Messages in this thread Patch in this message | | | From | Max Filippov <> | Subject | [PATCH] xtensa: rearrange NMI exit path | Date | Sat, 19 Mar 2022 13:12:54 -0700 |
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NMI exit path to userspace should neither check TIF_DB_DISABLED nor call check_tlb_sanity because NMI shouldn't touch anything related to userspace. Drop kernel/userspace check in NMI exit path.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> --- arch/xtensa/kernel/entry.S | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index 77a7c8da3ff5..8d671898d582 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -488,9 +488,10 @@ KABI_W or a3, a3, a2 common_exception_return: #if XTENSA_FAKE_NMI - l32i a2, a1, PT_EXCCAUSE - movi a3, EXCCAUSE_MAPPED_NMI - beq a2, a3, .LNMIexit + l32i abi_tmp0, a1, PT_EXCCAUSE + movi abi_tmp1, EXCCAUSE_MAPPED_NMI + l32i abi_saved1, a1, PT_PS + beq abi_tmp0, abi_tmp1, 4f #endif 1: irq_save a2, a3 @@ -550,12 +551,6 @@ common_exception_return: j 4f #endif -#if XTENSA_FAKE_NMI -.LNMIexit: - l32i abi_saved1, a1, PT_PS - _bbci.l abi_saved1, PS_UM_BIT, 4f -#endif - 5: #ifdef CONFIG_HAVE_HW_BREAKPOINT _bbci.l a4, TIF_DB_DISABLED, 7f -- 2.30.2
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