imrcpan/erofs-linux
1
0 Fork 0
mirror of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs.git synced 2026-11-09 02:51:11 +01:00
Code Issues Packages Projects Releases Wiki Activity

iommu/vt-d: Use iova over first level

Browse Source 
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 <[email protected]>
Signed-off-by: Joerg Roedel <[email protected]>
This commit is contained in:
Lu Baolu authored and Joerg Roedel committed 2020-01-07 14:05:58 +01:00
1 parent 64229e8f37
commit b802d070a5
1 file changed
+2 -4
Download Patch File Download Diff File Expand all files Collapse all files
drivers/iommu/intel-iommu.c
+2 -4
View File
@@ -1770,15 +1770,13 @@ 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;