lkml.org 
[lkml]   [2023]   [Feb]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
Subject[PATCH v3 06/13] KVM: selftests: x86: Add the XFD check to IA32_XFD in #NM handler
From
Add an extra check to IA32_XFD to ensure the behavior is consistent with
the AMX archtecture. In addition, repeat the checks across context switch
to ensure the values of IA32_XFD and IA32_XFD_ERR are well preserved.

Signed-off-by: Mingwei Zhang <mizhang@google.com>
---
tools/testing/selftests/kvm/x86_64/amx_test.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/tools/testing/selftests/kvm/x86_64/amx_test.c b/tools/testing/selftests/kvm/x86_64/amx_test.c
index ac49b14460b6..296c954dfd6d 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -218,8 +218,10 @@ void guest_nm_handler(struct ex_regs *regs)
GUEST_SYNC(7);
GUEST_ASSERT((get_cr0() & X86_CR0_TS) == 0);
GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA);
+ GUEST_ASSERT(rdmsr(MSR_IA32_XFD) & XFEATURE_MASK_XTILEDATA);
GUEST_SYNC(8);
GUEST_ASSERT(rdmsr(MSR_IA32_XFD_ERR) == XFEATURE_MASK_XTILEDATA);
+ GUEST_ASSERT(rdmsr(MSR_IA32_XFD) & XFEATURE_MASK_XTILEDATA);
/* Clear xfd_err */
wrmsr(MSR_IA32_XFD_ERR, 0);
/* xfd=0, enable amx */
--
2.39.2.637.g21b0678d19-goog
\
 
 \ /
  Last update: 2023-03-27 00:30    [W:0.210 / U:0.328 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site