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| author | Will Deacon <will.deacon@arm.com> | 2013-05-17 17:41:22 +0100 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2013-05-17 18:24:19 +0100 |
| commit | 3126976be64bfb4c87297cb022ca815212079aec (patch) | |
| tree | 57b76f1074134c968d930e99a3346ebb3484c0d6 /arch/arm64 | |
| parent | 02e3cba685efe61f0c3b10f1622c6a229ac93a61 (diff) | |
| download | linux-3.10-3126976be64bfb4c87297cb022ca815212079aec.tar.gz linux-3.10-3126976be64bfb4c87297cb022ca815212079aec.tar.bz2 linux-3.10-3126976be64bfb4c87297cb022ca815212079aec.zip | |
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>
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/assembler.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index c8eedc60498..5aceb83b3f5 100644 --- a/arch/arm64/include/asm/assembler.h +++ b/arch/arm64/include/asm/assembler.h @@ -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 |