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[RFC,v2,08/34] x86/msr: Convert a native_wrmsr() use to native_wrmsrq()

Message ID 20250422082216.1954310-9-xin@zytor.com
State New
Headers show
Series MSR refactor with new MSR instructions support | expand

Commit Message

Xin Li (Intel) April 22, 2025, 8:21 a.m. UTC 
Convert a native_wrmsr() use to native_wrmsrq() to zap meaningless type
conversions when a u64 MSR value is splitted into two u32.

Signed-off-by: Xin Li (Intel) <xin@zytor.com>
---
 arch/x86/include/asm/sev-internal.h | 7 +------
 1 file changed, 1 insertion(+), 6 deletions(-)
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Patch

diff --git a/arch/x86/include/asm/sev-internal.h b/arch/x86/include/asm/sev-internal.h
index 73cb774c3639..9da509e52e11 100644
--- a/arch/x86/include/asm/sev-internal.h
+++ b/arch/x86/include/asm/sev-internal.h
@@ -101,12 +101,7 @@  static inline u64 sev_es_rd_ghcb_msr(void)
 
 static __always_inline void sev_es_wr_ghcb_msr(u64 val)
 {
-	u32 low, high;
-
-	low  = (u32)(val);
-	high = (u32)(val >> 32);
-
-	native_wrmsr(MSR_AMD64_SEV_ES_GHCB, low, high);
+	native_wrmsrq(MSR_AMD64_SEV_ES_GHCB, val);
 }
 
 enum es_result sev_es_ghcb_hv_call(struct ghcb *ghcb,