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x86/amd-iommu: Add support for invalidate_all command

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2011-04-11 11:13:24 +02:00
parent d99ddec3ee
commit 58fc7f1419
2 changed files with 23 additions and 2 deletions
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1
arch/x86/include/asm/amd_iommu_types.h
View file

@ -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

24
arch/x86/kernel/amd_iommu.c
View file

@ -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.
@ -567,10 +573,24 @@ 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)
{
iommu_flush_dte_all(iommu);
iommu_flush_tlb_all(iommu);
if (iommu_feature(iommu, FEATURE_IA)) {
iommu_flush_all(iommu);
} else {
iommu_flush_dte_all(iommu);
iommu_flush_tlb_all(iommu);
}
}
/*