diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2019-04-14 18:59:45 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-04-17 13:48:00 +0300 |
| commit | 8f34c5b5afce91d171bb0802631197484cb69b8b (patch) | |
| tree | b79c16c0f7f572ce200b221230d377971b85a4ae /arch/x86/include/asm/page_64_types.h | |
| parent | 30842211506e376b76394a9cb4e6d0c9d258b8d4 (diff) | |
| download | linux-8f34c5b5afce91d171bb0802631197484cb69b8b.tar.xz | |
x86/exceptions: Make IST index zero based
The defines for the exception stack (IST) array in the TSS are using the
SDM convention IST1 - IST7. That causes all sorts of code to subtract 1 for
array indices related to IST. That's confusing at best and does not provide
any value.
Make the indices zero based and fixup the usage sites. The only code which
needs to adjust the 0 based index is the interrupt descriptor setup which
needs to add 1 now.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: "Chang S. Bae" <chang.seok.bae@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Dou Liyang <douly.fnst@cn.fujitsu.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: linux-doc@vger.kernel.org
Cc: Nicolai Stange <nstange@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qian Cai <cai@lca.pw>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190414160144.331772825@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/page_64_types.h')
| -rw-r--r-- | arch/x86/include/asm/page_64_types.h | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index bcd8c0518604..6ab2c54c1bf9 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -24,11 +24,14 @@ #define IRQ_STACK_ORDER (2 + KASAN_STACK_ORDER) #define IRQ_STACK_SIZE (PAGE_SIZE << IRQ_STACK_ORDER) -#define DOUBLEFAULT_STACK 1 -#define NMI_STACK 2 -#define DEBUG_STACK 3 -#define MCE_STACK 4 -#define N_EXCEPTION_STACKS 4 /* hw limit: 7 */ +/* + * The index for the tss.ist[] array. The hardware limit is 7 entries. + */ +#define ESTACK_DF 0 +#define ESTACK_NMI 1 +#define ESTACK_DB 2 +#define ESTACK_MCE 3 +#define N_EXCEPTION_STACKS 4 /* * Set __PAGE_OFFSET to the most negative possible address + |