From f9a4d621761a2c7db686cc47772a0688d389f2d7 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Mon, 14 Dec 2020 10:26:51 -0500
Subject: [PATCH] KVM: x86: introduce complete_emulated_msr callback
This will be used by SEV-ES to inject MSR failure via the GHCB.
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/svm/svm.c | 1 +
arch/x86/kvm/vmx/vmx.c | 1 +
arch/x86/kvm/x86.c | 8 ++++----
4 files changed, 7 insertions(+), 4 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 8cf6b0493d492..18aa15e6fadd0 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1285,6 +1285,7 @@ struct kvm_x86_ops {
void (*migrate_timers)(struct kvm_vcpu *vcpu);
void (*msr_filter_changed)(struct kvm_vcpu *vcpu);
+ int (*complete_emulated_msr)(struct kvm_vcpu *vcpu, int err);
};
struct kvm_x86_nested_ops {
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 801e0a641258f..4067d511be080 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -4306,6 +4306,7 @@ static struct kvm_x86_ops svm_x86_ops __initdata = {
.apic_init_signal_blocked = svm_apic_init_signal_blocked,
.msr_filter_changed = svm_msr_filter_changed,
+ .complete_emulated_msr = kvm_complete_insn_gp,
};
static struct kvm_x86_init_ops svm_init_ops __initdata = {
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 849be2a9f2605..55fa51c0cd9db 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7701,6 +7701,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.migrate_timers = vmx_migrate_timers,
.msr_filter_changed = vmx_msr_filter_changed,
+ .complete_emulated_msr = kvm_complete_insn_gp,
.cpu_dirty_log_size = vmx_cpu_dirty_log_size,
};
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 5c5a6aa8696df..75f10aee23b5d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1642,12 +1642,12 @@ static int complete_emulated_rdmsr(struct kvm_vcpu *vcpu)
kvm_rdx_write(vcpu, vcpu->run->msr.data >> 32);
}
- return kvm_complete_insn_gp(vcpu, err);
+ return kvm_x86_ops.complete_emulated_msr(vcpu, err);
}
static int complete_emulated_wrmsr(struct kvm_vcpu *vcpu)
{
- return kvm_complete_insn_gp(vcpu, vcpu->run->msr.error);
+ return kvm_x86_ops.complete_emulated_msr(vcpu, vcpu->run->msr.error);
}
static u64 kvm_msr_reason(int r)
@@ -1719,7 +1719,7 @@ int kvm_emulate_rdmsr(struct kvm_vcpu *vcpu)
trace_kvm_msr_read_ex(ecx);
}
- return kvm_complete_insn_gp(vcpu, r);
+ return kvm_x86_ops.complete_emulated_msr(vcpu, r);
}
EXPORT_SYMBOL_GPL(kvm_emulate_rdmsr);
@@ -1745,7 +1745,7 @@ int kvm_emulate_wrmsr(struct kvm_vcpu *vcpu)
else
trace_kvm_msr_write_ex(ecx, data);
- return kvm_complete_insn_gp(vcpu, r);
+ return kvm_x86_ops.complete_emulated_msr(vcpu, r);
}
EXPORT_SYMBOL_GPL(kvm_emulate_wrmsr);
--
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