diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2019-04-14 18:59:55 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-04-17 16:01:09 +0300 |
| commit | 3207426925d2b4da390be8068df1d1c2b36e5918 (patch) | |
| tree | d595193cc744409685e00ac141d0b67906ffffe3 /arch/x86/include/asm/page_64_types.h | |
| parent | 4d68c3d0ecd5fcba8876e8a58ac41ffb360de43e (diff) | |
| download | linux-3207426925d2b4da390be8068df1d1c2b36e5918.tar.xz | |
x86/exceptions: Disconnect IST index and stack order
The entry order of the TSS.IST array and the order of the stack
storage/mapping are not required to be the same.
With the upcoming split of the debug stack this is going to fall apart as
the number of TSS.IST array entries stays the same while the actual stacks
are increasing.
Make them separate so that code like dumpstack can just utilize the mapping
order. The IST index is solely required for the actual TSS.IST array
initialization.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: "Chang S. Bae" <chang.seok.bae@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: Jann Horn <jannh@google.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Nicolai Stange <nstange@suse.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Qian Cai <cai@lca.pw>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190414160145.241588113@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/page_64_types.h')
| -rw-r--r-- | arch/x86/include/asm/page_64_types.h | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/include/asm/page_64_types.h b/arch/x86/include/asm/page_64_types.h index 6ab2c54c1bf9..056de887b220 100644 --- a/arch/x86/include/asm/page_64_types.h +++ b/arch/x86/include/asm/page_64_types.h @@ -27,11 +27,10 @@ /* * 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 +#define IST_INDEX_DF 0 +#define IST_INDEX_NMI 1 +#define IST_INDEX_DB 2 +#define IST_INDEX_MCE 3 /* * Set __PAGE_OFFSET to the most negative possible address + |