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| author | Joerg Roedel <joerg.roedel@amd.com> | 2008-09-05 14:29:07 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-19 12:59:11 +0200 |
| commit | 335503e57b6b8de04cec5d27eb2c3d09ff98905b (patch) | |
| tree | a2f33f3a2a668e832273aa0b18608ef51e90a742 /include/asm-x86 | |
| parent | 6d4f343f84993eb0d5864c0823dc9babd171a33a (diff) | |
| download | kernel-crypto-335503e57b6b8de04cec5d27eb2c3d09ff98905b.tar.gz kernel-crypto-335503e57b6b8de04cec5d27eb2c3d09ff98905b.tar.xz kernel-crypto-335503e57b6b8de04cec5d27eb2c3d09ff98905b.zip | |
AMD IOMMU: add event buffer allocation
This patch adds the allocation of a event buffer for each AMD IOMMU in
the system. The hardware will log events like device page faults or
other errors to this buffer once this is enabled.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86')
| -rw-r--r-- | include/asm-x86/amd_iommu_types.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-x86/amd_iommu_types.h b/include/asm-x86/amd_iommu_types.h index dcc472445ff..8b8cd0c60b3 100644 --- a/include/asm-x86/amd_iommu_types.h +++ b/include/asm-x86/amd_iommu_types.h @@ -116,6 +116,10 @@ #define MMIO_CMD_SIZE_SHIFT 56 #define MMIO_CMD_SIZE_512 (0x9ULL << MMIO_CMD_SIZE_SHIFT) +/* constants for event buffer handling */ +#define EVT_BUFFER_SIZE 8192 /* 512 entries */ +#define EVT_LEN_MASK (0x9ULL << 56) + #define PAGE_MODE_1_LEVEL 0x01 #define PAGE_MODE_2_LEVEL 0x02 #define PAGE_MODE_3_LEVEL 0x03 @@ -243,6 +247,11 @@ struct amd_iommu { /* size of command buffer */ u32 cmd_buf_size; + /* event buffer virtual address */ + u8 *evt_buf; + /* size of event buffer */ + u32 evt_buf_size; + /* if one, we need to send a completion wait command */ int need_sync; |