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cpu: Don't set vcpu_dirty when guest_state_protected

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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>
Reviewed-by: Zhao Liu <zhao1.liu@intel.com>
Link: https://lore.kernel.org/r/20250508150002.689633-43-xiaoyao.li@intel.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Xiaoyao Li 2025-05-08 10:59:48 -04:00 • committed by Paolo Bonzini
parent 62a1a8b89d
commit b4b7fb5a77
1 changed files with 3 additions and 1 deletions
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4
accel/kvm/kvm-all.c
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@ -471,7 +471,9 @@ 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;