On Thu, Sep 26, 2019 at 03:38:28PM +0800, Candle Sun wrote: > From: Candle Sun <candle....@unisoc.com> > > When ARMv8.1/ARMv8.2 cores are used in AArch32 mode, > arch_hw_breakpoint_init() in arch/arm/kernel/hw_breakpoint.c will be used. > > From ARMv8 specification, different debug architecture versions defined: > * 0110 ARMv8, v8 Debug architecture. > * 0111 ARMv8.1, v8 Debug architecture, with Virtualization Host Extensions. > * 1000 ARMv8.2, v8.2 Debug architecture. > > So missing ARMv8.1/ARMv8.2 cases will cause enable_monitor_mode() function > returns -ENODEV, and arch_hw_breakpoint_init() will fail. > > Signed-off-by: Candle Sun <candle....@unisoc.com> > Signed-off-by: Nianfu Bai <nianfu....@unisoc.com> > --- > arch/arm/include/asm/hw_breakpoint.h | 2 ++ > arch/arm/kernel/hw_breakpoint.c | 2 ++ > 2 files changed, 4 insertions(+)
[...] > diff --git a/arch/arm/include/asm/hw_breakpoint.h > b/arch/arm/include/asm/hw_breakpoint.h > index ac54c06..9137ef6 100644 > --- a/arch/arm/include/asm/hw_breakpoint.h > +++ b/arch/arm/include/asm/hw_breakpoint.h > @@ -53,6 +53,8 @@ static inline void decode_ctrl_reg(u32 reg, > #define ARM_DEBUG_ARCH_V7_MM 4 > #define ARM_DEBUG_ARCH_V7_1 5 > #define ARM_DEBUG_ARCH_V8 6 > +#define ARM_DEBUG_ARCH_V8_1 7 > +#define ARM_DEBUG_ARCH_V8_2 8 Looks like you can also add: #define ARM_DEBUG_ARCH_V8_4 9 and treat that the same way. With that, and a fix to $SUBJECT: Acked-by: Will Deacon <w...@kernel.org> Please put this into the patch system [1]. Will [1] https://www.arm.linux.org.uk/developer/patches/
