From mboxrd@z Thu Jan 1 00:00:00 1970 From: Feng Wu Subject: [v8 4/9] iommu, x86: Save the mode (posted or remapped) of an IRTE Date: Wed, 27 May 2015 12:05:39 +0800 Message-ID: <1432699544-17444-5-git-send-email-feng.wu@intel.com> References: <1432699544-17444-1-git-send-email-feng.wu@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1432699544-17444-1-git-send-email-feng.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org Cc: tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, jiang.liu-VuQAYsv1563Yd54FQh9/CA@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: iommu@lists.linux-foundation.org This patch adds a new field in struct irq_2_iommu, which can capture whether the entry is in posted mode or remapped mode. Signed-off-by: Feng Wu Suggested-by: Thomas Gleixner --- drivers/iommu/intel_irq_remapping.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 1955b09..70a1b79 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 { @@ -105,6 +111,7 @@ 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); @@ -145,6 +152,8 @@ static int modify_irte(struct irq_2_iommu *irq_iommu, __iommu_flush_cache(iommu, irte, sizeof(*irte)); rc = qi_flush_iec(iommu, index, 0); + + irq_iommu->mode = irte->pst ? IRQ_POSTING : IRQ_REMAPPING; raw_spin_unlock_irqrestore(&irq_2_ir_lock, flags); return rc; -- 2.1.0