linux-kernel - RE: [PATCH rc] iommufd: Explicitize struct iommu_hwpt

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Message-ID: <BN9PR11MB5276F3057E4F8DFA3F22E3C48CE72@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Mon, 20 Jan 2025 05:44:27 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: Nicolin Chen <nicolinc@...dia.com>, "jgg@...dia.com" <jgg@...dia.com>
CC: "baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH rc] iommufd: Explicitize struct iommu_hwpt_pgfault padding

> From: Nicolin Chen <nicolinc@...dia.com>
> Sent: Saturday, January 18, 2025 10:37 AM
> 
> @@ -868,6 +868,7 @@ enum iommu_hwpt_pgfault_perm {
>   * @pasid: Process Address Space ID
>   * @grpid: Page Request Group Index
>   * @perm: Combination of enum iommu_hwpt_pgfault_perm
> + * @__reserved: Must be 0.

iommufd_fault_fops_read() doesn't follow this statement as
hwpt_fault is on stack with that field uninitialized.