[PATCH 2/3] KVM: PPC: Book3S HV: Signed extend decrementer value if not using large decr

[Michael Ellerman]

On Thu, 2019-06-20 at 01:46:50 UTC, Suraj Jitindar Singh wrote:
> On POWER9 the decrementer can operate in large decrementer mode where
> the decrementer is 56 bits and signed extended to 64 bits. When not
> operating in this mode the decrementer behaves as a 32 bit decrementer
> which is NOT signed extended (as on POWER8).
> 
> Currently when reading a guest decrementer value we don't take into
> account whether the large decrementer is enabled or not, and this means
> the value will be incorrect when the guest is not using the large
> decrementer. Fix this by sign extending the value read when the guest
> isn't using the large decrementer.
> 
> Fixes: 95a6432ce903 "KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests"
> 
> Signed-off-by: Suraj Jitindar Singh <sjitindarsingh at gmail.com>
> Tested-by: Laurent Vivier <lvivier at redhat.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/869537709ebf1dc865e75c3fc97b23f8acf37c16

cheers