Hi Christopher, On Wed, Jan 22, 2014 at 06:29:25PM +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 <c...@codeaurora.org> > --- > arch/arm/include/asm/hw_breakpoint.h | 1 + > arch/arm/kernel/hw_breakpoint.c | 1 + > 2 files changed, 2 insertions(+) > > 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..45fbcaf 100644 > --- a/arch/arm/kernel/hw_breakpoint.c > +++ b/arch/arm/kernel/hw_breakpoint.c > @@ -257,6 +257,7 @@ static int enable_monitor_mode(void) > break; > case ARM_DEBUG_ARCH_V7_ECP14: > case ARM_DEBUG_ARCH_V7_1: > + case ARM_DEBUG_ARCH_V8: > ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN)); > isb(); > break;
I'm slightly uneasy about this, mainly because I've not spent much time looking at the AArch32 side of ARMv8 debug and I know that a fair amount has changed since 7.1. Furthermore, the arch/arm/ kernel hasn't grown any v8 features yet and it's not clear whether that's a road down which people wish to take it. Anyway, assuming this works, can you please update debug_exception_updates_fsr to return true for ARMv8 cores? Will -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
