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From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: Marc Zyngier <maz@kernel.org>
Cc: 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, tabba@google.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 10/23] KVM: arm64: Add VM specific callback for S2 MMU operations
Date: Sat, 3 Oct 2026 17:12:28 +0100	[thread overview]
Message-ID: <ce2e8885-d848-48d3-b82e-49fcd9a6cfcc@arm.com> (raw)
In-Reply-To: <9873fb9d-6f32-46f6-bcac-6a52e293d011@arm.com>

On 03/10/2026 16:30, Suzuki K Poulose wrote:
> On 03/10/2026 10:01, Marc Zyngier wrote:
>> On Thu, 01 Oct 2026 22:06:50 +0100,
>> Suzuki K Poulose <suzuki.poulose@arm.com> wrote:
>>>
>>> Add VM type specific S2 MMU operation backends which can be 
>>> initialized per
>>> VM flavor, to keep the handling cleaner.
>>>
>>> Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
>>> Tested-by: Gavin Shan <gshan@redhat.com>
>>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>>> ---
>>> Changes since v19:
>>>   - Add a blank line in kvm_arch_flush_remote_tlbs()
> 
> 
>>>   struct kvm_s2_mmu {
>>>       struct kvm_vmid vmid;
>>> @@ -332,6 +345,8 @@ struct kvm_arch {
>>>        */
>>>       u64 fgu[__NR_FGT_GROUP_IDS__];
>>> +    const struct kvm_vm_s2_ops *vm_s2_ops;
>>> +
>>
>> If you're touching this patch, can you please move this pointer next
>> to the vcpu_ops pointer?
> 
> Sure, I will do that.

Sorry, this is only stored in kvm_arch, while the vcpu_ops are stored
in the vcpu_arch, to avoid pointer chasing vcpu->kvm->arch->.

I could move it closer to the vm_flavor ?

Cheers
Suzuki


  reply	other threads:[~2026-10-03 16:12 UTC|newest]

Thread overview: 51+ 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
2026-10-02 15:30               ` Fuad Tabba
2026-10-03  5:53               ` Suzuki K Poulose
2026-10-03  7:07                 ` Suzuki K Poulose
2026-10-03  8:45                   ` Marc Zyngier
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
2026-10-03  9:01   ` Marc Zyngier
2026-10-03 15:30     ` Suzuki K Poulose
2026-10-03 16:12       ` Suzuki K Poulose [this message]
2026-10-03 17:32         ` Marc Zyngier
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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