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Commit 409afa44 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

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: default avatarJoerg Roedel <jroedel@suse.de>
parent ac3a7092

drivers/iommu/amd_iommu.c

+13 −5
Original line number Diff line number Diff line
@@ -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);

}