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authorJiang Liu <jiang.liu@linux.intel.com>2014-11-09 22:47:57 +0800
committerJoerg Roedel <jroedel@suse.de>2014-11-18 11:18:35 +0100
commit78d8e7046111425bb688cddc4303d79cb0f0d281 (patch)
tree5d3be87a35920d72efaf7100406c7058a3295f1e /include/linux/dmar.h
parentc2a0b538d2c778aef7bf2fbe7973229192c9a392 (diff)
iommu/vt-d: Dynamically allocate and free seq_id for DMAR units
Introduce functions to support dynamic IOMMU seq_id allocating and releasing, which will be used to support DMAR hotplug. Also rename IOMMU_UNITS_SUPPORTED as DMAR_UNITS_SUPPORTED. Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Reviewed-by: Yijing Wang <wangyijing@huawei.com> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/dmar.h')
-rw-r--r--include/linux/dmar.h6
1 files changed, 6 insertions, 0 deletions
diff --git a/include/linux/dmar.h b/include/linux/dmar.h
index 495df5e48f80..725204fc433e 100644
--- a/include/linux/dmar.h
+++ b/include/linux/dmar.h
@@ -30,6 +30,12 @@
struct acpi_dmar_header;
+#ifdef CONFIG_X86
+# define DMAR_UNITS_SUPPORTED MAX_IO_APICS
+#else
+# define DMAR_UNITS_SUPPORTED 64
+#endif
+
/* DMAR Flags */
#define DMAR_INTR_REMAP 0x1
#define DMAR_X2APIC_OPT_OUT 0x2