[PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls

[Marc Zyngier]

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 at kernel.org>
>> Cc: Will Deacon <will at kernel.org>
>> Cc: Mark Rutland <mark.rutland at arm.com>
>> Cc: Catalin Marinas <catalin.marinas at arm.com>
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose at 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...