diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2019-04-14 17:59:49 +0200 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2019-04-17 13:00:22 +0200 |
| commit | 7623f37e411156e6e09b95cf5c76e509c5fda640 (patch) | |
| tree | 4453bae0400beefac913febe3d0d75112ab5224f /arch/x86/include/asm/cpu_entry_area.h | |
| parent | a4af767ae59cc579569bbfe49513a0037d5989ee (diff) | |
| download | linux-stable-7623f37e411156e6e09b95cf5c76e509c5fda640.tar.gz linux-stable-7623f37e411156e6e09b95cf5c76e509c5fda640.tar.bz2 linux-stable-7623f37e411156e6e09b95cf5c76e509c5fda640.zip | |
x86/cpu_entry_area: Provide exception stack accessor
Store a pointer to the per cpu entry area exception stack mappings to allow
fast retrieval.
Required for converting various places from using the shadow IST array to
directly doing address calculations on the actual mapping address.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sean Christopherson <sean.j.christopherson@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/20190414160144.680960459@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/cpu_entry_area.h')
| -rw-r--r-- | arch/x86/include/asm/cpu_entry_area.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/include/asm/cpu_entry_area.h b/arch/x86/include/asm/cpu_entry_area.h index af8c312673de..9b406f067ecf 100644 --- a/arch/x86/include/asm/cpu_entry_area.h +++ b/arch/x86/include/asm/cpu_entry_area.h @@ -99,6 +99,7 @@ struct cpu_entry_area { #define CPU_ENTRY_AREA_TOT_SIZE (CPU_ENTRY_AREA_SIZE * NR_CPUS) DECLARE_PER_CPU(struct cpu_entry_area *, cpu_entry_area); +DECLARE_PER_CPU(struct cea_exception_stacks *, cea_exception_stacks); extern void setup_cpu_entry_areas(void); extern void cea_set_pte(void *cea_vaddr, phys_addr_t pa, pgprot_t flags); @@ -118,4 +119,7 @@ static inline struct entry_stack *cpu_entry_stack(int cpu) return &get_cpu_entry_area(cpu)->entry_stack_page.stack; } +#define __this_cpu_ist_top_va(name) \ + CEA_ESTACK_TOP(__this_cpu_read(cea_exception_stacks), name) + #endif |