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

Xin Li (Intel)
2025-04-22T08:23:58Z

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(-)

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,
--
2.49.0