Marc Zyngier 29ca4fac7d KVM: arm64: Do not change the PMU event filter after a VCPU has run ... [ Upstream commit 5177fe91e4 ] Userspace can specify which events a guest is allowed to use with the KVM_ARM_VCPU_PMU_V3_FILTER attribute. The list of allowed events can be identified by a guest from reading the PMCEID{0,1}_EL0 registers. Changing the PMU event filter after a VCPU has run can cause reads of the registers performed before the filter is changed to return different values than reads performed with the new event filter in place. The architecture defines the two registers as read-only, and this behaviour contradicts that. Keep track when the first VCPU has run and deny changes to the PMU event filter to prevent this from happening. Signed-off-by: Marc Zyngier <maz@kernel.org> [ Alexandru E: Added commit message, updated ioctl documentation ] Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20220127161759.53553-2-alexandru.elisei@arm.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-04-13 19:27:13 +02:00
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ABI	f2fs: don't get FREEZE lock in f2fs_evict_inode in frozen fs	2022-04-08 13:58:40 +02:00
accounting
admin-guide	docs: sysctl/kernel: add missing bit to panic_print	2022-04-08 13:59:03 +02:00
arc
arm
arm64
block
bpf
cdrom
core-api	Reinstate some of "swiotlb: rework "fix info leak with DMA_FROM_DEVICE""	2022-04-08 13:58:59 +02:00
cpu-freq
crypto
dev-tools
devicetree	dt-bindings: pinctrl: pinctrl-microchip-sgpio: Fix example	2022-04-08 13:59:02 +02:00
doc-guide
driver-api	cxl/core/port: Rename bus.c to port.c	2022-04-08 13:58:07 +02:00
fault-injection
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process	Documentation: update stable tree link	2022-04-08 13:57:17 +02:00
RCU
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security	docs: fix 'make htmldocs' warning in SCTP.rst	2022-04-08 13:58:59 +02:00
sh
sound	ALSA: hda/realtek: Add alc256-samsung-headphone fixup	2022-04-08 13:58:46 +02:00
sparc
sphinx	docs: sphinx/requirements: Limit jinja2<3.1	2022-04-08 13:57:14 +02:00
sphinx-static
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virt	KVM: arm64: Do not change the PMU event filter after a VCPU has run	2022-04-13 19:27:13 +02:00
vm
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x86
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arch.rst
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
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