The recently added DT support for the ac97 driver is causing
a gcc warning:
sound/atmel/ac97c.c: In function 'atmel_ac97c_probe_dt':
sound/atmel/ac97c.c:919:29: warning: unused variable 'match' [-Wunused-variable]
const struct of_device_id *match;
The variable is clearly unused, so we can remove it.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Alexander Stein <alexanders83@web.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The file is moved to hda core and renamed to hdac_i915.c, so can be used
by both legacy HDA driver and new Skylake audio driver.
- Add snd_hdac_ prefix to the public APIs.
- The i915 audio component is moved to core bus and dynamically allocated.
- A static pointer hdac_acomp is used to help bind/unbind callbacks to get
this component, because the sound card's private_data is used by the azx
chip pointer, which is a legacy structure. It could be removed if private
_data changes to some core structure which can be extended to find the
bus.
- snd_hdac_get_display_clk() is added to get the display core clock for
HSW/BDW.
- haswell_set_bclk() is moved to hda_intel.c because it needs to write the
controller registers EM4/EM5, and only legacy HD-A needs it for HSW/BDW.
- Move definition of HSW/BDW-specific registers EM4/EM5 to hda_register.h
and rename them to HSW_EM4/HSW_EM5, because other HD-A controllers have
different layout for the extended mode registers.
Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
The variable init (struct clk_init_data) is allocated on the stack.
We weren't initializing the .flags field, so it contains random junk,
which can cause all kinds of interesting issues when the flags are
parsed by clk_register.
Signed-off-by: Ricky Liang <jcliang@chromium.org>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
If while setting a block group read-only we end up allocating a system
chunk, through check_system_chunk(), we were not doing it while holding
the chunk mutex which is a problem if a concurrent chunk allocation is
happening, through do_chunk_alloc(), as it means both block groups can
end up using the same logical addresses and physical regions in the
device(s). So make sure we hold the chunk mutex.
Cc: stable@vger.kernel.org # 4.0+
Fixes: 2f0810880f ("btrfs: delete chunk allocation attemp when
setting block group ro")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
btrfs_check_shared() is leaking a return value of '1' from
find_parent_nodes(). As a result, callers (in this case, extent_fiemap())
are told extents are shared when they are not. This in turn broke fiemap on
btrfs for kernels v3.18 and up.
The fix is simple - we just have to clear 'ret' after we are done processing
the results of find_parent_nodes().
It wasn't clear to me at first what was happening with return values in
btrfs_check_shared() and find_parent_nodes() - thanks to Josef for the help
on irc. I added documentation to both functions to make things more clear
for the next hacker who might come across them.
If we could queue this up for -stable too that would be great.
Signed-off-by: Mark Fasheh <mfasheh@suse.de>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Chris Mason <clm@fb.com>
Since 39b2bbe3d7 (gpio: add flags argument to gpiod_get*() functions)
which appeared in v3.17-rc1, the gpiod_get* functions take an additional
parameter that allows to specify direction and initial value for output.
Without this patch there is no call to gpiod_direction_input but the
gpio is used for irq reporting and for that the line should be in input
mode.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
The commit 8170a83f15 ("powerpc: Wireup the kcmp syscall to sys_ni") has
disabled the kcmp syscall for powerpc. This has been done due to the use
of unsigned long parameters which may require a dedicated wrapper to handle
32bit process on top of 64bit kernel. However in the kcmp() case, the 2
unsigned long parameters are currently only used to carry file descriptors
from user space to the kernel. Since such a parameter is passed through
register, and file descriptor doesn't need to get extended, there is,
today, no need for a wrapper.
In the case there will be a need to pass address in or out of this system
call, then a wrapper could be required, it will then be to care of it.
As today this is not the case, it is safe to enable kcmp() on powerpc.
Tested (by Laurent) on 64-bit, 32-bit, and 32-bit userspace on 64-bit
kernel using tools/testing/selftests/kcmp [mpe].
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Turns out we can automate the handling for the device_may_wakeup()
quite a bit by using the kernel wakeup source list as suggested
by Rafael J. Wysocki <rjw@rjwysocki.net>.
And as some hardware has separate dedicated wake-up interrupt
in addition to the IO interrupt, we can automate the handling by
adding a generic threaded interrupt handler that just calls the
device PM runtime to wake up the device.
