From: Marc Zyngier <maz@kernel.org>
To: neil.armstrong@linaro.org
Cc: Joey Gouly <joey.gouly@arm.com>,
linux-arm-kernel@lists.infradead.org,
Bjorn Andersson <andersson@kernel.org>,
nd@arm.com, broonie@kernel.org, catalin.marinas@arm.com,
james.morse@arm.com, mark.rutland@arm.com,
oliver.upton@linux.dev, shuah@kernel.org, suzuki.poulose@arm.com,
will@kernel.org, yuzenghui@huawei.com,
linux-arm-msm <linux-arm-msm@vger.kernel.org>
Subject: Re: [PATCH v4 16/20] arm64: enable Permission Indirection Extension (PIE)
Date: Tue, 20 Jun 2023 21:35:10 +0100 [thread overview]
Message-ID: <1c70fa1065b313d314707f22386972e3@kernel.org> (raw)
In-Reply-To: <c3598e8e-46a5-c8d6-bf9f-9fb8f6cd346e@linaro.org>
On 2023-06-20 20:16, Neil Armstrong wrote:
> Hi Joey,
>
> On 06/06/2023 16:58, Joey Gouly wrote:
>> Now that the necessary changes have been made, set the Permission
>> Indirection
>> registers and enable the Permission Indirection Extension.
>>
>> Signed-off-by: Joey Gouly <joey.gouly@arm.com>
>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>> Cc: Will Deacon <will@kernel.org>
>> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
>
> This patch on linux-next causes a great amount of:
>
> X xxx.xxxxxx Emulated RAZ for ID register: ISS 0x36002f
>
> messages printed by the system firmware on the Qualcomm SM8550 SoC,
> and the platform is barely usable.
As others have said on this thread, this is a firmware bug.
Not a lot we can do about that, unfortunately, apart from hiding
the new feature behind a config option that you'd disable on this
platform.
Alternatively, disabling idle management on this machine should
reduce the screaming greatly.
M.
--
Jazz is not dead. It just smells funny...
WARNING: multiple messages have this Message-ID (diff)
From: Marc Zyngier <maz@kernel.org>
To: neil.armstrong@linaro.org
Cc: Joey Gouly <joey.gouly@arm.com>,
linux-arm-kernel@lists.infradead.org,
Bjorn Andersson <andersson@kernel.org>,
nd@arm.com, broonie@kernel.org, catalin.marinas@arm.com,
james.morse@arm.com, mark.rutland@arm.com,
oliver.upton@linux.dev, shuah@kernel.org, suzuki.poulose@arm.com,
will@kernel.org, yuzenghui@huawei.com,
linux-arm-msm <linux-arm-msm@vger.kernel.org>
Subject: Re: [PATCH v4 16/20] arm64: enable Permission Indirection Extension (PIE)
Date: Tue, 20 Jun 2023 21:35:10 +0100 [thread overview]
Message-ID: <1c70fa1065b313d314707f22386972e3@kernel.org> (raw)
In-Reply-To: <c3598e8e-46a5-c8d6-bf9f-9fb8f6cd346e@linaro.org>
On 2023-06-20 20:16, Neil Armstrong wrote:
> Hi Joey,
>
> On 06/06/2023 16:58, Joey Gouly wrote:
>> Now that the necessary changes have been made, set the Permission
>> Indirection
>> registers and enable the Permission Indirection Extension.
>>
>> Signed-off-by: Joey Gouly <joey.gouly@arm.com>
>> Cc: Catalin Marinas <catalin.marinas@arm.com>
>> Cc: Will Deacon <will@kernel.org>
>> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
>
> This patch on linux-next causes a great amount of:
>
> X xxx.xxxxxx Emulated RAZ for ID register: ISS 0x36002f
>
> messages printed by the system firmware on the Qualcomm SM8550 SoC,
> and the platform is barely usable.
As others have said on this thread, this is a firmware bug.
Not a lot we can do about that, unfortunately, apart from hiding
the new feature behind a config option that you'd disable on this
platform.
Alternatively, disabling idle management on this machine should
reduce the screaming greatly.
M.
--
Jazz is not dead. It just smells funny...
