From: Chao Gao <chao.gao@intel.com>
To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org
Cc: mlevitsk@redhat.com, rick.p.edgecombe@intel.com,
weijiang.yang@intel.com, xin@zytor.com,
Sean Christopherson <seanjc@google.com>,
Chao Gao <chao.gao@intel.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH v12 02/24] KVM: x86: Use double-underscore read/write MSR helpers as appropriate
Date: Mon, 11 Aug 2025 19:55:10 -0700 [thread overview]
Message-ID: <20250812025606.74625-3-chao.gao@intel.com> (raw)
In-Reply-To: <20250812025606.74625-1-chao.gao@intel.com>
From: Sean Christopherson <seanjc@google.com>
Use the double-underscore helpers for emulating MSR reads and writes in
he no-underscore versions to better capture the relationship between the
two sets of APIs (the double-underscore versions don't honor userspace MSR
filters).
No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Chao Gao <chao.gao@intel.com>
---
arch/x86/kvm/x86.c | 29 ++++++++++++++++-------------
1 file changed, 16 insertions(+), 13 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 09b106a5afdf..65c787bcfe8b 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1932,11 +1932,24 @@ static int kvm_get_msr_ignored_check(struct kvm_vcpu *vcpu,
__kvm_get_msr);
}
+int __kvm_emulate_msr_read(struct kvm_vcpu *vcpu, u32 index, u64 *data)
+{
+ return kvm_get_msr_ignored_check(vcpu, index, data, false);
+}
+EXPORT_SYMBOL_GPL(__kvm_emulate_msr_read);
+
+int __kvm_emulate_msr_write(struct kvm_vcpu *vcpu, u32 index, u64 data)
+{
+ return kvm_set_msr_ignored_check(vcpu, index, data, false);
+}
+EXPORT_SYMBOL_GPL(__kvm_emulate_msr_write);
+
int kvm_emulate_msr_read(struct kvm_vcpu *vcpu, u32 index, u64 *data)
{
if (!kvm_msr_allowed(vcpu, index, KVM_MSR_FILTER_READ))
return KVM_MSR_RET_FILTERED;
- return kvm_get_msr_ignored_check(vcpu, index, data, false);
+
+ return __kvm_emulate_msr_read(vcpu, index, data);
}
EXPORT_SYMBOL_GPL(kvm_emulate_msr_read);
@@ -1944,21 +1957,11 @@ int kvm_emulate_msr_write(struct kvm_vcpu *vcpu, u32 index, u64 data)
{
if (!kvm_msr_allowed(vcpu, index, KVM_MSR_FILTER_WRITE))
return KVM_MSR_RET_FILTERED;
- return kvm_set_msr_ignored_check(vcpu, index, data, false);
-}
-EXPORT_SYMBOL_GPL(kvm_emulate_msr_write);
-int __kvm_emulate_msr_read(struct kvm_vcpu *vcpu, u32 index, u64 *data)
-{
- return kvm_get_msr_ignored_check(vcpu, index, data, false);
+ return __kvm_emulate_msr_write(vcpu, index, data);
}
-EXPORT_SYMBOL_GPL(__kvm_emulate_msr_read);
+EXPORT_SYMBOL_GPL(kvm_emulate_msr_write);
-int __kvm_emulate_msr_write(struct kvm_vcpu *vcpu, u32 index, u64 data)
-{
- return kvm_set_msr_ignored_check(vcpu, index, data, false);
-}
-EXPORT_SYMBOL_GPL(__kvm_emulate_msr_write);
static void complete_userspace_rdmsr(struct kvm_vcpu *vcpu)
{
--
2.47.1
next prev parent reply other threads:[~2025-08-12 2:56 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-12 2:55 [PATCH v12 00/24] Enable CET Virtualization Chao Gao
2025-08-12 2:55 ` [PATCH v12 01/24] KVM: x86: Rename kvm_{g,s}et_msr()* to show that they emulate guest accesses Chao Gao
2025-09-01 7:07 ` Xiaoyao Li
2025-09-02 14:28 ` Sean Christopherson
2025-08-12 2:55 ` Chao Gao [this message]
2025-08-12 2:55 ` [PATCH v12 03/24] KVM: x86: Add kvm_msr_{read,write}() helpers Chao Gao
2025-08-12 2:55 ` [PATCH v12 04/24] KVM: x86: Manually clear MPX state only on INIT Chao Gao
