From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: Fuad Tabba <tabba@google.com>
Cc: kvm@vger.kernel.org, kvmarm@lists.linux.dev, maz@kernel.org,
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
Subject: Re: [PATCH v18 12/23] KVM: arm64: Widen the scope of "protected" VMs
Date: Thu, 17 Sep 2026 17:48:46 +0100 [thread overview]
Message-ID: <888527d9-6355-45fc-b4a1-e485ae32d377@arm.com> (raw)
In-Reply-To: <CA+EHjTxfbG6-LPjJVoErQ3iJk4vAvhVO=Qv6hjcxDXL0yByiQA@mail.gmail.com>
On 17/09/2026 12:51, Fuad Tabba wrote:
> Hi Suzuki,
>
> On Tue, 15 Sep 2026 17:01:30 +0100, Suzuki K Poulose
> <suzuki.poulose@arm.com> wrote:
> [...]
>> diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
> [...]
>> -#define kvm_vm_is_protected(kvm) ((kvm)->arch.vm_flavor == VM_PROTECTED_PKVM)
>> +#define kvm_vm_is_protected(kvm) ((kvm)->arch.vm_flavor >= __VM_PROTECTED)
>> +#define kvm_vm_is_protected_pkvm(kvm) ((kvm)->arch.vm_flavor == VM_PROTECTED_PKVM)
>> #define kvm_vm_is_unprotected_pkvm(kvm) ((kvm)->arch.vm_flavor == VM_PKVM)
>
> Agree with Marc that this belongs in patch 5. When it moves, could you
> add vcpu_is_protected_pkvm() next to vcpu_is_protected()? The pKVM
> host-side series [1] has vcpu_is_protected() checks that are pKVM
> mechanism (the vCPU feature allowlist, CPU_ON against the pKVM
> power-off state, the ONE_REG rejection after the first run), and with
> the wider predicate those have to carry a pKVM-specific name.
Ack.
Suzuki
>
> Cheers,
> /fuad
>
> [1] https://lore.kernel.org/all/20260914113338.159227-1-fuad.tabba@linux.dev/
next prev parent reply other threads:[~2026-09-17 16:48 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-15 16:01 [PATCH v18 00/23] KVM: arm64: CCA: Add basic plumbing for Realms Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 01/23] KVM: arm64: protected VM: Handle set_one_reg CNTVCT_EL0/CNTPCT_EL0 Suzuki K Poulose
2026-09-15 16:46 ` Marc Zyngier
2026-09-15 17:48 ` Suzuki K Poulose
2026-09-15 21:20 ` Suzuki K Poulose
2026-09-16 8:16 ` Marc Zyngier
2026-09-16 8:27 ` Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 02/23] KVM: arm64: Disable Steal time accounting for protected guests Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 03/23] KVM: arm64: Include kvm_emulate.h in kvm/arm_psci.h Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 04/23] KVM: arm64: Avoid including linux/kvm_host.h in kvm_pgtable.h Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 05/23] KVM: arm64: Track the type of VM in kvm_arch Suzuki K Poulose
2026-09-17 11:24 ` Fuad Tabba
2026-09-15 16:01 ` [PATCH v18 06/23] KVM: arm64: Refactor the vcpu_load to allow for VM specific callbacks Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 07/23] KVM: arm64: Add vcpu load/put call backs for flavors Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 08/23] KVM: arm64: Reuse kvm_stage2_unmap_range in kvm_unmap_gfn_range Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 09/23] KVM: arm64: Add VM specific callback for S2 MMU operations Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 10/23] KVM: arm64: Abstract out memory abort handling Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 11/23] KVM: arm64: Use kvm_vm_is_unprotected() for !kvm_vm_is_protected() Suzuki K Poulose
2026-09-17 11:47 ` Fuad Tabba
2026-09-17 16:47 ` Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 12/23] KVM: arm64: Widen the scope of "protected" VMs Suzuki K Poulose
2026-09-17 11:44 ` Marc Zyngier
2026-09-17 17:06 ` Suzuki K Poulose
2026-09-17 11:51 ` Fuad Tabba
2026-09-17 16:48 ` Suzuki K Poulose [this message]
2026-09-17 14:16 ` Joey Gouly
2026-09-15 16:01 ` [PATCH v18 13/23] KVM: arm64: Add a helper for VMs running on hyp that don't trust the host Suzuki K Poulose
2026-09-17 11:55 ` Fuad Tabba
2026-09-15 16:01 ` [PATCH v18 14/23] KVM: arm64: CCA: Add a new mode for supporting Realm guests Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 15/23] KVM: arm64: CCA: Add VCPU load/put for Realms Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 16/23] KVM: arm64: CCA: Add bare minimal S2 operations for Realm Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 17/23] KVM: arm64: CCA: Introduce Realms Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 18/23] KVM: arm64: CCA: Mandate VGIC_V3 for Realms Suzuki K Poulose
2026-09-17 12:57 ` Fuad Tabba
2026-09-15 16:01 ` [PATCH v18 19/23] KVM: arm64: CCA: Support timers in realm RECs Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 20/23] KVM: arm64: CCA: Don't expose unsupported capabilities for realm guests Suzuki K Poulose
2026-09-17 13:16 ` Fuad Tabba
2026-09-17 14:56 ` Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 21/23] KVM: arm64: CCA: WARN on injected undef exceptions Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 22/23] KVM: arm64: CCA: Expose SVE VL register before VCPU finalization Suzuki K Poulose
2026-09-15 16:01 ` [PATCH v18 23/23] KVM: arm64: CCA: Control user register access for Realms Suzuki K Poulose
2026-09-16 19:23 ` [PATCH v18 00/23] KVM: arm64: CCA: Add basic plumbing " Mathieu Poirier
2026-09-17 14:32 ` Fuad Tabba
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