linux-kernel - Re: [PATCH v2 01/10] iommu/arm-smmu-v3: Store IOTLB cache tags in struct arm_smmu_attach

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20260126204443.GX1134360@nvidia.com>
Date: Mon, 26 Jan 2026 16:44:43 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: Nicolin Chen <nicolinc@...dia.com>
Cc: will@...nel.org, robin.murphy@....com, joro@...tes.org, jpb@...nel.org,
	praan@...gle.com, miko.lenczewski@....com,
	linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
	linux-kernel@...r.kernel.org, patches@...ts.linux.dev
Subject: Re: [PATCH v2 01/10] iommu/arm-smmu-v3: Store IOTLB cache tags in
 struct arm_smmu_attach_state

On Wed, Jan 21, 2026 at 05:24:19PM -0800, Nicolin Chen wrote:
> +int arm_smmu_domain_get_iotlb_tag(struct arm_smmu_domain *smmu_domain,
> +				  struct arm_smmu_device *smmu,
> +				  struct arm_smmu_inv *tag)
> +{
> +	/* Decide the type of the iotlb cache tag */
> +	switch (smmu_domain->stage) {
> +	case ARM_SMMU_DOMAIN_SVA:
> +	case ARM_SMMU_DOMAIN_S1:
> +		tag->type = INV_TYPE_S1_ASID;
> +		break;
> +	case ARM_SMMU_DOMAIN_S2:
> +		tag->type = INV_TYPE_S2_VMID;
> +		break;
> +	default:
> +		return -EINVAL;
> +	}
> +
> +	tag->smmu = smmu;
> +
> +	if (tag->type == INV_TYPE_S1_ASID)
> +		tag->id = smmu_domain->cd.asid;
> +	else
> +		tag->id = smmu_domain->s2_cfg.vmid;

Would be tidier to move these up into the case

Otherwise looks OK

Reviewed-by: Jason Gunthorpe <jgg@...dia.com>

Jason