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Even though KVM sets up MDCR_EL2 to trap accesses to the SPE buffer and sampling control registers and to inject an undefined exception, the presence of FEAT_SPE is still advertised in the ID_AA64DFR0_EL1 register, if the hardware supports it. Getting an undefined exception when accessing a register usually happens for a hardware feature which is not implemented, and indeed this is how PMU emulation is handled when the virtual machine has been created without the KVM_ARM_VCPU_PMU_V3 feature. Let's be consistent and never advertise FEAT_SPE, because KVM doesn't have support for emulating it yet. Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20210409152154.198566-3-alexandru.elisei@arm.com |
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boot | ||
configs | ||
crypto | ||
include | ||
kernel | ||
kvm | ||
lib | ||
mm | ||
net | ||
xen | ||
Kbuild | ||
Kconfig | ||
Kconfig.debug | ||
Kconfig.platforms | ||
Makefile |