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@xxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
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 ?