From: Srinivas Ramana <sramana@codeaurora.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
Will Deacon <will@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
David Brazdil <dbrazdil@google.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Ard Biesheuvel <ardb@kernel.org>,
Jing Zhang <jingzhangos@google.com>,
Ajay Patil <pajay@qti.qualcomm.com>,
Prasad Sodagudi <psodagud@codeaurora.org>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry.kdev@gmail.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
kernel-team@android.com
Subject: Re: [PATCH v4 19/21] arm64: cpufeatures: Allow disabling of BTI from the command-line
Date: Tue, 26 Jan 2021 12:35:05 -0800 [thread overview]
Message-ID: <f78c9df6-1dc1-a2fa-08c9-5b9e890c320e@codeaurora.org> (raw)
In-Reply-To: <YAwxhuw8L0Fp3cUf@Catalins-MacBook-Air.local>
Hi Marc,
On 1/23/2021 6:24 AM, Catalin Marinas wrote:
> On Mon, Jan 18, 2021 at 09:45:31AM +0000, Marc Zyngier wrote:
>> In order to be able to disable BTI at runtime, whether it is
>> for testing purposes, or to work around HW issues, let's add
>> support for overriding the ID_AA64PFR1_EL1.BTI field.
>>
>> This is further mapped on the arm64.nobti command-line alias.
>>
>> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Verified this Series for BTI as well for command line control.
With arm64.nobti:
BTI is disabled on both primary and secondary cores as expected(verified
page table entries).
HWCAPs show no BTI support and kernel instructions are being treated as
NOPs.
We don't have plan to repeat the test on v5 as there are not major
changes here.
Tested-by: Srinivas Ramana <sramana@codeaurora.org>
WARNING: multiple messages have this Message-ID (diff)
From: Srinivas Ramana <sramana@codeaurora.org>
To: Catalin Marinas <catalin.marinas@arm.com>, Marc Zyngier <maz@kernel.org>
Cc: Prasad Sodagudi <psodagud@codeaurora.org>,
linux-kernel@vger.kernel.org, Ard Biesheuvel <ardb@kernel.org>,
Ajay Patil <pajay@qti.qualcomm.com>,
kernel-team@android.com, Will Deacon <will@kernel.org>,
kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v4 19/21] arm64: cpufeatures: Allow disabling of BTI from the command-line
Date: Tue, 26 Jan 2021 12:35:05 -0800 [thread overview]
Message-ID: <f78c9df6-1dc1-a2fa-08c9-5b9e890c320e@codeaurora.org> (raw)
In-Reply-To: <YAwxhuw8L0Fp3cUf@Catalins-MacBook-Air.local>
Hi Marc,
On 1/23/2021 6:24 AM, Catalin Marinas wrote:
> On Mon, Jan 18, 2021 at 09:45:31AM +0000, Marc Zyngier wrote:
>> In order to be able to disable BTI at runtime, whether it is
>> for testing purposes, or to work around HW issues, let's add
>> support for overriding the ID_AA64PFR1_EL1.BTI field.
>>
>> This is further mapped on the arm64.nobti command-line alias.
>>
>> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Verified this Series for BTI as well for command line control.
With arm64.nobti:
BTI is disabled on both primary and secondary cores as expected(verified
page table entries).
HWCAPs show no BTI support and kernel instructions are being treated as
NOPs.
We don't have plan to repeat the test on v5 as there are not major
changes here.
Tested-by: Srinivas Ramana <sramana@codeaurora.org>
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next prev parent reply other threads:[~2021-01-27 3:18 UTC|newest]
Thread overview: 166+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-18 9:45 [PATCH v4 00/21] arm64: Early CPU feature override, and applications to VHE, BTI and PAuth Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 01/21] arm64: Fix labels in el2_setup macros Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 11:13 ` David Brazdil
2021-01-18 11:13 ` David Brazdil
2021-01-18 11:13 ` David Brazdil
2021-01-18 9:45 ` [PATCH v4 02/21] arm64: Fix outdated TCR setup comment Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-20 18:18 ` Catalin Marinas
2021-01-20 18:18 ` Catalin Marinas
2021-01-20 18:18 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 03/21] arm64: Turn the MMU-on sequence into a macro Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-20 18:18 ` Catalin Marinas
2021-01-20 18:18 ` Catalin Marinas
2021-01-20 18:18 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 04/21] arm64: Provide an 'upgrade to VHE' stub hypercall Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 11:25 ` David Brazdil
2021-01-18 11:25 ` David Brazdil
2021-01-18 11:25 ` David Brazdil
2021-01-24 18:44 ` Marc Zyngier
2021-01-24 18:44 ` Marc Zyngier
2021-01-24 18:44 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 05/21] arm64: Initialise as nVHE before switching to VHE Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 06/21] arm64: Move VHE-specific SPE setup to mutate_to_vhe() Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 07/21] arm64: Simplify init_el2_state to be non-VHE only Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 08/21] arm64: Move SCTLR_EL1 initialisation to EL-agnostic code Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-20 18:35 ` Catalin Marinas
2021-01-20 18:35 ` Catalin Marinas
