From: Will Deacon Date: Fri, 17 May 2013 16:41:22 +0000 (+0100) Subject: arm64: debug: fix mdscr.ss check when enabling debug exceptions X-Git-Tag: accepted/tizen/common/20141203.182822~2219^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3126976be64bfb4c87297cb022ca815212079aec;p=platform%2Fkernel%2Flinux-arm64.git 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 Signed-off-by: Catalin Marinas --- diff --git a/arch/arm64/include/asm/assembler.h b/arch/arm64/include/asm/assembler.h index c8eedc6..5aceb83 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