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Filename Latest commit message Latest commit date
Jim Mattson 6b2875b527 KVM: x86: Mask LVTPC when handling a PMI 
commit a16eb25b09c02a54c1c1b449d4b6cfa2cf3f013a upstream.

Per the SDM, "When the local APIC handles a performance-monitoring
counters interrupt, it automatically sets the mask flag in the LVT
performance counter register."  Add this behavior to KVM's local APIC
emulation.

Failure to mask the LVTPC entry results in spurious PMIs, e.g. when
running Linux as a guest, PMI handlers that do a "late_ack" spew a large
number of "dazed and confused" spurious NMI warnings.

Fixes: f5132b0138 ("KVM: Expose a version 2 architectural PMU to a guests")
Cc: stable@vger.kernel.org
Signed-off-by: Jim Mattson <jmattson@google.com>
Tested-by: Mingwei Zhang <mizhang@google.com>
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20230925173448.3518223-3-mizhang@google.com
[sean: massage changelog, correct Fixes]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-10-25 11:53:21 +02:00
arch KVM: x86: Mask LVTPC when handling a PMI 2023-10-25 11:53:21 +02:00
block block/partition: fix signedness issue for Amiga partitions 2023-07-27 08:37:29 +02:00
certs
crypto X.509: if signature is unsupported skip validation 2023-09-23 10:59:55 +02:00
Documentation Documentation: sysctl: align cells in second content column 2023-10-25 11:53:20 +02:00
drivers regmap: fix NULL deref on lookup 2023-10-25 11:53:21 +02:00
fs ceph: fix incorrect revoked caps assert in ceph_fill_file_size() 2023-10-25 11:53:19 +02:00
include dev_forward_skb: do not scrub skb mark within the same name space 2023-10-25 11:53:20 +02:00
init x86/mm: Initialize text poking earlier 2023-08-08 19:56:36 +02:00
ipc
kernel cgroup: Remove duplicates in cgroup v1 tasks file 2023-10-25 11:53:19 +02:00
lib lib/test_meminit: fix off-by-one error in test_pages() 2023-10-25 11:53:17 +02:00
LICENSES
mm tmpfs: verify {g,u}id mount options correctly 2023-09-23 10:59:40 +02:00
net nfc: nci: fix possible NULL pointer dereference in send_acknowledge() 2023-10-25 11:53:20 +02:00
samples samples/bpf: Fix buffer overflow in tcp_basertt 2023-07-27 08:37:07 +02:00
scripts modpost: add missing else to the "of" check 2023-10-10 21:46:44 +02:00
security ima: rework CONFIG_IMA dependency block 2023-10-10 21:46:46 +02:00
sound ALSA: hda: Disable power save for solving pop issue on Lenovo ThinkCentre M70q 2023-10-10 21:46:41 +02:00
tools cpupower: add Makefile dependencies for install targets 2023-10-10 21:46:45 +02:00
usr
virt KVM: Destroy target device if coalesced MMIO unregistration fails 2023-03-11 16:44:01 +01:00
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS iio: stx104: Move to addac subdirectory 2023-08-30 16:27:12 +02:00
Makefile Linux 5.4.258 2023-10-10 21:46:46 +02:00
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.