Re: [Qemu-devel] [PATCH v3 1/2] Guest debugging support for KVM

[Blue Swirl]

On 3/8/09, Jan Kiszka <address@hidden> wrote:
> This is a backport of the guest debugging support for the KVM
>  accelerator that is now part of the KVM tree. It implements the reworked
>  KVM kernel API for guest debugging (KVM_CAP_SET_GUEST_DEBUG) which is
>  not yet part of any mainline kernel but will probably be 2.6.30 stuff.
>  So far supported is x86, but PPC is expected to catch up soon.
>
>  Core features are:
>   - unlimited soft-breakpoints via code patching
>   - hardware-assisted x86 breakpoints and watchpoints

The statically dimensioned arrays (hw_breakpoint[4], single
hw_watchpoint) make me wonder what would happen in the SMP case. Or is
only one CPU ever targeted at a time for debugging?