Rename kvm_unmap_rmap() and kvm_zap_rmap() to kvm_zap_rmap() and
__kvm_zap_rmap() respectively to show that what was the "unmap" helper is
just a wrapper for the "zap" helper, i.e. that they do the exact same
thing, one just exists to deal with its caller passing in more params.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220715224226.3749507-6-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rename __kvm_zap_rmaps() to kvm_rmap_zap_gfn_range() to avoid future
confusion with a soon-to-be-introduced __kvm_zap_rmap(). Using a plural
"rmaps" is somewhat ambiguous without additional context, as it's not
obvious whether it's referring to multiple rmap lists, versus multiple
rmap entries within a single list.
Use kvm_rmap_zap_gfn_range() to align with the pattern established by
kvm_rmap_zap_collapsible_sptes(), without losing the information that it
zaps only rmap-based MMUs, i.e. don't rename it to __kvm_zap_gfn_range().
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220715224226.3749507-5-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Drop the trailing "p" from rmap helpers, i.e. rename functions to simply
be kvm_<action>_rmap(). Declaring that a function takes a pointer is
completely unnecessary and goes against kernel style.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220715224226.3749507-4-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Use pte_list_destroy() directly when recycling rmaps instead of bouncing
through kvm_unmap_rmapp() and kvm_zap_rmapp(). Calling kvm_unmap_rmapp()
is unnecessary and odd as it requires passing dummy parameters; passing
NULL for @slot when __rmap_add() already has a valid slot is especially
weird and confusing.
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220715224226.3749507-3-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Return a u64, not an int, from mmu_spte_clear_track_bits(). The return
value is the old SPTE value, which is very much a 64-bit value. The sole
caller that consumes the return value, drop_spte(), already uses a u64.
The only reason that truncating the SPTE value is not problematic is
because drop_spte() only queries the shadow-present bit, which is in the
lower 32 bits.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220715224226.3749507-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
enter_svm_guest_mode() first calls nested_vmcb02_prepare_control() to copy
control fields from VMCB12 to the current VMCB, then
nested_vmcb02_prepare_save() to perform a similar copy of the save area.
This means that nested_vmcb02_prepare_control() still runs with the
previous save area values in the current VMCB so it shouldn't take the L2
guest CS.Base from this area.
Explicitly pull CS.Base from the actual VMCB12 instead in
enter_svm_guest_mode().
Granted, having a non-zero CS.Base is a very rare thing (and even
impossible in 64-bit mode), having it change between nested VMRUNs is
probably even rarer, but if it happens it would create a really subtle bug
so it's better to fix it upfront.
Fixes: 6ef88d6e36 ("KVM: SVM: Re-inject INT3/INTO instead of retrying the instruction")
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Message-Id: <4caa0f67589ae3c22c311ee0e6139496902f2edc.1658159083.git.maciej.szmigiero@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If a watch is being added to a queue, it needs to guard against
interference from addition of a new watch, manual removal of a watch and
removal of a watch due to some other queue being destroyed.
KEYCTL_WATCH_KEY guards against this for the same {key,queue} pair by
holding the key->sem writelocked and by holding refs on both the key and
the queue - but that doesn't prevent interaction from other {key,queue}
pairs.
While add_watch_to_object() does take the spinlock on the event queue,
it doesn't take the lock on the source's watch list. The assumption was
that the caller would prevent that (say by taking key->sem) - but that
doesn't prevent interference from the destruction of another queue.
Fix this by locking the watcher list in add_watch_to_object().
Fixes: c73be61ced ("pipe: Add general notification queue support")
Reported-by: syzbot+03d7b43290037d1f87ca@syzkaller.appspotmail.com
Signed-off-by: David Howells <dhowells@redhat.com>
cc: keyrings@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Since __post_watch_notification() walks wlist->watchers with only the
RCU read lock held, we need to use RCU methods to add to the list (we
already use RCU methods to remove from the list).
Fix add_watch_to_object() to use hlist_add_head_rcu() instead of
hlist_add_head() for that list.
Fixes: c73be61ced ("pipe: Add general notification queue support")
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Extend the existing test cases to test the conversion from XRGB8888 to
RGB565.
The documentation and the color picker available on [1] are useful
resources to understand this patch and validate the values returned by
the conversion function.
Tested-by: Tales L. Aparecida <tales.aparecida@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: http://www.barth-dev.de/online/rgb565-color-picker/ # [1]
Link: https://patchwork.freedesktop.org/patch/msgid/20220726230916.390575-5-jose.exposito89@gmail.com
In order to support multiple destination format conversions, store the
destination pitch and the expected result in its own structure.
Tested-by: Tales L. Aparecida <tales.aparecida@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726230916.390575-4-jose.exposito89@gmail.com
The tests available at the moment only check the conversion from
XRGB8888 to RGB332. However, more conversions will be tested in the
future.