This allows dropping code from device drivers as we currently
are doing it in multiple ways, and often wrong.
For most drivers, we should be able to drop the following
boilerplate code from runtime_suspend and runtime_resume
functions:
...
device_init_wakeup(dev, true);
...
if (device_may_wakeup(dev))
enable_irq_wake(irq);
...
if (device_may_wakeup(dev))
disable_irq_wake(irq);
...
device_init_wakeup(dev, false);
...
We can replace it with just the following init and exit
time code:
...
device_init_wakeup(dev, true);
dev_pm_set_wake_irq(dev, irq);
...
dev_pm_clear_wake_irq(dev);
device_init_wakeup(dev, false);
...
And for hardware with dedicated wake-up interrupts:
...
device_init_wakeup(dev, true);
dev_pm_set_dedicated_wake_irq(dev, irq);
...
dev_pm_clear_wake_irq(dev);
device_init_wakeup(dev, false);
...
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
If we don't update last_busy in rpm_resume, devices can go back
to sleep immediately after resume. This happens at least in
cases where the device has been powered off and does not have
any interrupt pending until there's something in the FIFO.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
In commit 02730d3c05
(Merge 4.1-rc4 into tty-next), git mismerged some lines,
reintroducing a reference to the removed field
uart_amba_port.tx_irq_seen. This causes a build failure.
This patch removes the mismerged lines, restoring the code to what
was in tty-next (which was the intention).
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Summary:
- Use generic function to get buffer count instead of specific one.
In case of Exynos DRM, There was a special case which decides pixel
format of a given buffer according to planer types, which is NV12M and NV12.
However, NV12M doesn't exist in drm fourcc so it removes
exynos_drm_format_num_buffers() specific to Exynos DRM and use a generic function,
drm_format_num_planes() instead.
- Allow mixer driver to support NV21 format for Video processor.
This format was already supported but we just missed DRM_FORMAT_NV21 case
so this patch considers the case so that Mixer driver can handle it correctly.
- Add regression fix and some code cleanups.
* 'exynos-drm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm/exynos: dp: Lower level of EDID read success message
drm/exynos: cleanup exynos_drm_plane
drm/exynos: 'win' is always unsigned
drm/exynos: mixer: don't dump registers under spinlock
drm/exynos: Consolidate return statements in fimd_bind()
drm/exynos: Constify exynos_drm_crtc_ops
drm/exynos: Fix build breakage on !DRM_EXYNOS_FIMD
drm/exynos: mixer: Constify platform_device_id
drm/exynos: mixer: cleanup pixelformat handling
drm/exynos: mixer: also allow NV21 for the video processor
drm/exynos: mixer: remove buffer count handling in vp_video_buffer()
drm/exynos: plane: honor buffer offset for dma_addr
drm/exynos: fb: use drm_format_num_planes to get buffer count
- Add the interrupts & events modules, including new IOCTLs to create and wait
on events. The HSA RT open source stack is mainly using events to know when
a dispatched work has been completed. In addition, this module is
a pre-requisite for the next module I'm going to upstream - debugger support
This module also handles H/W exceptions, such as memory exception received
through the IOMMUv2 H/W and Bad Opcode exception receieved from the GPU.
- Adding a new kernel module parameter to let the user decide whether he wants
to receive a SIGTERM when a memory exception occurs inside the GPU kernel and
the HSA application doesn't wait on an appropriate event, or if he just want
to receive notification about this event in dmesg. The default is the latter.
- Additional improvements for SDMA code
- Update my email address in Maintainers file.
* tag 'drm-amdkfd-next-2015-05-19' of git://people.freedesktop.org/~gabbayo/linux:
drm/amdkfd: change driver version to 0.7.2
drm/amdkfd: Implement events IOCTLs
drm/amdkfd: Add module parameter of send_sigterm
drm/amdkfd: Add bad opcode exception handling
drm/amdkfd: Add memory exception handling
drm/amdkfd: Add the events module
drm/amdkfd: add events IOCTL set definitions
drm/amdkfd: Add interrupt handling module
drm/radeon: Add init interrupt kfd->kgd interface
MAINTAINERS: update amdkfd Oded's email address
drm/amdkfd: make the sdma vm init to be asic specific
drm/amdkfd: Use new struct for asic specific ops
drm/amdkfd: reformat some debug prints
drm/amdkfd: Remove unessary void pointer cast
Scattering of random drm core patches. Bunch of atomic prep work too, but
the final bits for blob properties, atomic modesets and lifting the
experimental tag on the atomic ioctl are still blocked on Daniel Stone
finalizing and testing the weston support for it. I hope that we can get
it all ready for 4.2 though.
