From: Dave Hansen <dave.hansen@linux.intel.com>
To: linux-kernel@vger.kernel.org
Cc: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Juergen Gross <jgross@suse.com>,
virtualization@lists.linux.dev,
Dave Hansen <dave.hansen@linux.intel.com>
Subject: [PATCH 4/8] x86/msr: Consolidate rdmsrq() implementations
Date: Fri, 20 Mar 2026 12:03:36 -0700 [thread overview]
Message-ID: <20260320190336.3577EA1C@davehans-spike.ostc.intel.com> (raw)
In-Reply-To: <20260320190330.A97C443B@davehans-spike.ostc.intel.com>
From: Dave Hansen <dave.hansen@linux.intel.com>
Use the new "raw_" indirection and consolidate the two rdmsrq()
implementations down to one.
The paravirt implementation was probably better, but just stick
with the native one here for consistency.
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
---
b/arch/x86/include/asm/msr.h | 6 +++---
b/arch/x86/include/asm/paravirt.h | 5 -----
2 files changed, 3 insertions(+), 8 deletions(-)
diff -puN arch/x86/include/asm/msr.h~rdmsr-dups-5 arch/x86/include/asm/msr.h
--- a/arch/x86/include/asm/msr.h~rdmsr-dups-5 2026-03-20 11:24:19.885830584 -0700
+++ b/arch/x86/include/asm/msr.h 2026-03-20 11:24:19.892830895 -0700
@@ -194,9 +194,6 @@ static inline void wrmsr(u32 msr, u32 lo
raw_write_msr(msr, (u64)high << 32 | low);
}
-#define rdmsrq(msr, val) \
- ((val) = raw_read_msr((msr)))
-
static inline void wrmsrq(u32 msr, u64 val)
{
raw_write_msr(msr, val);
@@ -240,6 +237,9 @@ do { \
__err; \
})
+#define rdmsrq(msr, val) \
+ ((val) = raw_read_msr((msr)))
+
/* Instruction opcode for WRMSRNS supported in binutils >= 2.40 */
#define ASM_WRMSRNS _ASM_BYTES(0x0f,0x01,0xc6)
diff -puN arch/x86/include/asm/paravirt.h~rdmsr-dups-5 arch/x86/include/asm/paravirt.h
--- a/arch/x86/include/asm/paravirt.h~rdmsr-dups-5 2026-03-20 11:24:19.888830717 -0700
+++ b/arch/x86/include/asm/paravirt.h 2026-03-20 11:24:19.891830851 -0700
@@ -166,11 +166,6 @@ static __always_inline void wrmsr(u32 ms
paravirt_write_msr(msr, (u64)high << 32 | low);
}
-#define rdmsrq(msr, val) \
-do { \
- val = paravirt_read_msr(msr); \
-} while (0)
-
static inline void wrmsrq(u32 msr, u64 val)
{
paravirt_write_msr(msr, val);
_
next prev parent reply other threads:[~2026-03-20 19:03 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 19:03 [PATCH 0/8] x86/msr: Consolidate native/paravirt MSR functions Dave Hansen
2026-03-20 19:03 ` [PATCH 1/8] x86/msr: Use "raw_" names for calls to native_* functions Dave Hansen
2026-03-20 19:03 ` [PATCH 2/8] x86/msr: Consolidate rdmsr() definitions Dave Hansen
2026-03-20 19:03 ` [PATCH 3/8] x86/msr: Consolidate rdmsr_safe() implementations Dave Hansen
2026-03-20 19:03 ` Dave Hansen [this message]
2026-03-20 19:03 ` [PATCH 5/8] x86/msr: Consolidate {rd,wr}msr[q]_safe() implementations Dave Hansen
2026-03-20 19:03 ` [PATCH 6/8] x86/msr: Consolidate rdpmc() implementations Dave Hansen
2026-03-20 19:03 ` [PATCH 7/8] x86/msr: Remove old crusty comment Dave Hansen
2026-03-20 19:03 ` [PATCH 8/8] x86/msr: Remove duplicate #include Dave Hansen
2026-03-20 23:33 ` [PATCH 0/8] x86/msr: Consolidate native/paravirt MSR functions Borislav Petkov
2026-03-20 23:39 ` Dave Hansen
2026-03-21 6:23 ` Jürgen Groß
2026-03-23 15:22 ` Juergen Gross
2026-03-31 21:41 ` Dave Hansen
2026-04-01 6:12 ` Jürgen Groß
2026-03-31 21:37 ` Dave Hansen
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