Paolo Bonzini 0c899c25d7 KVM: x86: do not attempt TSC synchronization on guest writes ... KVM special-cases writes to MSR_IA32_TSC so that all CPUs have the same base for the TSC. This logic is complicated, and we do not want it to have any effect once the VM is started. In particular, if any guest started to synchronize its TSCs with writes to MSR_IA32_TSC rather than MSR_IA32_TSC_ADJUST, the additional effect of kvm_write_tsc code would be uncharted territory. Therefore, this patch makes writes to MSR_IA32_TSC behave essentially the same as writes to MSR_IA32_TSC_ADJUST when they come from the guest. A new selftest (which passes both before and after the patch) checks the current semantics of writes to MSR_IA32_TSC and MSR_IA32_TSC_ADJUST originating from both the host and the guest. Upcoming work to remove the special side effects of host-initiated writes to MSR_IA32_TSC and MSR_IA32_TSC_ADJUST will be able to build onto this test, adjusting the host side to use the new APIs and achieve the same effect. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>		2020-09-28 07:59:52 -04:00
..
android	…
arm64	kselftest: arm64: Remove redundant clean target	2020-06-24 14:25:59 +01:00
bpf	selftests/bpf: Fix massive output from test_maps	2020-08-28 13:58:19 +02:00
breakpoints	selftests: breakpoints: do not use ksft_exit_skip after ksft_set_plan	2020-07-06 15:47:48 -06:00
capabilities	…
cgroup	kselftests: cgroup: add perpcu memory accounting test	2020-08-12 10:57:55 -07:00
clone3	linux-kselftest-5.9-rc1	2020-08-05 10:28:25 -07:00
core	tests: add CLOSE_RANGE_UNSHARE tests	2020-06-17 00:07:38 +02:00
cpu-hotplug	…
cpufreq	…
dmabuf-heaps	kselftests: dmabuf-heaps: Fix confused return value on expected error testing	2020-05-08 09:40:58 -06:00
drivers	selftests: mlxsw: RED: Test offload of trapping on RED qevents	2020-08-03 18:06:46 -07:00
efivarfs	…
exec	selftests/exec: add file type errno tests	2020-08-14 19:56:56 -07:00
filesystems	selftests/binderfs: Fix harness API usage	2020-07-06 15:59:16 -06:00
firmware	selftest/firmware: Add selftest timeout in settings	2020-07-25 12:05:20 +02:00
fpu	selftests/fpu: Add an FPU selftest	2020-06-29 10:02:23 +02:00
ftrace	selftests/ftrace: Support ":README" suffix for requires	2020-06-16 10:42:47 -06:00
futex	…
gpio	…
ia64	…
intel_pstate	…
ipc	…
ir	…
kcmp	…
kexec	…
kmod	selftests: kmod: use variable NAME in kmod_test_0001()	2020-08-12 10:58:01 -07:00
kselftest	Driver core changes for 5.9-rc1	2020-08-05 11:52:17 -07:00
kvm	KVM: x86: do not attempt TSC synchronization on guest writes	2020-09-28 07:59:52 -04:00
lib	lib: make a test module with set/clear bit	2020-06-04 19:06:25 -07:00
livepatch	selftests/livepatch: adopt to newer sysctl error format	2020-07-15 08:54:35 +02:00
lkdtm	lkdtm: Make arch-specific tests always available	2020-06-29 18:41:39 +02:00
locking	…
media_tests	…
membarrier	…
memfd	…
memory-hotplug	…
mincore	selftests: add mincore() tests	2020-08-07 11:33:27 -07:00
mount	…
mqueue	…
net	selftests: disable rp_filter for icmp_redirect.sh	2020-08-17 14:59:24 -07:00
netfilter	selftests: netfilter: add command usage	2020-08-28 20:12:00 +02:00
nsfs	tools/testing: Replace zero-length array with flexible-array	2020-05-08 09:42:14 -06:00
ntb	NTB: ntb_test: Fix bug when counting remote files	2020-06-05 20:02:09 -04:00
openat2	…
pid_namespace	selftests: Remove unneeded selftest API headers	2020-07-06 15:59:07 -06:00
pidfd	linux-kselftest-5.9-rc1	2020-08-05 10:28:25 -07:00
powerpc	selftests/powerpc: Update PROT_SAO test to skip ISA 3.1	2020-08-24 14:12:54 +10:00
prctl	…
proc	…
pstore	pstore/platform: Use backend name for console registration	2020-05-30 10:34:02 -07:00
ptp	testptp: add new options for perout phase and pulse width	2020-07-20 18:04:59 -07:00
ptrace	…
rcutorture	Merge branches 'doc.2020.06.29a', 'fixes.2020.06.29a', 'kfree_rcu.2020.06.29a', 'rcu-tasks.2020.06.29a', 'scale.2020.06.29a', 'srcu.2020.06.29a' and 'torture.2020.06.29a' into HEAD	2020-06-29 12:03:15 -07:00
resctrl	…
rseq	…
rtc	…
safesetid	…
seccomp	Cleanup, SECCOMP_FILTER support, message printing fixes, and other	2020-08-15 18:50:32 -07:00
sigaltstack	selftests: sigaltstack: do not use ksft_exit_skip after ksft_set_plan	2020-07-06 15:57:15 -06:00
size	…
sparc64	…
splice	selftests: splice: Check behavior of full and short splices	2020-08-07 10:50:11 -07:00
static_keys	…
sync	selftests: sync_test: do not use ksft_exit_skip after ksft_set_plan	2020-07-06 15:57:28 -06:00
sysctl	linux-kselftest-5.8-rc1	2020-06-09 10:03:12 -07:00
tc-testing	tc-testing: Add tdc to kselftests	2020-07-20 18:29:37 -07:00
timens	selftests/timens: handle a case when alarm clocks are not supported	2020-05-22 13:29:55 -06:00
timers	…
tmpfs	…
tpm2	selftests: tpm: upgrade TPM2 tests from Python 2 to Python 3	2020-07-06 14:20:35 -06:00
uevent	selftests: Remove unneeded selftest API headers	2020-07-06 15:59:07 -06:00
user	…
vDSO	selftests: vdso: Add a selftest for vDSO getcpu()	2020-05-22 11:05:07 -06:00
vm	mm/migrate: add migrate-shared test for migrate_vma_*()	2020-08-12 10:57:56 -07:00
watchdog	…
wireguard	wireguard: device: avoid circular netns references	2020-06-23 14:50:34 -07:00
x86	Merge branch 'gate-page-refcount' (patches from Dave Hansen)	2020-09-03 18:43:06 -07:00
zram	…
.gitignore	…
Makefile	selftests: add mincore() tests	2020-08-07 11:33:27 -07:00
gen_kselftest_tar.sh	selftests: introduce gen_tar Makefile target	2020-05-19 16:11:46 -06:00
kselftest.h	linux-kselftest-5.9-rc1	2020-08-05 10:28:25 -07:00
kselftest_deps.sh	…
kselftest_harness.h	selftests/harness: Limit step counter reporting	2020-07-17 13:56:35 -06:00
kselftest_install.sh	…
kselftest_module.h	…
lib.mk	selftests: fix condition in run_tests	2020-07-07 14:11:31 -06:00