* tag 'topic/drm-misc-2015-05-19' of git://anongit.freedesktop.org/drm-intel: (22 commits)
drm/atomic: Allow drivers to subclass drm_atomic_state, v3
drm/atomic: remove duplicated assignment of old_plane_state
drm/dp: Fix comment in DP helper
drm/atomic: add drm_atomic_get_existing_*_state helpers
drm/core: get rid of -Iinclude/drm
drm/i915: get rid of -Iinclude/drm
drm/atomic-helpers: Export drm_atomic_helper_update_legacy_modeset_state
drm/atomic-helpers: Update vblank timestamping constants
drm/sysfs: remove unnecessary connector type checks
drm/sysfs: split DVI-I and TV-out attributes
drm/sysfs: make optional attribute groups per connector type
drm/sysfs: add a helper for extracting connector type from kobject
drm/edid: Add CEA modes before inferred modes
drm/prime: Allow internal imports without import_sg_table
drm: Add reference counting to blob properties
drm: Introduce blob_lock
drm: Introduce helper for replacing blob properties
drm: Don't leak path blob property when updating
drm/atomic: Don't open-code CRTC state destroy
drm/edid: Add DMT modes with ID > 0x50
...
Once upon a time, iscsit_get_tpg() was using an un-interruptible
lock. The signal_pending() usage was a check to allow userspace
to break out of the operation with SIGINT.
AFAICT, there's no reason why this is necessary anymore, and as
reported by Alexey can be potentially dangerous. Also, go ahead
and drop the other two problematic cases within iscsit_access_np()
and sbc_compare_and_write() as well.
Found by Linux Driver Verification project (linuxtesting.org).
Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
klp_for_each_object and klp_for_each_func are now used all over the
code. One need not think what is the proper condition to check in the
for loop now.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Make kobj variable (of type struct kobject) statically allocated in
klp_object structure. It will allow us to move in the func-object-patch
hierarchy through kobject links.
The only reason to have it dynamic was to not have empty release
callback in the code. However we have empty callbacks for function and
patch in the code now, so it is no longer valid and the advantage of
static allocation is clear.
Signed-off-by: Miroslav Benes <mbenes@suse.cz>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Current modification to attrs via sysfs is not fully synchronized.
Process A (change cpumask) | Process B (change numa affinity)
wq_cpumask_store() |
wq_sysfs_prep_attrs() |
| apply_workqueue_attrs()
apply_workqueue_attrs() |
It results that the Process B's operation is totally reverted
without any notification, it is a buggy behavior. So this patch
moves wq_sysfs_prep_attrs() into the protection under wq_pool_mutex
to ensure attrs changes are properly synchronized.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
Applying attrs requires two locks: get_online_cpus() and wq_pool_mutex,
and this code is duplicated at two places (apply_workqueue_attrs() and
workqueue_set_unbound_cpumask()). So we separate out this locking
code into apply_wqattrs_[un]lock() and do a minor refactor on
apply_workqueue_attrs().
The apply_wqattrs_[un]lock() will be also used on later patch for
ensuring attrs changes are properly synchronized.
tj: minor updates to comments
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
ip_do_nat() function was removed prior to kernel 3.4. Remove the
unnecessary function prototype as well.
Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Andy Zhou <azhou@nicira.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This work as a follow-up of commit f7b3bec6f5 ("net: allow setting ecn
via routing table") and adds RFC3168 section 6.1.1.1. fallback for outgoing
ECN connections. In other words, this work adds a retry with a non-ECN
setup SYN packet, as suggested from the RFC on the first timeout:
[...] A host that receives no reply to an ECN-setup SYN within the
normal SYN retransmission timeout interval MAY resend the SYN and
any subsequent SYN retransmissions with CWR and ECE cleared. [...]
