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| author | Joerg Roedel <jroedel@suse.de> | 2018-11-09 12:07:07 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-11-15 16:40:53 +0100 |
| commit | 409afa44f9ba1443ef165a9e6d6a9cb5ad6ad176 (patch) | |
| tree | 7d1e2df4418fb47aa6c697448ce4f3b2cf000c0a /drivers/iommu | |
| parent | iommu/amd: Collect page-table pages in freelist (diff) | |
| download | linux-409afa44f9ba1443ef165a9e6d6a9cb5ad6ad176.tar.xz linux-409afa44f9ba1443ef165a9e6d6a9cb5ad6ad176.zip | |
iommu/amd: Introduce free_sub_pt() function
The function is a more generic version of free_pagetable()
and will be used to free only specific sub-trees of a
page-table.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 18 |
1 files changed, 13 insertions, 5 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 2655bd91af93..1186571f77e1 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1367,12 +1367,10 @@ DEFINE_FREE_PT_FN(l4, free_pt_l3) DEFINE_FREE_PT_FN(l5, free_pt_l4) DEFINE_FREE_PT_FN(l6, free_pt_l5) -static void free_pagetable(struct protection_domain *domain) +static struct page *free_sub_pt(unsigned long root, int mode, + struct page *freelist) { - unsigned long root = (unsigned long)domain->pt_root; - struct page *freelist = NULL; - - switch (domain->mode) { + switch (mode) { case PAGE_MODE_NONE: break; case PAGE_MODE_1_LEVEL: @@ -1397,6 +1395,16 @@ static void free_pagetable(struct protection_domain *domain) BUG(); } + return freelist; +} + +static void free_pagetable(struct protection_domain *domain) +{ + unsigned long root = (unsigned long)domain->pt_root; + struct page *freelist = NULL; + + free_sub_pt(root, domain->mode, freelist); + free_page_list(freelist); } |