On Sun, Sep 06, 2015 at 04:14:25PM +1000, Alexey Kardashevskiy wrote: > On 09/04/2015 02:48 PM, David Gibson wrote: > >On Wed, Sep 02, 2015 at 07:29:58PM +1000, Alexey Kardashevskiy wrote: > >>For setting debug watchpoints, sPAPR guests use H_SET_MODE hypercall. > >>The existing QEMU H_SET_MODE handler does not support this but > >>the KVM handler in HV KVM does. However it is not enabled. > >> > >>This enables the in-kernel H_SET_MODE handler which handles: > >>- Completed Instruction Address Breakpoint Register > >>- Watch point 0 registers. > >> > >>The rest is still handled in QEMU. > >> > >>Reported-by: Anton Blanchard <an...@samba.org> > >>Signed-off-by: Alexey Kardashevskiy <a...@ozlabs.ru> > > > >Applied to spapr-dev; I'll move it into spapr-next once it's had a > >little more testing. > > Another thing to keep in mind is that at some point in the past the host > kernel used to handle H_SET_MODE and QEMU did not have the handler at all, > now this functionality is in QEMU but some RHEL kernel could have picked a > kernel with the in-kernel handler.
Not one that's supported as a KVM host, I believe.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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