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From: Mingwei Zhang <mizhang@google.com>
To: Sean Christopherson <seanjc@google.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org, linux-kselftest@vger.kernel.org,
	linux-kernel@vger.kernel.org, Mingwei Zhang <mizhang@google.com>,
	Jim Mattson <jmattson@google.com>,
	Venkatesh Srinivas <venkateshs@google.com>,
	Aaron Lewis <aaronlewis@google.com>,
	"Chang S. Bae" <chang.seok.bae@intel.com>
Subject: [PATCH v2 4/7] KVM: selftests: Add the XFD check to IA32_XFD in #NM handler
Date: Tue, 14 Feb 2023 18:46:03 +0000	[thread overview]
Message-ID: <20230214184606.510551-5-mizhang@google.com> (raw)
In-Reply-To: <20230214184606.510551-1-mizhang@google.com>

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 847752998660..44c907215343 100644
--- a/tools/testing/selftests/kvm/x86_64/amx_test.c
+++ b/tools/testing/selftests/kvm/x86_64/amx_test.c
@@ -217,8 +217,10 @@ 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 */
-- 
2.39.1.581.gbfd45094c4-goog


  parent reply	other threads:[~2023-02-14 18:46 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-02-14 18:45 [PATCH v2 0/7] Overhauling amx_test Mingwei Zhang
2023-02-14 18:46 ` [PATCH v2 1/7] KVM: selftests: x86: Add a working xstate data structure Mingwei Zhang
2023-02-19  8:33   ` Chao Gao
2023-02-19 17:56     ` Mingwei Zhang
2023-02-14 18:46 ` [PATCH v2 2/7] KVM: selftests: x86: Fix an error in comment of amx_test Mingwei Zhang
2023-02-19  8:46   ` Chao Gao
2023-02-19 17:58     ` Mingwei Zhang
2023-02-14 18:46 ` [PATCH v2 3/7] KVM: selftests: x86: Add check of CR0.TS in the #NM handler in amx_test Mingwei Zhang
2023-02-17 22:01   ` Aaron Lewis
2023-02-18  0:57     ` Mingwei Zhang
2023-02-14 18:46 ` Mingwei Zhang [this message]
2023-02-14 18:46 ` [PATCH v2 5/7] KVM: selftests: Fix the checks to XFD_ERR using and operation Mingwei Zhang
2023-02-14 18:46 ` [PATCH v2 6/7] KVM: selftests: x86: Enable checking on xcomp_bv in amx_test Mingwei Zhang
2023-02-14 18:46 ` [PATCH v2 7/7] KVM: selftests: x86: Repeat the checking of xheader when IA32_XFD[XTILEDATA] is set " Mingwei Zhang
2023-02-17 22:04 ` [PATCH v2 0/7] Overhauling amx_test Aaron Lewis
2023-02-18  0:58   ` Mingwei Zhang

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