Schematic client-side view when assuming the server is in tcp_ecn=2 mode,
that is, Linux default since 2009 via commit 255cac91c3 ("tcp: extend
ECN sysctl to allow server-side only ECN"):
1) Normal ECN-capable path:
SYN ECE CWR ----->
<----- SYN ACK ECE
ACK ----->
2) Path with broken middlebox, when client has fallback:
SYN ECE CWR ----X crappy middlebox drops packet
(timeout, rtx)
SYN ----->
<----- SYN ACK
ACK ----->
In case we would not have the fallback implemented, the middlebox drop
point would basically end up as:
SYN ECE CWR ----X crappy middlebox drops packet
(timeout, rtx)
SYN ECE CWR ----X crappy middlebox drops packet
(timeout, rtx)
SYN ECE CWR ----X crappy middlebox drops packet
(timeout, rtx)
In any case, it's rather a smaller percentage of sites where there would
occur such additional setup latency: it was found in end of 2014 that ~56%
of IPv4 and 65% of IPv6 servers of Alexa 1 million list would negotiate
ECN (aka tcp_ecn=2 default), 0.42% of these webservers will fail to connect
when trying to negotiate with ECN (tcp_ecn=1) due to timeouts, which the
fallback would mitigate with a slight latency trade-off. Recent related
paper on this topic:
Brian Trammell, Mirja Kühlewind, Damiano Boppart, Iain Learmonth,
Gorry Fairhurst, and Richard Scheffenegger:
"Enabling Internet-Wide Deployment of Explicit Congestion Notification."
Proc. PAM 2015, New York.
http://ecn.ethz.ch/ecn-pam15.pdf
Thus, when net.ipv4.tcp_ecn=1 is being set, the patch will perform RFC3168,
section 6.1.1.1. fallback on timeout. For users explicitly not wanting this
which can be in DC use case, we add a net.ipv4.tcp_ecn_fallback knob that
allows for disabling the fallback.
tp->ecn_flags are not being cleared in tcp_ecn_clear_syn() on output, but
rather we let tcp_ecn_rcv_synack() take that over on input path in case a
SYN ACK ECE was delayed. Thus a spurious SYN retransmission will not prevent
ECN being negotiated eventually in that case.
Reference: https://www.ietf.org/proceedings/92/slides/slides-92-iccrg-1.pdf
Reference: https://www.ietf.org/proceedings/89/slides/slides-89-tsvarea-1.pdf
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mirja Kühlewind <mirja.kuehlewind@tik.ee.ethz.ch>
Signed-off-by: Brian Trammell <trammell@tik.ee.ethz.ch>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Dave That <dave.taht@gmail.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Hariprasad Shenai says:
====================
cxgb4: Remove dead code and replace byte-oder functions
This series removes dead fn t4_read_edc and t4_read_mc, also replaces
ntoh{s,l} and hton{s,l} calls with the generic byteorder.
PATCH 2/2 was sent as a single PATCH, but had some byte-ordering issues
in t4_read_edc and t4_read_mc function. Found that t4_read_edc and
t4_read_mc is unused, so PATCH 1/2 is added to remove it.
This patch series is created against net-next tree and includes
patches on cxgb4 driver.
We have included all the maintainers of respective drivers. Kindly review
the change and let us know in case of any review comments.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
replace ntoh{s,l} and hton{s,l} calls with the generic byteorder in
cxgb4/t4_hw.c file
Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
problem that leads to dropped frames.
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Merge tag 'mac80211-for-davem-2015-05-19' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211
Johannes Berg says:
====================
This has just a single fix, for a WEP tailroom check
problem that leads to dropped frames.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
* LED throughput trigger was crashing
* fast-xmit wasn't treating QoS changes in IBSS correctly
* TDLS could use the wrong channel definition
* using a reserved channel context could use the wrong channel width
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Merge tag 'mac80211-next-for-davem-2015-05-19' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211-next
Johannes Berg says:
====================
This just has a few fixes:
* LED throughput trigger was crashing
* fast-xmit wasn't treating QoS changes in IBSS correctly
* TDLS could use the wrong channel definition
* using a reserved channel context could use the wrong channel width
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The hwmon interface in the be2net driver causes a link error when
be2net is built-in while the hwmon subsystem is a loadable module:
drivers/built-in.o: In function `be_probe':
drivers/net/ethernet/emulex/benet/be_main.c:5761: undefined reference to `devm_hwmon_device_register_with_groups'
This adds a new Kconfig symbol, following the example of multiple
other drivers that have the same problem. The new CONFIG_BE2NET_HWMON
will not be available when (BE2NET=y && HWMON=m) to avoid this
problem.
