Re: [PATCH v2 6/6] KVM: x86: Update vPMCs when retiring branch instructions
From: Jim Mattson <hidden>
Date: 2021-12-09 04:40:31
Also in:
lkml
On Mon, Nov 29, 2021 at 11:42 PM Like Xu [off-list ref] wrote:
From: Jim Mattson <redacted>
When KVM retires a guest branch instruction through emulation,
increment any vPMCs that are configured to monitor "branch
instructions retired," and update the sample period of those counters
so that they will overflow at the right time.
Signed-off-by: Eric Hankland <redacted>
[jmattson:
- Split the code to increment "branch instructions retired" into a
separate commit.
- Moved/consolidated the calls to kvm_pmu_trigger_event() in the
emulation of VMLAUNCH/VMRESUME to accommodate the evolution of
that code.
]
Fixes: f5132b01386b ("KVM: Expose a version 2 architectural PMU to a guests")
Signed-off-by: Jim Mattson <redacted>I'm not sure if this is appropriate, but... Reviewed-by: Jim Mattson <redacted>