2021-01-20 18:35 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 09/21] arm64: cpufeature: Add global feature override facility Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-22 18:41 ` Catalin Marinas
2021-01-22 18:41 ` Catalin Marinas
2021-01-22 18:41 ` Catalin Marinas
2021-01-23 15:59 ` Suzuki K Poulose
2021-01-23 15:59 ` Suzuki K Poulose
2021-01-23 15:59 ` Suzuki K Poulose
2021-01-18 9:45 ` [PATCH v4 10/21] arm64: cpufeature: Use IDreg override in __read_sysreg_by_encoding() Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-22 18:53 ` Catalin Marinas
2021-01-22 18:53 ` Catalin Marinas
2021-01-22 18:53 ` Catalin Marinas
2021-01-23 16:04 ` Suzuki K Poulose
2021-01-23 16:04 ` Suzuki K Poulose
2021-01-23 16:04 ` Suzuki K Poulose
2021-01-18 9:45 ` [PATCH v4 11/21] arm64: Extract early FDT mapping from kaslr_early_init() Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-22 18:55 ` Catalin Marinas
2021-01-22 18:55 ` Catalin Marinas
2021-01-22 18:55 ` Catalin Marinas
2021-01-23 13:25 ` Catalin Marinas
2021-01-23 13:25 ` Catalin Marinas
2021-01-23 13:25 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 12/21] arm64: cpufeature: Add an early command-line cpufeature override facility Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 13:07 ` David Brazdil
2021-01-18 13:07 ` David Brazdil
2021-01-18 13:07 ` David Brazdil
2021-01-23 13:23 ` Catalin Marinas
2021-01-23 13:23 ` Catalin Marinas
2021-01-23 13:23 ` Catalin Marinas
2021-01-23 13:43 ` Catalin Marinas
2021-01-23 13:43 ` Catalin Marinas
2021-01-23 13:43 ` Catalin Marinas
2021-01-24 16:21 ` Marc Zyngier
2021-01-24 16:21 ` Marc Zyngier
2021-01-24 16:21 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 13/21] arm64: Allow ID_AA64MMFR1_EL1.VH to be overridden from the command line Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-23 14:04 ` Catalin Marinas
2021-01-23 14:04 ` Catalin Marinas
2021-01-23 14:04 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 14/21] arm64: Honor VHE being disabled from the command-line Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 13:14 ` David Brazdil
2021-01-18 13:14 ` David Brazdil
2021-01-18 13:14 ` David Brazdil
2021-01-23 14:07 ` Catalin Marinas
2021-01-23 14:07 ` Catalin Marinas
2021-01-23 14:07 ` Catalin Marinas
2021-01-24 15:59 ` Marc Zyngier
2021-01-24 15:59 ` Marc Zyngier
2021-01-24 15:59 ` Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 15/21] arm64: Add an aliasing facility for the idreg override Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 13:18 ` David Brazdil
2021-01-18 13:18 ` David Brazdil
2021-01-18 13:18 ` David Brazdil
2021-01-24 19:01 ` Marc Zyngier
2021-01-24 19:01 ` Marc Zyngier
2021-01-24 19:01 ` Marc Zyngier
2021-01-23 14:12 ` Catalin Marinas
2021-01-23 14:12 ` Catalin Marinas
2021-01-23 14:12 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 16/21] arm64: Make kvm-arm.mode={nvhe,protected} an alias of id_aa64mmfr1.vh=0 Marc Zyngier
2021-01-18 9:45 ` [PATCH v4 16/21] arm64: Make kvm-arm.mode={nvhe, protected} " Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-23 14:15 ` [PATCH v4 16/21] arm64: Make kvm-arm.mode={nvhe,protected} " Catalin Marinas
2021-01-23 14:15 ` Catalin Marinas
2021-01-23 14:15 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 17/21] KVM: arm64: Document HVC_VHE_RESTART stub hypercall Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 13:29 ` David Brazdil
2021-01-18 13:29 ` David Brazdil
2021-01-18 13:29 ` David Brazdil
2021-01-18 9:45 ` [PATCH v4 18/21] arm64: Move "nokaslr" over to the early cpufeature infrastructure Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 14:46 ` David Brazdil
2021-01-18 14:46 ` David Brazdil
2021-01-18 14:46 ` David Brazdil
2021-01-24 18:41 ` Marc Zyngier
2021-01-24 18:41 ` Marc Zyngier
2021-01-24 18:41 ` Marc Zyngier
2021-01-23 14:19 ` Catalin Marinas
2021-01-23 14:19 ` Catalin Marinas
2021-01-23 14:19 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 19/21] arm64: cpufeatures: Allow disabling of BTI from the command-line Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-23 14:24 ` Catalin Marinas
2021-01-23 14:24 ` Catalin Marinas
2021-01-23 14:24 ` Catalin Marinas
2021-01-26 20:35 ` Srinivas Ramana [this message]
2021-01-26 20:35 ` Srinivas Ramana
2021-01-18 9:45 ` [PATCH v4 20/21] arm64: Defer enabling pointer authentication on boot core Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-23 14:26 ` Catalin Marinas
2021-01-23 14:26 ` Catalin Marinas
2021-01-23 14:26 ` Catalin Marinas
2021-01-18 9:45 ` [PATCH v4 21/21] arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-18 9:45 ` Marc Zyngier
2021-01-23 14:28 ` Catalin Marinas
2021-01-23 14:28 ` Catalin Marinas
2021-01-23 14:28 ` Catalin Marinas
2021-01-26 20:30 ` Srinivas Ramana
2021-01-26 20:30 ` Srinivas Ramana
2021-01-18 14:54 ` [PATCH v4 00/21] arm64: Early CPU feature override, and applications to VHE, BTI and PAuth David Brazdil
2021-01-18 14:54 ` David Brazdil
2021-01-18 14:54 ` David Brazdil
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