A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-10 14:19:09 -04:00
Code Issues Projects Releases Packages Wiki Activity
No description
904,230 commits 10 branches 0 tags 2.1 GiB
  • C 98.2%
  • Assembly 1%
  • Makefile 0.3%
  • Shell 0.2%
  • Python 0.1%
Find a file
Repository files (latest commit first)
Filename Latest commit message Latest commit date
Maciej S. Szmigiero 3aa9dae33a KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active 
[ Upstream commit d02e48830e3fce9701265f6c5a58d9bdaf906a76 ]

Commit 3bbf3565f4 ("svm: Do not intercept CR8 when enable AVIC")
inhibited pre-VMRUN sync of TPR from LAPIC into VMCB::V_TPR in
sync_lapic_to_cr8() when AVIC is active.

AVIC does automatically sync between these two fields, however it does
so only on explicit guest writes to one of these fields, not on a bare
VMRUN.

This meant that when AVIC is enabled host changes to TPR in the LAPIC
state might not get automatically copied into the V_TPR field of VMCB.

This is especially true when it is the userspace setting LAPIC state via
KVM_SET_LAPIC ioctl() since userspace does not have access to the guest
VMCB.

Practice shows that it is the V_TPR that is actually used by the AVIC to
decide whether to issue pending interrupts to the CPU (not TPR in TASKPRI),
so any leftover value in V_TPR will cause serious interrupt delivery issues
in the guest when AVIC is enabled.

Fix this issue by doing pre-VMRUN TPR sync from LAPIC into VMCB::V_TPR
even when AVIC is enabled.

Fixes: 3bbf3565f4 ("svm: Do not intercept CR8 when enable AVIC")
Cc: stable@vger.kernel.org
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Reviewed-by: Naveen N Rao (AMD) <naveen@kernel.org>
Link: https://lore.kernel.org/r/c231be64280b1461e854e1ce3595d70cde3a2e9d.1756139678.git.maciej.szmigiero@oracle.com
[sean: tag for stable@]
Signed-off-by: Sean Christopherson <seanjc@google.com>
[ Adjust context ]
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-10-02 13:34:32 +02:00
arch KVM: SVM: Sync TPR from LAPIC into VMCB::V_TPR even if AVIC is active 2025-10-02 13:34:32 +02:00
block
certs
crypto
Documentation
drivers serial: sc16is7xx: fix bug in flow control levels init 2025-10-02 13:34:32 +02:00
fs nilfs2: fix CFI failure when accessing /sys/fs/nilfs2/features/* 2025-10-02 13:34:31 +02:00
include genirq: Provide new interfaces for affinity hints 2025-10-02 13:34:29 +02:00
init
ipc
kernel cgroup: split cgroup_destroy_wq into 3 workqueues 2025-10-02 13:34:30 +02:00
lib
LICENSES
mm mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory 2025-10-02 13:34:30 +02:00
net net: rfkill: gpio: Fix crash due to dereferencering uninitialized pointer 2025-10-02 13:34:32 +02:00
samples
scripts
security
sound ASoC: SOF: Intel: hda-stream: Fix incorrect variable used in error message 2025-10-02 13:34:31 +02:00
tools
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS
Makefile
README

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.