From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Alex Williamson <alex.williamson@redhat.com>
Cc: kevin.tian@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org,
sanjay.k.kumar@intel.com, iommu@lists.linux-foundation.org,
linux-kernel@vger.kernel.org, yi.y.sun@intel.com
Subject: [PATCH v4 6/7] iommu/vt-d: Use iova over first level
Date: Thu, 19 Dec 2019 11:16:33 +0800 [thread overview]
Message-ID: <20191219031634.15168-7-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20191219031634.15168-1-baolu.lu@linux.intel.com>
After we make all map/unmap paths support first level page table.
Let's turn it on if hardware supports scalable mode.
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
drivers/iommu/intel-iommu.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 57ca1d2f0e55..6a2b2d72c7a5 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -1761,15 +1761,13 @@ static void free_dmar_iommu(struct intel_iommu *iommu)
/*
* Check and return whether first level is used by default for
- * DMA translation. Currently, we make it off by setting
- * first_level_support = 0, and will change it to -1 after all
- * map/unmap paths support first level page table.
+ * DMA translation.
*/
static bool first_level_by_default(void)
{
struct dmar_drhd_unit *drhd;
struct intel_iommu *iommu;
- static int first_level_support = 0;
+ static int first_level_support = -1;
if (likely(first_level_support != -1))
return first_level_support;
--
2.17.1
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https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2019-12-19 3:17 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-19 3:16 [PATCH v4 0/7] Use 1st-level for IOVA translation Lu Baolu
2019-12-19 3:16 ` [PATCH v4 1/7] iommu/vt-d: Identify domains using first level page table Lu Baolu
2019-12-19 3:16 ` [PATCH v4 2/7] iommu/vt-d: Add set domain DOMAIN_ATTR_NESTING attr Lu Baolu
2019-12-19 3:16 ` [PATCH v4 3/7] iommu/vt-d: Add PASID_FLAG_FL5LP for first-level pasid setup Lu Baolu
2019-12-19 3:16 ` [PATCH v4 4/7] iommu/vt-d: Setup pasid entries for iova over first level Lu Baolu
2019-12-20 11:44 ` Liu, Yi L
2019-12-21 2:26 ` Lu Baolu
2019-12-19 3:16 ` [PATCH v4 5/7] iommu/vt-d: Flush PASID-based iotlb " Lu Baolu
2019-12-19 3:16 ` Lu Baolu [this message]
2019-12-19 3:16 ` [PATCH v4 7/7] iommu/vt-d: debugfs: Add support to show page table internals Lu Baolu
2019-12-20 11:50 ` [PATCH v4 0/7] Use 1st-level for IOVA translation Liu, Yi L
2019-12-21 2:51 ` Lu Baolu
2019-12-21 3:14 ` Lu Baolu
2019-12-22 7:00 ` Lu Baolu
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