From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Tue, 28 Jan 2014 18:38:51 +0000 Subject: [PATCH v2] ARM: hw_breakpoint: Add ARMv8 support In-Reply-To: <1390933583-1278-1-git-send-email-cov@codeaurora.org> References: <1390415365-17230-1-git-send-email-cov@codeaurora.org> <1390933583-1278-1-git-send-email-cov@codeaurora.org> Message-ID: <20140128183851.GK2885@mudshark.cambridge.arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Jan 28, 2014 at 06:26:23PM +0000, Christopher Covington wrote: > Add the trivial support necessary to get hardware breakpoints > working for GDB on ARMv8 simulators running in AArch32 mode. > > Signed-off-by: Christopher Covington > --- > > v2: modify debug_exception_updates_fsr > > arch/arm/include/asm/hw_breakpoint.h | 1 + > arch/arm/kernel/hw_breakpoint.c | 3 ++- > 2 files changed, 3 insertions(+), 1 deletion(-) > > diff --git a/arch/arm/include/asm/hw_breakpoint.h b/arch/arm/include/asm/hw_breakpoint.h > index eef55ea..8e427c7 100644 > --- a/arch/arm/include/asm/hw_breakpoint.h > +++ b/arch/arm/include/asm/hw_breakpoint.h > @@ -51,6 +51,7 @@ static inline void decode_ctrl_reg(u32 reg, > #define ARM_DEBUG_ARCH_V7_ECP14 3 > #define ARM_DEBUG_ARCH_V7_MM 4 > #define ARM_DEBUG_ARCH_V7_1 5 > +#define ARM_DEBUG_ARCH_V8 6 > > /* Breakpoint */ > #define ARM_BREAKPOINT_EXECUTE 0 > diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c > index 3d44660..a711b27 100644 > --- a/arch/arm/kernel/hw_breakpoint.c > +++ b/arch/arm/kernel/hw_breakpoint.c > @@ -167,7 +167,7 @@ static int debug_arch_supported(void) > /* Can we determine the watchpoint access type from the fsr? */ > static int debug_exception_updates_fsr(void) > { > - return 0; > + return get_debug_arch() == ARM_DEBUG_ARCH_V8; I'd probably make that >= to save on future changes. With that change: Acked-by: Will Deacon Will