qiurui
/
Centos-kernel-stream-9
mirror of https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
Centos-kernel-stream-9/include/kvm
History
Andrew Jones 3a4e688c4f KVM: arm64: Fix PMU probe ordering 
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2009341

commit e840f42a49925707fca90e6c7a4095118fdb8c4d
Author: Marc Zyngier <maz@kernel.org>
Date:   Sun Sep 19 14:09:49 2021 +0100

    KVM: arm64: Fix PMU probe ordering

    Russell reported that since 5.13, KVM's probing of the PMU has
    started to fail on his HW. As it turns out, there is an implicit
    ordering dependency between the architectural PMU probing code and
    and KVM's own probing. If, due to probe ordering reasons, KVM probes
    before the PMU driver, it will fail to detect the PMU and prevent it
    from being advertised to guests as well as the VMM.

    Obviously, this is one probing too many, and we should be able to
    deal with any ordering.

    Add a callback from the PMU code into KVM to advertise the registration
    of a host CPU PMU, allowing for any probing order.

    Fixes: 5421db1be3 ("KVM: arm64: Divorce the perf code from oprofile helpers")
    Reported-by: "Russell King (Oracle)" <linux@armlinux.org.uk>
    Tested-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
    Signed-off-by: Marc Zyngier <maz@kernel.org>
    Link: https://lore.kernel.org/r/YUYRKVflRtUytzy5@shell.armlinux.org.uk
    Cc: stable@vger.kernel.org

Signed-off-by: Andrew Jones <drjones@redhat.com>
 		2022-01-17 07:35:36 +00:00
..
arm_arch_timer.h KVM: arm64: timers: Move timer registers to the sys_regs file 2020-07-07 09:28:38 +01:00
arm_hypercalls.h KVM: arm/arm64: Factor out hypercall handling from PSCI code 2019-10-21 19:20:26 +01:00
arm_pmu.h KVM: arm64: Fix PMU probe ordering 2022-01-17 07:35:36 +00:00
arm_psci.h KVM: arm/arm64: Factor out hypercall handling from PSCI code 2019-10-21 19:20:26 +01:00
arm_vgic.h KVM: arm64: vgic: Implement SW-driven deactivation 2021-06-01 10:46:00 +01:00
iodev.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 342 2019-06-05 17:37:07 +02:00