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Commit 7d7a110c authored by Joerg Roedel's avatar Joerg Roedel
Browse files

amd-iommu: add function to flush tlb for all devices 



This function is required for suspend/resume support with AMD IOMMU
enabled.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent bfd1be18

arch/x86/include/asm/amd_iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -28,6 +28,7 @@ extern int amd_iommu_init_dma_ops(void); 
extern void amd_iommu_detect(void);

extern irqreturn_t amd_iommu_int_handler(int irq, void *data);

extern void amd_iommu_flush_all_domains(void);

extern void amd_iommu_flush_all_devices(void);

#else

static inline int amd_iommu_init(void) { return -ENODEV; }

static inline void amd_iommu_detect(void) { }

arch/x86/kernel/amd_iommu.c

+18 −0
Original line number Diff line number Diff line
@@ -460,6 +460,24 @@ void amd_iommu_flush_all_domains(void) 
	}

}



void amd_iommu_flush_all_devices(void)

{

	struct amd_iommu *iommu;

	int i;



	for (i = 0; i <= amd_iommu_last_bdf; ++i) {

		if (amd_iommu_pd_table[i] == NULL)

			continue;



		iommu = amd_iommu_rlookup_table[i];

		if (!iommu)

			continue;



		iommu_queue_inv_dev_entry(iommu, i);

		iommu_completion_wait(iommu);

	}

}



/****************************************************************************

 *

 * The functions below are used the create the page table mappings for