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| author | Mingwei Zhang <mizhang@google.com> | 2023-02-21 16:36:47 +0000 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2023-03-24 14:21:37 -0700 |
| commit | 0aeb9729486a32fab168114b00006b2643aa8a41 (patch) | |
| tree | 67068f3c807858093912d22aa8c7268b59ab6c74 /tools | |
| parent | 48ad4222c43ceb5ce303758ff26e1d8c881502ac (diff) | |
| download | linux-stable-0aeb9729486a32fab168114b00006b2643aa8a41.tar.gz linux-stable-0aeb9729486a32fab168114b00006b2643aa8a41.tar.bz2 linux-stable-0aeb9729486a32fab168114b00006b2643aa8a41.zip | |
KVM: selftests: Add check of CR0.TS in the #NM handler in amx_test
Be extra paranoid and assert that CR0.TS is clear when verifying the #NM
in the AMX test is due to the expected XFeature Disable error, i.e. that
the #NM isn't due to CR0.TS=1.
Signed-off-by: Mingwei Zhang <mizhang@google.com>
Link: https://lore.kernel.org/r/20230221163655.920289-6-mizhang@google.com
[sean: reword changelog to make it clear this is pure paranoia]
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/testing/selftests/kvm/x86_64/amx_test.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c index 34cf6f253c13..95a30611e03e 100644 --- a/tools/testing/selftests/kvm/x86_64/amx_test.c +++ b/tools/testing/selftests/kvm/x86_64/amx_test.c @@ -216,6 +216,7 @@ void guest_nm_handler(struct ex_regs *regs) { /* Check if #NM is triggered by XFEATURE_MASK_XTILEDATA */ GUEST_SYNC(7); + GUEST_ASSERT(!(get_cr0() & X86_CR0_TS)); GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA); GUEST_SYNC(8); GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA); |