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Commit e394d72a authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Introduce function for iommu-local domain flush 



This patch introduces a function to flush all domain tlbs
for on one given IOMMU. This is required later to reset the
command buffer on one IOMMU.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 945b4ac4

arch/x86/kernel/amd_iommu.c

+33 −16
Original line number Diff line number Diff line
@@ -465,38 +465,55 @@ static void iommu_flush_tlb_pde(struct amd_iommu *iommu, u16 domid) 
}



/*

 * This function is used to flush the IO/TLB for a given protection domain

 * on every IOMMU in the system

 * This function flushes one domain on one IOMMU

 */

static void iommu_flush_domain(u16 domid)

static void flush_domain_on_iommu(struct amd_iommu *iommu, u16 domid)

{

	unsigned long flags;

	struct amd_iommu *iommu;

	struct iommu_cmd cmd;



	INC_STATS_COUNTER(domain_flush_all);

	unsigned long flags;



	__iommu_build_inv_iommu_pages(&cmd, CMD_INV_IOMMU_ALL_PAGES_ADDRESS,

				      domid, 1, 1);



	for_each_iommu(iommu) {

	spin_lock_irqsave(&iommu->lock, flags);

	__iommu_queue_command(iommu, &cmd);

	__iommu_completion_wait(iommu);

	__iommu_wait_for_completion(iommu);

	spin_unlock_irqrestore(&iommu->lock, flags);

}

}



void amd_iommu_flush_all_domains(void)

static void flush_all_domains_on_iommu(struct amd_iommu *iommu)

{

	int i;



	for (i = 1; i < MAX_DOMAIN_ID; ++i) {

		if (!test_bit(i, amd_iommu_pd_alloc_bitmap))

			continue;

		iommu_flush_domain(i);

		flush_domain_on_iommu(iommu, i);

	}



}



/*

 * This function is used to flush the IO/TLB for a given protection domain

 * on every IOMMU in the system

 */

static void iommu_flush_domain(u16 domid)

{

	struct amd_iommu *iommu;



	INC_STATS_COUNTER(domain_flush_all);



	for_each_iommu(iommu)

		flush_domain_on_iommu(iommu, domid);

}



void amd_iommu_flush_all_domains(void)

{

	struct amd_iommu *iommu;



	for_each_iommu(iommu)

		flush_all_domains_on_iommu(iommu);

}



void amd_iommu_flush_all_devices(void)