diff options
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 31 |
1 files changed, 10 insertions, 21 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index d72c818b019c..51c762156099 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -216,12 +216,6 @@ alternative_else_nop_endif .else add x21, sp, #S_FRAME_SIZE get_current_task tsk - /* Save the task's original addr_limit and set USER_DS */ - ldr x20, [tsk, #TSK_TI_ADDR_LIMIT] - str x20, [sp, #S_ORIG_ADDR_LIMIT] - mov x20, #USER_DS - str x20, [tsk, #TSK_TI_ADDR_LIMIT] - /* No need to reset PSTATE.UAO, hardware's already set it to 0 for us */ .endif /* \el == 0 */ mrs x22, elr_el1 mrs x23, spsr_el1 @@ -279,12 +273,6 @@ alternative_else_nop_endif .macro kernel_exit, el .if \el != 0 disable_daif - - /* Restore the task's original addr_limit. */ - ldr x20, [sp, #S_ORIG_ADDR_LIMIT] - str x20, [tsk, #TSK_TI_ADDR_LIMIT] - - /* No need to restore UAO, it will be restored from SPSR_EL1 */ .endif /* Restore pmr */ @@ -438,7 +426,7 @@ SYM_CODE_END(__swpan_exit_el0) #ifdef CONFIG_SHADOW_CALL_STACK /* also switch to the irq shadow stack */ - adr_this_cpu scs_sp, irq_shadow_call_stack, x26 + ldr_this_cpu scs_sp, irq_shadow_call_stack_ptr, x26 #endif 9998: @@ -773,9 +761,10 @@ SYM_CODE_END(ret_to_user) */ .pushsection ".entry.tramp.text", "ax" + // Move from tramp_pg_dir to swapper_pg_dir .macro tramp_map_kernel, tmp mrs \tmp, ttbr1_el1 - add \tmp, \tmp, #(PAGE_SIZE + RESERVED_TTBR0_SIZE) + add \tmp, \tmp, #(2 * PAGE_SIZE) bic \tmp, \tmp, #USER_ASID_FLAG msr ttbr1_el1, \tmp #ifdef CONFIG_QCOM_FALKOR_ERRATUM_1003 @@ -792,9 +781,10 @@ alternative_else_nop_endif #endif /* CONFIG_QCOM_FALKOR_ERRATUM_1003 */ .endm + // Move from swapper_pg_dir to tramp_pg_dir .macro tramp_unmap_kernel, tmp mrs \tmp, ttbr1_el1 - sub \tmp, \tmp, #(PAGE_SIZE + RESERVED_TTBR0_SIZE) + sub \tmp, \tmp, #(2 * PAGE_SIZE) orr \tmp, \tmp, #USER_ASID_FLAG msr ttbr1_el1, \tmp /* @@ -965,10 +955,9 @@ SYM_CODE_START(__sdei_asm_entry_trampoline) mov x4, xzr /* - * Use reg->interrupted_regs.addr_limit to remember whether to unmap - * the kernel on exit. + * Remember whether to unmap the kernel on exit. */ -1: str x4, [x1, #(SDEI_EVENT_INTREGS + S_ORIG_ADDR_LIMIT)] +1: str x4, [x1, #(SDEI_EVENT_INTREGS + S_SDEI_TTBR1)] #ifdef CONFIG_RANDOMIZE_BASE adr x4, tramp_vectors + PAGE_SIZE @@ -989,7 +978,7 @@ NOKPROBE(__sdei_asm_entry_trampoline) * x4: struct sdei_registered_event argument from registration time. */ SYM_CODE_START(__sdei_asm_exit_trampoline) - ldr x4, [x4, #(SDEI_EVENT_INTREGS + S_ORIG_ADDR_LIMIT)] + ldr x4, [x4, #(SDEI_EVENT_INTREGS + S_SDEI_TTBR1)] cbnz x4, 1f tramp_unmap_kernel tmp=x4 @@ -1063,9 +1052,9 @@ SYM_CODE_START(__sdei_asm_handler) #ifdef CONFIG_SHADOW_CALL_STACK /* Use a separate shadow call stack for normal and critical events */ cbnz w4, 3f - adr_this_cpu dst=scs_sp, sym=sdei_shadow_call_stack_normal, tmp=x6 + ldr_this_cpu dst=scs_sp, sym=sdei_shadow_call_stack_normal_ptr, tmp=x6 b 4f -3: adr_this_cpu dst=scs_sp, sym=sdei_shadow_call_stack_critical, tmp=x6 +3: ldr_this_cpu dst=scs_sp, sym=sdei_shadow_call_stack_critical_ptr, tmp=x6 4: #endif |