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H A Dpmu-emul.cec3eb9ed6081bea8ebf603ff545dba127071b928 Sat Aug 19 04:39:44 UTC 2023 Reiji Watanabe <reijiw@google.com> KVM: arm64: PMU: Disallow vPMU on non-uniform PMUVer

Disallow userspace from configuring vPMU for guests on systems
where the PMUVer is not uniform across all PEs.
KVM has not been advertising PMUv3 to the guests with vPMU on
such systems anyway, and such systems would be extremely
uncommon and unlikely to even use KVM.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230819043947.4100985-2-reijiw@google.com
ec3eb9ed6081bea8ebf603ff545dba127071b928 Sat Aug 19 04:39:44 UTC 2023 Reiji Watanabe <reijiw@google.com> KVM: arm64: PMU: Disallow vPMU on non-uniform PMUVer

Disallow userspace from configuring vPMU for guests on systems
where the PMUVer is not uniform across all PEs.
KVM has not been advertising PMUv3 to the guests with vPMU on
such systems anyway, and such systems would be extremely
uncommon and unlikely to even use KVM.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230819043947.4100985-2-reijiw@google.com
ec3eb9ed6081bea8ebf603ff545dba127071b928 Sat Aug 19 04:39:44 UTC 2023 Reiji Watanabe <reijiw@google.com> KVM: arm64: PMU: Disallow vPMU on non-uniform PMUVer

Disallow userspace from configuring vPMU for guests on systems
where the PMUVer is not uniform across all PEs.
KVM has not been advertising PMUv3 to the guests with vPMU on
such systems anyway, and such systems would be extremely
uncommon and unlikely to even use KVM.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230819043947.4100985-2-reijiw@google.com
ec3eb9ed6081bea8ebf603ff545dba127071b928 Sat Aug 19 04:39:44 UTC 2023 Reiji Watanabe <reijiw@google.com> KVM: arm64: PMU: Disallow vPMU on non-uniform PMUVer

Disallow userspace from configuring vPMU for guests on systems
where the PMUVer is not uniform across all PEs.
KVM has not been advertising PMUv3 to the guests with vPMU on
such systems anyway, and such systems would be extremely
uncommon and unlikely to even use KVM.

Signed-off-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230819043947.4100985-2-reijiw@google.com