Messages in this thread | | | Subject | Re: [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls | From | Suzuki K Poulose <> | Date | Tue, 23 Mar 2021 09:44:41 +0000 |
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On 23/03/2021 09:16, Marc Zyngier wrote: > 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?
Yes please.
Thanks ! Suzuki
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