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| author | Suresh Siddha <suresh.b.siddha@intel.com> | 2011-08-23 17:05:19 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-21 10:21:52 +0200 |
| commit | c2c7286ac6d996a8ffc8d391d782ba35570b1236 (patch) | |
| tree | beb95a2a13b212bbb35d8c591e4fd83cb6182019 | |
| parent | 41750d31fc9599fd81763e685a6b7b42d298c4f8 (diff) | |
| download | linux-c2c7286ac6d996a8ffc8d391d782ba35570b1236.tar.gz linux-c2c7286ac6d996a8ffc8d391d782ba35570b1236.tar.bz2 linux-c2c7286ac6d996a8ffc8d391d782ba35570b1236.zip | |
intr_remap: Call dmar_dev_scope_init() explicitly
Both DMA-remapping aswell as Interrupt-remapping depend on the
dmar dev scope to be initialized. When both DMA and
IRQ-remapping are enabled, we depend on DMA-remapping init code
to call dmar_dev_scope_init(). This resulted in not doing this
init when DMA-remapping was turned off but interrupt-remapping
turned on in the kernel config.
This caused interrupt routing to break with CONFIG_INTR_REMAP=y
and CONFIG_DMAR=n.
This issue was introduced by this commit:
| commit 9d5ce73a64be2be8112147a3e0b551ad9cd1247b
| Author: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
| Date: Tue Nov 10 19:46:16 2009 +0900
|
| x86: intel-iommu: Convert detect_intel_iommu to use iommu_init hook
Fix this by calling dmar_dev_scope_init() explicitly from the
interrupt remapping code too.
Reported-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: yinghai@kernel.org
Cc: youquan.song@intel.com
Cc: joerg.roedel@amd.com
Cc: tony.luck@intel.com
Cc: dwmw2@infradead.org
Link: http://lkml.kernel.org/r/20110824001456.229207526@sbsiddha-desk.sc.intel.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | drivers/iommu/dmar.c | 15 | ||||
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 6 | ||||
| -rw-r--r-- | drivers/iommu/intr_remapping.c | 9 |
3 files changed, 22 insertions, 8 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index c4a0235a4fdb..17adf1ebcb13 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -557,13 +557,17 @@ dmar_find_matched_drhd_unit(struct pci_dev *dev) int __init dmar_dev_scope_init(void) { + static int dmar_dev_scope_initialized; struct dmar_drhd_unit *drhd, *drhd_n; int ret = -ENODEV; + if (dmar_dev_scope_initialized) + return dmar_dev_scope_initialized; + list_for_each_entry_safe(drhd, drhd_n, &dmar_drhd_units, list) { ret = dmar_parse_dev(drhd); if (ret) - return ret; + goto fail; } #ifdef CONFIG_DMAR @@ -574,17 +578,22 @@ int __init dmar_dev_scope_init(void) list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { ret = rmrr_parse_dev(rmrr); if (ret) - return ret; + goto fail; } list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { ret = atsr_parse_dev(atsr); if (ret) - return ret; + goto fail; } } #endif + dmar_dev_scope_initialized = 1; + return 0; + +fail: + dmar_dev_scope_initialized = ret; return ret; } diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c621c98c99da..df69618177c5 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -3439,16 +3439,12 @@ int __init intel_iommu_init(void) return -ENODEV; } - if (dmar_dev_scope_init()) { + if (dmar_dev_scope_init() < 0) { if (force_on) panic("tboot: Failed to initialize DMAR device scope\n"); return -ENODEV; } - /* - * Check the need for DMA-remapping initialization now. - * Above initialization will also be used by Interrupt-remapping. - */ if (no_iommu || dmar_disabled) return -ENODEV; diff --git a/drivers/iommu/intr_remapping.c b/drivers/iommu/intr_remapping.c index 51a2ce9b8789..cfb0dd4bf0b6 100644 --- a/drivers/iommu/intr_remapping.c +++ b/drivers/iommu/intr_remapping.c @@ -773,6 +773,15 @@ int __init parse_ioapics_under_ir(void) return ir_supported; } +int ir_dev_scope_init(void) +{ + if (!intr_remapping_enabled) + return 0; + + return dmar_dev_scope_init(); +} +rootfs_initcall(ir_dev_scope_init); + void disable_intr_remapping(void) { struct dmar_drhd_unit *drhd; |