From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 17/26] KVM: x86: Handle MPX CPUID adjustment in vendor code
Date: Wed, 29 Jan 2020 15:46:31 -0800 [thread overview]
Message-ID: <20200129234640.8147-18-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20200129234640.8147-1-sean.j.christopherson@intel.com>
Move the MPX CPUID adjustments into vendor code to eliminate an instance
of the undesirable "unsigned f_* = *_supported ? F(*) : 0" pattern in
the common CPUID handling code.
No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
arch/x86/kvm/cpuid.c | 3 +--
arch/x86/kvm/svm.c | 3 +++
arch/x86/kvm/vmx/vmx.c | 14 ++++++++++++--
3 files changed, 16 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 2d75410092e6..aa03dc665a44 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -322,7 +322,6 @@ static int __do_cpuid_func_emulated(struct kvm_cpuid_entry2 *entry,
static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
{
unsigned f_invpcid = kvm_x86_ops->invpcid_supported() ? F(INVPCID) : 0;
- unsigned f_mpx = kvm_mpx_supported() ? F(MPX) : 0;
unsigned f_umip = kvm_x86_ops->umip_emulated() ? F(UMIP) : 0;
unsigned f_intel_pt = kvm_x86_ops->pt_supported() ? F(INTEL_PT) : 0;
unsigned f_la57;
@@ -331,7 +330,7 @@ static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
/* cpuid 7.0.ebx */
const u32 kvm_cpuid_7_0_ebx_x86_features =
F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
- F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) |
+ F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(MPX) | F(RDSEED) |
F(ADX) | F(SMAP) | F(AVX512IFMA) | F(AVX512F) | F(AVX512PF) |
F(AVX512ER) | F(AVX512CD) | F(CLFLUSHOPT) | F(CLWB) | F(AVX512DQ) |
F(SHA_NI) | F(AVX512BW) | F(AVX512VL) | f_intel_pt;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index fee2af01ba21..f64c2c1f9d1f 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -6059,6 +6059,9 @@ static void svm_set_supported_cpuid(struct kvm_cpuid_entry2 *entry)
if (avic)
cpuid_entry_clear(entry, X86_FEATURE_X2APIC);
break;
+ case 0x7:
+ cpuid_entry_clear(entry, X86_FEATURE_MPX);
+ break;
case 0x80000001:
if (nested)
cpuid_entry_set(entry, X86_FEATURE_SVM);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index d21b2eccf3fe..f33bf519690e 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7136,8 +7136,18 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
static void vmx_set_supported_cpuid(struct kvm_cpuid_entry2 *entry)
{
- if (entry->function == 1 && nested)
- entry->ecx |= feature_bit(VMX);
+ switch (entry->function) {
+ case 0x1:
+ if (nested)
+ cpuid_entry_set(entry, X86_FEATURE_VMX);
+ break;
+ case 0x7:
+ if (!kvm_mpx_supported())
+ cpuid_entry_clear(entry, X86_FEATURE_MPX);
+ break;
+ default:
+ break;
+ }
}
static void vmx_request_immediate_exit(struct kvm_vcpu *vcpu)
--
2.24.1
next prev parent reply other threads:[~2020-01-29 23:47 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-29 23:46 [PATCH 00/26] KVM: x86: Purge kvm_x86_ops->*_supported() Sean Christopherson
2020-01-29 23:46 ` [PATCH 01/26] KVM: x86: Remove superfluous brackets from case statement Sean Christopherson
2020-02-05 14:29 ` Vitaly Kuznetsov
2020-02-05 14:32 ` Sean Christopherson
