On Thu, Sep 26, 2019 at 03:38:28PM +0800, Candle Sun wrote:

From: Candle Sun <redacted>

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 <redacted>
Signed-off-by: Nianfu Bai <redacted>
---
 arch/arm/include/asm/hw_breakpoint.h | 2 ++
 arch/arm/kernel/hw_breakpoint.c      | 2 ++
 2 files changed, 4 insertions(+)

How did you test this?

Will

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