From: Mauricio Faria de Oliveira <mfo@igalia.com>
To: Thomas Gleixner <tglx@kernel.org>, Ingo Molnar <mingo@redhat.com>,
Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Juergen Gross <jgross@suse.com>,
Alexey Dobriyan <adobriyan@gmail.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Jan Beulich <jbeulich@suse.com>, Brian Gerst <brgerst@gmail.com>
Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org,
xen-devel@lists.xenproject.org,
Mauricio Faria de Oliveira <mfo@igalia.com>
Subject: [PATCH v9 3/5] x86/asm: group inline string functions
Date: Sat, 22 Aug 2026 15:33:19 -0300 [thread overview]
Message-ID: <20260822-pvh-kasan-inline-v9-3-e70ef3b75b6a@igalia.com> (raw)
In-Reply-To: <20260822-pvh-kasan-inline-v9-0-e70ef3b75b6a@igalia.com>
Group the __inline string functions in the same header.
Use <asm/shared/string.h> since __inline_memcmp() must remain there for use
by arch/x86/boot/string.c.
No functional changes.
Signed-off-by: Mauricio Faria de Oliveira <mfo@igalia.com>
---
arch/x86/include/asm/shared/string.h | 21 +++++++++++++++++++++
arch/x86/include/asm/string.h | 21 +--------------------
2 files changed, 22 insertions(+), 20 deletions(-)
diff --git a/arch/x86/include/asm/shared/string.h b/arch/x86/include/asm/shared/string.h
index 06c1d5e5013e4d59cfb49866d10e164362d2c4cc..ab033d27c581e44ba3f5a494ca29e31776be51f2 100644
--- a/arch/x86/include/asm/shared/string.h
+++ b/arch/x86/include/asm/shared/string.h
@@ -2,6 +2,27 @@
#ifndef _ASM_X86_SHARED_STRING_H
#define _ASM_X86_SHARED_STRING_H
+static __always_inline void *__inline_memcpy(void *to, const void *from, size_t len)
+{
+ void *ret = to;
+
+ asm volatile("rep movsb"
+ : "+D" (to), "+S" (from), "+c" (len)
+ : : "memory");
+ return ret;
+}
+
+static __always_inline void *__inline_memset(void *s, int v, size_t n)
+{
+ void *ret = s;
+
+ asm volatile("rep stosb"
+ : "+D" (s), "+c" (n)
+ : "a" ((uint8_t)v)
+ : "memory");
+ return ret;
+}
+
/*
* This inline memcmp() returns 0 (equal) or 1 (not equal).
* The regular memcmp() returns <0 (less than), 0 (equal), or >0 (greater than)
diff --git a/arch/x86/include/asm/string.h b/arch/x86/include/asm/string.h
index 9cb5aae7fba9ffcf0f5af8f939d30467750ccaa9..dbf59f0d4cca71e2ddce0d8764aeec8782236669 100644
--- a/arch/x86/include/asm/string.h
+++ b/arch/x86/include/asm/string.h
@@ -8,25 +8,6 @@
# include <asm/string_64.h>
#endif
-static __always_inline void *__inline_memcpy(void *to, const void *from, size_t len)
-{
- void *ret = to;
-
- asm volatile("rep movsb"
- : "+D" (to), "+S" (from), "+c" (len)
- : : "memory");
- return ret;
-}
-
-static __always_inline void *__inline_memset(void *s, int v, size_t n)
-{
- void *ret = s;
-
- asm volatile("rep stosb"
- : "+D" (s), "+c" (n)
- : "a" ((uint8_t)v)
- : "memory");
- return ret;
-}
+#include <asm/shared/string.h>
#endif /* _ASM_X86_STRING_H */
--
2.47.3
next prev parent reply other threads:[~2026-08-22 18:33 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-22 18:33 [PATCH v9 0/5] x86/pvh: fix unbootable VMs again (PVH + KASAN) Mauricio Faria de Oliveira
2026-08-22 18:33 ` [PATCH v9 1/5] x86/boot: Remove "cc" clobber from memcmp() Mauricio Faria de Oliveira
2026-09-01 13:16 ` Jan Beulich
2026-09-02 8:33 ` David Laight
2026-09-02 14:18 ` H. Peter Anvin
2026-09-02 2:31 ` Borislav Petkov
2026-09-02 13:29 ` Michael Matz
2026-09-02 13:48 ` Mauricio Faria de Oliveira
2026-09-03 0:01 ` Borislav Petkov
2026-09-03 0:07 ` Mauricio Faria de Oliveira
2026-09-03 0:39 ` Borislav Petkov
2026-09-03 8:40 ` David Laight
2026-09-02 23:58 ` Borislav Petkov
2026-08-22 18:33 ` [PATCH v9 2/5] x86/asm, x86/boot: expose inline memcmp() Mauricio Faria de Oliveira
2026-09-06 17:01 ` Borislav Petkov
2026-09-06 18:15 ` H. Peter Anvin
2026-09-08 18:04 ` Mauricio Faria de Oliveira
2026-09-08 19:32 ` Borislav Petkov
2026-09-08 21:06 ` Mauricio Faria de Oliveira
2026-09-10 3:38 ` Borislav Petkov
2026-09-10 13:07 ` Mauricio Faria de Oliveira
2026-09-10 14:03 ` H. Peter Anvin
2026-09-08 23:16 ` H. Peter Anvin
2026-09-09 8:38 ` David Laight
2026-09-09 13:43 ` H. Peter Anvin
2026-09-09 19:28 ` David Laight
2026-09-09 19:33 ` H. Peter Anvin
2026-09-09 21:39 ` David Laight
2026-09-09 23:12 ` H. Peter Anvin
2026-09-08 17:57 ` Mauricio Faria de Oliveira
2026-08-22 18:33 ` Mauricio Faria de Oliveira [this message]
2026-08-22 18:33 ` [PATCH v9 4/5] x86/cpuid: fix unbootable VMs by really inlining memcmp() in hypervisor_cpuid_base() Mauricio Faria de Oliveira
2026-09-11 4:38 ` Borislav Petkov
2026-09-14 11:22 ` Mauricio Faria de Oliveira
2026-09-15 5:11 ` Borislav Petkov
2026-09-15 8:43 ` David Laight
2026-09-15 15:48 ` Borislav Petkov
2026-09-15 23:49 ` Mauricio Faria de Oliveira
2026-09-16 0:04 ` Borislav Petkov
2026-09-16 0:52 ` Mauricio Faria de Oliveira
2026-08-22 18:33 ` [PATCH v9 5/5] x86/pvh: fix unbootable VMs by really inlining memset() in xen_prepare_pvh() Mauricio Faria de Oliveira
2026-09-11 4:39 ` Borislav Petkov
2026-09-14 11:40 ` Mauricio Faria de Oliveira
2026-09-15 5:26 ` Borislav Petkov
2026-09-15 23:55 ` Mauricio Faria de Oliveira
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