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 <[email protected]>
Signed-off-by: Alexey Kardashevskiy <[email protected]>
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.
--
Alexey
