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From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org,
	mike.leach@linaro.org, anshuman.khandual@arm.com,
	leo.yan@linaro.org, Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls
Date: Tue, 23 Mar 2021 09:44:41 +0000	[thread overview]
Message-ID: <59682421-a985-ec71-3ade-09c17aa58b5a@arm.com> (raw)
In-Reply-To: <8cb6eced29d9749d88af6f6d2f649019@kernel.org>

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

  reply	other threads:[~2021-03-23  9:45 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-25 19:35 [PATCH v4 00/19] arm64: coresight: Add support for ETE and TRBE Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 01/19] perf: aux: Add flags for the buffer format Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 02/19] perf: aux: Add CoreSight PMU buffer formats Suzuki K Poulose
2021-03-16 17:04   ` Mathieu Poirier
2021-03-22 12:29     ` Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 03/19] kvm: arm64: Hide system instruction access to Trace registers Suzuki K Poulose
2021-03-22 22:21   ` Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 04/19] kvm: arm64: nvhe: Save the SPE context early Suzuki K Poulose
2021-03-01 16:32   ` Alexandru Elisei
2021-03-02 10:01     ` Suzuki K Poulose
2021-03-02 10:13       ` Marc Zyngier
2021-03-02 11:00       ` Alexandru Elisei
2021-02-25 19:35 ` [PATCH v4 05/19] kvm: arm64: Disable guest access to trace filter controls Suzuki K Poulose
2021-03-22 22:24   ` Suzuki K Poulose
2021-03-23  9:16     ` Marc Zyngier
2021-03-23  9:44       ` Suzuki K Poulose [this message]
2021-02-25 19:35 ` [PATCH v4 06/19] arm64: Add support for trace synchronization barrier Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 07/19] arm64: Add TRBE definitions Suzuki K Poulose
2021-03-16 17:46   ` Mathieu Poirier
2021-02-25 19:35 ` [PATCH v4 08/19] arm64: kvm: Enable access to TRBE support for host Suzuki K Poulose
2021-03-16 17:49   ` Mathieu Poirier
2021-02-25 19:35 ` [PATCH v4 09/19] coresight: etm4x: Move ETM to prohibited region for disable Suzuki K Poulose
2021-03-08 17:25   ` Mike Leach
2021-03-16 19:30   ` Mathieu Poirier
2021-03-17 10:44     ` Suzuki K Poulose
2021-03-17 17:09       ` Mathieu Poirier
2021-03-22 21:28   ` Mathieu Poirier
2021-02-25 19:35 ` [PATCH v4 10/19] coresight: etm-perf: Allow an event to use different sinks Suzuki K Poulose
2021-03-08 17:25   ` Mike Leach
2021-03-16 20:23   ` Mathieu Poirier
2021-03-17 10:47     ` Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 11/19] coresight: Do not scan for graph if none is present Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 12/19] coresight: etm4x: Add support for PE OS lock Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 13/19] coresight: ete: Add support for ETE sysreg access Suzuki K Poulose
2021-02-25 22:33   ` kernel test robot
2021-02-26  6:25   ` kernel test robot
2021-02-25 19:35 ` [PATCH v4 14/19] coresight: ete: Add support for ETE tracing Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 15/19] dts: bindings: Document device tree bindings for ETE Suzuki K Poulose
2021-03-06 21:06   ` Rob Herring
2021-03-08 17:25     ` Mike Leach
2021-03-22 16:53     ` Suzuki K Poulose
2021-03-22 17:28       ` Rob Herring
2021-03-22 22:49         ` Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 16/19] coresight: etm-perf: Handle stale output handles Suzuki K Poulose
2021-02-25 19:35 ` [PATCH v4 17/19] coresight: core: Add support for dedicated percpu sinks Suzuki K Poulose
2021-02-26  6:34   ` kernel test robot
2021-03-01 13:54     ` Suzuki K Poulose
2021-03-02 10:21       ` Anshuman Khandual
2021-03-01 14:08   ` [PATCH v4.1 " Suzuki K Poulose
2021-03-08 17:26   ` [PATCH v4 " Mike Leach
2021-03-22 16:57     ` Suzuki K Poulose
2021-03-17 19:31   ` Mathieu Poirier
2021-02-25 19:35 ` [PATCH v4 18/19] coresight: sink: Add TRBE driver Suzuki K Poulose
2021-03-08 17:26   ` Mike Leach
2021-03-19 10:30     ` Suzuki K Poulose
2021-03-19 11:55       ` Mike Leach
2021-03-22 21:24         ` Mathieu Poirier
2021-03-22 23:00           ` Suzuki K Poulose
2021-03-18 18:08   ` Mathieu Poirier
2021-03-19 10:34     ` Suzuki K Poulose
2021-03-19 14:47       ` Mathieu Poirier
2021-03-19 17:58   ` Mathieu Poirier
2021-03-22 21:20   ` Mathieu Poirier
2021-02-25 19:35 ` [PATCH v4 19/19] dts: bindings: Document device tree bindings for Arm TRBE Suzuki K Poulose

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