2020-01-29 23:46 ` [PATCH 02/26] KVM: x86: Take an unsigned 32-bit int for has_emulated_msr()'s index Sean Christopherson
2020-02-05 14:30 ` Vitaly Kuznetsov
2020-01-29 23:46 ` [PATCH 03/26] KVM: x86: Snapshot MSR index in a local variable when processing lists Sean Christopherson
2020-02-05 14:31 ` Vitaly Kuznetsov
2020-01-29 23:46 ` [PATCH 04/26] KVM: x86: Add a kvm_x86_ops hook to query virtualized MSR support Sean Christopherson
2020-02-05 14:34 ` Vitaly Kuznetsov
2020-02-05 14:59 ` Sean Christopherson
2020-02-05 15:22 ` Vitaly Kuznetsov
2020-02-05 15:35 ` Sean Christopherson
2020-02-05 16:55 ` Vitaly Kuznetsov
2020-02-05 17:02 ` Sean Christopherson
2020-02-06 12:08 ` Vitaly Kuznetsov
2020-01-29 23:46 ` [PATCH 05/26] KVM: x86: Move MSR_TSC_AUX existence checks into vendor code Sean Christopherson
2020-02-05 14:39 ` Vitaly Kuznetsov
2020-01-29 23:46 ` [PATCH 06/26] KVM: x86: Move MSR_IA32_BNDCFGS " Sean Christopherson
2020-02-05 14:53 ` Vitaly Kuznetsov
2020-01-29 23:46 ` [PATCH 07/26] KVM: VMX: Add helpers to query Intel PT mode Sean Christopherson
2020-01-29 23:46 ` [PATCH 08/26] KVM: x86: Move RTIT (Intel PT) MSR existence checks into vendor code Sean Christopherson
2020-01-29 23:46 ` [PATCH 09/26] KVM: x86: Calculate the supported xcr0 mask at load time Sean Christopherson
2020-01-29 23:46 ` [PATCH 10/26] KVM: x86: Use supported_xcr0 to detect MPX support Sean Christopherson
2020-01-29 23:46 ` [PATCH 11/26] KVM: x86: Make kvm_mpx_supported() an inline function Sean Christopherson
2020-01-29 23:46 ` [PATCH 12/26] KVM: x86: Drop explicit @func param from ->set_supported_cpuid() Sean Christopherson
2020-01-29 23:46 ` [PATCH 13/26] KVM: x86: Use u32 for holding CPUID register value in helpers Sean Christopherson
2020-01-29 23:46 ` [PATCH 14/26] KVM: x86: Introduce cpuid_entry_{get,has}() accessors Sean Christopherson
2020-01-29 23:46 ` [PATCH 15/26] KVM: x86: Introduce cpuid_entry_{change,set,clear}() mutators Sean Christopherson
2020-01-29 23:46 ` [PATCH 16/26] KVM: x86: Add Kconfig-controlled auditing of reverse CPUID lookups Sean Christopherson
2020-01-29 23:46 ` Sean Christopherson [this message]
2020-01-29 23:46 ` [PATCH 18/26] KVM: x86: Handle INVPCID CPUID adjustment in vendor code Sean Christopherson
2020-01-29 23:46 ` [PATCH 19/26] KVM: x86: Handle UMIP emulation CPUID adjustment in VMX code Sean Christopherson
2020-01-29 23:46 ` [PATCH 20/26] KVM: x86: Handle PKU CPUID adjustment in SVM code Sean Christopherson
2020-01-29 23:46 ` [PATCH 21/26] KVM: x86: Handle RDTSCP CPUID adjustment in VMX code Sean Christopherson
2020-01-29 23:46 ` [PATCH 22/26] KVM: x86: Handle XSAVES " Sean Christopherson
2020-01-29 23:46 ` [PATCH 23/26] KVM: x86: Handle Intel PT CPUID adjustment in vendor code Sean Christopherson
2020-01-29 23:46 ` [PATCH 24/26] KVM: x86: Clear output regs for CPUID 0x14 if PT isn't exposed to guest Sean Christopherson
2020-01-29 23:46 ` [PATCH 25/26] KVM: x86: Handle main Intel PT CPUID leaf in vendor code Sean Christopherson
2020-01-30 0:38 ` Sean Christopherson
2020-01-29 23:46 ` [PATCH 26/26] KVM: VMX: Directly query Intel PT mode when refreshing PMUs Sean Christopherson
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