether the
memory page is TDX private memory. There is no existing infrastructure
to do that. Add an interface to query the TDX module to fill this gap.
== Impact ==
This issue requires some kind of kernel bug to trigger.
TDX private memory should never be mapped UC/WC. A partial write
originating from these mappings would require *two* bugs, first mapping
the wrong page, then writing the wrong memory. It would also be
detectable using traditional memory corruption techniques like
DEBUG_PAGEALLOC.
MOVNTI (and friends) could cause this issue with something like a simple
buffer overrun or use-after-free on the direct map. It should also be
detectable with normal debug techniques.
The one place where this might get nasty would be if the CPU read data
then wrote back the same data. That would trigger this problem but
would not, for instance, set off mechanisms like slab redzoning because
it doesn't actually corrupt data.
With an IOMMU at least, the DMA exposure is similar to the UC/WC issue.
TDX private memory would first need to be incorrectly mapped into the
I/O space and then a later DMA to that mapping would actually cause the
poisoning event.
[ dhansen: changelog tweaks ]
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/all/20231208170740.53979-18-dave.hansen%40intel.com
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Kai Huang
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1e536e1068 |
x86/cpu: Detect TDX partial write machine check erratum
TDX memory has integrity and confidentiality protections. Violations of this integrity protection are supposed to only affect TDX operations and are never supposed to affect the host kernel itself. In other words, the host kernel should never, itself, see machine checks induced by the TDX integrity hardware. Alas, the first few generations of TDX hardware have an erratum. A partial write to a TDX private memory cacheline will silently "poison" the line. Subsequent reads will consume the poison and generate a machine check. According to the TDX hardware spec, neither of these things should have happened. Virtually all kernel memory accesses operations happen in full cachelines. In practice, writing a "byte" of memory usually reads a 64 byte cacheline of memory, modifies it, then writes the whole line back. Those operations do not trigger this problem. This problem is triggered by "partial" writes where a write transaction of less than cacheline lands at the memory controller. The CPU does these via non-temporal write instructions (like MOVNTI), or through UC/WC memory mappings. The issue can also be triggered away from the CPU by devices doing partial writes via DMA. With this erratum, there are additional things need to be done. To prepare for those changes, add a CPU bug bit to indicate this erratum. Note this bug reflects the hardware thus it is detected regardless of whether the kernel is built with TDX support or not. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-17-dave.hansen%40intel.com |
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Kai Huang
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f3f6aa6864 |
x86/virt/tdx: Handle TDX interaction with sleep and hibernation
TDX is incompatible with hibernation and some ACPI sleep states. Users must disable hibernation to use TDX. Users must also disable TDX if they want to use ACPI S3 sleep. This feels a bit wonky and asymmetric, but it avoids adding any new command-line parameters for now. It can be improved if users hate it too much. Long version: TDX cannot survive from S3 and deeper states. The hardware resets and disables TDX completely when platform goes to S3 and deeper. Both TDX guests and the TDX module get destroyed permanently. The kernel uses S3 to support suspend-to-ram, and S4 or deeper states to support hibernation. The kernel also maintains TDX states to track whether it has been initialized and its metadata resource, etc. After resuming from S3 or hibernation, these TDX states won't be correct anymore. Theoretically, the kernel can do more complicated things like resetting TDX internal states and TDX module metadata before going to S3 or deeper, and re-initialize TDX module after resuming, etc, but there is no way to save/restore TDX guests for now. Until TDX supports full save and restore of TDX guests, there is no big value to handle TDX module in suspend and hibernation alone. To make things simple, just choose to make TDX mutually exclusive with S3 and hibernation. Note the TDX module is initialized at runtime. To avoid having to deal with the fuss of determining TDX state at runtime, just choose TDX vs S3 and hibernation at kernel early boot. It's a bad user experience if the choice of TDX and S3/hibernation is done at runtime anyway, i.e., the user can experience being able to do S3/hibernation but later becoming unable to due to TDX being enabled. Disable TDX in kernel early boot when hibernation support is available. Currently there's no mechanism exposed by the hibernation code to allow other kernel code to disable hibernation once for all. Users that want TDX must disable hibernation, like using hibername=no on the command line. Disable ACPI S3 when TDX is enabled by the BIOS. For now the user needs to disable TDX in the BIOS to use ACPI S3. A new kernel command line can be added in the future if there's a need to let user disable TDX host via kernel command line. Alternatively, the kernel could disable TDX when ACPI S3 is supported and request the user to disable S3 to use TDX. But there's no existing kernel command line to do that, and BIOS doesn't always have an option to disable S3. [ dhansen: subject / changelog tweaks ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-16-dave.hansen%40intel.com |
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Kai Huang
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0b2bc38131 |
x86/virt/tdx: Initialize all TDMRs
After the global KeyID has been configured on all packages, initialize all TDMRs to make all TDX-usable memory regions that are passed to the TDX module become usable. This is the last step of initializing the TDX module. Initializing TDMRs can be time consuming on large memory systems as it involves initializing all metadata entries for all pages that can be used by TDX guests. Initializing different TDMRs can be parallelized. For now to keep it simple, just initialize all TDMRs one by one. It can be enhanced in the future. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-15-dave.hansen%40intel.com |
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Kai Huang
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e56d28df2f |
x86/virt/tdx: Configure global KeyID on all packages
After the list of TDMRs and the global KeyID are configured to the TDX module, the kernel needs to configure the key of the global KeyID on all packages using TDH.SYS.KEY.CONFIG. This SEAMCALL cannot run parallel on different cpus. Loop all online cpus and use smp_call_on_cpu() to call this SEAMCALL on the first cpu of each package. To keep things simple, this implementation takes no affirmative steps to online cpus to make sure there's at least one cpu for each package. The callers (aka. KVM) can ensure success by ensuring sufficient CPUs are online for this to succeed. Intel hardware doesn't guarantee cache coherency across different KeyIDs. The PAMTs are transitioning from being used by the kernel mapping (KeyId 0) to the TDX module's "global KeyID" mapping. This means that the kernel must flush any dirty KeyID-0 PAMT cachelines before the TDX module uses the global KeyID to access the PAMTs. Otherwise, if those dirty cachelines were written back, they would corrupt the TDX module's metadata. Aside: This corruption would be detected by the memory integrity hardware on the next read of the memory with the global KeyID. The result would likely be fatal to the system but would not impact TDX security. Following the TDX module specification, flush cache before configuring the global KeyID on all packages. Given the PAMT size can be large (~1/256th of system RAM), just use WBINVD on all CPUs to flush. If TDH.SYS.KEY.CONFIG fails, the TDX module may already have "converted" some memory for TDX module use. Convert the memory back so that it can be safely used by the kernel again. Note that this is slower than it should be because of the "partial write machine check" erratum which affects TDX-capable hardware. Also refactor and introduce a new helper: tdmr_do_pamt_func(). This takes a TDMR and runs a function on its PAMT. It looks a _bit_ odd to pass a function pointer around like this, but its use is pretty narrow and it does eliminate what would otherwise be some copying and pasting. [ dhansen: * munge changelog as usual * remove weird (*pamd_func)() syntax ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-14-dave.hansen%40intel.com |
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Kai Huang
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554ce1c36d |
x86/virt/tdx: Configure TDX module with the TDMRs and global KeyID
The TDX module uses a private KeyID as the "global KeyID" for mapping things like the PAMT and other TDX metadata. This KeyID has already been reserved when detecting TDX during the kernel early boot. Now that the "TD Memory Regions" (TDMRs) are fully built, pass them to the TDX module together with the global KeyID. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-13-dave.hansen%40intel.com |
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Kai Huang
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dde3b60d57 |
x86/virt/tdx: Designate reserved areas for all TDMRs
As the last step of constructing TDMRs, populate reserved areas for all TDMRs. Cover all memory holes and PAMTs with a TMDR reserved area. [ dhansen: trim down chagnelog ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-12-dave.hansen%40intel.com |
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Kai Huang
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ac3a220884 |
x86/virt/tdx: Allocate and set up PAMTs for TDMRs
The TDX module uses additional metadata to record things like which
guest "owns" a given page of memory. This metadata, referred as
Physical Address Metadata Table (PAMT), essentially serves as the
'struct page' for the TDX module. PAMTs are not reserved by hardware
up front. They must be allocated by the kernel and then given to the
TDX module during module initialization.
TDX supports 3 page sizes: 4K, 2M, and 1G. Each "TD Memory Region"
(TDMR) has 3 PAMTs to track the 3 supported page sizes. Each PAMT must
be a physically contiguous area from a Convertible Memory Region (CMR).
However, the PAMTs which track pages in one TDMR do not need to reside
within that TDMR but can be anywhere in CMRs. If one PAMT overlaps with
any TDMR, the overlapping part must be reported as a reserved area in
that particular TDMR.
Use alloc_contig_pages() since PAMT must be a physically contiguous area
and it may be potentially large (~1/256th of the size of the given TDMR).
The downside is alloc_contig_pages() may fail at runtime. One (bad)
mitigation is to launch a TDX guest early during system boot to get
those PAMTs allocated at early time, but the only way to fix is to add a
boot option to allocate or reserve PAMTs during kernel boot.
It is imperfect but will be improved on later.
