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arm64: Use existing defines for mdscr

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Literal values are being used to set single stepping in mdscr from assembly
code. There are already existing defines representing those values, use
those instead of the literal values.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
Julien Thierry 2017-10-25 10:04:32 +01:00 • committed by Will Deacon
parent 9ca255bf04
commit e28cc02559
1 changed files with 3 additions and 2 deletions
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5
arch/arm64/include/asm/assembler.h
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@ -25,6 +25,7 @@
#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>
@ -65,7 +66,7 @@
.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:
@ -75,7 +76,7 @@
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