We have to also mark be_hwmon_show_temp as 'static' to ensure the
compiler can optimize out all the unused code.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 29e9122b3a ("be2net: Export board temperature using hwmon-sysfs interface.")
Signed-off-by: David S. Miller <davem@davemloft.net>
After sending the new data packets to probe (step 2), F-RTO may
incorrectly send more probes if the next ACK advances SND_UNA and
does not sack new packet. However F-RTO RFC 5682 probes at most
once. This bug may cause sender to always send new data instead of
repairing holes, inducing longer HoL blocking on the receiver for
the application.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Undo based on TCP timestamps should only happen on ACKs that advance
SND_UNA, according to the Eifel algorithm in RFC 3522:
Section 3.2:
(4) If the value of the Timestamp Echo Reply field of the
acceptable ACK's Timestamps option is smaller than the
value of RetransmitTS, then proceed to step (5),
Section Terminology:
We use the term 'acceptable ACK' as defined in [RFC793]. That is an
ACK that acknowledges previously unacknowledged data.
This is because upon receiving an out-of-order packet, the receiver
returns the last timestamp that advances RCV_NXT, not the current
timestamp of the packet in the DUPACK. Without checking the flag,
the DUPACK will cause tcp_packet_delayed() to return true and
tcp_try_undo_loss() will revert cwnd reduction.
Note that we check the condition in CA_Recovery already by only
calling tcp_try_undo_partial() if FLAG_SND_UNA_ADVANCED is set or
tcp_try_undo_recovery() if snd_una crosses high_seq.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit <5cf3d46192> ("udp: Simplify__udp*_lib_mcast_deliver")
simplified the filter for incoming IPv6 multicast but removed
the check of the local socket address and the UDP destination
address.
This patch restores the filter to prevent sockets bound to a IPv6
multicast IP to receive other UDP traffic link unicast.
Signed-off-by: Henning Rogge <hrogge@gmail.com>
Fixes: 5cf3d46192 ("udp: Simplify__udp*_lib_mcast_deliver")
Cc: "David S. Miller" <davem@davemloft.net>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Currently the getsockopt() requesting the cached contents of the syn
packet headers will fail silently if the caller uses a buffer that is
too small to contain the requested data. Rather than fail silently and
discard the headers, getsockopt() should return an error and report the
required size to hold the data.
Signed-off-by: Eric B Munson <emunson@akamai.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
To help debug legacy SMP crypto functions add debug logs of the
various values involved.
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
A non-percpu VIRQ (e.g., VIRQ_CONSOLE) may be freed on a different
VCPU than it is bound to. This can result in a race between
handle_percpu_irq() and removing the action in __free_irq() because
handle_percpu_irq() does not take desc->lock. The interrupt handler
sees a NULL action and oopses.
Only use the percpu chip/handler for per-CPU VIRQs (like VIRQ_TIMER).
# cat /proc/interrupts | grep virq
40: 87246 0 xen-percpu-virq timer0
44: 0 0 xen-percpu-virq debug0
47: 0 20995 xen-percpu-virq timer1
51: 0 0 xen-percpu-virq debug1
69: 0 0 xen-dyn-virq xen-pcpu
74: 0 0 xen-dyn-virq mce
75: 29 0 xen-dyn-virq hvc_console
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: <stable@vger.kernel.org>
gfn_to_pfn_async is used in just one place, and because of x86-specific
treatment that place will need to look at the memory slot. Hence inline
it into try_async_pf and export __gfn_to_pfn_memslot.
The patch also switches the subsequent call to gfn_to_pfn_prot to use
__gfn_to_pfn_memslot. This is a small optimization. Finally, remove
the now-unused async argument of __gfn_to_pfn.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The argument to KVM_GET_DIRTY_LOG is a memslot id; it may not match the
position in the memslots array, which is sorted by gfn.