TDX only supports a limited number of reserved areas per TDMR to cover
both PAMTs and memory holes within the given TDMR. If many PAMTs are
allocated within a single TDMR, the reserved areas may not be sufficient
to cover all of them.
Adopt the following policies when allocating PAMTs for a given TDMR:
- Allocate three PAMTs of the TDMR in one contiguous chunk to minimize
the total number of reserved areas consumed for PAMTs.
- Try to first allocate PAMT from the local node of the TDMR for better
NUMA locality.
Also dump out how many pages are allocated for PAMTs when the TDX module
is initialized successfully. This helps answer the eternal "where did
all my memory go?" questions.
[ dhansen: merge in error handling cleanup ]
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Link: https://lore.kernel.org/all/20231208170740.53979-11-dave.hansen%40intel.com
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Kai Huang
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f3338ac159 |
x86/virt/tdx: Fill out TDMRs to cover all TDX memory regions
Start to transit out the "multi-steps" to construct a list of "TD Memory Regions" (TDMRs) to cover all TDX-usable memory regions. The kernel configures TDX-usable memory regions by passing a list of TDMRs "TD Memory Regions" (TDMRs) to the TDX module. Each TDMR contains the information of the base/size of a memory region, the base/size of the associated Physical Address Metadata Table (PAMT) and a list of reserved areas in the region. Do the first step to fill out a number of TDMRs to cover all TDX memory regions. To keep it simple, always try to use one TDMR for each memory region. As the first step only set up the base/size for each TDMR. Each TDMR must be 1G aligned and the size must be in 1G granularity. This implies that one TDMR could cover multiple memory regions. If a memory region spans the 1GB boundary and the former part is already covered by the previous TDMR, just use a new TDMR for the remaining part. TDX only supports a limited number of TDMRs. Disable TDX if all TDMRs are consumed but there is more memory region to cover. There are fancier things that could be done like trying to merge adjacent TDMRs. This would allow more pathological memory layouts to be supported. But, current systems are not even close to exhausting the existing TDMR resources in practice. For now, keep it simple. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Yuan Yao <yuan.yao@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-10-dave.hansen%40intel.com |
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Kai Huang
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5173d3c5d0 |
x86/virt/tdx: Add placeholder to construct TDMRs to cover all TDX memory regions
After the kernel selects all TDX-usable memory regions, the kernel needs
to pass those regions to the TDX module via data structure "TD Memory
Region" (TDMR).
Add a placeholder to construct a list of TDMRs (in multiple steps) to
cover all TDX-usable memory regions.
=== Long Version ===
TDX provides increased levels of memory confidentiality and integrity.
This requires special hardware support for features like memory
encryption and storage of memory integrity checksums. Not all memory
satisfies these requirements.
As a result, TDX introduced the concept of a "Convertible Memory Region"
(CMR). During boot, the firmware builds a list of all of the memory
ranges which can provide the TDX security guarantees. The list of these
ranges is available to the kernel by querying the TDX module.
The TDX architecture needs additional metadata to record things like
which TD guest "owns" a given page of memory. This metadata essentially
serves as the 'struct page' for the TDX module. The space for this
metadata is not reserved by the hardware up front and must be allocated
by the kernel and given to the TDX module.
Since this metadata consumes space, the VMM can choose whether or not to
allocate it for a given area of convertible memory. If it chooses not
to, the memory cannot receive TDX protections and can not be used by TDX
guests as private memory.
For every memory region that the VMM wants to use as TDX memory, it sets
up a "TD Memory Region" (TDMR). Each TDMR represents a physically
contiguous convertible range and must also have its own physically
contiguous metadata table, referred to as a Physical Address Metadata
Table (PAMT), to track status for each page in the TDMR range.
Unlike a CMR, each TDMR requires 1G granularity and alignment. To
support physical RAM areas that don't meet those strict requirements,
each TDMR permits a number of internal "reserved areas" which can be
placed over memory holes. If PAMT metadata is placed within a TDMR it
must be covered by one of these reserved areas.
Let's summarize the concepts:
CMR - Firmware-enumerated physical ranges that support TDX. CMRs are
4K aligned.
TDMR - Physical address range which is chosen by the kernel to support
TDX. 1G granularity and alignment required. Each TDMR has
reserved areas where TDX memory holes and overlapping PAMTs can
be represented.
PAMT - Physically contiguous TDX metadata. One table for each page size
per TDMR. Roughly 1/256th of TDMR in size. 256G TDMR = ~1G
PAMT.
As one step of initializing the TDX module, the kernel configures
TDX-usable memory regions by passing a list of TDMRs to the TDX module.
Constructing the list of TDMRs consists below steps:
1) Fill out TDMRs to cover all memory regions that the TDX module will
use for TD memory.
2) Allocate and set up PAMT for each TDMR.
3) Designate reserved areas for each TDMR.
Add a placeholder to construct TDMRs to do the above steps. To keep
things simple, just allocate enough space to hold maximum number of
TDMRs up front.
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Link: https://lore.kernel.org/all/20231208170740.53979-9-dave.hansen%40intel.com
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Kai Huang
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cf72bc4816 |
x86/virt/tdx: Get module global metadata for module initialization
The TDX module global metadata provides system-wide information about
the module.
TL;DR:
Use the TDH.SYS.RD SEAMCALL to tell if the module is good or not.
Long Version:
1) Only initialize TDX module with version 1.5 and later
TDX module 1.0 has some compatibility issues with the later versions of
module, as documented in the "Intel TDX module ABI incompatibilities
between TDX1.0 and TDX1.5" spec. Don't bother with module versions that
do not have a stable ABI.
2) Get the essential global metadata for module initialization
TDX reports a list of "Convertible Memory Region" (CMR) to tell the
kernel which memory is TDX compatible. The kernel needs to build a list
of memory regions (out of CMRs) as "TDX-usable" memory and pass them to
the TDX module. The kernel does this by constructing a list of "TD
Memory Regions" (TDMRs) to cover all these memory regions and passing
them to the TDX module.
Each TDMR is a TDX architectural data structure containing the memory
region that the TDMR covers, plus the information to track (within this
TDMR):
a) the "Physical Address Metadata Table" (PAMT) to track each TDX
memory page's status (such as which TDX guest "owns" a given page,
and
b) the "reserved areas" to tell memory holes that cannot be used as
TDX memory.
The kernel needs to get below metadata from the TDX module to build the
list of TDMRs:
a) the maximum number of supported TDMRs
b) the maximum number of supported reserved areas per TDMR and,
c) the PAMT entry size for each TDX-supported page size.
== Implementation ==
The TDX module has two modes of fetching the metadata: a one field at
a time, or all in one blob. Use the field at a time for now. It is
slower, but there just are not enough fields now to justify the
complexity of extra unpacking.
The err_free_tdxmem=>out_put_tdxmem goto looks wonky by itself. But
it is the first of a bunch of error handling that will get stuck at
its site.
