The patch titled
Subject: x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2
has been added to the -mm tree. Its filename is
x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2.patch
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------------------------------------------------------
From: Mike Travis <travis@xxxxxxx>
Subject: x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2
Version 2: Fix compile error on ia64 (it uses the DMAR logic but does not
define MAX_IO_APICS.) Check to insure that iommu_bmp does not overflow.
Signed-off-by: Mike Travis <travis@xxxxxxx>
Signed-off-by: Jack Steiner <steiner@xxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Jack Steiner <steiner@xxxxxxx>
Cc: David Woodhouse <dwmw2@xxxxxxxxxxxxx>
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>
Cc: Daniel Rahn <drahn@xxxxxxxx>
Cc: Jesse Barnes <jbarnes@xxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/iommu/intel-iommu.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)
diff -puN drivers/iommu/intel-iommu.c~x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2 drivers/iommu/intel-iommu.c
--- a/drivers/iommu/intel-iommu.c~x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2
+++ a/drivers/iommu/intel-iommu.c
@@ -354,10 +354,17 @@ static int hw_pass_through = 1;
/* si_domain contains mulitple devices */
#define DOMAIN_FLAG_STATIC_IDENTITY (1 << 2)
+/* define the limit of IOMMUs supported in each domain */
+#ifdef CONFIG_X86
+#define IOMMU_UNITS_SUPPORTED MAX_IO_APICS
+#else
+#define IOMMU_UNITS_SUPPORTED 64
+#endif
+
struct dmar_domain {
int id; /* domain id */
int nid; /* node id */
- DECLARE_BITMAP(iommu_bmp, MAX_IO_APICS);
+ DECLARE_BITMAP(iommu_bmp, IOMMU_UNITS_SUPPORTED);
/* bitmap of iommus this domain uses*/
struct list_head devices; /* all devices' list */
@@ -2401,12 +2408,17 @@ static int __init init_dmars(void)
* endfor
*/
for_each_drhd_unit(drhd) {
- g_num_of_iommus++;
/*
* lock not needed as this is only incremented in the single
* threaded kernel __init code path all other access are read
* only
*/
+ if (g_num_of_iommus < IOMMU_UNITS_SUPPORTED)
+ g_num_of_iommus++;
+ else
+ printk_once(KERN_ERR,
+ "MAX number (%d) of IOMMUs supported exceeded\n",
+ IOMMU_UNITS_SUPPORTED);
}
g_iommus = kcalloc(g_num_of_iommus, sizeof(struct intel_iommu *),
_
Subject: Subject: x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2
Patches currently in -mm which might be from travis@xxxxxxx are
x86-pci-fix-identity-mapping-for-sandy-bridge.patch
x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics.patch
x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2.patch
x86-pci-increase-the-number-of-iommus-supported-to-be-max_io_apics-v2-fix.patch
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