On Thu, Mar 26, 2020 at 04:18:38PM +0800, Yang Weijiang wrote:
> If VM_EXIT_LOAD_HOST_CET_STATE = 1, the host CET states are restored
> from below VMCS fields at VM-Exit:
> HOST_S_CET
> HOST_SSP
> HOST_INTR_SSP_TABLE
>
> If VM_ENTRY_LOAD_GUEST_CET_STATE = 1, the guest CET states are loaded
> from below VMCS fields at VM-Entry:
> GUEST_S_CET
> GUEST_SSP
> GUEST_INTR_SSP_TABLE
>
> Co-developed-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx>
> Signed-off-by: Zhang Yi Z <yi.z.zhang@xxxxxxxxxxxxxxx>
> Signed-off-by: Yang Weijiang <weijiang.yang@xxxxxxxxx>
> ---
...
> diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
> index 5e090d1f03f8..e938bc6c37aa 100644
> --- a/arch/x86/include/asm/vmx.h
> +++ b/arch/x86/include/asm/vmx.h
> @@ -94,6 +94,7 @@
> #define VM_EXIT_CLEAR_BNDCFGS 0x00800000
> #define VM_EXIT_PT_CONCEAL_PIP 0x01000000
> #define VM_EXIT_CLEAR_IA32_RTIT_CTL 0x02000000
> +#define VM_EXIT_LOAD_HOST_CET_STATE 0x10000000
>
> #define VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR 0x00036dff
>
> @@ -107,6 +108,7 @@
> #define VM_ENTRY_LOAD_BNDCFGS 0x00010000
> #define VM_ENTRY_PT_CONCEAL_PIP 0x00020000
> #define VM_ENTRY_LOAD_IA32_RTIT_CTL 0x00040000
> +#define VM_ENTRY_LOAD_GUEST_CET_STATE 0x00100000
I think it probably make senses to drop HOST/GUEST from the controls,
i.e. VM_{ENTER,EXIT}_LOAD_CET_STATE. The SDM doesn't qualify them with
guest vs. host, nor does KVM qualify any of the other entry/exit controls
that are effective guest vs. host.
