H. Peter Anvin wrote:
> [PATCH] Clean up x86 control register and MSR macros
>
> This patch is based on Rusty's recent cleanup of the EFLAGS-related
> macros; it extends the same kind of cleanup to control registers and
> MSRs.
>
> It also unifies these between i386 and x86-64; at least with regards
> to MSRs, the two had definitely gotten out of sync.
>
> Signed-off-by: H. Peter Anvin <[email protected]>
>
> diff -urN --exclude='o.*' stock/linux-2.6.21-rc6-mm1/include/asm-i386/Kbuild linux-2.6.21-rc6-mm1/include/asm-i386/Kbuild
> --- stock/linux-2.6.21-rc6-mm1/include/asm-i386/Kbuild 2007-04-05 19:36:56.000000000 -0700
> +++ linux-2.6.21-rc6-mm1/include/asm-i386/Kbuild 2007-04-09 23:28:36.000000000 -0700
> @@ -3,8 +3,10 @@
> header-y += boot.h
> header-y += debugreg.h
> header-y += ldt.h
> +header-y += msr-index.h
> header-y += ptrace-abi.h
> header-y += ucontext.h
>
> +unifdef-y += msr.h
> unifdef-y += mtrr.h
> unifdef-y += vm86.h
> diff -urN --exclude='o.*' stock/linux-2.6.21-rc6-mm1/include/asm-i386/msr-index.h linux-2.6.21-rc6-mm1/include/asm-i386/msr-index.h
> --- stock/linux-2.6.21-rc6-mm1/include/asm-i386/msr-index.h 1969-12-31 16:00:00.000000000 -0800
> +++ linux-2.6.21-rc6-mm1/include/asm-i386/msr-index.h 2007-04-09 18:14:04.000000000 -0700
> @@ -0,0 +1,270 @@
> +#ifndef __ASM_MSR_INDEX_H
> +#define __ASM_MSR_INDEX_ H
>
Extra space.
> +
> +/* x86-64 specific MSRs */
> +#define MSR_EFER 0xc0000080 /* extended feature register */
> +#define MSR_STAR 0xc0000081 /* legacy mode SYSCALL target */
> +#define MSR_LSTAR 0xc0000082 /* long mode SYSCALL target */
> +#define MSR_CSTAR 0xc0000083 /* compat mode SYSCALL target */
> +#define MSR_SYSCALL_MASK 0xc0000084 /* EFLAGS mask for syscall */
> +#define MSR_FS_BASE 0xc0000100 /* 64bit FS base */
> +#define MSR_GS_BASE 0xc0000101 /* 64bit GS base */
> +#define MSR_KERNEL_GS_BASE 0xc0000102 /* SwapGS GS shadow */
> +
> +/* EFER bits: */
> +#define _EFER_SCE 0x00000000 /* SYSCALL/SYSRET */
> +#define _EFER_LME 0x00000008 /* Long mode enable */
> +#define _EFER_LMA 0x0000000a /* Long mode active (read-only) */
> +#define _EFER_NX 0x0000000b /* No execute enable */
> +
> +#define EFER_SCE (1<<_EFER_SCE)
> +#define EFER_LME (1<<_EFER_LME)
> +#define EFER_LMA (1<<_EFER_LMA)
> +#define EFER_NX (1<<_EFER_NX)
>
Is having separate bit numbers and masks useful? If so, is it worth
doing for the others?
Looks OK. Ack.
J
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