In order to make the struct and functions present in the tests more
generic, rename xrgb8888_to_rgb332_* to convert_xrgb8888_*.
Tested-by: Tales L. Aparecida <tales.aparecida@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726230916.390575-3-jose.exposito89@gmail.com
The tests fail on big endian architectures, like PowerPC:
$ ./tools/testing/kunit/kunit.py run \
--kunitconfig=drivers/gpu/drm/tests \
--arch=powerpc --cross_compile=powerpc64-linux-gnu-
Transform the XRGB8888 buffer from little endian to the CPU endian
before calling the conversion function to avoid this error.
Fixes: 8f45610491 ("drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_rgb332()")
Reported-by: David Gow <davidgow@google.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726230916.390575-2-jose.exposito89@gmail.com
When HAVE_FUNCTION_GRAPH_RET_ADDR_PTR is defined, the return
address to the fgraph caller is recovered by tagging it along with the
stack pointer of ftrace stack. This makes the stack unwinding more
reliable.
When the fgraph return address is modified to return_to_handler,
ftrace_graph_ret_addr tries to restore it to the original
value using tagged stack pointer.
Fix this by passing tagged sp to ftrace_graph_ret_addr.
Fixes: d81675b60d ("s390/unwind: recover kretprobe modified return address in stacktrace")
Cc: <stable@vger.kernel.org> # 5.18
Reviewed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
With generic entry in place switch the nmi handler to use
the generic entry helper functions.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
The type NT_S390_PV_CPU_DATA note contains the encrypted CPU state of
a PV VCPU. It's only relevant in dumps of s390 PV VMs and can't be
decrypted without a second block of encrypted data which provides key
parts. Therefore we only reserve the note type here.
The zgetdump tool from the s390-tools package can, together with a
Customer Communication Key, be used to convert a PV VM dump into a
normal VM dump. zgetdump will decrypt the CPU data and overwrite the
other respective notes to make the data accessible for crash and other
debugging tools.
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
[agordeev@linux.ibm.com changed desctiption]
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Add "Lowcore Area Start" and "Lowcore Area End" markers
that fence pages where absolute lowcore resides.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Temporary unsetting of the prefix page in memcpy_absolute() routine
poses a risk of executing code path with unexpectedly disabled prefix
page. This rework avoids the prefix page uninstalling and disabling
of normal and machine check interrupts when accessing the absolute
zero memory.
Although memcpy_absolute() routine can access the whole memory, it is
only used to update the absolute zero lowcore. This rework therefore
introduces a new mechanism for the absolute zero lowcore access and
scraps memcpy_absolute() routine for good.
Instead, an area is reserved in the virtual memory that is used for
the absolute lowcore access only. That area holds an array of 8KB
virtual mappings - one per CPU. Whenever a CPU is brought online, the
corresponding item is mapped to the real address of the previously
installed prefix page.
The absolute zero lowcore access works like this: a CPU calls the
new primitive get_abs_lowcore() to obtain its 8KB mapping as a
pointer to the struct lowcore. Virtual address references to that
pointer get translated to the real addresses of the prefix page,
which in turn gets swapped with the absolute zero memory addresses
due to prefixing. Once the pointer is not needed it must be released
with put_abs_lowcore() primitive:
struct lowcore *abs_lc;
unsigned long flags;
abs_lc = get_abs_lowcore(&flags);
abs_lc->... = ...;
put_abs_lowcore(abs_lc, flags);
To ensure the described mechanism works large segment- and region-
table entries must be avoided for the 8KB mappings. Failure to do
so results in usage of Region-Frame Absolute Address (RFAA) or
Segment-Frame Absolute Address (SFAA) large page fields. In that
case absolute addresses would be used to address the prefix page
instead of the real ones and the prefixing would get bypassed.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Make the absolute lowcore assignments immediately follow
the boot CPU lowcore same member assignments. This way
readability improves when reading from up to down, with
no out of order mcck stack allocation in-between.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Uncouple input and output arguments by making the latter
the function return value.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
As result of commit 915fea04f9 ("s390/smp: enable DAT before
CPU restart callback is called") the low-address protection bit
gets mistakenly unset in control register 0 save area of the
absolute zero memory. That area is used when manual PSW restart
happened to hit an offline CPU. In this case the low-address
protection for that CPU will be dropped.
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Fixes: 915fea04f9 ("s390/smp: enable DAT before CPU restart callback is called")
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Use the possessive "its" instead of the contraction "it's"
where appropriate.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: linux-s390@vger.kernel.org
Link: https://lore.kernel.org/r/20220715020010.12678-1-rdunlap@infradead.org
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Pull changes that finalize switching of copy_oldmem_page() callback
to iov_iter interface. These changes were pulled in work.iov_iter of
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
This fixes the paths of x86 / arm efi-stub source files.
