Searched hist:a354a64d (Results 1 – 2 of 2) sorted by relevance
/openbmc/linux/arch/arm64/kvm/ |
H A D | debug.c | a354a64d Tue Mar 23 07:06:30 CDT 2021 Suzuki K Poulose <suzuki.poulose@arm.com> 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
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/openbmc/linux/arch/arm64/include/asm/ |
H A D | kvm_arm.h | a354a64d Tue Mar 23 07:06:30 CDT 2021 Suzuki K Poulose <suzuki.poulose@arm.com> 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
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