diff mbox series

[v7,39/52] cpu: Don't set vcpu_dirty when guest_state_protected

Message ID 20250124132048.3229049-40-xiaoyao.li@intel.com (mailing list archive)
State New
Headers show
Series QEMU TDX support | expand

Commit Message

Xiaoyao Li Jan. 24, 2025, 1:20 p.m. UTC 
QEMU calls kvm_arch_put_registers() when vcpu_dirty is true in
kvm_vcpu_exec(). However, for confidential guest, like TDX, putting
registers is disallowed due to guest state is protected.

Only set vcpu_dirty to true with guest state is not protected when
creating the vcpu.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
Changes in v7:
 - new patch to replace "i386/tdx: Don't get/put guest state for TDX VMs"
   in v6;
---
 accel/kvm/kvm-all.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index e35a9fbd687e..c1fea69d582e 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -466,7 +466,9 @@  int kvm_create_vcpu(CPUState *cpu)
 
     cpu->kvm_fd = kvm_fd;
     cpu->kvm_state = s;
-    cpu->vcpu_dirty = true;
+    if (!s->guest_state_protected) {
+        cpu->vcpu_dirty = true;
+    }
     cpu->dirty_pages = 0;
     cpu->throttle_us_per_full = 0;