From: "Xin Li (Intel)" <xin@zytor.com>
To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
linux-acpi@vger.kernel.org
Cc: tglx@linutronix.de, mingo@kernel.org, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
peterz@infradead.org, jgross@suse.com,
boris.ostrovsky@oracle.com, rafael@kernel.org, lenb@kernel.org
Subject: [PATCH v1 3/3] x86/msr: Convert a native_wrmsr() use to native_wrmsrq()
Date: Mon, 12 May 2025 01:45:52 -0700 [thread overview]
Message-ID: <20250512084552.1586883-4-xin@zytor.com> (raw)
In-Reply-To: <20250512084552.1586883-1-xin@zytor.com>
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/coco/sev/core.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c
index ff82151f7718..b3ce6fc8b62d 100644
--- a/arch/x86/coco/sev/core.c
+++ b/arch/x86/coco/sev/core.c
@@ -282,12 +282,7 @@ 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);
}
static int vc_fetch_insn_kernel(struct es_em_ctxt *ctxt,
--
2.49.0
next prev parent reply other threads:[~2025-05-12 8:46 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-12 8:45 [PATCH v1 0/3] MSR fixes and cleanups after last round of MSR cleanups Xin Li (Intel)
2025-05-12 8:45 ` [PATCH v1 1/3] x86/msr: Remove a superfluous inclusion of <asm/asm.h> Xin Li (Intel)
2025-05-12 8:45 ` [PATCH v1 2/3] x86/xen/msr: Fix uninitialized symbol 'err' Xin Li (Intel)
2025-05-15 15:29 ` Ingo Molnar
2025-05-15 18:11 ` Xin Li
2025-05-16 13:19 ` Ingo Molnar
2025-05-16 13:42 ` Jürgen Groß
2025-05-17 16:23 ` Xin Li
2025-05-17 16:57 ` [PATCH v1A " Xin Li (Intel)
2025-05-17 18:51 ` Jürgen Groß
2025-05-12 8:45 ` Xin Li (Intel) [this message]
2025-05-15 15:27 ` [PATCH v1 3/3] x86/msr: Convert a native_wrmsr() use to native_wrmsrq() Ingo Molnar
2025-05-15 17:54 ` Xin Li
2025-05-17 4:42 ` Xin Li
2025-05-17 7:12 ` Ingo Molnar
2025-05-17 7:26 ` Xin Li
2025-05-17 13:21 ` Ingo Molnar
2025-05-17 16:25 ` Xin Li
2025-05-19 17:05 ` Xin Li
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