linux-kernel - [RFC PATCH 09/73] KVM: x86: Add PVM virtual MSRs into emulated_msrs

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Date: Mon, 26 Feb 2024 22:35:26 +0800
From: Lai Jiangshan <jiangshanlai@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Lai Jiangshan <jiangshan.ljs@...group.com>,
	Hou Wenlong <houwenlong.hwl@...group.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Sean Christopherson <seanjc@...gle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Borislav Petkov <bp@...en8.de>,
	Ingo Molnar <mingo@...hat.com>,
	kvm@...r.kernel.org,
	Paolo Bonzini <pbonzini@...hat.com>,
	x86@...nel.org,
	Kees Cook <keescook@...omium.org>,
	Juergen Gross <jgross@...e.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: [RFC PATCH 09/73] KVM: x86: Add PVM virtual MSRs into emulated_msrs_all[]

From: Lai Jiangshan <jiangshan.ljs@...group.com>

Add PVM virtual MSRs to emulated_msrs_all[], enabling the saving and
restoration of VM states.

Signed-off-by: Lai Jiangshan <jiangshan.ljs@...group.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@...group.com>
---
 arch/x86/kvm/svm/svm.c |  4 ++++
 arch/x86/kvm/vmx/vmx.c |  4 ++++
 arch/x86/kvm/x86.c     | 10 ++++++++++
 3 files changed, 18 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index f3bb30b40876..91ab7cbbe813 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -31,6 +31,7 @@
 
 #include <asm/apic.h>
 #include <asm/perf_event.h>
+#include <asm/pvm_para.h>
 #include <asm/tlbflush.h>
 #include <asm/desc.h>
 #include <asm/debugreg.h>
@@ -4281,6 +4282,9 @@ static bool svm_has_emulated_msr(struct kvm *kvm, u32 index)
 	case MSR_IA32_MCG_EXT_CTL:
 	case KVM_FIRST_EMULATED_VMX_MSR ... KVM_LAST_EMULATED_VMX_MSR:
 		return false;
+	case PVM_VIRTUAL_MSR_BASE ... PVM_VIRTUAL_MSR_MAX:
+		/* This is PVM only. */
+		return false;
 	case MSR_IA32_SMBASE:
 		if (!IS_ENABLED(CONFIG_KVM_SMM))
 			return false;
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index fca47304506e..e20a566f6d83 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -43,6 +43,7 @@
 #include <asm/irq_remapping.h>
 #include <asm/reboot.h>
 #include <asm/perf_event.h>
+#include <asm/pvm_para.h>
 #include <asm/mmu_context.h>
 #include <asm/mshyperv.h>
 #include <asm/mwait.h>
@@ -7004,6 +7005,9 @@ static bool vmx_has_emulated_msr(struct kvm *kvm, u32 index)
 	case MSR_AMD64_TSC_RATIO:
 		/* This is AMD only.  */
 		return false;
+	case PVM_VIRTUAL_MSR_BASE ... PVM_VIRTUAL_MSR_MAX:
+		/* This is PVM only. */
+		return false;
 	default:
 		return true;
 	}
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8ec7a36cdf3e..be8fdae942d1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -84,6 +84,7 @@
 #include <asm/intel_pt.h>
 #include <asm/emulate_prefix.h>
 #include <asm/sgx.h>
+#include <asm/pvm_para.h>
 #include <clocksource/hyperv_timer.h>
 
 #define CREATE_TRACE_POINTS
@@ -1525,6 +1526,15 @@ static const u32 emulated_msrs_all[] = {
 	MSR_KVM_ASYNC_PF_EN, MSR_KVM_STEAL_TIME,
 	MSR_KVM_PV_EOI_EN, MSR_KVM_ASYNC_PF_INT, MSR_KVM_ASYNC_PF_ACK,
 
+	MSR_PVM_LINEAR_ADDRESS_RANGE,
+	MSR_PVM_VCPU_STRUCT,
+	MSR_PVM_SUPERVISOR_RSP,
+	MSR_PVM_SUPERVISOR_REDZONE,
+	MSR_PVM_EVENT_ENTRY,
+	MSR_PVM_RETU_RIP,
+	MSR_PVM_RETS_RIP,
+	MSR_PVM_SWITCH_CR3,
+
 	MSR_IA32_TSC_ADJUST,
 	MSR_IA32_TSC_DEADLINE,
 	MSR_IA32_ARCH_CAPABILITIES,
-- 
2.19.1.6.gb485710b