diff options
Diffstat (limited to 'arch/arm64/include/asm/assembler.h')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 51 |
1 files changed, 32 insertions, 19 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index d58a6253c6ab..aef72d886677 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -25,12 +25,41 @@ #include <asm/asm-offsets.h> #include <asm/cpufeature.h> +#include <asm/debug-monitors.h> #include <asm/mmu_context.h> #include <asm/page.h> #include <asm/pgtable-hwdef.h> #include <asm/ptrace.h> #include <asm/thread_info.h> + .macro save_and_disable_daif, flags + mrs \flags, daif + msr daifset, #0xf + .endm + + .macro disable_daif + msr daifset, #0xf + .endm + + .macro enable_daif + msr daifclr, #0xf + .endm + + .macro restore_daif, flags:req + msr daif, \flags + .endm + + /* Only on aarch64 pstate, PSR_D_BIT is different for aarch32 */ + .macro inherit_daif, pstate:req, tmp:req + and \tmp, \pstate, #(PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT) + msr daif, \tmp + .endm + + /* IRQ is the lowest priority flag, unconditionally unmask the rest. */ + .macro enable_da_f + msr daifclr, #(8 | 4 | 1) + .endm + /* * Enable and disable interrupts. */ @@ -51,13 +80,6 @@ msr daif, \flags .endm -/* - * Enable and disable debug exceptions. - */ - .macro disable_dbg - msr daifset, #8 - .endm - .macro enable_dbg msr daifclr, #8 .endm @@ -65,31 +87,22 @@ .macro disable_step_tsk, flgs, tmp tbz \flgs, #TIF_SINGLESTEP, 9990f mrs \tmp, mdscr_el1 - bic \tmp, \tmp, #1 + bic \tmp, \tmp, #DBG_MDSCR_SS msr mdscr_el1, \tmp isb // Synchronise with enable_dbg 9990: .endm + /* call with daif masked */ .macro enable_step_tsk, flgs, tmp tbz \flgs, #TIF_SINGLESTEP, 9990f - disable_dbg mrs \tmp, mdscr_el1 - orr \tmp, \tmp, #1 + orr \tmp, \tmp, #DBG_MDSCR_SS msr mdscr_el1, \tmp 9990: .endm /* - * Enable both debug exceptions and interrupts. This is likely to be - * faster than two daifclr operations, since writes to this register - * are self-synchronising. - */ - .macro enable_dbg_and_irq - msr daifclr, #(8 | 2) - .endm - -/* * SMP data memory barrier */ .macro smp_dmb, opt |