Signed-off-by: João Paulo Rechi Vita <jprvita@endlessos.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20220727140539.10021-1-jprvita@endlessos.org
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Self contain the trip initialization from the device tree in a single
function for the sake of making the code flow more clear.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-11-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Now that we have the thermal trip stored in the thermal zone in a
generic way, we can rely on them and remove one indirection we found
in the thermal_of code and do one more step forward the removal of the
duplicated structures.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-10-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The thermal trip points are properties of a thermal zone and the
different sub systems should be able to save them in the thermal zone
structure instead of having their own definition.
Give the opportunity to the drivers to create a thermal zone with
thermal trips which will be accessible directly from the thermal core
framework.
As we added the thermal trip points structure in the thermal zone,
let's extend the thermal zone register function to have the thermal
trip structures as a parameter and store it in the 'trips' field of
the thermal zone structure.
The thermal zone contains the trip point, we can store them directly
when registering the thermal zone. That will allow another step
forward to remove the duplicate thermal zone structure we find in the
thermal_of code.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-9-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
In order to use thermal trips defined in the thermal structure, rename
the 'trips' field to 'num_trips' to have the 'trips' field containing the
thermal trip points.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-8-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The function 'thermal_set_delay_jiffies' is only used in
thermal_core.c but it is defined and implemented in a separate
file. Move the function to thermal_core.c and make it static.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20220722200007.1839356-7-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Different functions are exporting the symbols but are actually only
used by the thermal framework internals. Remove these EXPORT_SYMBOLS.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-6-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The structure thermal_trip is now generic and will be usable by the
different sensor drivers in place of their own structure.
Move its definition to thermal.h to make it accessible.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20220722200007.1839356-5-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The device node pointer is no longer needed in the thermal trip
structure, remove it.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20220722200007.1839356-4-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The thermal_of code builds a trip array associated with the node
pointer in order to compare the trip point phandle with the list.
The thermal trip is a thermal zone property and should be moved
there. If some sensors have hardcoded trip points, they should use the
exported structure instead of redefining again and again their own
structure and data to describe exactly the same things.
In order to move this to the thermal.h header and allow more cleanup,
we need to remove the node pointer from the structure.
Instead of building storing the device node, we search directly in the
device tree the corresponding node. That results in a simplification
of the code and allows to move the structure to thermal.h
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Link: https://lore.kernel.org/r/20220722200007.1839356-3-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
The pr_err already tells it is an error, it is pointless to add the
'Error:' string in the messages. Remove them.
Cc: Alexandre Bailon <abailon@baylibre.com>
Cc: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linexp.org>
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Link: https://lore.kernel.org/r/20220722200007.1839356-2-daniel.lezcano@linexp.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
As the trip temperature is already available when calling the function
handle_critical_trips(), pass it as a parameter instead of having this
function calling the ops again to retrieve the same data.
Reviewed-by: Lukasz Luba <lukasz.luba@arm.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20220718145038.1114379-2-daniel.lezcano@linaro.org
Include sys/time.h and pthread.h in tmon.h, so that types
"pthread_mutex_t" and "struct timeval tv" are known when tmon.h
references them.
Without these headers, compiling tmon against musl-libc will fail with
these errors:
In file included from sysfs.c:31:0:
tmon.h:47:8: error: unknown type name 'pthread_mutex_t'
extern pthread_mutex_t input_lock;
^~~~~~~~~~~~~~~
make[3]: *** [<builtin>: sysfs.o] Error 1
make[3]: *** Waiting for unfinished jobs....
In file included from tui.c:31:0:
tmon.h:54:17: error: field 'tv' has incomplete type
struct timeval tv;
^~
make[3]: *** [<builtin>: tui.o] Error 1
make[2]: *** [Makefile:83: tmon] Error 2
Signed-off-by: Markus Mayer <mmayer@broadcom.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Sumeet Pawnikar <sumeet.r.pawnikar@intel.com>
Acked-by: Alejandro González <alejandro.gonzalez.correo@gmail.com>
Tested-by: Alejandro González <alejandro.gonzalez.correo@gmail.com>
Fixes: 94f69966fa ("tools/thermal: Introduce tmon, a tool for thermal subsystem")
Link: https://lore.kernel.org/r/20220718031040.44714-1-f.fainelli@gmail.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Register thermal zones as hwmon sensors to let userspace read
temperatures using standard hwmon interface.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Link: https://lore.kernel.org/r/20220719054940.755907-2-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Register thermal zones as hwmon sensors to let userspace read
temperatures using standard hwmon interface.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Bhupesh Sharma <bhupesh.sharma@linaro.org>
Link: https://lore.kernel.org/r/20220719054940.755907-1-dmitry.baryshkov@linaro.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
