Commit 0edeab66 authored by Lu Baolu's avatar Lu Baolu Committed by Joerg Roedel
Browse files

iommu: Remove unrecoverable fault data 



The unrecoverable fault data is not used anywhere. Remove it to avoid
dead code.

Suggested-by: default avatarKevin Tian <kevin.tian@intel.com>
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Tested-by: default avatarYan Zhao <yan.y.zhao@intel.com>
Tested-by: default avatarLongfang Liu <liulongfang@huawei.com>
Link: https://lore.kernel.org/r/20240212012227.119381-4-baolu.lu@linux.intel.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 66014df7

include/linux/iommu.h

+2 −70
Original line number Diff line number Diff line
@@ -50,67 +50,7 @@ struct iommu_dma_cookie; 


/* Generic fault types, can be expanded IRQ remapping fault */

enum iommu_fault_type {

	IOMMU_FAULT_DMA_UNRECOV = 1,	/* unrecoverable fault */

	IOMMU_FAULT_PAGE_REQ,		/* page request fault */

};



enum iommu_fault_reason {

	IOMMU_FAULT_REASON_UNKNOWN = 0,



	/* Could not access the PASID table (fetch caused external abort) */

	IOMMU_FAULT_REASON_PASID_FETCH,



	/* PASID entry is invalid or has configuration errors */

	IOMMU_FAULT_REASON_BAD_PASID_ENTRY,



	/*

	 * PASID is out of range (e.g. exceeds the maximum PASID

	 * supported by the IOMMU) or disabled.

	 */

	IOMMU_FAULT_REASON_PASID_INVALID,



	/*

	 * An external abort occurred fetching (or updating) a translation

	 * table descriptor

	 */

	IOMMU_FAULT_REASON_WALK_EABT,



	/*

	 * Could not access the page table entry (Bad address),

	 * actual translation fault

	 */

	IOMMU_FAULT_REASON_PTE_FETCH,



	/* Protection flag check failed */

	IOMMU_FAULT_REASON_PERMISSION,



	/* access flag check failed */

	IOMMU_FAULT_REASON_ACCESS,



	/* Output address of a translation stage caused Address Size fault */

	IOMMU_FAULT_REASON_OOR_ADDRESS,

};



/**

 * struct iommu_fault_unrecoverable - Unrecoverable fault data

 * @reason: reason of the fault, from &enum iommu_fault_reason

 * @flags: parameters of this fault (IOMMU_FAULT_UNRECOV_* values)

 * @pasid: Process Address Space ID

 * @perm: requested permission access using by the incoming transaction

 *        (IOMMU_FAULT_PERM_* values)

 * @addr: offending page address

 * @fetch_addr: address that caused a fetch abort, if any

 */

struct iommu_fault_unrecoverable {

	__u32	reason;

#define IOMMU_FAULT_UNRECOV_PASID_VALID		(1 << 0)

#define IOMMU_FAULT_UNRECOV_ADDR_VALID		(1 << 1)

#define IOMMU_FAULT_UNRECOV_FETCH_ADDR_VALID	(1 << 2)

	__u32	flags;

	__u32	pasid;

	__u32	perm;

	__u64	addr;

	__u64	fetch_addr;

	IOMMU_FAULT_PAGE_REQ = 1,	/* page request fault */

};



/**
@@ -142,19 +82,11 @@ struct iommu_fault_page_request { 
/**

 * struct iommu_fault - Generic fault data

 * @type: fault type from &enum iommu_fault_type

 * @padding: reserved for future use (should be zero)

 * @event: fault event, when @type is %IOMMU_FAULT_DMA_UNRECOV

 * @prm: Page Request message, when @type is %IOMMU_FAULT_PAGE_REQ

 * @padding2: sets the fault size to allow for future extensions

 */

struct iommu_fault {

	__u32	type;

	__u32	padding;

	union {

		struct iommu_fault_unrecoverable event;

	struct iommu_fault_page_request prm;

		__u8 padding2[56];

	};

};



/**