summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2022-04-06 02:29:23 +0300
committerDave Hansen <dave.hansen@linux.intel.com>2022-04-07 08:27:52 -0700
commit1e8f93e18379d05da9fd130eb7d50988a20f8b9a (patch)
tree12c5cc4f59c0b0e414612e494ac9e016442442ca
parent15104de122a4f0258981b06ed94cf616a6eb03ef (diff)
x86: Consolidate port I/O helpers
There are two implementations of port I/O helpers: one in the kernel and one in the boot stub. Move the helpers required for both to <asm/shared/io.h> and use the one implementation everywhere. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20220405232939.73860-15-kirill.shutemov@linux.intel.com
-rw-r--r--arch/x86/boot/boot.h35
-rw-r--r--arch/x86/boot/compressed/misc.h2
-rw-r--r--arch/x86/include/asm/io.h22
-rw-r--r--arch/x86/include/asm/shared/io.h34
4 files changed, 38 insertions, 55 deletions
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 34c9dbb6a47d..22a474c5b3e8 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -23,6 +23,7 @@
#include <linux/edd.h>
#include <asm/setup.h>
#include <asm/asm.h>
+#include <asm/shared/io.h>
#include "bitops.h"
#include "ctype.h"
#include "cpuflags.h"
@@ -35,40 +36,6 @@ extern struct boot_params boot_params;
#define cpu_relax() asm volatile("rep; nop")
-/* Basic port I/O */
-static inline void outb(u8 v, u16 port)
-{
- asm volatile("outb %0,%1" : : "a" (v), "dN" (port));
-}
-static inline u8 inb(u16 port)
-{
- u8 v;
- asm volatile("inb %1,%0" : "=a" (v) : "dN" (port));
- return v;
-}
-
-static inline void outw(u16 v, u16 port)
-{
- asm volatile("outw %0,%1" : : "a" (v), "dN" (port));
-}
-static inline u16 inw(u16 port)
-{
- u16 v;
- asm volatile("inw %1,%0" : "=a" (v) : "dN" (port));
- return v;
-}
-
-static inline void outl(u32 v, u16 port)
-{
- asm volatile("outl %0,%1" : : "a" (v), "dN" (port));
-}
-static inline u32 inl(u16 port)
-{
- u32 v;
- asm volatile("inl %1,%0" : "=a" (v) : "dN" (port));
- return v;
-}
-
static inline void io_delay(void)
{
const u16 DELAY_PORT = 0x80;
diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h
index 0d8e275a9d96..8a253e85f990 100644
--- a/arch/x86/boot/compressed/misc.h
+++ b/arch/x86/boot/compressed/misc.h
@@ -22,11 +22,11 @@
#include <linux/linkage.h>
#include <linux/screen_info.h>
#include <linux/elf.h>
-#include <linux/io.h>
#include <asm/page.h>
#include <asm/boot.h>
#include <asm/bootparam.h>
#include <asm/desc_defs.h>
+#include <asm/shared/io.h>
#include "tdx.h"
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 638c1a2a82e0..a1eb218a49f8 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -44,6 +44,7 @@
#include <asm/page.h>
#include <asm/early_ioremap.h>
#include <asm/pgtable_types.h>
+#include <asm/shared/io.h>
#define build_mmio_read(name, size, type, reg, barrier) \
static inline type name(const volatile void __iomem *addr) \
@@ -258,20 +259,6 @@ static inline void slow_down_io(void)
#endif
#define BUILDIO(bwl, bw, type) \
-static inline void out##bwl(type value, u16 port) \
-{ \
- asm volatile("out" #bwl " %" #bw "0, %w1" \
- : : "a"(value), "Nd"(port)); \
-} \
- \
-static inline type in##bwl(u16 port) \
-{ \
- type value; \
- asm volatile("in" #bwl " %w1, %" #bw "0" \
- : "=a"(value) : "Nd"(port)); \
- return value; \
-} \
- \
static inline void out##bwl##_p(type value, u16 port) \
{ \
out##bwl(value, port); \
@@ -320,10 +307,8 @@ static inline void ins##bwl(u16 port, void *addr, unsigned long count) \
BUILDIO(b, b, u8)
BUILDIO(w, w, u16)
BUILDIO(l, , u32)
+#undef BUILDIO
-#define inb inb
-#define inw inw
-#define inl inl
#define inb_p inb_p
#define inw_p inw_p
#define inl_p inl_p
@@ -331,9 +316,6 @@ BUILDIO(l, , u32)
#define insw insw
#define insl insl
-#define outb outb
-#define outw outw
-#define outl outl
#define outb_p outb_p
#define outw_p outw_p
#define outl_p outl_p
diff --git a/arch/x86/include/asm/shared/io.h b/arch/x86/include/asm/shared/io.h
new file mode 100644
index 000000000000..c0ef921c0586
--- /dev/null
+++ b/arch/x86/include/asm/shared/io.h
@@ -0,0 +1,34 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_X86_SHARED_IO_H
+#define _ASM_X86_SHARED_IO_H
+
+#include <linux/types.h>
+
+#define BUILDIO(bwl, bw, type) \
+static inline void __out##bwl(type value, u16 port) \
+{ \
+ asm volatile("out" #bwl " %" #bw "0, %w1" \
+ : : "a"(value), "Nd"(port)); \
+} \
+ \
+static inline type __in##bwl(u16 port) \
+{ \
+ type value; \
+ asm volatile("in" #bwl " %w1, %" #bw "0" \
+ : "=a"(value) : "Nd"(port)); \
+ return value; \
+}
+
+BUILDIO(b, b, u8)
+BUILDIO(w, w, u16)
+BUILDIO(l, , u32)
+#undef BUILDIO
+
+#define inb __inb
+#define inw __inw
+#define inl __inl
+#define outb __outb
+#define outw __outw
+#define outl __outl
+
+#endif