[ dhansen: clean up changelog and add a struct to map between
the TDX module fields and 'struct tdx_tdmr_sysinfo' ]
Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/all/20231208170740.53979-8-dave.hansen%40intel.com
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Kai Huang
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abe8dbab8f |
x86/virt/tdx: Use all system memory when initializing TDX module as TDX memory
Start to transit out the "multi-steps" to initialize the TDX module. TDX provides increased levels of memory confidentiality and integrity. This requires special hardware support for features like memory encryption and storage of memory integrity checksums. Not all memory satisfies these requirements. As a result, TDX introduced the concept of a "Convertible Memory Region" (CMR). During boot, the firmware builds a list of all of the memory ranges which can provide the TDX security guarantees. The list of these ranges is available to the kernel by querying the TDX module. CMRs tell the kernel which memory is TDX compatible. The kernel needs to build a list of memory regions (out of CMRs) as "TDX-usable" memory and pass them to the TDX module. Once this is done, those "TDX-usable" memory regions are fixed during module's lifetime. To keep things simple, assume that all TDX-protected memory will come from the page allocator. Make sure all pages in the page allocator *are* TDX-usable memory. As TDX-usable memory is a fixed configuration, take a snapshot of the memory configuration from memblocks at the time of module initialization (memblocks are modified on memory hotplug). This snapshot is used to enable TDX support for *this* memory configuration only. Use a memory hotplug notifier to ensure that no other RAM can be added outside of this configuration. This approach requires all memblock memory regions at the time of module initialization to be TDX convertible memory to work, otherwise module initialization will fail in a later SEAMCALL when passing those regions to the module. This approach works when all boot-time "system RAM" is TDX convertible memory and no non-TDX-convertible memory is hot-added to the core-mm before module initialization. For instance, on the first generation of TDX machines, both CXL memory and NVDIMM are not TDX convertible memory. Using kmem driver to hot-add any CXL memory or NVDIMM to the core-mm before module initialization will result in failure to initialize the module. The SEAMCALL error code will be available in the dmesg to help user to understand the failure. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: "Huang, Ying" <ying.huang@intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-7-dave.hansen%40intel.com |
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|
Kai Huang
|
6162b310bc |
x86/virt/tdx: Add skeleton to enable TDX on demand
There are essentially two steps to get the TDX module ready: 1) Get each CPU ready to run TDX 2) Set up the shared TDX module data structures Introduce and export (to KVM) the infrastructure to do both of these pieces at runtime. == Per-CPU TDX Initialization == Track the initialization status of each CPU with a per-cpu variable. This avoids failures in the case of KVM module reloads and handles cases where CPUs come online later. Generally, the per-cpu SEAMCALLs happen first. But there's actually one global call that has to happen before _any_ others (TDH_SYS_INIT). It's analogous to the boot CPU having to do a bit of extra work just because it happens to be the first one. Track if _any_ CPU has done this call and then only actually do it during the first per-cpu init. == Shared TDX Initialization == Create the global state function (tdx_enable()) as a simple placeholder. The TODO list will be pared down as functionality is added. Use a state machine protected by mutex to make sure the work in tdx_enable() will only be done once. This avoids failures if the KVM module is reloaded. A CPU must be made ready to run TDX before it can participate in initializing the shared parts of the module. Any caller of tdx_enable() need to ensure that it can never run on a CPU which is not ready to run TDX. It needs to be wary of CPU hotplug, preemption and the VMX enabling state of any CPU on which it might run. == Why runtime instead of boot time? == The TDX module can be initialized only once in its lifetime. Instead of always initializing it at boot time, this implementation chooses an "on demand" approach to initialize TDX until there is a real need (e.g when requested by KVM). This approach has below pros: 1) It avoids consuming the memory that must be allocated by kernel and given to the TDX module as metadata (~1/256th of the TDX-usable memory), and also saves the CPU cycles of initializing the TDX module (and the metadata) when TDX is not used at all. 2) The TDX module design allows it to be updated while the system is running. The update procedure shares quite a few steps with this "on demand" initialization mechanism. The hope is that much of "on demand" mechanism can be shared with a future "update" mechanism. A boot-time TDX module implementation would not be able to share much code with the update mechanism. 3) Making SEAMCALL requires VMX to be enabled. Currently, only the KVM code mucks with VMX enabling. If the TDX module were to be initialized separately from KVM (like at boot), the boot code would need to be taught how to muck with VMX enabling and KVM would need to be taught how to cope with that. Making KVM itself responsible for TDX initialization lets the rest of the kernel stay blissfully unaware of VMX. [ dhansen: completely reorder/rewrite changelog ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Nikolay Borisov <nik.borisov@suse.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-6-dave.hansen%40intel.com |
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|
Kai Huang
|
df01f5ae07 |
x86/virt/tdx: Add SEAMCALL error printing for module initialization
The SEAMCALLs involved during the TDX module initialization are not expected to fail. In fact, they are not expected to return any non-zero code (except the "running out of entropy error", which can be handled internally already). Add yet another set of SEAMCALL wrappers, which treats all non-zero return code as error, to support printing SEAMCALL error upon failure for module initialization. Note the TDX module initialization doesn't use the _saved_ret() variant thus no wrapper is added for it. SEAMCALL assembly can also return kernel-defined error codes for three special cases: 1) TDX isn't enabled by the BIOS; 2) TDX module isn't loaded; 3) CPU isn't in VMX operation. Whether they can legally happen depends on the caller, so leave to the caller to print error message when desired. Also convert the SEAMCALL error codes to the kernel error codes in the new wrappers so that each SEAMCALL caller doesn't have to repeat the conversion. [ dhansen: Align the register dump with show_regs(). Zero-pad the contents, split on two lines and use consistent spacing. ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-5-dave.hansen%40intel.com |
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|
Kai Huang
|
1e66a7e275 |
x86/virt/tdx: Handle SEAMCALL no entropy error in common code
Some SEAMCALLs use the RDRAND hardware and can fail for the same reasons as RDRAND. Use the kernel RDRAND retry logic for them. There are three __seamcall*() variants. Do the SEAMCALL retry in common code and add a wrapper for each of them. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirll.shutemov@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-4-dave.hansen%40intel.com |
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Kai Huang
|
3115cabd93 |
x86/virt/tdx: Make INTEL_TDX_HOST depend on X86_X2APIC
TDX capable platforms are locked to X2APIC mode and cannot fall back to the legacy xAPIC mode when TDX is enabled by the BIOS. TDX host support requires x2APIC. Make INTEL_TDX_HOST depend on X86_X2APIC. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Link: https://lore.kernel.org/lkml/ba80b303-31bf-d44a-b05d-5c0f83038798@intel.com/ Link: https://lore.kernel.org/all/20231208170740.53979-3-dave.hansen%40intel.com |
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Kai Huang
|
d623704bb2 |
x86/virt/tdx: Define TDX supported page sizes as macros
TDX supports 4K, 2M and 1G page sizes. The corresponding values are defined by the TDX module spec and used as TDX module ABI. Currently, they are used in try_accept_one() when the TDX guest tries to accept a page. However currently try_accept_one() uses hard-coded magic values. Define TDX supported page sizes as macros and get rid of the hard-coded values in try_accept_one(). TDX host support will need to use them too. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/all/20231208170740.53979-2-dave.hansen%40intel.com |
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|
Kai Huang
|
765a0542fd |
x86/virt/tdx: Detect TDX during kernel boot
Intel Trust Domain Extensions (TDX) protects guest VMs from malicious host and certain physical attacks. A CPU-attested software module called 'the TDX module' runs inside a new isolated memory range as a trusted hypervisor to manage and run protected VMs. Pre-TDX Intel hardware has support for a memory encryption architecture called MKTME. The memory encryption hardware underpinning MKTME is also used for Intel TDX. TDX ends up "stealing" some of the physical address space from the MKTME architecture for crypto-protection to VMs. The BIOS is responsible for partitioning the "KeyID" space between legacy MKTME and TDX. The KeyIDs reserved for TDX are called 'TDX private KeyIDs' or 'TDX KeyIDs' for short. During machine boot, TDX microcode verifies that the BIOS programmed TDX private KeyIDs consistently and correctly programmed across all CPU packages. The MSRs are locked in this state after verification. This is why MSR_IA32_MKTME_KEYID_PARTITIONING gets used for TDX enumeration: it indicates not just that the hardware supports TDX, but that all the boot-time security checks passed. The TDX module is expected to be loaded by the BIOS when it enables TDX, but the kernel needs to properly initialize it before it can be used to create and run any TDX guests. The TDX module will be initialized by the KVM subsystem when KVM wants to use TDX. Detect platform TDX support by detecting TDX private KeyIDs. The TDX module itself requires one TDX KeyID as the 'TDX global KeyID' to protect its metadata. Each TDX guest also needs a TDX KeyID for its own protection. Just use the first TDX KeyID as the global KeyID and leave the rest for TDX guests. If no TDX KeyID is left for TDX guests, disable TDX as initializing the TDX module alone is useless. [ dhansen: add X86_FEATURE, replace helper function ] Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Link: https://lore.kernel.org/all/20231208170740.53979-1-dave.hansen%40intel.com |
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Linus Torvalds
|
33cc938e65 | Linux 6.7-rc4 v6.7-rc4 | ||
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Linus Torvalds
|
968f35f4ab |
five cifs/smb3 fixes
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Linus Torvalds
|
55abae438c |
firewire fixes for 6.7-rc4
This pull request includes a single patch to fix long-standing issue of memory leak at failure of device registration for fw_unit. We rarely encounter the issue, while it should be applied to stable releases, since it fixes inappropriate API usage. -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQQE66IEYNDXNBPeGKSsLtaWM8LwEwUCZWrgUQAKCRCsLtaWM8Lw Ew8iAQDWPv5JItuZneeRs6NisGxtwNxyxP+O3qmSG4LxXOVfzAEA+K7ubreLee2a lfZkWPeZnWtSIdN+eAm4JfKMhzDfrA4= =oODB -----END PGP SIGNATURE----- Merge tag 'firewire-fixes-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394 Pull firewire fix from Takashi Sakamoto: "A single patch to fix long-standing issue of memory leak at failure of device registration for fw_unit. We rarely encounter the issue, but it should be applied to stable releases, since it fixes inappropriate API usage" * tag 'firewire-fixes-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394: firewire: core: fix possible memory leak in create_units() |
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Linus Torvalds
|
1b8af6552c |
powerpc fixes for 6.7 #3
- Fix corruption of f0/vs0 during FP/Vector save, seen as userspace crashes
when using io-uring workers (in particular with MariaDB).
- Fix KVM_RUN potentially clobbering all host userspace FP/Vector registers.
Thanks to: Timothy Pearson, Jens Axboe, Nicholas Piggin.
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Merge tag 'powerpc-6.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
- Fix corruption of f0/vs0 during FP/Vector save, seen as userspace
crashes when using io-uring workers (in particular with MariaDB)
- Fix KVM_RUN potentially clobbering all host userspace FP/Vector
registers
Thanks to Timothy Pearson, Jens Axboe, and Nicholas Piggin.
* tag 'powerpc-6.7-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
KVM: PPC: Book3S HV: Fix KVM_RUN clobbering FP/VEC user registers
powerpc: Don't clobber f0/vs0 during fp|altivec register save
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Linus Torvalds
|
17b17be28d |
VFIO fixes for v6.7-rc4
- Fix the lifecycle of a mutex in the pds variant driver such that
a reset prior to opening the device won't find it uninitialized.
Implement the release path to symmetrically destroy the mutex.
