From: Yang Weijiang <weijiang.yang@intel.com>
To: pbonzini@redhat.com, kvm@vger.kernel.org, mst@redhat.com,
rkrcmar@redhat.com, jmattson@google.com,
linux-kernel@vger.kernel.org, yu-cheng.yu@intel.com
Cc: Yang Weijiang <weijiang.yang@intel.com>,
Zhang Yi Z <yi.z.zhang@linux.intel.com>
Subject: [RFC PATCH v4 3/8] KVM:CPUID: Fix xsaves area size calculation for CPUID.(EAX=0xD,ECX=1).
Date: Mon, 18 Mar 2019 23:03:46 +0800 [thread overview]
Message-ID: <20190318150351.15550-4-weijiang.yang@intel.com> (raw)
In-Reply-To: <20190318150351.15550-1-weijiang.yang@intel.com>
According to latest Software Development Manual vol.2/3.2,
for CPUID.(EAX=0xD,ECX=1), it should report xsaves area size
containing all states enabled by XCR0|IA32_MSR_XSS.
Signed-off-by: Zhang Yi Z <yi.z.zhang@linux.intel.com>
Signed-off-by: Yang Weijiang <weijiang.yang@intel.com>
---
arch/x86/kvm/cpuid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 53abd6019c68..29d6a5cdc746 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -126,7 +126,8 @@ int kvm_update_cpuid(struct kvm_vcpu *vcpu)
best = kvm_find_cpuid_entry(vcpu, 0xD, 1);
if (best && (best->eax & (F(XSAVES) | F(XSAVEC))))
- best->ebx = xstate_required_size(vcpu->arch.xcr0, true);
+ best->ebx = xstate_required_size(vcpu->arch.xcr0 |
+ kvm_supported_xss(), true);
/*
* The existing code assumes virtual address is 48-bit or 57-bit in the
--
2.17.1
next prev parent reply other threads:[~2019-03-19 8:12 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-18 15:03 [RFC PATCH v4 0/8] This patch-set is to enable Guest CET support Yang Weijiang
2019-03-18 15:03 ` [RFC PATCH v4 1/8] KVM:VMX: Define CET VMCS fields and bits Yang Weijiang
2019-04-02 19:57 ` Sean Christopherson
2019-03-18 15:03 ` [RFC PATCH v4 2/8] KVM:CPUID: Add CET CPUID support for Guest Yang Weijiang
2019-04-02 20:21 ` Sean Christopherson
2019-04-02 20:40 ` Sean Christopherson
2019-03-18 15:03 ` Yang Weijiang [this message]
2019-04-02 20:27 ` [RFC PATCH v4 3/8] KVM:CPUID: Fix xsaves area size calculation for CPUID.(EAX=0xD,ECX=1) Sean Christopherson
2019-03-18 15:03 ` [RFC PATCH v4 4/8] KVM:VMX: Pass through host CET related MSRs to Guest Yang Weijiang
2019-04-02 20:27 ` Sean Christopherson
2019-04-02 20:46 ` Yang Weijiang
2019-03-18 15:03 ` [RFC PATCH v4 5/8] KVM:VMX: Load Guest CET via VMCS when CET is enabled in Guest Yang Weijiang
2019-04-02 20:30 ` Sean Christopherson
2019-03-18 15:03 ` [RFC PATCH v4 6/8] KVM:x86: Allow Guest to set supported bits in XSS Yang Weijiang
2019-03-18 15:03 ` [RFC PATCH v4 7/8] KVM:x86: load guest fpu state when accessing MSRs managed by XSAVES Yang Weijiang
2019-04-02 20:39 ` Sean Christopherson
2019-03-18 15:03 ` [RFC PATCH v4 8/8] KVM:x86: Add user-space read/write interface for CET MSRs Yang Weijiang
2019-04-02 20:35 ` Sean Christopherson
2019-03-25 20:45 ` [RFC PATCH v4 0/8] This patch-set is to enable Guest CET support Yang Weijiang
2019-03-26 22:31 ` Sean Christopherson
2019-04-02 20:10 ` Sean Christopherson
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