From: Oliver Upton <oliver.upton@linux.dev>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Peter Maydell <peter.maydell@linaro.org>,
Richard Henderson <richard.henderson@linaro.org>,
Vincent Donnefort <vdonnefort@google.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev
Subject: Re: [PATCH v1 0/2] arm64/sme: Fix SMPRI_EL1 traps for KVM guests
Date: Fri, 28 Oct 2022 00:38:28 +0000 [thread overview]
Message-ID: <Y1skhMlaBoFfAZDH@google.com> (raw)
In-Reply-To: <20221027210441.814061-1-broonie@kernel.org>
On Thu, Oct 27, 2022 at 10:04:38PM +0100, Mark Brown wrote:
> When adding support for SME I missed management of traps for SMPRI_EL1
> in KVM guests. This series adds that management, and also updates the
> documentation to help avoid such issues in future.
>
> This was noticed due to Vincent Donnefort noticing that qemu has
> implemented support for SME virtualisation but not fine grained traps
> which was causing problems for qemu in nVHE mode since that already used
> fine grained traps with SME, the FGT registers are not implemented and
> UNDEF. As a result of this change VHE will also be affected so a
> separate series "KVM: arm: Refuse to enable KVM on systems with SME but
> not FGT" has been sent which will ensure we don't run on such systems.
>
> Mark Brown (2):
> arm64: booting: Document our requirements for fine grained traps with
> SME
> KVM: arm64: Trap access to SMPRI_EL1 in VHE mode
For the series:
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
--
Thanks,
Oliver
WARNING: multiple messages have this Message-ID (diff)
From: Oliver Upton <oliver.upton@linux.dev>
To: Mark Brown <broonie@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Marc Zyngier <maz@kernel.org>,
Peter Maydell <peter.maydell@linaro.org>,
Richard Henderson <richard.henderson@linaro.org>,
Vincent Donnefort <vdonnefort@google.com>,
James Morse <james.morse@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev
Subject: Re: [PATCH v1 0/2] arm64/sme: Fix SMPRI_EL1 traps for KVM guests
Date: Fri, 28 Oct 2022 00:38:28 +0000 [thread overview]
Message-ID: <Y1skhMlaBoFfAZDH@google.com> (raw)
In-Reply-To: <20221027210441.814061-1-broonie@kernel.org>
On Thu, Oct 27, 2022 at 10:04:38PM +0100, Mark Brown wrote:
> When adding support for SME I missed management of traps for SMPRI_EL1
> in KVM guests. This series adds that management, and also updates the
> documentation to help avoid such issues in future.
>
> This was noticed due to Vincent Donnefort noticing that qemu has
> implemented support for SME virtualisation but not fine grained traps
> which was causing problems for qemu in nVHE mode since that already used
> fine grained traps with SME, the FGT registers are not implemented and
> UNDEF. As a result of this change VHE will also be affected so a
> separate series "KVM: arm: Refuse to enable KVM on systems with SME but
> not FGT" has been sent which will ensure we don't run on such systems.
>
> Mark Brown (2):
> arm64: booting: Document our requirements for fine grained traps with
> SME
> KVM: arm64: Trap access to SMPRI_EL1 in VHE mode
For the series:
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
--
Thanks,
Oliver
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next prev parent reply other threads:[~2022-10-28 0:38 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-27 21:04 [PATCH v1 0/2] arm64/sme: Fix SMPRI_EL1 traps for KVM guests Mark Brown
2022-10-27 21:04 ` Mark Brown
2022-10-27 21:04 ` [PATCH v1 1/2] arm64: booting: Document our requirements for fine grained traps with SME Mark Brown
2022-10-27 21:04 ` Mark Brown
2022-10-30 17:40 ` Catalin Marinas
2022-10-30 17:40 ` Catalin Marinas
2022-10-27 21:04 ` [PATCH v1 2/2] KVM: arm64: Trap access to SMPRI_EL1 in VHE mode Mark Brown
2022-10-27 21:04 ` Mark Brown
2022-10-31 9:45 ` Marc Zyngier
2022-10-31 9:45 ` Marc Zyngier
2022-10-31 12:41 ` Mark Brown
2022-10-31 12:41 ` Mark Brown
2022-10-28 0:38 ` Oliver Upton [this message]
2022-10-28 0:38 ` [PATCH v1 0/2] arm64/sme: Fix SMPRI_EL1 traps for KVM guests Oliver Upton
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