From: Candle Sun <candlesea@gmail.com>
To: will@kernel.org, mark.rutland@arm.com, linux@armlinux.org.uk
Cc: Nianfu Bai <nianfu.bai@unisoc.com>,
Candle Sun <candle.sun@unisoc.com>,
orson.zhai@unisoc.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] ARM/hw_breakpoint: add more ARMv8 debug architecture versions support
Date: Thu, 24 Oct 2019 16:05:39 +0800 [thread overview]
Message-ID: <20191024080539.9187-1-candlesea@gmail.com> (raw)
From: Candle Sun <candle.sun@unisoc.com>
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>
---
Changes in v2:
- Add ARMv8.4 debug architecture case
- Update patch description
---
arch/arm/include/asm/hw_breakpoint.h | 3 +++
arch/arm/kernel/hw_breakpoint.c | 3 +++
2 files changed, 6 insertions(+)
diff --git a/arch/arm/include/asm/hw_breakpoint.h b/arch/arm/include/asm/hw_breakpoint.h
index ac54c06764e6..62358d3ca0a8 100644
--- a/arch/arm/include/asm/hw_breakpoint.h
+++ b/arch/arm/include/asm/hw_breakpoint.h
@@ -53,6 +53,9 @@ 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
+#define ARM_DEBUG_ARCH_V8_4 9
/* Breakpoint */
#define ARM_BREAKPOINT_EXECUTE 0
diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c
index b0c195e3a06d..02ca7adf5375 100644
--- a/arch/arm/kernel/hw_breakpoint.c
+++ b/arch/arm/kernel/hw_breakpoint.c
@@ -246,6 +246,9 @@ static int enable_monitor_mode(void)
case ARM_DEBUG_ARCH_V7_ECP14:
case ARM_DEBUG_ARCH_V7_1:
case ARM_DEBUG_ARCH_V8:
+ case ARM_DEBUG_ARCH_V8_1:
+ case ARM_DEBUG_ARCH_V8_2:
+ case ARM_DEBUG_ARCH_V8_4:
ARM_DBG_WRITE(c0, c2, 2, (dscr | ARM_DSCR_MDBGEN));
isb();
break;
--
2.17.1
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next reply other threads:[~2019-10-24 8:06 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 8:05 Candle Sun [this message]
2019-10-28 10:59 ` [PATCH v2] ARM/hw_breakpoint: add more ARMv8 debug architecture versions support Will Deacon
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