ARM: 8927/1: ARM/hw_breakpoint: add more ARMv8 debug architecture versions support
When ARMv8 cores are used in AArch32 mode, arch_hw_breakpoint_init() in arch/arm/kernel/hw_breakpoint.c will be used. From ARMv8 specification, v8 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. * 1001 ARMv8.4, v8.4 Debug architecture. So missing ARMv8.1/ARMv8.2/ARMv8.4 cases will cause enable_monitor_mode() returns -ENODEV,and eventually arch_hw_breakpoint_init() will fail. Signed-off-by: Candle Sun <candle.sun@unisoc.com> Signed-off-by: Nianfu Bai <nianfu.bai@unisoc.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
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@ -53,6 +53,9 @@ static inline void decode_ctrl_reg(u32 reg,
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#define ARM_DEBUG_ARCH_V7_MM 4
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#define ARM_DEBUG_ARCH_V7_1 5
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#define ARM_DEBUG_ARCH_V8 6
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#define ARM_DEBUG_ARCH_V8_1 7
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#define ARM_DEBUG_ARCH_V8_2 8
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#define ARM_DEBUG_ARCH_V8_4 9
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/* Breakpoint */
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#define ARM_BREAKPOINT_EXECUTE 0
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@ -246,6 +246,9 @@ static int enable_monitor_mode(void)
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case ARM_DEBUG_ARCH_V7_ECP14:
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case ARM_DEBUG_ARCH_V7_1:
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case ARM_DEBUG_ARCH_V8:
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case ARM_DEBUG_ARCH_V8_1:
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case ARM_DEBUG_ARCH_V8_2:
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case ARM_DEBUG_ARCH_V8_4:
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ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN));
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isb();
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break;
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