[PATCH 2/3] x86/sev: add SVSM call macros for the vTPM protocol

[Stefano Garzarella]

Add macros for SVSM_VTPM_QUERY and SVSM_VTPM_CMD calls as defined
in the "Secure VM Service Module for SEV-SNP Guests"
Publication # 58019 Revision: 1.00

Link: https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/58019.pdf
Signed-off-by: Stefano Garzarella <sgarzare@xxxxxxxxxx>
---
 arch/x86/include/asm/sev.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/x86/include/asm/sev.h b/arch/x86/include/asm/sev.h
index 91f08af31078..97dcc8d938a6 100644
--- a/arch/x86/include/asm/sev.h
+++ b/arch/x86/include/asm/sev.h
@@ -365,6 +365,10 @@ struct svsm_call {
 #define SVSM_ATTEST_SERVICES		0
 #define SVSM_ATTEST_SINGLE_SERVICE	1
 
+#define SVSM_VTPM_CALL(x)		((2ULL << 32) | (x))
+#define SVSM_VTPM_QUERY			0
+#define SVSM_VTPM_CMD			1
+
 #ifdef CONFIG_AMD_MEM_ENCRYPT
 
 extern u8 snp_vmpl;
-- 
2.47.1