Commit-ID: 7b7ebe806852e91bbdba33313394fd946d0a22fe
Gitweb: http://git.kernel.org/tip/7b7ebe806852e91bbdba33313394fd946d0a22fe
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Fri, 5 Jun 2015 13:42:47 +0800
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 8 Jun 2015 15:41:32 +0200
iommu: dmar: Extend struct irte for VT-d Posted-Interrupts
The IRTE (Interrupt Remapping Table Entry) is either an entry for
remapped or for posted interrupts. The hardware distiguishes between
remapped and posted entries by bit 15 in the low 64 bit of the
IRTE. If cleared the entry is remapped, if set it's posted.
The entries have common fields and dependent on the posted bit fields
with different meanings.
Extend struct irte to handle the differences between remap and posted
mode by having three structs in the unions:
- Shared
- Remapped
- Posted
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Joerg Roedel <joro@xxxxxxxxxx>
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
Cc: jiang.liu@xxxxxxxxxxxxxxx
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: dwmw2@xxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/1433482974-14614-3-git-send-email-feng.wu@xxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
include/linux/dmar.h | 70 +++++++++++++++++++++++++++++++++++++++++-----------
1 file changed, 55 insertions(+), 15 deletions(-)
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 8473756..0dbcabc 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -185,33 +185,73 @@ static inline int dmar_device_remove(void *handle)
struct irte {
union {
+ /* Shared between remapped and posted mode*/
struct {
- __u64 present : 1,
- fpd : 1,
- dst_mode : 1,
- redir_hint : 1,
- trigger_mode : 1,
- dlvry_mode : 3,
- avail : 4,
- __reserved_1 : 4,
- vector : 8,
- __reserved_2 : 8,
- dest_id : 32;
+ __u64 present : 1, /* 0 */
+ fpd : 1, /* 1 */
+ __res0 : 6, /* 2 - 6 */
+ avail : 4, /* 8 - 11 */
+ __res1 : 3, /* 12 - 14 */
+ pst : 1, /* 15 */
+ vector : 8, /* 16 - 23 */
+ __res2 : 40; /* 24 - 63 */
+ };
+
+ /* Remapped mode */
+ struct {
+ __u64 r_present : 1, /* 0 */
+ r_fpd : 1, /* 1 */
+ dst_mode : 1, /* 2 */
+ redir_hint : 1, /* 3 */
+ trigger_mode : 1, /* 4 */
+ dlvry_mode : 3, /* 5 - 7 */
+ r_avail : 4, /* 8 - 11 */
+ r_res0 : 4, /* 12 - 15 */
+ r_vector : 8, /* 16 - 23 */
+ r_res1 : 8, /* 24 - 31 */
+ dest_id : 32; /* 32 - 63 */
+ };
+
+ /* Posted mode */
+ struct {
+ __u64 p_present : 1, /* 0 */
+ p_fpd : 1, /* 1 */
+ p_res0 : 6, /* 2 - 7 */
+ p_avail : 4, /* 8 - 11 */
+ p_res1 : 2, /* 12 - 13 */
+ p_urgent : 1, /* 14 */
+ p_pst : 1, /* 15 */
+ p_vector : 8, /* 16 - 23 */
+ p_res2 : 14, /* 24 - 37 */
+ pda_l : 26; /* 38 - 63 */
};
__u64 low;
};
union {
+ /* Shared between remapped and posted mode*/
struct {
- __u64 sid : 16,
- sq : 2,
- svt : 2,
- __reserved_3 : 44;
+ __u64 sid : 16, /* 64 - 79 */
+ sq : 2, /* 80 - 81 */
+ svt : 2, /* 82 - 83 */
+ __res3 : 44; /* 84 - 127 */
+ };
+
+ /* Posted mode*/
+ struct {
+ __u64 p_sid : 16, /* 64 - 79 */
+ p_sq : 2, /* 80 - 81 */
+ p_svt : 2, /* 82 - 83 */
+ p_res3 : 12, /* 84 - 95 */
+ pda_h : 32; /* 96 - 127 */
};
__u64 high;
};
};
+#define PDA_LOW_BIT 26
+#define PDA_HIGH_BIT 32
+
enum {
IRQ_REMAP_XAPIC_MODE,
IRQ_REMAP_X2APIC_MODE,
--
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