From 58fc7f1419560efa9c426b829c195050e0147d7f Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Mon, 11 Apr 2011 11:13:24 +0200 Subject: 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: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 24 ++++++++++++++++++++++-- 1 file changed, 22 insertions(+), 2 deletions(-) (limited to 'arch/x86/kernel/amd_iommu.c') diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index bcf58ea..d6192bc 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -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); + } } /* -- cgit v1.1