[PATCH v4 19/28] KVM: TDX: Derive error argument names from the local variable names

[Binbin Wu]

On 10/31/2025 4:09 AM, Sean Christopherson wrote:
> When printing SEAMCALL errors, use the name of the variable holding an
> error parameter instead of the register from whence it came, so that flows
> which use descriptive variable names will similarly print descriptive
> error messages.
>
> Suggested-by: Rick Edgecombe <rick.p.edgecombe at intel.com>
> Signed-off-by: Sean Christopherson <seanjc at google.com>

Reviewed-by: Binbin Wu <binbin.wu at linux.intel.com>

> ---
>   arch/x86/kvm/vmx/tdx.c | 13 +++++++------
>   1 file changed, 7 insertions(+), 6 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
> index 5e6f2d8b6014..63d4609cc3bc 100644
> --- a/arch/x86/kvm/vmx/tdx.c
> +++ b/arch/x86/kvm/vmx/tdx.c
> @@ -41,14 +41,15 @@
>   #define TDX_BUG_ON(__err, __fn, __kvm)				\
>   	__TDX_BUG_ON(__err, #__fn, __kvm, "%s", "")
>   
> -#define TDX_BUG_ON_1(__err, __fn, __rcx, __kvm)			\
> -	__TDX_BUG_ON(__err, #__fn, __kvm, ", rcx 0x%llx", __rcx)
> +#define TDX_BUG_ON_1(__err, __fn, a1, __kvm)			\
> +	__TDX_BUG_ON(__err, #__fn, __kvm, ", " #a1 " 0x%llx", a1)
>   
> -#define TDX_BUG_ON_2(__err, __fn, __rcx, __rdx, __kvm)		\
> -	__TDX_BUG_ON(__err, #__fn, __kvm, ", rcx 0x%llx, rdx 0x%llx", __rcx, __rdx)
> +#define TDX_BUG_ON_2(__err, __fn, a1, a2, __kvm)	\
> +	__TDX_BUG_ON(__err, #__fn, __kvm, ", " #a1 " 0x%llx, " #a2 " 0x%llx", a1, a2)
>   
> -#define TDX_BUG_ON_3(__err, __fn, __rcx, __rdx, __r8, __kvm)	\
> -	__TDX_BUG_ON(__err, #__fn, __kvm, ", rcx 0x%llx, rdx 0x%llx, r8 0x%llx", __rcx, __rdx, __r8)
> +#define TDX_BUG_ON_3(__err, __fn, a1, a2, a3, __kvm)	\
> +	__TDX_BUG_ON(__err, #__fn, __kvm, ", " #a1 " 0x%llx, " #a2 ", 0x%llx, " #a3 " 0x%llx", \
> +		     a1, a2, a3)
>   
>   
>   bool enable_tdx __ro_after_init;