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Subject[PATCH v3 05/13] KVM: selftests: x86: Add check of CR0.TS in the #NM handler in amx_test
From
Add check of CR0.TS[bit 3] before the check of IA32_XFD_ERR in the #NM
handler in amx_test. This is because XFD may not be the only reason of
the IA32_XFD MSR and the bitmap corresponding to the state components
required by the faulting instruction." (Intel SDM vol 1. Section 13.14)

Add the missing check of CR0.TS.

Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
tools/testing/selftests/kvm/x86_64/amx_test.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index ba8c0afdbac8..ac49b14460b6 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) == 0);
GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA);
GUEST_SYNC(8);
GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA);
--
2.39.2.637.g21b0678d19-goog
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