Also switch a different lock from spinlock to mutex as the code
path has the potential to sleep and doesn't need the spinlock
context otherwise. (Brett Creeley)
- Fix an issue detected via randconfig where KVM tries to symbol_get
an undeclared function. The symbol is temporarily declared
unconditionally here, which resolves the problem and avoids churn
relative to a series pending for the next merge window which
resolves some of this symbol ugliness, but also fixes Kconfig
dependencies. (Sean Christopherson)
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Merge tag 'vfio-v6.7-rc4' of https://github.com/awilliam/linux-vfio
Pull vfio fixes from Alex Williamson:
- Fix the lifecycle of a mutex in the pds variant driver such that a
reset prior to opening the device won't find it uninitialized.
Implement the release path to symmetrically destroy the mutex. Also
switch a different lock from spinlock to mutex as the code path has
the potential to sleep and doesn't need the spinlock context
otherwise (Brett Creeley)
- Fix an issue detected via randconfig where KVM tries to symbol_get an
undeclared function. The symbol is temporarily declared
unconditionally here, which resolves the problem and avoids churn
relative to a series pending for the next merge window which resolves
some of this symbol ugliness, but also fixes Kconfig dependencies
(Sean Christopherson)
* tag 'vfio-v6.7-rc4' of https://github.com/awilliam/linux-vfio:
vfio: Drop vfio_file_iommu_group() stub to fudge around a KVM wart
vfio/pds: Fix possible sleep while in atomic context
vfio/pds: Fix mutex lock->magic != lock warning
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Linus Torvalds
|
deb4b9dd3b |
xen: branch for v6.7-rc4
-----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQRTLbB6QfY48x44uB6AXGG7T9hjvgUCZWraswAKCRCAXGG7T9hj vlV0AP9241p7vHlIW6PIdfNZt9/dZZpuFnKHz+cE99pTZDl5nwEAoYqXUm/kEb14 VAy7x0XIVdEt+9l4bgO2Qggx+Y184Qs= =APgm -----END PGP SIGNATURE----- Merge tag 'for-linus-6.7a-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: - A fix for the Xen event driver setting the correct return value when experiencing an allocation failure - A fix for allocating space for a struct in the percpu area to not cross page boundaries (this one is for x86, a similar one for Arm was already in the pull request for rc3) * tag 'for-linus-6.7a-rc4-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen/events: fix error code in xen_bind_pirq_msi_to_irq() x86/xen: fix percpu vcpu_info allocation |
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|
Linus Torvalds
|
669fc83452 |
Probes fixes for v6.7-r3:
- objpool: Fix objpool overrun case on memory/cache access delay especially on the big.LITTLE SoC. The objpool uses a copy of object slot index internal loop, but the slot index can be changed on another processor in parallel. In that case, the difference of 'head' local copy and the 'slot->last' index will be bigger than local slot size. In that case, we need to re-read the slot::head to update it. - kretprobe: Fix to use appropriate rcu API for kretprobe holder. Since kretprobe_holder::rp is RCU managed, it should use rcu_assign_pointer() and rcu_dereference_check() correctly. Also adding __rcu tag for finding wrong usage by sparse. - rethook: Fix to use appropriate rcu API for rethook::handler. The same as kretprobe, rethook::handler is RCU managed and it should use rcu_assign_pointer() and rcu_dereference_check(). This also adds __rcu tag for finding wrong usage by sparse. -----BEGIN PGP SIGNATURE----- iQFPBAABCgA5FiEEh7BulGwFlgAOi5DV2/sHvwUrPxsFAmVpfBobHG1hc2FtaS5o aXJhbWF0c3VAZ21haWwuY29tAAoJENv7B78FKz8bNyMIAJSLICKQNuFiBJEn/rty ACWJ9QMOnwi0DoVaepG/m9QJh6AIUUFW4//9helmSm0GIVzxQ2+f8UeKU+sYiVtH ro9atea4W4+FMTvtEB1cU8oG5CDVT4WQdUXbjMktqYe3+WB8Zt8+fIP0mnbTFAVr yStpliGPecmlupJVRYqrJGyDdbkUxXxVlPsP/eDrHFgbBWv8Incw0f+MLGSi6LSE sZ1MaKCdi2tlHbtD/fiowfLoBMZwQAKY4hq/XguVsWh+BGaGUgwtif+8ESwPeu22 KEZLyWDQ1N8XBHyOBotV7vsBEwh6LKtLGVXIBsO4KxVyGw6msxWBis0dt/tkn+kk LEg= =B9WK -----END PGP SIGNATURE----- Merge tag 'probes-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace Pull probes fixes from Masami Hiramatsu: - objpool: Fix objpool overrun case on memory/cache access delay especially on the big.LITTLE SoC. The objpool uses a copy of object slot index internal loop, but the slot index can be changed on another processor in parallel. In that case, the difference of 'head' local copy and the 'slot->last' index will be bigger than local slot size. In that case, we need to re-read the slot::head to update it. - kretprobe: Fix to use appropriate rcu API for kretprobe holder. Since kretprobe_holder::rp is RCU managed, it should use rcu_assign_pointer() and rcu_dereference_check() correctly. Also adding __rcu tag for finding wrong usage by sparse. - rethook: Fix to use appropriate rcu API for rethook::handler. The same as kretprobe, rethook::handler is RCU managed and it should use rcu_assign_pointer() and rcu_dereference_check(). This also adds __rcu tag for finding wrong usage by sparse. * tag 'probes-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: rethook: Use __rcu pointer for rethook::handler kprobes: consistent rcu api usage for kretprobe holder lib: objpool: fix head overrun on RK3588 SBC |
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Linus Torvalds
|
815fb87b75 |
Power management fixes for 6.7-rc4
- Fix the AMD P-state driver's EPP sysfs interface in the cases when the
performance governor is in use (Ayush Jain).
- Make the ->fast_switch() callback in the AMD P-state driver return the
target frequency as expected (Gautham R. Shenoy).
- Allow user space to control the range of frequencies to use via
scaling_min_freq and scaling_max_freq when AMD P-state driver is in
use (Wyes Karny).
- Prevent power domains needed for wakeup signaling from being turned
off during system suspend on Qualcomm systems and prevent performance
states votes from runtime-suspended devices from being lost across
a system suspend-resume cycle in qcom-cpufreq-nvmem (Stephan Gerhold).
- Fix disabling the 792 Mhz OPP in the imx6q cpufreq driver for the
i.MX6ULL types that can run at that frequency (Christoph Niedermaier).
- Eliminate unnecessary and harmful conversions to uW from the DTPM
(dynamic thermal and power management) framework (Lukasz Luba).
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Merge tag 'pm-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"These fix issues in two cpufreq drivers, in the AMD P-state driver and
in the power-capping DTPM framework.
Specifics:
- Fix the AMD P-state driver's EPP sysfs interface in the cases when
the performance governor is in use (Ayush Jain)
- Make the ->fast_switch() callback in the AMD P-state driver return
the target frequency as expected (Gautham R. Shenoy)
- Allow user space to control the range of frequencies to use via
scaling_min_freq and scaling_max_freq when AMD P-state driver is in
use (Wyes Karny)
- Prevent power domains needed for wakeup signaling from being turned
off during system suspend on Qualcomm systems and prevent
performance states votes from runtime-suspended devices from being
lost across a system suspend-resume cycle in qcom-cpufreq-nvmem
(Stephan Gerhold)
- Fix disabling the 792 Mhz OPP in the imx6q cpufreq driver for the
i.MX6ULL types that can run at that frequency (Christoph
Niedermaier)
- Eliminate unnecessary and harmful conversions to uW from the DTPM
(dynamic thermal and power management) framework (Lukasz Luba)"
* tag 'pm-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpufreq/amd-pstate: Only print supported EPP values for performance governor
cpufreq/amd-pstate: Fix scaling_min_freq and scaling_max_freq update
powercap: DTPM: Fix unneeded conversions to micro-Watts
cpufreq/amd-pstate: Fix the return value of amd_pstate_fast_switch()
pmdomain: qcom: rpmpd: Set GENPD_FLAG_ACTIVE_WAKEUP
cpufreq: qcom-nvmem: Preserve PM domain votes in system suspend
cpufreq: qcom-nvmem: Enable virtual power domain devices
cpufreq: imx6q: Don't disable 792 Mhz OPP unnecessarily
|
||
|
Linus Torvalds
|
ce474ae7d0 |
ACPI fixes for 6.7-rc4
- Fix a recently introduced build issue on ARM32 platforms caused by an
inadvertent header file breakage (Dave Jiang).
- Eliminate questionable usage of acpi_driver_data() in the ACPI
backlight cooling device code that leads to NULL pointer dereferences
after recent ACPI core changes (Hans de Goede).
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Merge tag 'acpi-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"This fixes a recently introduced build issue on ARM32 and a NULL
pointer dereference in the ACPI backlight driver due to a design issue
exposed by a recent change in the ACPI bus type code.
