diff options
| author | Andy Lutomirski <luto@kernel.org> | 2017-02-20 19:56:09 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-21 13:48:35 +0300 |
| commit | 4f53ab14285802b298261f8b52af322039d1dfd0 (patch) | |
| tree | 885e931017318cebebb6306610bff889bf5fe96b /arch/x86/include/asm/processor.h | |
| parent | 06ce521af9558814b8606c0476c54497cf83a653 (diff) | |
| download | linux-4f53ab14285802b298261f8b52af322039d1dfd0.tar.xz | |
x86/asm: Define the kernel TSS limit in a macro
Rather than open-coding the kernel TSS limit in set_tss_desc(), make
it a real macro near the TSS layout definition.
This is purely a cleanup.
Cc: Thomas Garnier <thgarnie@google.com>
Cc: Jim Mattson <jmattson@google.com>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/processor.h')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index 1be64da0384e..f8f1b7537abe 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -341,6 +341,16 @@ struct tss_struct { DECLARE_PER_CPU_SHARED_ALIGNED(struct tss_struct, cpu_tss); +/* + * sizeof(unsigned long) coming from an extra "long" at the end + * of the iobitmap. + * + * -1? seg base+limit should be pointing to the address of the + * last valid byte + */ +#define __KERNEL_TSS_LIMIT \ + (IO_BITMAP_OFFSET + IO_BITMAP_BYTES + sizeof(unsigned long) - 1) + #ifdef CONFIG_X86_32 DECLARE_PER_CPU(unsigned long, cpu_current_top_of_stack); #endif |