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KVM: x86: Extract REGS and SREGS runtime sync code to helpers

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Extract the REGS and SREGS portions of {store,sync}_regs() into separate
helpers in anticipation of moving the register specific code out of x86.c
and into regs.c.

No functional change intended.

Cc: Yosry Ahmed <yosry@kernel.org>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Kai Huang <kai.huang@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Message-ID: <20260613000329.732085-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2026-06-12 17:03:00 -07:00 committed by Paolo Bonzini
parent 098e32cba3
commit 6a8a98aa9c
1 changed files with 15 additions and 2 deletions
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17
arch/x86/kvm/x86.c
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@ -12685,7 +12685,7 @@ int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
return 0;
}
static void store_regs(struct kvm_vcpu *vcpu)
static void kvm_run_sync_regs_to_user(struct kvm_vcpu *vcpu)
{
BUILD_BUG_ON(sizeof(struct kvm_sync_regs) > SYNC_REGS_SIZE_BYTES);
@ -12694,13 +12694,18 @@ static void store_regs(struct kvm_vcpu *vcpu)
if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_SREGS)
__get_sregs(vcpu, &vcpu->run->s.regs.sregs);
}
static void store_regs(struct kvm_vcpu *vcpu)
{
kvm_run_sync_regs_to_user(vcpu);
if (vcpu->run->kvm_valid_regs & KVM_SYNC_X86_EVENTS)
kvm_vcpu_ioctl_x86_get_vcpu_events(
vcpu, &vcpu->run->s.regs.events);
}
static int sync_regs(struct kvm_vcpu *vcpu)
static int kvm_run_sync_regs_from_user(struct kvm_vcpu *vcpu)
{
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_REGS) {
__set_regs(vcpu, &vcpu->run->s.regs.regs);
@ -12716,6 +12721,14 @@ static int sync_regs(struct kvm_vcpu *vcpu)
vcpu->run->kvm_dirty_regs &= ~KVM_SYNC_X86_SREGS;
}
return 0;
}
static int sync_regs(struct kvm_vcpu *vcpu)
{
if (kvm_run_sync_regs_from_user(vcpu))
return -EINVAL;
if (vcpu->run->kvm_dirty_regs & KVM_SYNC_X86_EVENTS) {
struct kvm_vcpu_events events = vcpu->run->s.regs.events;