Specifics:
- Fix a recently introduced build issue on ARM32 platforms caused by
an inadvertent header file breakage (Dave Jiang)
- Eliminate questionable usage of acpi_driver_data() in the ACPI
backlight cooling device code that leads to NULL pointer
dereferences after recent ACPI core changes (Hans de Goede)"
* tag 'acpi-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: video: Use acpi_video_device for cooling-dev driver data
ACPI: Fix ARM32 platforms compile issue introduced by fw_table changes
|
||
|
Linus Torvalds
|
35f8458480 |
Fix a 6.7-rc1 regression where the arm64 KPTI ends up enabled even on
systems that don't need it. -----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEE5RElWfyWxS+3PLO2a9axLQDIXvEFAmVqHPAACgkQa9axLQDI XvGIPQ/+OL6XCj4DLJm0/FB2yYwn0k1Q58L+MCi1SZsrMYtWHcw4DZCG1pr5csvx fTQx9dQjXstUeSif0sDq60aBVJjOEArc4Zk9wW4d/GZ1lv+ZbZvSDfCfEpNS5arN FjZilwpjB8xacRJ8OABuN3OFurZmYOgjan6xFcjVIEeipBfzG4vJh4J/u/j5+7iQ dMEAo3tMFLYLTC/XUFVp/5m5Q8Enwz/Csnoz4XtwK7JYhm7Kuvl2gj3XOa3sa23Y m1y4PPQTWBC+rJ9KGAUgk8WTRHd417LBZQfOnzmyyFQMEmmVEtRNYlF0NVNr4Umk 5pVhhLHGCUnRg0UEIC5v5w5rk0AsBOBZoETW5QmIfRRA6SApR8jNyjcoCHbjOqXb 65Hu420DPUu3eCmKpjhmF+a/xc5NlT1ArEg9kIuM1Lb1zeZpMmkdE50jTamhLnd2 BbfwD6ViU/f9/u7R4Bl6v0J20XHzbupUBOTnLGBboeBki+o60Sc4ndCMDMc3s3Y7 iIdSDXvZMWp6Tzi9n4zcyGXPJ/oKAVJOI+8Ipdc5ATJ/a3mDYkI9LCkqvPYviaAV X61Rd1/ZNgsD117AbUCSJObYfJHIXYNakd5gLlyo6SinxelhSah8wT9Zzygo+Tbr cOp4RWf3IZLaWPzFUd87N4GvxPQtwzrzja8rualK07Jq67MMZzM= =kXj+ -----END PGP SIGNATURE----- Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull arm64 fix from Catalin Marinas: "Fix a regression where the arm64 KPTI ends up enabled even on systems that don't need it" * tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: Avoid enabling KPTI unnecessarily |
||
|
Linus Torvalds
|
1a2b418566 |
IOMMU Fixes for Linux v6.7-rc3
Including:
- Fix race conditions in device probe path
- Handle ERR_PTR() returns in __iommu_domain_alloc() path
- Update MAINTAINERS entry for Qualcom IOMMUs
- Printk argument fix in device tree specific code
- Several Intel VT-d fixes from Lu Baolu:
- Do not support enforcing cache coherency for non-empty domains
- Avoid devTLB invalidation if iommu is off
- Disable PCI ATS in legacy passthrough mode
- Support non-PCI devices when clearing context
- Fix incorrect cache invalidation for mm notification
- Add MTL to quirk list to skip TE disabling
- Set variable intel_dirty_ops to static
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Merge tag 'iommu-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
- Fix race conditions in device probe path
- Handle ERR_PTR() returns in __iommu_domain_alloc() path
- Update MAINTAINERS entry for Qualcom IOMMUs
- Printk argument fix in device tree specific code
- Several Intel VT-d fixes from Lu Baolu:
- Do not support enforcing cache coherency for non-empty domains
- Avoid devTLB invalidation if iommu is off
- Disable PCI ATS in legacy passthrough mode
- Support non-PCI devices when clearing context
- Fix incorrect cache invalidation for mm notification
- Add MTL to quirk list to skip TE disabling
- Set variable intel_dirty_ops to static
* tag 'iommu-fixes-v6.7-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu: Fix printk arg in of_iommu_get_resv_regions()
iommu/vt-d: Set variable intel_dirty_ops to static
iommu/vt-d: Fix incorrect cache invalidation for mm notification
iommu/vt-d: Add MTL to quirk list to skip TE disabling
iommu/vt-d: Make context clearing consistent with context mapping
iommu/vt-d: Disable PCI ATS in legacy passthrough mode
iommu/vt-d: Omit devTLB invalidation requests when TES=0
iommu/vt-d: Support enforce_cache_coherency only for empty domains
iommu: Avoid more races around device probe
MAINTAINERS: list all Qualcomm IOMMU drivers in the QUALCOMM IOMMU entry
iommu: Flow ERR_PTR out from __iommu_domain_alloc()
|
||
|
Linus Torvalds
|
06a3c59f9c |
sound fixes for 6.7-rc4
No surprise here, including only a collection of HD-audio device-specific small fixes. -----BEGIN PGP SIGNATURE----- iQJCBAABCAAsFiEEIXTw5fNLNI7mMiVaLtJE4w1nLE8FAmVpvSIOHHRpd2FpQHN1 c2UuZGUACgkQLtJE4w1nLE8PRA/+PQFZaI5L5tcEB9+mjH3TUVSYtbBweOBToEbg QFt3KNS550Q6Mcvnhrp1AH7amFkWt354e8iZz5tVAITrFkwkYWImlneZweCWQXeB /TvIViuUr8KMfl2eyAMVRUkuqQ7EoVrkL1uIjNWCernNUQqlc+oUTn6D42lxiwkG mQpzJL/MknSPV+31lv0wZyj7TDSCDPRhmX6Lu6FH+QbbhdZUGpl8etmUUYNa8D1G hh2tPjVGuUxZDcIYtVD3NIjOTFvTyVF3S+cxqW2WT1qs2ZmWH+nBBqZbkGva7gfB /s0TNTTOLq6VD58B5vf25D1AUVEMub5295PKrCnKfo2VO+/PMPQWXBS2pYuCey6y MZpqCKRStgBCCfCZg6byWiVKwqsSJJTvKlXAginYXuK/jFJhnJxqVRQ9Mc6Op81z +c1p0Zy9IEhTAdF2RLGw99zho1B5cx/zBGRvVwq0c9NV+LQwMoRsFKbPr6QAM65K bAb+3wVQ3cG1y8FVz3Amq5JfcbymJ15CLwI5nW3Op47MrUSsYXflbPfgExI7dRTH Xegm8jPbw8V9r66BYAATRQztENxQSGINL/0ngGAS4jEpKN2XTgjSJgBizBdvRis5 RbJERBICEUhFGlogREsareSkkoV20lgIxJ5Nc/uve4RtLaV8ovheTA48NspXZ8ld 6HlRRIg= =57FL -----END PGP SIGNATURE----- Merge tag 'sound-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "No surprise here, including only a collection of HD-audio device-specific small fixes" * tag 'sound-6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda: Disable power-save on KONTRON SinglePC ALSA: hda/realtek: Add supported ALC257 for ChromeOS ALSA: hda/realtek: Headset Mic VREF to 100% ALSA: hda: intel-nhlt: Ignore vbps when looking for DMIC 32 bps format ALSA: hda: cs35l56: Enable low-power hibernation mode on SPI ALSA: cs35l41: Fix for old systems which do not support command ALSA: hda: cs35l41: Remove unnecessary boolean state variable firmware_running ALSA: hda - Fix speaker and headset mic pin config for CHUWI CoreBook XPro |
||
|
Linus Torvalds
|
b1e51588aa |
drm fixes for 6.7-rc4
drm: - Revert unexport of prime helpers for fd/handle conversion dma_resv: - Do not double add fences in dma_resv_add_fence. gpuvm: - Fix GPUVM license identifier. i915: - Mark internal GSC engine with reserved uabi class - Take VGA converters into account in eDP probe - Fix intel_pre_plane_updates() call to ensure workarounds get applied panel: - Revert panel fixes as they require exporting device_is_dependent. nouveau: - fix oversized allocations in new vm path - fix zero-length array - remove a stray lock nt36523: - Fix error check for nt36523. amdgpu: - DMUB fix - DCN 3.5 fixes - XGMI fix - DCN 3.2 fixes - Vangogh suspend fix - NBIO 7.9 fix - GFX11 golden register fix - Backlight fix - NBIO 7.11 fix - IB test overflow fix - DCN 3.1.4 fixes - fix a runtime pm ref count - Retimer fix - ABM fix - DCN 3.1.5 fix - Fix AGP addressing - Fix possible memory leak in SMU error path - Make sure PME is enabled in D3 - Fix possible NULL pointer dereference in debugfs - EEPROM fix - GC 9.4.3 fix amdkfd: - IP version check fix - Fix memory leak in pqm_uninit() -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEEEKbZHaGwW9KfbeusDHTzWXnEhr4FAmVpf7sACgkQDHTzWXnE hr7dzBAAg7iqxlScxzbDEwsKjRRmRv77lRjKJbk8jcjee1b2Bubtj3Ezaa4iIVFc iYFV8GfyeyisSYxlzNHDIA0F95IGdASQSAs1pIHzegCobYyybax2hr/ZhQeThFG1 xwji2PCHnbD2+r1jvVgvY6234+Re7hfQotsL+KWqLGz5YS4sgLw+Vyofm1WxTt7K OTbVvunvfn1PgT36LFOEjaVHAog9IHbZ/4cwEqgucOoTl7rAOXV5mN4WRsBh1B+E h6Ny9O8rMRajC6PDmUiwUBuSPj+TDj8K7WtfUQWhR1EySEikcwClfpWPM/LCyuPr wdv3LCPBIJnFQOa0pJX/3afTc0tB69ETtGrw342fo+wyUOKwaIt9OVlRaDgcjExv TIeTEjP6GJ7lcd/8VkAj97qBexFUQrcKVZjrRfTJuv+ee9KcCv0TA7I8hsqaOew/ 2xirLknX5kHt/pYH6CYsYzEt4ruoE5F0m1fjCpj6VubSl5B+kZsuQzui9BE1WusO +VKsujluhmcQHWH5KQYWqeVtgYa7ZP18o4P+tF5Xon52w2VeP8EqREbgH0uFIcd/ jPVVjyyEgUgWpyw42v0w+EwGXRACnT5kMtDHrKNVsgF43cev2nvKq2GHQ4djvOG/ CYWYCxro+ZbGDfEfPBDY16qh1ra+dnlZTYwYfBcGT5u4RfgDzPo= =YlVI -----END PGP SIGNATURE----- Merge tag 'drm-fixes-2023-12-01' of git://anongit.freedesktop.org/drm/drm Pull drm fixes from Dave Airlie: "Weekly fixes, mostly amdgpu fixes with a scattering of nouveau, i915, and a couple of reverts. Hopefully it will quieten down in coming weeks. drm: - Revert unexport of prime helpers for fd/handle conversion dma_resv: - Do not double add fences in dma_resv_add_fence. gpuvm: - Fix GPUVM license identifier. i915: - Mark internal GSC engine with reserved uabi class - Take VGA converters into account in