[PATCH 2/7] KVM: arm: guest debug, define API headers

Paolo Bonzini pbonzini at redhat.com
Tue Nov 25 09:22:32 PST 2014

On 25/11/2014 18:13, Peter Maydell wrote:
> On 25 November 2014 at 17:05, Paolo Bonzini <pbonzini at redhat.com> wrote:
>> > So there is no register that says "this breakpoint has triggered" or
>> > "this watchpoint has triggered"?
> Nope. You take a debug exception; the syndrome register tells
> you if it was a bp or a wp, and if it was a wp the fault address
> register tells you the address being accessed (if it was a bp
> you know the program counter, obviously). The debugger is expected
> to be able to figure it out from there, if it cares.

That's already good enough---do the KVM_DEBUG_EXIT_* constants match the
syndrome register, or if not why?


More information about the linux-arm-kernel mailing list