From: Joerg Roedel <joerg.roedel@amd.com>
Date: Tue, 5 May 2009 13:33:57 +0000 (+0200)
Subject: amd-iommu: add function to flush tlb for all domains
X-Git-Tag: v2.6.31-rc1~408^2~10^3~3
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bfd1be1857e5a3385bf146e02e6dc3dd4241bec1;p=karo-tx-linux.git

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

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

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
---

diff --git a/arch/x86/include/asm/amd_iommu.h b/arch/x86/include/asm/amd_iommu.h
index f712344329bc..1750e1f85d3c 100644
--- a/arch/x86/include/asm/amd_iommu.h
+++ b/arch/x86/include/asm/amd_iommu.h
@@ -27,6 +27,7 @@ extern int amd_iommu_init(void);
 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);
 #else
 static inline int amd_iommu_init(void) { return -ENODEV; }
 static inline void amd_iommu_detect(void) { }
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index d9e9dc141a1e..826ad079efc4 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -449,6 +449,17 @@ static void iommu_flush_domain(u16 domid)
 	}
 }
 
+void amd_iommu_flush_all_domains(void)
+{
+	int i;
+
+	for (i = 1; i < MAX_DOMAIN_ID; ++i) {
+		if (!test_bit(i, amd_iommu_pd_alloc_bitmap))
+			continue;
+		iommu_flush_domain(i);
+	}
+}
+
 /****************************************************************************
  *
  * The functions below are used the create the page table mappings for