eDP probe - Fix intel_pre_plane_updates() call to ensure workarounds get applied panel: - Revert panel fixes as they require exporting device_is_dependent. nouveau: - fix oversized allocations in new vm path - fix zero-length array - remove a stray lock nt36523: - Fix error check for nt36523. amdgpu: - DMUB fix - DCN 3.5 fixes - XGMI fix - DCN 3.2 fixes - Vangogh suspend fix - NBIO 7.9 fix - GFX11 golden register fix - Backlight fix - NBIO 7.11 fix - IB test overflow fix - DCN 3.1.4 fixes - fix a runtime pm ref count - Retimer fix - ABM fix - DCN 3.1.5 fix - Fix AGP addressing - Fix possible memory leak in SMU error path - Make sure PME is enabled in D3 - Fix possible NULL pointer dereference in debugfs - EEPROM fix - GC 9.4.3 fix amdkfd: - IP version check fix - Fix memory leak in pqm_uninit()" * tag 'drm-fixes-2023-12-01' of git://anongit.freedesktop.org/drm/drm: (53 commits) Revert "drm/prime: Unexport helpers for fd/handle conversion" drm/amdgpu: Use another offset for GC 9.4.3 remap drm/amd/display: Fix some HostVM parameters in DML drm/amdkfd: Free gang_ctx_bo and wptr_bo in pqm_uninit drm/amdgpu: Update EEPROM I2C address for smu v13_0_0 drm/amd/display: Allow DTBCLK disable for DCN35 drm/amdgpu: Fix cat debugfs amdgpu_regs_didt causes kernel null pointer drm/amd: Enable PCIe PME from D3 drm/amd/pm: fix a memleak in aldebaran_tables_init drm/amdgpu: fix AGP addressing when GART is not at 0 drm/amd/display: update dcn315 lpddr pstate latency drm/amd/display: fix ABM disablement drm/amd/display: Fix black screen on video playback with embedded panel drm/amd/display: Fix conversions between bytes and KB drm/amdkfd: Use common function for IP version check drm/amd/display: Remove config update drm/amd/display: Update DCN35 clock table policy drm/amd/display: force toggle rate wa for first link training for a retimer drm/amdgpu: correct the amdgpu runtime dereference usage count drm/amd/display: Update min Z8 residency time to 2100 for DCN314 ... |
||
|
Linus Torvalds
|
c9a925b7bc |
io_uring-6.7-2023-11-30
-----BEGIN PGP SIGNATURE----- iQJEBAABCAAuFiEEwPw5LcreJtl1+l5K99NY+ylx4KYFAmVo5jYQHGF4Ym9lQGtl cm5lbC5kawAKCRD301j7KXHgpuNNEAC7sm239X9ixFQ7E70kxz1FyPpF6KS5oVWT piAEbUkWQON5yI7M7C2l8w6/xDi8yCIf272HnvPlYfJzkoOfjt7hjWpxtKUOVYJe MtL+KSiXqtdv8fvYaS61dyPzqJQ7q7D1cnCVUv7eKm7hSo7NZQH94fzC7UW+Xm/G 2wng8C5Ltd0IfLpqQJnrn/yGnsCw3PfQYiC7unMXB5NT5eriM5jnHGpl9EPMLxbP TWIyUYiqxzrd9QkCTdpEZkKP35Pho/tzCtc3mN0+9tcMuoESX0KnQiR5q5IPet4/ kkTvZZ7Kw18k8Eb99JSH2G2maFrrEZg0C3MfTF0W4O2t19Pajx8cyhVyAa1ib32o TcT6+M1XdAp2rEpfDSRvNCqRpMXm1zARpo4GvEHqGbY5/VefXeJPPaJyAu0CLNlk p1FJCQq8hMHd71GCfzb9d1Z+Mozd7dOO1CJqPYz35WXdtXSJ0b8Hw/aVIaYT9JP7 IbP9IE7ZuPPZq+BC6FTH1O2zbJ0h+PSC5yAONw+Py3YHUT586e11nCyhQUrOJQmE kJENcknQCtcFgckXzT5ROh+Vlt6KHjltrVOAT3Jl2LhRssczJo6/4+BZfgvHJipE TSOdKFS1Saxh0XX8DGovYT78rg3tullzkvWEVFRrDk6MlFOCHGAs1E0Prz7yqzE4 KscqZOwIZw== =wA/u -----END PGP SIGNATURE----- Merge tag 'io_uring-6.7-2023-11-30' of git://git.kernel.dk/linux Pull io_uring fixes from Jens Axboe: - Fix an issue with discontig page checking for IORING_SETUP_NO_MMAP - Fix an issue with not allowing IORING_SETUP_NO_MMAP also disallowing mmap'ed buffer rings - Fix an issue with deferred release of memory mapped pages - Fix a lockdep issue with IORING_SETUP_NO_MMAP - Use fget/fput consistently, even from our sync system calls. No real issue here, but if we were ever to allow closing io_uring descriptors it would be required. Let's play it safe and just use the full ref counted versions upfront. Most uses of io_uring are threaded anyway, and hence already doing the full version underneath. * tag 'io_uring-6.7-2023-11-30' of git://git.kernel.dk/linux: io_uring: use fget/fput consistently io_uring: free io_buffer_list entries via RCU io_uring/kbuf: prune deferred locked cache when tearing down io_uring/kbuf: recycle freed mapped buffer ring entries io_uring/kbuf: defer release of mapped buffer rings io_uring: enable io_mem_alloc/free to be used in other parts io_uring: don't guard IORING_OFF_PBUF_RING with SETUP_NO_MMAP io_uring: don't allow discontig pages for IORING_SETUP_NO_MMAP |
||
|
Linus Torvalds
|
ee0c8a9b34 |
block-6.7-2023-12-01
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Merge tag 'block-6.7-2023-12-01' of git://git.kernel.dk/linux
Pull block fixes from Jens Axboe:
- NVMe pull request via Keith:
- Invalid namespace identification error handling (Marizio Ewan,
Keith)
- Fabrics keep-alive tuning (Mark)
- Fix for a bad error check regression in bcache (Markus)
- Fix for a performance regression with O_DIRECT (Ming)
- Fix for a flush related deadlock (Ming)
- Make the read-only warn on per-partition (Yu)
* tag 'block-6.7-2023-12-01' of git://git.kernel.dk/linux:
nvme-core: check for too small lba shift
blk-mq: don't count completed flush data request as inflight in case of quiesce
block: Document the role of the two attribute groups
block: warn once for each partition in bio_check_ro()
block: move .bd_inode into 1st cacheline of block_device
nvme: check for valid nvme_identify_ns() before using it
nvme-core: fix a memory leak in nvme_ns_info_from_identify()
nvme: fine-tune sending of first keep-alive
bcache: revert replacing IS_ERR_OR_NULL with IS_ERR
|
||
|
Linus Torvalds
|
abd792f330 |
- Fix DM verity target's FEC support to always initialize IO before it
frees it. Also fix alignment of struct dm_verity_fec_io within the per-bio-data. - Fix DM verity target to not FEC failed readahead IO. - Update DM flakey target to use MAX_ORDER rather than MAX_ORDER - 1. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEJfWUX4UqZ4x1O2wixSPxCi2dA1oFAmVqIjwACgkQxSPxCi2d A1pcwAgA00/Fln0p84cD3wFKauC61RALx5awoS0S2obAN+JY9yLs3xl1XDm92HyI 9giOXofHVKIlOQW6qASfZoCNGvtKPCVoKZF9KXKCqpK8wyKpuuG+yTPVeSsOK/fw pKcPp3FyXsu+9FXH3oO9xauLPOiGDC7BfIcHFQITHzT7qwMxQcPQ1HwfVwjrWIjG lgIQToiSZokBKBWXKyo63SMVkwWhlTdrfG1CJrc0UC9/f6DBMS0RTYJqmNJ3V8ak i0QyQdGZxc9TFuZe/G+Oq381z+X42iRDlluVU3ClMQTyoemQRcySi98CjRLruu7x 1H79s8ZIaJc/4mkxlJUQingL+dmuGA== =Av5r -----END PGP SIGNATURE----- Merge tag 'dm-6.7/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm Pull device mapper fixes from Mike Snitzer: - Fix DM verity target's FEC support to always initialize IO before it frees it. Also fix alignment of struct dm_verity_fec_io within the per-bio-data - Fix DM verity target to not FEC failed readahead IO - Update DM flakey target to use MAX_ORDER rather than MAX_ORDER - 1 * tag 'dm-6.7/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm-flakey: start allocating with MAX_ORDER dm-verity: align struct dm_verity_fec_io properly dm verity: don't perform FEC for failed readahead IO dm verity: initialize fec io before freeing it |
||
|
Linus Torvalds
|
ff4a9f4905 |
SCSI fixes on 20231130
3 small fixes, one in drivers. The core changes are to the internal representation of flags in scsi_devices which removes space wasting bools in favour of single bit flags and to add a flag to force a runtime resume which is used by ATA devices. Signed-off-by: James E.J. Bottomley <jejb@linux.ibm.com> -----BEGIN PGP SIGNATURE----- iJwEABMIAEQWIQTnYEDbdso9F2cI+arnQslM7pishQUCZWjFkSYcamFtZXMuYm90 dG9tbGV5QGhhbnNlbnBhcnRuZXJzaGlwLmNvbQAKCRDnQslM7pisheG9AP9CIjOP 8g3+RCnysbYlctJBsacaLyq9kROyaOY7dnKudQEArMGZ609afSXYrHGzBCtQ8F6T Cvge1QVk00Bu4tKvA6Y= =2Q9R -----END PGP SIGNATURE----- Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Three small fixes, one in drivers. The core changes are to the internal representation of flags in scsi_devices which removes space wasting bools in favour of single bit flags and to add a flag to force a runtime resume which is used by ATA devices" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: scsi: sd: Fix system start for ATA devices scsi: Change SCSI device boolean fields to single bit flags scsi: ufs: core: Clear cmd if abort succeeds in MCQ mode |
||
|
Linus Torvalds
|
c1c09da07c |
\n
