Messages in this thread | | | Date | Tue, 23 Mar 2021 09:16:59 +0000 | From | Marc Zyngier <> | Subject | Re: [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls |
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Hi Suzuki,
On 2021-03-22 22:24, Suzuki K Poulose wrote: > Hi Marc, > > On 25/02/2021 19:35, Suzuki K Poulose wrote: >> 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> > > We have already have the v8.4 self hosted tracing support in 5.12-rcX. > Do you think you can pick this up for this 5.12 ?
Sure, no problem. Shall I pick patch #3 at the same time?
Thanks,
M. -- Jazz is not dead. It just smells funny...
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