diff options
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 42 |
1 files changed, 4 insertions, 38 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 05b9f03f3e00..156c4e3fd1a4 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -720,14 +720,9 @@ el0_sync_compat: b.ge el0_dbg b el0_inv el0_svc_compat: - /* - * AArch32 syscall handling - */ - ldr x16, [tsk, #TSK_TI_FLAGS] // load thread flags - adrp stbl, compat_sys_call_table // load compat syscall table pointer - mov wscno, w7 // syscall number in w7 (r7) - mov wsc_nr, #__NR_compat_syscalls - b el0_svc_naked + mov x0, sp + bl el0_svc_compat_handler + b ret_to_user .align 6 el0_irq_compat: @@ -925,37 +920,8 @@ ENDPROC(ret_to_user) */ .align 6 el0_svc: - ldr x16, [tsk, #TSK_TI_FLAGS] // load thread flags - adrp stbl, sys_call_table // load syscall table pointer - mov wscno, w8 // syscall number in w8 - mov wsc_nr, #__NR_syscalls - -#ifdef CONFIG_ARM64_SVE -alternative_if_not ARM64_SVE - b el0_svc_naked -alternative_else_nop_endif - tbz x16, #TIF_SVE, el0_svc_naked // Skip unless TIF_SVE set: - bic x16, x16, #_TIF_SVE // discard SVE state - str x16, [tsk, #TSK_TI_FLAGS] - - /* - * task_fpsimd_load() won't be called to update CPACR_EL1 in - * ret_to_user unless TIF_FOREIGN_FPSTATE is still set, which only - * happens if a context switch or kernel_neon_begin() or context - * modification (sigreturn, ptrace) intervenes. - * So, ensure that CPACR_EL1 is already correct for the fast-path case: - */ - mrs x9, cpacr_el1 - bic x9, x9, #CPACR_EL1_ZEN_EL0EN // disable SVE for el0 - msr cpacr_el1, x9 // synchronised by eret to el0 -#endif - -el0_svc_naked: // compat entry point mov x0, sp - mov w1, wscno - mov w2, wsc_nr - mov x3, stbl - bl el0_svc_common + bl el0_svc_handler b ret_to_user ENDPROC(el0_svc) |