-----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAmVpr4QACgkQnJ2qBz9k QNkoPQf/aurRZZcMHmcYEmd//O59iRXYQVgO9+ORtjqIgB4wHD5q5eYK70eatxmR nZkntlFZSTUj9bbgzwOJWzhrsBGfZ2tWY1JFQl/Dlk2nF02rg2aIt1ZksqtNF4wX Qt/yGpf+5ubYLxmpxHhBirR3l9DgBppZsTbS2oY5ki17IM4+eOrvMWHHyMcO9Tpb jWaiqDueZRL6HCP52cusAJZ6x72vJzivbGGQffbfR4NNGz4YXaiCUQcCnAoW8xcO u8xTZ1iH6jrolBSJHNA9fKoYN69aTjPkGFQFnZuOBBgVlUyWYXeJO+9psxusqhE0 FrghuuGZMhQNkTAKbJTpmeMQ8XRYFQ== =Lhm6 -----END PGP SIGNATURE----- Merge tag 'fs_for_v6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs Pull ext2 fix from Jan Kara: "Fix an ext2 bug introduced by changes in ext2 & iomap stepping on each other toes (apparently ext2 driver does not get much testing in linux-next)" * tag 'fs_for_v6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: ext2: Fix ki_pos update for DIO buffered-io fallback case |
||
|
Linus Torvalds
|
e6861be452 |
More bcachefs bugfixes for 6.7
Bigger/user visible fixes:
- bcache & bcachefs were broken with CFI enabled; patch for closures to
fix type punning
- mark erasure coding as extra-experimental; there are incompatible
disk space accounting changes coming for erasure coding, and I'm
still seeing checksum errors in some tests
- several fixes for durability-related issues (durability is a device
specific setting where we can tell bcachefs that data on a given
device should be counted as replicated x times )
- a fix for a rare livelock when a btree node merge then updates a
parent node that is almost full
- fix a race in the device removal path, where dropping a pointer in a
btree node to a device would be clobbered by an in flight btree write
updating the btree node key on completion
- fix one SRCU lock hold time warning in the btree gc code - ther's
still a bunch more of these to fix
- fix a rare race where we'd start copygc before initializing the "are
we rw" percpu refcount; copygc would think we were already ro and die
immediately
https://evilpiepirate.org/~testdashboard/ci?branch=bcachefs-for-upstream
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Merge tag 'bcachefs-2023-11-29' of https://evilpiepirate.org/git/bcachefs
Pull more bcachefs bugfixes from Kent Overstreet:
- bcache & bcachefs were broken with CFI enabled; patch for closures to
fix type punning
- mark erasure coding as extra-experimental; there are incompatible
disk space accounting changes coming for erasure coding, and I'm
still seeing checksum errors in some tests
- several fixes for durability-related issues (durability is a device
specific setting where we can tell bcachefs that data on a given
device should be counted as replicated x times)
- a fix for a rare livelock when a btree node merge then updates a
parent node that is almost full
- fix a race in the device removal path, where dropping a pointer in a
btree node to a device would be clobbered by an in flight btree write
updating the btree node key on completion
- fix one SRCU lock hold time warning in the btree gc code - ther's
still a bunch more of these to fix
- fix a rare race where we'd start copygc before initializing the "are
we rw" percpu refcount; copygc would think we were already ro and die
immediately
* tag 'bcachefs-2023-11-29' of https://evilpiepirate.org/git/bcachefs: (23 commits)
bcachefs: Extra kthread_should_stop() calls for copygc
bcachefs: Convert gc_alloc_start() to for_each_btree_key2()
bcachefs: Fix race between btree writes and metadata drop
bcachefs: move journal seq assertion
bcachefs: -EROFS doesn't count as move_extent_start_fail
bcachefs: trace_move_extent_start_fail() now includes errcode
bcachefs: Fix split_race livelock
bcachefs: Fix bucket data type for stripe buckets
bcachefs: Add missing validation for jset_entry_data_usage
bcachefs: Fix zstd compress workspace size
bcachefs: bpos is misaligned on big endian
bcachefs: Fix ec + durability calculation
bcachefs: Data update path won't accidentaly grow replicas
bcachefs: deallocate_extra_replicas()
bcachefs: Proper refcounting for journal_keys
bcachefs: preserve device path as device name
bcachefs: Fix an endianness conversion
bcachefs: Start gc, copygc, rebalance threads after initing writes ref
bcachefs: Don't stop copygc thread on device resize
bcachefs: Make sure bch2_move_ratelimit() also waits for move_ops
...
|
||
Rafael J. Wysocki
|
7d4c44a53d |
Merge branch 'acpi-tables'
Merge a fix for a recently introduced build issue on ARM32 platforms caused by an inadvertent header file breakage (Dave Jiang). * acpi-tables: ACPI: Fix ARM32 platforms compile issue introduced by fw_table changes |
||
|
Rafael J. Wysocki
|
a6b3125692 |
Merge branch 'powercap'
Merge a power capping fix for 6.7-rc4 which eliminates unnecessary and harmful conversions to uW from the DTPM (dynamic thermal and power management) framework (Lukasz Luba). * powercap: powercap: DTPM: Fix unneeded conversions to micro-Watts |
||
Jens Axboe
|
8ad3ac92f0 |
nvme fixes for Linux 6.7
- Invalid namespace identification error handling (Marizio Ewan, Keith) - Fabrics keep-alive tuning (Mark) -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE3Fbyvv+648XNRdHTPe3zGtjzRgkFAmVqAtwACgkQPe3zGtjz RglRnA/+M7S1MTBBeW9XfjJWZQcQQdcspXskc+ylFfKMYkcxOHPNZVYnA2tvcDCP g9Vg8NtHab8b4i4Q/axBPnYSWpYimvj6mse3G9DutA7Ag/G7vA+hNoh6YZ0PE7xO SNASA34lBN5dpfM1IZ8JyOn22XH+R6HMHLRpw7vBkdBNCQr9/m2OUs2ckQ7rVARj +FCibJBog8WZVCULvDW2nt9cOyHM5jc6Ti3r0+s60u0YKNpoJ4Am6JSHdeBeDj2t vh1Mto3C0z9E/nn7VNZCZNohQrsP/YnmC7henS1xnALlNTO8lVJK9w0ZBgoiNqhA 2fIfl4k1txjqrhIshtsptP1uAh8j90evZ7QbQ3B1dPAuzHWVETxhZ2Bzn/gJrId4 rB/wtrQimezvFqpw83s8yQPMmvO3jhW8DYsEvctHtzn3bbIRiMsagfe5P0TgQsCb dqXgVZzWTqyPaa1/M8X0VaWmh4XPKqqZULCuwKifRVnn0GIPavhMmtfqxmRvyayg WP9bhe2Sgr+FrItdRjDYMrmQiE4onzhSpMRWPWaKxsfYS9sf2DgUcEMKb1FrlHaQ ApTXrP9tM48K4aqybjRJfcQkuDesGgnZu2q5EsmU6ZHhD86kIthX/lJkdd2EmY8J iykLCeTMRo6nsut2Lr2yTt7H6Y4gUhsUrNLCO50Go7jMyxISkqA= =tdDy -----END PGP SIGNATURE----- Merge tag 'nvme-6.7-2023-12-01' of git://git.infradead.org/nvme into block-6.7 Pull NVMe fixes from Keith: "nvme fixes for Linux 6.7 - Invalid namespace identification error handling (Marizio Ewan, Keith) - Fabrics keep-alive tuning (Mark)" * tag 'nvme-6.7-2023-12-01' of git://git.infradead.org/nvme: nvme-core: check for too small lba shift nvme: check for valid nvme_identify_ns() before using it nvme-core: fix a memory leak in nvme_ns_info_from_identify() nvme: fine-tune sending of first keep-alive |
||
Keith Busch
|
74fbc88e16 |
nvme-core: check for too small lba shift
The block layer doesn't support logical block sizes smaller than 512 bytes. The nvme spec doesn't support that small either, but the driver isn't checking to make sure the device responded with usable data. Failing to catch this will result in a kernel bug, either from a division by zero when stacking, or a zero length bio. Reviewed-by: Jens Axboe <axboe@kernel.dk> Signed-off-by: Keith Busch <kbusch@kernel.org> |
||
Ming Lei
|
0e4237ae8d |
blk-mq: don't count completed flush data request as inflight in case of quiesce
Request queue quiesce may interrupt flush sequence, and the original request may have been marked as COMPLETE, but can't get finished because of queue quiesce. This way is fine from driver viewpoint, because flush sequence is block layer concept, and it isn't related with driver. However, driver(such as dm-rq) can call blk_mq_queue_inflight() to count & drain inflight requests, then the wait & drain never gets done because the completed & not-finished flush request is counted as inflight. Fix this issue by not counting completed flush data request as inflight in case of quiesce. Cc: Mike Snitzer <snitzer@kernel.org> Cc: David Jeffery <djeffery@redhat.com> Cc: John Pittman <jpittman@redhat.com> Signed-off-by: Ming Lei <ming.lei@redhat.com> Link: https://lore.kernel.org/r/20231201085605.577730-1-ming.lei@redhat.com Signed-off-by: Jens Axboe <axboe@kernel.dk> |
||
Daniel Mentz
|
c2183b3dcc |
iommu: Fix printk arg in of_iommu_get_resv_regions()
The variable phys is defined as (struct resource *) which aligns with
the printk format specifier %pr. Taking the address of it results in a
value of type (struct resource **) which is incompatible with the format
specifier %pr. Therefore, remove the address of operator (&).
