diff options
| author | H. Peter Anvin (Intel) <hpa@zytor.com> | 2023-01-12 10:20:31 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2023-01-12 15:06:36 +0300 |
| commit | ae53fa18703000f507107df43efd1168a0365361 (patch) | |
| tree | 465debef68863f87d422789e2e5b53c5a6c99734 /arch/x86/include/asm/gsseg.h | |
| parent | df729fb05ae2db52f7de150439392a88ee9d9b4f (diff) | |
| download | linux-ae53fa18703000f507107df43efd1168a0365361.tar.xz | |
x86/gsseg: Move load_gs_index() to its own new header file
GS is a special segment on x86_64, move load_gs_index() to its own new
header file to simplify header inclusion.
No change in functionality.
Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20230112072032.35626-5-xin3.li@intel.com
Diffstat (limited to 'arch/x86/include/asm/gsseg.h')
| -rw-r--r-- | arch/x86/include/asm/gsseg.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/arch/x86/include/asm/gsseg.h b/arch/x86/include/asm/gsseg.h new file mode 100644 index 000000000000..d15577c39e8d --- /dev/null +++ b/arch/x86/include/asm/gsseg.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#ifndef _ASM_X86_GSSEG_H +#define _ASM_X86_GSSEG_H + +#include <linux/types.h> + +#include <asm/asm.h> +#include <asm/cpufeature.h> +#include <asm/alternative.h> +#include <asm/processor.h> +#include <asm/nops.h> + +#ifdef CONFIG_X86_64 + +extern asmlinkage void asm_load_gs_index(u16 selector); + +static inline void native_load_gs_index(unsigned int selector) +{ + unsigned long flags; + + local_irq_save(flags); + asm_load_gs_index(selector); + local_irq_restore(flags); +} + +#endif /* CONFIG_X86_64 */ + +#ifndef CONFIG_PARAVIRT_XXL + +static inline void load_gs_index(unsigned int selector) +{ +#ifdef CONFIG_X86_64 + native_load_gs_index(selector); +#else + loadsegment(gs, selector); +#endif +} + +#endif /* CONFIG_PARAVIRT_XXL */ + +#endif /* _ASM_X86_GSSEG_H */ |