diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-05-21 22:05:28 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 15:15:09 +0200 |
| commit | 91eeafea1e4b7c95cc4f38af186d7d48fceef89a (patch) | |
| tree | e7d395973be4df9527769a73cedcb99d1c835ce4 /arch/x86/entry/entry_64.S | |
| parent | 00cf8baf9c2af3c17f9d77bb9d07d44d330d0df2 (diff) | |
x86/entry: Switch page fault exception to IDTENTRY_RAW
Convert page fault exceptions to IDTENTRY_RAW:
- Implement the C entry point with DEFINE_IDTENTRY_RAW
- Add the CR2 read into the exception handler
- Add the idtentry_enter/exit_cond_rcu() invocations in
in the regular page fault handler and in the async PF
part.
- Emit the ASM stub with DECLARE_IDTENTRY_RAW
- Remove the ASM idtentry in 64-bit
- Remove the CR2 read from 64-bit
- Remove the open coded ASM entry code in 32-bit
- Fix up the XEN/PV code
- Remove the old prototypes
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lore.kernel.org/r/20200521202118.238455120@linutronix.de
Diffstat (limited to 'arch/x86/entry/entry_64.S')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 19 |
1 files changed, 0 insertions, 19 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index b70c7788ef08..5789f76932b6 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -506,15 +506,6 @@ SYM_CODE_END(spurious_entries_start) call error_entry UNWIND_HINT_REGS - .if \vector == X86_TRAP_PF - /* - * Store CR2 early so subsequent faults cannot clobber it. Use R12 as - * intermediate storage as RDX can be clobbered in enter_from_user_mode(). - * GET_CR2_INTO can clobber RAX. - */ - GET_CR2_INTO(%r12); - .endif - .if \sane == 0 TRACE_IRQS_OFF @@ -533,10 +524,6 @@ SYM_CODE_END(spurious_entries_start) movq $-1, ORIG_RAX(%rsp) /* no syscall to restart */ .endif - .if \vector == X86_TRAP_PF - movq %r12, %rdx /* Move CR2 into 3rd argument */ - .endif - call \cfunc .if \sane == 0 @@ -1060,12 +1047,6 @@ apicinterrupt IRQ_WORK_VECTOR irq_work_interrupt smp_irq_work_interrupt #endif /* - * Exception entry points. - */ - -idtentry X86_TRAP_PF page_fault do_page_fault has_error_code=1 - -/* * Reload gs selector with exception handling * edi: new selector * |