From: Ashish Kalra <ashish.kalra@xxxxxxx>
Add sev_es_enabled() function to detect if SEV-ES
support is enabled.
Signed-off-by: Ashish Kalra <ashish.kalra@xxxxxxx>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>
---
arch/x86/boot/compressed/sev.c | 5 +++++
arch/x86/boot/compressed/sev.h | 2 ++
2 files changed, 7 insertions(+)
diff --git a/arch/x86/boot/compressed/sev.c b/arch/x86/boot/compressed/sev.c
index ec71846d28c9..4ae4cc51e6b8 100644
--- a/arch/x86/boot/compressed/sev.c
+++ b/arch/x86/boot/compressed/sev.c
@@ -134,6 +134,11 @@ bool sev_snp_enabled(void)
return sev_status & MSR_AMD64_SEV_SNP_ENABLED;
}
+bool sev_es_enabled(void)
+{
+ return sev_status & MSR_AMD64_SEV_ES_ENABLED;
+}
+
static void __page_state_change(unsigned long paddr, enum psc_op op)
{
u64 val;
diff --git a/arch/x86/boot/compressed/sev.h b/arch/x86/boot/compressed/sev.h
index fc725a981b09..5008c80e66e6 100644
--- a/arch/x86/boot/compressed/sev.h
+++ b/arch/x86/boot/compressed/sev.h
@@ -11,11 +11,13 @@
#ifdef CONFIG_AMD_MEM_ENCRYPT
bool sev_snp_enabled(void);
+bool sev_es_enabled(void);
void snp_accept_memory(phys_addr_t start, phys_addr_t end);
#else
static inline bool sev_snp_enabled(void) { return false; }
+static inline bool sev_es_enabled(void) { return false; }
static inline void snp_accept_memory(phys_addr_t start, phys_addr_t end) { }
#endif
--
2.34.1
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