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| author | Suzuki K Poulose <suzuki.poulose@arm.com> | 2021-03-23 13:06:30 +0100 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-03-24 18:26:38 +0100 |
| commit | a354a64d91eec3e0f8ef0eed575b480fd75b999c (patch) | |
| tree | 116271c774f2d120987c46acfe10b64c5a985bcb /Documentation/virt | |
| parent | KVM: arm64: Hide system instruction access to Trace registers (diff) | |
| download | linux-a354a64d91eec3e0f8ef0eed575b480fd75b999c.tar.xz linux-a354a64d91eec3e0f8ef0eed575b480fd75b999c.zip | |
KVM: arm64: Disable guest access to trace filter controls
Disable guest access to the Trace Filter control registers.
We do not advertise the Trace filter feature to the guest
(ID_AA64DFR0_EL1: TRACE_FILT is cleared) already, but the guest
can still access the TRFCR_EL1 unless we trap it.
This will also make sure that the guest cannot fiddle with
the filtering controls set by a nvhe host.
Cc: Marc Zyngier <maz@kernel.org>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210323120647.454211-3-suzuki.poulose@arm.com
Diffstat (limited to 'Documentation/virt')
0 files changed, 0 insertions, 0 deletions