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arm64: debug: fix mdscr.ss check when enabling debug exceptions 

When we take an exception at EL1, we only want to enable debug
exceptions if we're not currently stepping, otherwise we can easily get
stuck in a loop stepping into interrupt handlers.

Unfortunately, the current code tests the wrong bit in the mdscr, so fix
that.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Will Deacon 2013-05-17 17:41:22 +01:00 committed by Catalin Marinas
parent 02e3cba685
commit 3126976be6
1 changed files with 1 additions and 1 deletions
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2
arch/arm64/include/asm/assembler.h
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@ -82,7 +82,7 @@
.macro enable_dbg_if_not_stepping, tmp
mrs \tmp, mdscr_el1
tbnz \tmp, #1, 9990f
tbnz \tmp, #0, 9990f
enable_dbg
9990:
.endm