diff options
| author | Joerg Roedel | 2010-02-08 14:44:49 +0100 |
|---|---|---|
| committer | Joerg Roedel | 2010-03-01 14:16:22 +0100 |
| commit | 5d214fe6e808a8caa9cb6f610c0190d3f50ac570 (patch) | |
| tree | 326b6d2ea83d9a5df8ea4eef91834dc3e0da2bac /arch/x86/include/asm/amd_iommu_types.h | |
| parent | x86/amd-iommu: Remove double NULL check in check_device (diff) | |
| download | kernel-qcow2-linux-5d214fe6e808a8caa9cb6f610c0190d3f50ac570.tar.gz kernel-qcow2-linux-5d214fe6e808a8caa9cb6f610c0190d3f50ac570.tar.xz kernel-qcow2-linux-5d214fe6e808a8caa9cb6f610c0190d3f50ac570.zip | |
x86/amd-iommu: Protect IOMMU-API map/unmap path
This patch introduces a mutex to lock page table updates in
the IOMMU-API path. We can't use the spin_lock here because
this patch might sleep.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/include/asm/amd_iommu_types.h')
| -rw-r--r-- | arch/x86/include/asm/amd_iommu_types.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/include/asm/amd_iommu_types.h b/arch/x86/include/asm/amd_iommu_types.h index ba19ad4c47d0..5e46e78f3b1b 100644 --- a/arch/x86/include/asm/amd_iommu_types.h +++ b/arch/x86/include/asm/amd_iommu_types.h @@ -21,6 +21,7 @@ #define _ASM_X86_AMD_IOMMU_TYPES_H #include <linux/types.h> +#include <linux/mutex.h> #include <linux/list.h> #include <linux/spinlock.h> @@ -237,6 +238,7 @@ struct protection_domain { struct list_head list; /* for list of all protection domains */ struct list_head dev_list; /* List of all devices in this domain */ spinlock_t lock; /* mostly used to lock the page table*/ + struct mutex api_lock; /* protect page tables in the iommu-api path */ u16 id; /* the domain id written to the device table */ int mode; /* paging mode (0-6 levels) */ u64 *pt_root; /* page table root pointer */ |