From: Nicușor Cîțu <nicu.c...@icloud.com>
This is needed for the KVMI_VCPU_SET_REGISTERS command, which allows
an introspection tool to override the kvm_regs structure for a specific
vCPU without clearing the pending exception.
Signed-off-by: Nicușor Cîțu <nicu.c...@icloud.com>
Signed-off-by: Adalbert Lazăr <ala...@bitdefender.com>
---
arch/x86/kvm/x86.c | 13 ++++++++++---
include/linux/kvm_host.h | 2 ++
2 files changed, 12 insertions(+), 3 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f7d09757b85f..bbcd256dc2f4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10104,8 +10104,15 @@ static void __set_regs(struct kvm_vcpu *vcpu, struct
kvm_regs *regs)
kvm_rip_write(vcpu, regs->rip);
kvm_set_rflags(vcpu, regs->rflags | X86_EFLAGS_FIXED);
+}
+
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs,
+ bool clear_exception)
+{
+ __set_regs(vcpu, regs);
- vcpu->arch.exception.pending = false;
+ if (clear_exception)
+ vcpu->arch.exception.pending = false;
kvm_make_request(KVM_REQ_EVENT, vcpu);
}
@@ -10113,7 +10120,7 @@ static void __set_regs(struct kvm_vcpu *vcpu, struct
kvm_regs *regs)
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
{
vcpu_load(vcpu);
- __set_regs(vcpu, regs);
+ kvm_arch_vcpu_set_regs(vcpu, regs, true);
vcpu_put(vcpu);
return 0;
}
@@ -10601,7 +10608,7 @@ static void store_regs(struct kvm_vcpu *vcpu)
static int sync_regs(struct kvm_vcpu *vcpu)
{
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) {
- __set_regs(vcpu, &vcpu->run->s.regs.regs);
+ kvm_arch_vcpu_set_regs(vcpu, &vcpu->run->s.regs.regs, true);
vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_REGS;
}
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_SREGS) {
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7bc45e1879db..712642be3307 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1028,6 +1028,8 @@ int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
void kvm_arch_vcpu_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
+void kvm_arch_vcpu_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs,
+ bool clear_exception);
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs);
void kvm_arch_vcpu_get_sregs(struct kvm_vcpu *vcpu,
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