Commit 58fc7f14 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Add support for invalidate_all command 



This patch adds support for the invalidate_all command
present in new versions of the AMD IOMMU.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent d99ddec3

arch/x86/include/asm/amd_iommu_types.h

+1 −0
Original line number Diff line number Diff line
@@ -127,6 +127,7 @@ 
#define CMD_COMPL_WAIT          0x01

#define CMD_INV_DEV_ENTRY       0x02

#define CMD_INV_IOMMU_PAGES     0x03

#define CMD_INV_ALL		0x08



#define CMD_COMPL_WAIT_STORE_MASK	0x01

#define CMD_COMPL_WAIT_INT_MASK		0x02

arch/x86/kernel/amd_iommu.c

+22 −2
Original line number Diff line number Diff line
@@ -463,6 +463,12 @@ static void build_inv_iommu_pages(struct iommu_cmd *cmd, u64 address, 
		cmd->data[2] |= CMD_INV_IOMMU_PAGES_PDE_MASK;

}



static void build_inv_all(struct iommu_cmd *cmd)

{

	memset(cmd, 0, sizeof(*cmd));

	CMD_SET_TYPE(cmd, CMD_INV_ALL);

}



/*

 * Writes the command to the IOMMUs command buffer and informs the

 * hardware about the new command.
@@ -567,11 +573,25 @@ static void iommu_flush_tlb_all(struct amd_iommu *iommu) 
	iommu_completion_wait(iommu);

}



static void iommu_flush_all(struct amd_iommu *iommu)

{

	struct iommu_cmd cmd;



	build_inv_all(&cmd);



	iommu_queue_command(iommu, &cmd);

	iommu_completion_wait(iommu);

}



void iommu_flush_all_caches(struct amd_iommu *iommu)

{

	if (iommu_feature(iommu, FEATURE_IA)) {

		iommu_flush_all(iommu);

	} else {

		iommu_flush_dte_all(iommu);

		iommu_flush_tlb_all(iommu);

	}

}



/*

 * Command send function for invalidating a device table entry