From: Oliver Upton <oliver.upton@linux.dev>
To: Marc Zyngier <maz@kernel.org>
Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>, Joey Gouly <joey.gouly@arm.com>,
Mark Brown <broonie@kernel.org>
Subject: Re: [PATCH v2 06/25] KVM: arm64: nv: Add sanitising to VNCR-backed HCRX_EL2
Date: Fri, 2 Feb 2024 19:17:37 +0000 [thread overview]
Message-ID: <Zb0_0fq4E1_L7lC6@linux.dev> (raw)
In-Reply-To: <Zb0jRzTYyc0IxR00@linux.dev>
On Fri, Feb 02, 2024 at 05:15:51PM +0000, Oliver Upton wrote:
> On Fri, Feb 02, 2024 at 02:56:50PM +0000, Marc Zyngier wrote:
> > No amount of warnings will do, because people don't give a damn.
> >
> > I'm actually in favour of something far more radical: we snapshot the
> > raw value of all the used RES0/1, and put BUILD_BUG_ON()s that fire if
> > any value has changed. They will have to touch the KVM code to fix
> > that, and we catch them red-handed.
>
> Oh I like that a lot more.
Unsure which registers you planned to give this treatment, but all of
the ID registers we know about should probably go in this bucket too.
--
Thanks,
Oliver
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next prev parent reply other threads:[~2024-02-02 20:33 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-30 20:45 [PATCH v2 00/25] KVM/arm64: VM configuration enforcement Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 01/25] arm64: sysreg: Add missing ID_AA64ISAR[13]_EL1 fields and variants Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 02/25] KVM: arm64: Add feature checking helpers Marc Zyngier
2024-02-02 17:13 ` Suzuki K Poulose
2024-02-04 11:08 ` Marc Zyngier
2024-02-04 11:44 ` Marc Zyngier
2024-02-05 10:10 ` Suzuki K Poulose
2024-01-30 20:45 ` [PATCH v2 03/25] KVM: arm64: nv: Add sanitising to VNCR-backed sysregs Marc Zyngier
2024-01-31 14:52 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 04/25] KVM: arm64: nv: Add sanitising to EL2 configuration registers Marc Zyngier
2024-01-31 17:16 ` Joey Gouly
2024-02-02 15:05 ` Marc Zyngier
2024-02-01 14:56 ` Joey Gouly
2024-02-02 15:10 ` Marc Zyngier
2024-02-02 16:26 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 05/25] KVM: arm64: nv: Add sanitising to VNCR-backed FGT sysregs Marc Zyngier
2024-02-01 14:38 ` Joey Gouly
2024-02-02 14:58 ` Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 06/25] KVM: arm64: nv: Add sanitising to VNCR-backed HCRX_EL2 Marc Zyngier
2024-02-02 8:52 ` Oliver Upton
2024-02-02 13:30 ` Mark Brown
2024-02-02 14:56 ` Marc Zyngier
2024-02-02 17:15 ` Oliver Upton
2024-02-02 19:17 ` Oliver Upton [this message]
2024-02-02 20:14 ` Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 07/25] KVM: arm64: nv: Drop sanitised_sys_reg() helper Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 08/25] KVM: arm64: Unify HDFG[WR]TR_GROUP FGT identifiers Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 09/25] KVM: arm64: nv: Correctly handle negative polarity FGTs Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 10/25] KVM: arm64: nv: Turn encoding ranges into discrete XArray stores Marc Zyngier
2024-01-31 14:57 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 11/25] KVM: arm64: Drop the requirement for XARRAY_MULTI Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 12/25] KVM: arm64: nv: Move system instructions to their own sys_reg_desc array Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 13/25] KVM: arm64: Always populate the trap configuration xarray Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 14/25] KVM: arm64: Register AArch64 system register entries with the sysreg xarray Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 15/25] KVM: arm64: Use the xarray as the primary sysreg/sysinsn walker Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 16/25] KVM: arm64: Rename __check_nv_sr_forward() to triage_sysreg_trap() Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 17/25] KVM: arm64: Add Fine-Grained UNDEF tracking information Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 18/25] KVM: arm64: Propagate and handle Fine-Grained UNDEF bits Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 19/25] KVM: arm64: Move existing feature disabling over to FGU infrastructure Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 20/25] KVM: arm64: Streamline save/restore of HFG[RW]TR_EL2 Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 21/25] KVM: arm64: Make TLBI OS/Range UNDEF if not advertised to the guest Marc Zyngier
2024-01-31 15:05 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 22/25] KVM: arm64: Make PIR{,E0}_EL1 UNDEF if S1PIE is " Marc Zyngier
2024-01-31 14:46 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 23/25] KVM: arm64: Make AMU sysreg UNDEF if FEAT_AMU " Marc Zyngier
2024-01-30 20:45 ` [PATCH v2 24/25] KVM: arm64: Make FEAT_MOPS UNDEF if " Marc Zyngier
2024-01-31 15:02 ` Joey Gouly
2024-01-30 20:45 ` [PATCH v2 25/25] KVM: arm64: Add debugfs file for guest's ID registers Marc Zyngier
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