From: Marc Zyngier <maz@kernel.org>
To: Alexandru Elisei <alexandru.elisei@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
James Morse <james.morse@arm.com>
Cc: Reiji Watanabe <reijiw@google.com>,
kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org,
Andrew Jones <andrew.jones@linux.dev>
Subject: Re: [PATCH v3 0/7] KVM: arm64: Use visibility hook to treat ID regs as RAZ
Date: Wed, 14 Sep 2022 11:41:50 +0100 [thread overview]
Message-ID: <166315210221.2105633.12201786772874832958.b4-ty@kernel.org> (raw)
In-Reply-To: <20220913094441.3957645-1-oliver.upton@linux.dev>
On Tue, 13 Sep 2022 09:44:33 +0000, Oliver Upton wrote:
> For reasons unknown, the Arm architecture defines the 64-bit views of
> the 32-bit ID registers as UNKNOWN [1]. This combines poorly with the
> fact that KVM unconditionally exposes these registers to userspace,
> which could throw a wrench in migration between 64-bit only systems.
>
> This series reworks KVM's definition of these registers to RAZ/WI with
> the goal of providing consistent register values across 64-bit machines.
>
> [...]
Applied to kvm-arm64/next, thanks!
[1/7] KVM: arm64: Use visibility hook to treat ID regs as RAZ
commit: 34b4d20399e6fad2e3379b11e68dff1d1549274e
[2/7] KVM: arm64: Remove internal accessor helpers for id regs
commit: 4782ccc8ef50fabb70bab9fa73186285dba6d91d
[3/7] KVM: arm64: Drop raz parameter from read_id_reg()
commit: cdd5036d048ca96ef5212fb37f4f56db40cb1bc2
[4/7] KVM: arm64: Spin off helper for calling visibility hook
commit: 5d9a718b64e428a40939806873ecf16f072008b3
[5/7] KVM: arm64: Add a visibility bit to ignore user writes
commit: 4de06e4c1dc949c35c16e4423b4ccd735264b0a9
[6/7] KVM: arm64: Treat 32bit ID registers as RAZ/WI on 64bit-only system
commit: d5efec7ed826b3b29c6847bf59383d8d07347a4e
[7/7] KVM: selftests: Add test for AArch32 ID registers
commit: 797b84517c190053597e3f7e03ead15da872e04d
Cheers,
M.
--
Marc Zyngier <maz@kernel.org>
prev parent reply other threads:[~2022-09-14 10:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-13 9:44 [PATCH v3 0/7] KVM: arm64: Use visibility hook to treat ID regs as RAZ Oliver Upton
2022-09-13 9:44 ` [PATCH v3 1/7] " Oliver Upton
2022-09-13 9:44 ` [PATCH v3 2/7] KVM: arm64: Remove internal accessor helpers for id regs Oliver Upton
2022-09-13 9:44 ` [PATCH v3 3/7] KVM: arm64: Drop raz parameter from read_id_reg() Oliver Upton
2022-09-13 9:44 ` [PATCH v3 4/7] KVM: arm64: Spin off helper for calling visibility hook Oliver Upton
2022-09-13 9:44 ` [PATCH v3 5/7] KVM: arm64: Add a visibility bit to ignore user writes Oliver Upton
2022-09-13 9:44 ` [PATCH v3 6/7] KVM: arm64: Treat 32bit ID registers as RAZ/WI on 64bit-only system Oliver Upton
2022-09-13 9:44 ` [PATCH v3 7/7] KVM: selftests: Add test for AArch32 ID registers Oliver Upton
2022-09-14 10:41 ` Marc Zyngier [this message]
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