Commit-ID: 2705a3d2a690c3dd9f58c7d788bc0f432acdeceb Gitweb: http://git.kernel.org/tip/2705a3d2a690c3dd9f58c7d788bc0f432acdeceb Author: Feng Wu <feng...@intel.com> AuthorDate: Tue, 9 Jun 2015 13:20:32 +0800 Committer: Thomas Gleixner <t...@linutronix.de> CommitDate: Fri, 12 Jun 2015 11:33:52 +0200
iommu, x86: Save the mode (posted or remapped) of an IRTE Add a new field to struct irq_2_iommu, which captures whether the associated IRTE is in posted mode or remapped mode. We update this field when the IRTE is written into the table. Suggested-by: Thomas Gleixner <t...@linutronix.de> Signed-off-by: Feng Wu <feng...@intel.com> Reviewed-by: Thomas Gleixner <t...@linutronix.de> Acked-by: Joerg Roedel <j...@8bytes.org> Cc: jiang....@linux.intel.com Cc: io...@lists.linux-foundation.org Cc: dw...@infradead.org Link: http://lkml.kernel.org/r/1433827237-3382-6-git-send-email-feng...@intel.com Signed-off-by: Thomas Gleixner <t...@linutronix.de> --- drivers/iommu/intel_irq_remapping.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index a643eec..68bce0a 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -18,6 +18,11 @@ #include "irq_remapping.h" +enum irq_mode { + IRQ_REMAPPING, + IRQ_POSTING, +}; + struct ioapic_scope { struct intel_iommu *iommu; unsigned int id; @@ -37,6 +42,7 @@ struct irq_2_iommu { u16 irte_index; u16 sub_handle; u8 irte_mask; + enum irq_mode mode; }; struct intel_ir_data { @@ -104,6 +110,7 @@ static int alloc_irte(struct intel_iommu *iommu, int irq, irq_iommu->irte_index = index; irq_iommu->sub_handle = 0; irq_iommu->irte_mask = mask; + irq_iommu->mode = IRQ_REMAPPING; } raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); @@ -144,6 +151,9 @@ static int modify_irte(struct irq_2_iommu *irq_iommu, __iommu_flush_cache(iommu, irte, sizeof(*irte)); rc = qi_flush_iec(iommu, index, 0); + + /* Update iommu mode according to the IRTE mode */ + irq_iommu->mode = irte->pst ? IRQ_POSTING : IRQ_REMAPPING; raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); return rc; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
