[PATCH 2/2] KVM: arm64: Match PMU error code descriptions with error conditions

[Andrew Jones]

On Mon, Sep 21, 2020 at 03:30:24PM +0100, Alexandru Elisei wrote:
> Hi Andrew,
> 
> Thank you for having a look at this.
> 
> On 9/21/20 3:17 PM, Andrew Jones wrote:
> 
> > On Mon, Sep 21, 2020 at 02:08:38PM +0100, Alexandru Elisei wrote:
> >> Update the description of the PMU KVM_{GET, SET}_DEVICE_ATTR error codes
> >> to be a better match for the code that returns them.
> >>
> >> Signed-off-by: Alexandru Elisei <alexandru.elisei at arm.com>
> >> ---
> >>  Documentation/virt/kvm/devices/vcpu.rst | 8 ++++----
> >>  1 file changed, 4 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/Documentation/virt/kvm/devices/vcpu.rst b/Documentation/virt/kvm/devices/vcpu.rst
> >> index 96d6cf77cb1e..5b8db30c61db 100644
> >> --- a/Documentation/virt/kvm/devices/vcpu.rst
> >> +++ b/Documentation/virt/kvm/devices/vcpu.rst
> >> @@ -26,8 +26,8 @@ Returns:
> >>  	 =======  ========================================================
> >>  	 -EBUSY   The PMU overflow interrupt is already set
> >>  	 -EFAULT  Error reading interrupt number
> >> -	 -ENXIO   The overflow interrupt not set when attempting to get it
> >> -	 -ENODEV  PMUv3 not supported
> >> +	 -ENXIO   PMUv3 not supported
> > I think -ENXIO matched the code better before the change.
> 
> KVM_SET_DEVICE_ATTR for KVM_ARM_VCPU_PMU_V3_IRQ returns -ENXIO if
> CONFIG_KVM_ARM_PMU is not set (in include/kvm/arm_pmu.h).
> 
> But I think I understand what you mean, you're referring to
> kvm_arm_pmu_v3_get_attr(), which returns -ENXIO if the irq number was not set. I
> can change the description to "PMUv3 not supported or the overflow interrupt not
> set when attempting to get it", what do you think?
>

Works for me.

Thanks,
drew