2025-08-12 2:55 ` [PATCH v12 05/24] KVM: x86: Zero XSTATE components on INIT by iterating over supported features Chao Gao
2025-08-12 2:55 ` [PATCH v12 06/24] KVM: x86: Introduce KVM_{G,S}ET_ONE_REG uAPIs support Chao Gao
2025-08-19 17:37 ` Sean Christopherson
2025-08-20 8:28 ` Chao Gao
2025-08-21 13:20 ` Chao Gao
2025-08-12 2:55 ` [PATCH v12 07/24] KVM: x86: Report XSS as to-be-saved if there are supported features Chao Gao
2025-08-12 2:55 ` [PATCH v12 08/24] KVM: x86: Refresh CPUID on write to guest MSR_IA32_XSS Chao Gao
2025-08-12 2:55 ` [PATCH v12 09/24] KVM: x86: Initialize kvm_caps.supported_xss Chao Gao
2025-08-12 2:55 ` [PATCH v12 10/24] KVM: x86: Load guest FPU state when access XSAVE-managed MSRs Chao Gao
2025-08-12 2:55 ` [PATCH v12 11/24] KVM: x86: Add fault checks for guest CR4.CET setting Chao Gao
2025-08-12 2:55 ` [PATCH v12 12/24] KVM: x86: Report KVM supported CET MSRs as to-be-saved Chao Gao
2025-08-12 2:55 ` [PATCH v12 13/24] KVM: VMX: Introduce CET VMCS fields and control bits Chao Gao
2025-08-12 2:55 ` [PATCH v12 14/24] KVM: x86: Enable guest SSP read/write interface with new uAPIs Chao Gao
2025-08-12 2:55 ` [PATCH v12 15/24] KVM: VMX: Emulate read and write to CET MSRs Chao Gao
2025-08-19 16:09 ` Sean Christopherson
2025-08-19 17:19 ` Edgecombe, Rick P
2025-08-19 17:50 ` Sean Christopherson
2025-08-19 17:53 ` Xin Li
2025-08-19 18:35 ` Sean Christopherson
2025-08-20 2:32 ` Chao Gao
2025-08-20 14:12 ` Sean Christopherson
2025-08-12 2:55 ` [PATCH v12 16/24] KVM: x86: Save and reload SSP to/from SMRAM Chao Gao
2025-08-12 2:55 ` [PATCH v12 17/24] KVM: VMX: Set up interception for CET MSRs Chao Gao
2025-08-19 16:11 ` Sean Christopherson
2025-08-19 18:05 ` Xin Li
2025-08-19 18:45 ` Sean Christopherson
2025-08-20 2:10 ` Chao Gao
2025-08-12 2:55 ` [PATCH v12 18/24] KVM: VMX: Set host constant supervisor states to VMCS fields Chao Gao
2025-08-18 7:57 ` Chao Gao
2025-08-12 2:55 ` [PATCH v12 19/24] KVM: x86: Don't emulate instructions guarded by CET Chao Gao
2025-08-12 2:55 ` [PATCH v12 20/24] KVM: x86: Enable CET virtualization for VMX and advertise to userspace Chao Gao
2025-08-19 18:49 ` Sean Christopherson
2025-08-12 2:55 ` [PATCH v12 21/24] KVM: nVMX: Virtualize NO_HW_ERROR_CODE_CC for L1 event injection to L2 Chao Gao
2025-08-12 2:55 ` [PATCH v12 22/24] KVM: nVMX: Enable CET support for nested guest Chao Gao
2025-08-15 14:24 ` Chao Gao
2025-08-19 17:18 ` Sean Christopherson
2025-08-12 2:55 ` [PATCH v12 23/24] KVM: nVMX: Add consistency checks for CR0.WP and CR4.CET Chao Gao
2025-08-19 17:27 ` Sean Christopherson
2025-08-20 7:29 ` Chao Gao
2025-08-12 2:55 ` [PATCH v12 24/24] KVM: nVMX: Add consistency checks for CET states Chao Gao
2025-08-15 22:57 ` [PATCH v12 00/24] Enable CET Virtualization Edgecombe, Rick P
2025-08-18 7:53 ` Chao Gao
2025-08-18 22:25 ` Xin Li
2025-08-19 23:11 ` Sean Christopherson
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250812025606.74625-3-chao.gao@intel.com \
--to=chao.gao@intel.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=hpa@zytor.com \
--cc=kvm@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=mlevitsk@redhat.com \
--cc=pbonzini@redhat.com \
--cc=rick.p.edgecombe@intel.com \
--cc=seanjc@google.com \
--cc=tglx@linutronix.de \
--cc=weijiang.yang@intel.com \
--cc=x86@kernel.org \
--cc=xin@zytor.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®