From: Marc Zyngier <maz@kernel.org>
To: Fuad Tabba <tabba@google.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>,
kvm@vger.kernel.org, kvmarm@lists.linux.dev, will@kernel.org,
catalin.marinas@arm.com, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org, steven.price@arm.com,
aneesh.kumar@kernel.org, oupton@kernel.org, gshan@redhat.com,
joey.gouly@arm.com, yuzenghui@huawei.com,
linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com,
sdonthineni@nvidia.com, alpergun@google.com,
fj0570is@fujitsu.com, WeiLin.Chang@arm.com,
lpieralisi@kernel.org, enju.kohei@fujitsu.com,
sudeep.holla@arm.com, jonathan.cameron@oss.qualcomm.com
Subject: Re: [PATCH v21 05/23] KVM: arm64: Track the type of VM in kvm_arch
Date: Fri, 02 Oct 2026 16:29:26 +0100 [thread overview]
Message-ID: <86o6dc2ka1.wl-maz@kernel.org> (raw)
In-Reply-To: <CA+EHjTy4rb+6z0bqh7sPqACES0EDpURdeoyiFGmdw3p0PENcOQ@mail.gmail.com>
On Fri, 02 Oct 2026 15:37:00 +0100,
Fuad Tabba <tabba@google.com> wrote:
>
> Hi Marc,
>
> On Fri, 02 Oct 2026 15:15:06 +0100, Marc Zyngier <maz@kernel.org> wrote:
> [...]
> > Honestly, we introduce the flavor stuff to make it easy to match
> > things on a particular VM type in a readable way. So why isn't this
> > reading:
> >
> > if (vcpu->kvm->arch.vm_flavor != VM_PROTECTED_PKVM)
> > return;
>
> I know this is a sketch, but just in case: that's inverted. The sync
> only applies to non-protected pKVM VMs (EL2 ignores it for protected
> ones), so it would be != VM_PKVM.
See what I meant about this stuff being completely intractable? I
still have no idea what it means! ;-)
M.
--
Without deviation from the norm, progress is not possible.
next prev parent reply other threads:[~2026-10-02 15:29 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-01 21:06 [PATCH v21 00/23] KVM: arm64: CCA: Add basic plumbing for Realms Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 01/23] KVM: arm64: protected VM: Handle user writes to CNTVCT_EL0/CNTPCT_EL0 Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 02/23] KVM: arm64: Disable Steal time accounting for protected guests Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 03/23] KVM: arm64: Include kvm_emulate.h in kvm/arm_psci.h Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 04/23] KVM: arm64: Avoid including linux/kvm_host.h in kvm_pgtable.h Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 05/23] KVM: arm64: Track the type of VM in kvm_arch Suzuki K Poulose
2026-10-02 10:06 ` Fuad Tabba
2026-10-02 12:57 ` Marc Zyngier
2026-10-02 13:05 ` Fuad Tabba
2026-10-02 13:10 ` Suzuki K Poulose
2026-10-02 13:34 ` Marc Zyngier
2026-10-02 14:15 ` Marc Zyngier
2026-10-02 14:37 ` Fuad Tabba
2026-10-02 15:29 ` Marc Zyngier [this message]
2026-10-02 15:30 ` Fuad Tabba
2026-10-02 15:15 ` Suzuki K Poulose
2026-10-02 15:40 ` Marc Zyngier
2026-10-02 15:42 ` Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 06/23] KVM: arm64: Don't call vcpu_set_pauth_traps for pKVM host Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 07/23] KVM: arm64: Refactor the vcpu_load to allow for VM specific callbacks Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 08/23] KVM: arm64: Add vcpu load/put call backs for flavors Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 09/23] KVM: arm64: Reuse kvm_stage2_unmap_range in kvm_unmap_gfn_range Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 10/23] KVM: arm64: Add VM specific callback for S2 MMU operations Suzuki K Poulose
2026-10-02 10:19 ` Fuad Tabba
2026-10-02 10:29 ` Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 11/23] KVM: arm64: Use a local kvm pointer in kvm_handle_guest_abort() Suzuki K Poulose
2026-10-02 9:14 ` Fuad Tabba
2026-10-01 21:06 ` [PATCH v21 12/23] KVM: arm64: Abstract out memory abort handling Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 13/23] KVM: arm64: Mandate VGIC v3 for pKVM VMs and Realms Suzuki K Poulose
2026-10-02 9:23 ` Fuad Tabba
2026-10-01 21:06 ` [PATCH v21 14/23] KVM: arm64: CCA: Add a new mode for supporting Realm guests Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 15/23] KVM: arm64: CCA: Add VCPU load/put for Realms Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 16/23] KVM: arm64: CCA: Add bare minimal S2 operations for Realm Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 17/23] KVM: arm64: CCA: Introduce Realms Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 18/23] KVM: arm64: CCA: Don't expose unsupported capabilities for realm guests Suzuki K Poulose
2026-10-02 9:34 ` Fuad Tabba
2026-10-02 9:36 ` Suzuki K Poulose
2026-10-01 21:06 ` [PATCH v21 19/23] KVM: arm64: Prevent unsupported vcpu features for VM types Suzuki K Poulose
2026-10-01 21:07 ` [PATCH v21 20/23] KVM: arm64: CCA: WARN on injected undef exceptions Suzuki K Poulose
2026-10-01 21:07 ` [PATCH v21 21/23] KVM: arm64: CCA: Support timers in realm RECs Suzuki K Poulose
2026-10-01 21:07 ` [PATCH v21 22/23] KVM: arm64: CCA: Expose SVE VL register before VCPU finalization Suzuki K Poulose
2026-10-01 21:07 ` [PATCH v21 23/23] KVM: arm64: CCA: Control user register access for Realms Suzuki K Poulose
2026-10-01 21:41 ` [PATCH v21 00/23] KVM: arm64: CCA: Add basic plumbing " Gavin Shan
2026-10-02 6:13 ` Suzuki K Poulose
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