Fixes:
|
||
Masami Hiramatsu (Google)
|
a1461f1fd6 |
rethook: Use __rcu pointer for rethook::handler
Since the rethook::handler is an RCU-maganged pointer so that it will
notice readers the rethook is stopped (unregistered) or not, it should
be an __rcu pointer and use appropriate functions to be accessed. This
will use appropriate memory barrier when accessing it. OTOH,
rethook::data is never changed, so we don't need to check it in
get_kretprobe().
NOTE: To avoid sparse warning, rethook::handler is defined by a raw
function pointer type with __rcu instead of rethook_handler_t.
Link: https://lore.kernel.org/all/170126066201.398836.837498688669005979.stgit@devnote2/
Fixes:
|
||
JP Kobryn
|
d839a656d0 |
kprobes: consistent rcu api usage for kretprobe holder
It seems that the pointer-to-kretprobe "rp" within the kretprobe_holder is
RCU-managed, based on the (non-rethook) implementation of get_kretprobe().
The thought behind this patch is to make use of the RCU API where possible
when accessing this pointer so that the needed barriers are always in place
and to self-document the code.
The __rcu annotation to "rp" allows for sparse RCU checking. Plain writes
done to the "rp" pointer are changed to make use of the RCU macro for
assignment. For the single read, the implementation of get_kretprobe()
is simplified by making use of an RCU macro which accomplishes the same,
but note that the log warning text will be more generic.
I did find that there is a difference in assembly generated between the
usage of the RCU macros vs without. For example, on arm64, when using
rcu_assign_pointer(), the corresponding store instruction is a
store-release (STLR) which has an implicit barrier. When normal assignment
is done, a regular store (STR) is found. In the macro case, this seems to
be a result of rcu_assign_pointer() using smp_store_release() when the
value to write is not NULL.
Link: https://lore.kernel.org/all/20231122132058.3359-1-inwardvessel@gmail.com/
Fixes:
|
||
wuqiang.matt
|
d67f39d2b8 |
lib: objpool: fix head overrun on RK3588 SBC
objpool overrun stress with test_objpool on OrangePi5+ SBC triggered the
following kernel warnings:
WARNING: CPU: 6 PID: 3115 at lib/objpool.c:168 objpool_push+0xc0/0x100
This message is from objpool.c:168:
WARN_ON_ONCE(tail - head > pool->nr_objs);
The overrun test case is to validate the case that pre-allocated objects
are insufficient: 8 objects are pre-allocated for each node and consumer
thread per node tries to grab 16 objects in a row. The testing system is
OrangePI 5+, with RK3588, a big.LITTLE SOC with 4x A76 and 4x A55. When
disabling either all 4 big or 4 little cores, the overrun tests run well,
and once with big and little cores mixed together, the overrun test would
always cause an overrun loop. It's likely the memory timing differences
of big and little cores cause this trouble. Here are the debugging data
of objpool_try_get_slot after try_cmpxchg_release:
objpool_pop: cpu: 4/0 0:0 head: 278/279 tail:278 last:276/278
The local copies of 'head' and 'last' were 278 and 276, and reloading of
'slot->head' and 'slot->last' got 279 and 278. After try_cmpxchg_release
'slot->head' became 'head + 1', which is correct. But what's wrong here
is the stale value of 'last', and that stale value of 'last' finally led
the overrun of 'head'.
Memory updating of 'last' and 'head' are performed in push() and pop()
independently, which could be the culprit leading this out of order
visibility of 'last' and 'head'. So for objpool_try_get_slot(), it's
not enough only checking the condition of 'head != slot', the implicit
condition 'last - head <= nr_objs' must also be explicitly asserted to
guarantee 'last' is always behind 'head' before the object retrieving.
This patch will check and try reloading of 'head' and 'last' to ensure
'last' is behind 'head' at the time of object retrieving. Performance
testings show the average impact is about 0.1% for X86_64 and 1.12% for
ARM64. Here are the results:
OS: Debian 10 X86_64, Linux 6.6rc
HW: XEON 8336C x 2, 64 cores/128 threads, DDR4 3200MT/s
1T 2T 4T 8T 16T
native: 49543304 99277826 199017659 399070324 795185848
objpool: 29909085 59865637 119692073 239750369 478005250
objpool+: 29879313
|
||
|
Linus Torvalds
|
994d5c58e5 |
hardening fixes for v6.7-rc4
- struct_group: propagate attributes to top-level union (Dmitry Antipov) - gcc-plugins: randstruct: Update code comment in relayout_struct (Gustavo A. R. Silva) - MAINTAINERS: refresh LLVM support (Nick Desaulniers) -----BEGIN PGP SIGNATURE----- iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAmVpAJwWHGtlZXNjb29r QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJqQ1EACjnOtE8DZiGqdnp1L3pWBOdY5Q doj52RCF1OfRrNlkivIFipuI4mo2TdoXVaDlkfYdk+iPZfSX3SnwRX65g6WF4IYh OKi2JTLVH0BoyevnPbFzAtq2BABKc0Vy6kTtWHKXLDSYVRiVHG8Wth31Q+U5k751 H+xMsdtMQVokxy9Yx9n4ZjNmFFTlhFIypqL0iDh0qTQkbm+kIvdyMwgPhzzr0KLz 53buhPx6243x/BF+TCipLg2/YgANm8GR2SQQaAUE0qhFUzhkUmg3dBI8dXLh03a3 n31fnCDcgpjKn9HtENz7ZoUZyQpO1X1NMW90WoVgJSaPAgayLZ0jCmq8LUjNw/Hm FARXi0EAHdl2TvqqHPN825KM+GbNLytiEu06C7mLTzcimg2g4YwJYtqCDav7rnRo kp2pgddilVNQrIr1M0BhrN3iFP2CZQ5vMajZVEZ4/BdLVhunUz8aKVu4uei0+ElH pMwaQwiBD/vZBjqNAWrhhpnv0W9F19ERL+KL5LlpCtpCDmOZUXG3f7hP2PANRbfi 8wQvy4LIBzFIQBfoZ/HWuY98ieMRJ4CL8sYjDp28VWODbN5gkPjTGjNUVHWPjnX6 gWJYgkuhjbsZ2Wl66VSIKxbP1yWdboS08IXuTmAkvrA9HoxbboD3qvJWKKvkYlTT 3TRgysJGbfStO9ZprQ== =P/c0 -----END PGP SIGNATURE----- Merge tag 'hardening-v6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux Pull hardening fixes from Kees Cook: - struct_group: propagate attributes to top-level union (Dmitry Antipov) - gcc-plugins: randstruct: Update code comment in relayout_struct (Gustavo A. R. Silva) - MAINTAINERS: refresh LLVM support (Nick Desaulniers) * tag 'hardening-v6.7-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux: gcc-plugins: randstruct: Update code comment in relayout_struct() uapi: propagate __struct_group() attributes to the container union MAINTAINERS: refresh LLVM support |