Cc: stable@vger.kernel.org
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CR0.CD and CR0.NW are not used by shadow page table so that need
not adjust mmu if these two bit are changed
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Currently, whenever guest MTRR registers are changed
kvm_mmu_reset_context is called to switch to the new root shadow page
table, however, it's useless since:
1) the cache type is not cached into shadow page's attribute so that
the original root shadow page will be reused
2) the cache type is set on the last spte, that means we should sync
the last sptes when MTRR is changed
This patch fixs this issue by drop all the spte in the gfn range which
is being updated by MTRR
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There are some bugs in current get_mtrr_type();
1: bit 1 of mtrr_state->enabled is corresponding bit 11 of
IA32_MTRR_DEF_TYPE MSR which completely control MTRR's enablement
that means other bits are ignored if it is cleared
2: the fixed MTRR ranges are controlled by bit 0 of
mtrr_state->enabled (bit 10 of IA32_MTRR_DEF_TYPE)
3: if MTRR is disabled, UC is applied to all of physical memory rather
than mtrr_state->def_type
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Reviewed-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Split kvm_unmap_rmapp and introduce kvm_zap_rmapp which will be used in the
later patch
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
slot_handle_level and its helper functions are ready now, use them to
clean up the code
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There are several places walking all rmaps for the memslot so that
introduce common functions to cleanup the code
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
It's used to abstract the code from kvm_handle_hva_range and it will be
used by later patch
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
It's used to walk all the sptes on the rmap to clean up the
code
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This reverts commit ff7bbb9c6a.
Sasha Levin is seeing odd jump in time values during boot of a KVM guest:
[...]
[ 0.000000] tsc: Detected 2260.998 MHz processor
[3376355.247558] Calibrating delay loop (skipped) preset value..
[...]
and bisected them to this commit.
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM may turn a user page to a kernel page when kernel writes a readonly
user page if CR0.WP = 1. This shadow page entry will be reused after
SMAP is enabled so that kernel is allowed to access this user page
Fix it by setting SMAP && !CR0.WP into shadow page's role and reset mmu
once CR4.SMAP is updated
Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When a REP-string is executed in 64-bit mode with an address-size prefix,
ECX/EDI/ESI are used as counter and pointers. When ECX is initially zero, Intel
CPUs clear the high 32-bits of RCX, and recent Intel CPUs update the high bits
of the pointers in MOVS/STOS. This behavior is specific to Intel according to
few experiments.
As one may guess, this is an undocumented behavior. Yet, it is observable in
the guest, since at least VMX traps REP-INS/OUTS even when ECX=0. Note that
VMware appears to get it right. The behavior can be observed using the
following code:
#include <stdio.h>
#define LOW_MASK (0xffffffff00000000ull)
#define ALL_MASK (0xffffffffffffffffull)
#define TEST(opcode) \
do { \
asm volatile(".byte 0xf2 \n\t .byte 0x67 \n\t .byte " opcode "\n\t" \
: "=S"(s), "=c"(c), "=D"(d) \
: "S"(ALL_MASK), "c"(LOW_MASK), "D"(ALL_MASK)); \
printf("opcode %s rcx=%llx rsi=%llx rdi=%llx\n", \
opcode, c, s, d); \
} while(0)
void main()
{
unsigned long long s, d, c;
iopl(3);
TEST("0x6c");
TEST("0x6d");
TEST("0x6e");
TEST("0x6f");
TEST("0xa4");
TEST("0xa5");
TEST("0xa6");
TEST("0xa7");
TEST("0xaa");
TEST("0xab");
TEST("0xae");
TEST("0xaf");
}
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
When REP-string instruction is preceded with an address-size prefix,
ECX/EDI/ESI are used as the operation counter and pointers. When they are
updated, the high 32-bits of RCX/RDI/RSI are cleared, similarly to the way they
are updated on every 32-bit register operation. Fix it.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
If the host sets hardware breakpoints to debug the guest, and a task-switch
occurs in the guest, the architectural DR7 will not be updated. The effective
DR7 would be updated instead.
This fix puts the DR7 update during task-switch emulation, so it now uses the
standard DR setting mechanism instead of the one that was previously used. As a
bonus, the update of DR7 will now be effective for AMD as well.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