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next prev parent reply other threads:[~2023-06-20 20:35 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 14:58 [PATCH v4 00/20] Permission Indirection Extension Joey Gouly
2023-06-06 14:58 ` [PATCH v4 01/20] arm64/sysreg: Add ID register ID_AA64MMFR3 Joey Gouly
2023-06-06 14:58 ` [PATCH v4 02/20] arm64/sysreg: add system registers TCR2_ELx Joey Gouly
2023-06-06 14:58 ` [PATCH v4 03/20] arm64/sysreg: update HCRX_EL2 register Joey Gouly
2023-06-06 14:58 ` [PATCH v4 04/20] arm64/sysreg: add PIR*_ELx registers Joey Gouly
2023-06-06 14:58 ` [PATCH v4 05/20] arm64: cpufeature: add system register ID_AA64MMFR3 Joey Gouly
2023-06-06 14:58 ` [PATCH v4 06/20] arm64: cpufeature: add TCR2 cpucap Joey Gouly
2023-06-06 14:58 ` [PATCH v4 07/20] arm64: cpufeature: add Permission Indirection Extension cpucap Joey Gouly
2023-06-06 14:58 ` [PATCH v4 08/20] KVM: arm64: Save/restore TCR2_EL1 Joey Gouly
2023-06-06 14:58 ` [PATCH v4 09/20] KVM: arm64: Save/restore PIE registers Joey Gouly
2023-06-06 14:58 ` [PATCH v4 10/20] KVM: arm64: expose ID_AA64MMFR3_EL1 to guests Joey Gouly
2023-06-06 14:58 ` [PATCH v4 11/20] arm64: add PTE_UXN/PTE_WRITE to SWAPPER_*_FLAGS Joey Gouly
2023-06-06 14:58 ` [PATCH v4 12/20] arm64: add PTE_WRITE to PROT_SECT_NORMAL Joey Gouly
2023-06-06 14:58 ` [PATCH v4 13/20] arm64: reorganise PAGE_/PROT_ macros Joey Gouly
2023-08-22 14:10 ` Ard Biesheuvel
2023-08-24 10:14 ` Joey Gouly
2023-08-24 10:18 ` Ard Biesheuvel
2023-08-24 13:09 ` Joey Gouly
2023-08-28 10:30 ` Ard Biesheuvel
2023-06-06 14:58 ` [PATCH v4 14/20] arm64: disable EL2 traps for PIE Joey Gouly
2023-06-06 14:58 ` [PATCH v4 15/20] arm64: add encodings of PIRx_ELx registers Joey Gouly
2023-06-06 14:58 ` [PATCH v4 16/20] arm64: enable Permission Indirection Extension (PIE) Joey Gouly
2023-06-20 19:16 ` Neil Armstrong
2023-06-20 19:16 ` Neil Armstrong
2023-06-20 19:47 ` Joey Gouly
2023-06-20 19:47 ` Joey Gouly
2023-06-20 20:27 ` Mark Brown
2023-06-20 20:27 ` Mark Brown
2023-06-20 20:41 ` Oliver Upton
2023-06-20 20:41 ` Oliver Upton
2023-06-20 20:35 ` Marc Zyngier [this message]
2023-06-20 20:35 ` Marc Zyngier
2023-06-20 21:17 ` Trilok Soni
2023-06-20 21:17 ` Trilok Soni
2023-06-06 14:58 ` [PATCH v4 17/20] arm64: transfer permission indirection settings to EL2 Joey Gouly
2023-06-06 14:58 ` [PATCH v4 18/20] arm64: Document boot requirements for PIE Joey Gouly
2023-06-06 14:58 ` [PATCH v4 19/20] KVM: selftests: get-reg-list: support ID register features Joey Gouly
2023-06-06 14:58 ` [PATCH v4 20/20] KVM: selftests: get-reg-list: add Permission Indirection registers Joey Gouly
2023-07-03 12:03 ` Andrew Jones
2023-07-12 14:59 ` Joey Gouly
2023-07-19 15:11 ` Andrew Jones
2023-06-06 17:29 ` [PATCH v4 00/20] Permission Indirection Extension Catalin Marinas
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