diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2011-07-19 16:19:51 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2011-09-13 11:12:17 +0200 |
commit | 1f5b3c3fd2d73d6b30e9ef6dcbf131a791d5cbbd (patch) | |
tree | 1d24f2510bd8c57f5e026bf9a7ff93999ed39577 /drivers/iommu/intel-iommu.c | |
parent | 289b4e7a48d91fbef7af819020d826ad9f49f568 (diff) | |
download | talos-obmc-linux-1f5b3c3fd2d73d6b30e9ef6dcbf131a791d5cbbd.tar.gz talos-obmc-linux-1f5b3c3fd2d73d6b30e9ef6dcbf131a791d5cbbd.zip |
locking, x86, iommu: Annotate iommu->register_lock as raw
The iommu->register_lock can be taken in atomic context and therefore
must not be preempted on -rt - annotate it.
In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'drivers/iommu/intel-iommu.c')
-rw-r--r-- | drivers/iommu/intel-iommu.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index c621c98c99da..bf4a63c2477c 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -932,7 +932,7 @@ static void iommu_set_root_entry(struct intel_iommu *iommu) addr = iommu->root_entry; - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); dmar_writeq(iommu->reg + DMAR_RTADDR_REG, virt_to_phys(addr)); writel(iommu->gcmd | DMA_GCMD_SRTP, iommu->reg + DMAR_GCMD_REG); @@ -941,7 +941,7 @@ static void iommu_set_root_entry(struct intel_iommu *iommu) IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_RTPS), sts); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } static void iommu_flush_write_buffer(struct intel_iommu *iommu) @@ -952,14 +952,14 @@ static void iommu_flush_write_buffer(struct intel_iommu *iommu) if (!rwbf_quirk && !cap_rwbf(iommu->cap)) return; - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); writel(iommu->gcmd | DMA_GCMD_WBF, iommu->reg + DMAR_GCMD_REG); /* Make sure hardware complete it */ IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (!(val & DMA_GSTS_WBFS)), val); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } /* return value determine if we need a write buffer flush */ @@ -986,14 +986,14 @@ static void __iommu_flush_context(struct intel_iommu *iommu, } val |= DMA_CCMD_ICC; - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); dmar_writeq(iommu->reg + DMAR_CCMD_REG, val); /* Make sure hardware complete it */ IOMMU_WAIT_OP(iommu, DMAR_CCMD_REG, dmar_readq, (!(val & DMA_CCMD_ICC)), val); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } /* return value determine if we need a write buffer flush */ @@ -1032,7 +1032,7 @@ static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, if (cap_write_drain(iommu->cap)) val |= DMA_TLB_WRITE_DRAIN; - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); /* Note: Only uses first TLB reg currently */ if (val_iva) dmar_writeq(iommu->reg + tlb_offset, val_iva); @@ -1042,7 +1042,7 @@ static void __iommu_flush_iotlb(struct intel_iommu *iommu, u16 did, IOMMU_WAIT_OP(iommu, tlb_offset + 8, dmar_readq, (!(val & DMA_TLB_IVT)), val); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); /* check IOTLB invalidation granularity */ if (DMA_TLB_IAIG(val) == 0) @@ -1158,7 +1158,7 @@ static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) u32 pmen; unsigned long flags; - spin_lock_irqsave(&iommu->register_lock, flags); + raw_spin_lock_irqsave(&iommu->register_lock, flags); pmen = readl(iommu->reg + DMAR_PMEN_REG); pmen &= ~DMA_PMEN_EPM; writel(pmen, iommu->reg + DMAR_PMEN_REG); @@ -1167,7 +1167,7 @@ static void iommu_disable_protect_mem_regions(struct intel_iommu *iommu) IOMMU_WAIT_OP(iommu, DMAR_PMEN_REG, readl, !(pmen & DMA_PMEN_PRS), pmen); - spin_unlock_irqrestore(&iommu->register_lock, flags); + raw_spin_unlock_irqrestore(&iommu->register_lock, flags); } static int iommu_enable_translation(struct intel_iommu *iommu) @@ -1175,7 +1175,7 @@ static int iommu_enable_translation(struct intel_iommu *iommu) u32 sts; unsigned long flags; - spin_lock_irqsave(&iommu->register_lock, flags); + raw_spin_lock_irqsave(&iommu->register_lock, flags); iommu->gcmd |= DMA_GCMD_TE; writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); @@ -1183,7 +1183,7 @@ static int iommu_enable_translation(struct intel_iommu *iommu) IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (sts & DMA_GSTS_TES), sts); - spin_unlock_irqrestore(&iommu->register_lock, flags); + raw_spin_unlock_irqrestore(&iommu->register_lock, flags); return 0; } @@ -1192,7 +1192,7 @@ static int iommu_disable_translation(struct intel_iommu *iommu) u32 sts; unsigned long flag; - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); iommu->gcmd &= ~DMA_GCMD_TE; writel(iommu->gcmd, iommu->reg + DMAR_GCMD_REG); @@ -1200,7 +1200,7 @@ static int iommu_disable_translation(struct intel_iommu *iommu) IOMMU_WAIT_OP(iommu, DMAR_GSTS_REG, readl, (!(sts & DMA_GSTS_TES)), sts); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); return 0; } @@ -3320,7 +3320,7 @@ static int iommu_suspend(void) for_each_active_iommu(iommu, drhd) { iommu_disable_translation(iommu); - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); iommu->iommu_state[SR_DMAR_FECTL_REG] = readl(iommu->reg + DMAR_FECTL_REG); @@ -3331,7 +3331,7 @@ static int iommu_suspend(void) iommu->iommu_state[SR_DMAR_FEUADDR_REG] = readl(iommu->reg + DMAR_FEUADDR_REG); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } return 0; @@ -3358,7 +3358,7 @@ static void iommu_resume(void) for_each_active_iommu(iommu, drhd) { - spin_lock_irqsave(&iommu->register_lock, flag); + raw_spin_lock_irqsave(&iommu->register_lock, flag); writel(iommu->iommu_state[SR_DMAR_FECTL_REG], iommu->reg + DMAR_FECTL_REG); @@ -3369,7 +3369,7 @@ static void iommu_resume(void) writel(iommu->iommu_state[SR_DMAR_FEUADDR_REG], iommu->reg + DMAR_FEUADDR_REG); - spin_unlock_irqrestore(&iommu->register_lock, flag); + raw_spin_unlock_irqrestore(&iommu->register_lock, flag); } for_each_active_iommu(iommu, drhd) |