From: Joerg Roedel <joro@8bytes.org>
To: Alex Williamson <alex.williamson@redhat.com>,
Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, jroedel@suse.de
Subject: [PATCH 2/7] iommu/amd: Introduce free_sub_pt() function
Date: Fri, 9 Nov 2018 12:07:07 +0100 [thread overview]
Message-ID: <20181109110712.12469-3-joro@8bytes.org> (raw)
In-Reply-To: <20181109110712.12469-1-joro@8bytes.org>
From: Joerg Roedel <jroedel@suse.de>
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>
---
drivers/iommu/amd_iommu.c | 18 +++++++++++++-----
1 file 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);
}
--
2.17.1
next prev parent reply other threads:[~2018-11-09 11:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-09 11:07 [PATCH 0/7] iommu/amd: Always allow to map huge pages Joerg Roedel
2018-11-09 11:07 ` [PATCH 1/7] iommu/amd: Collect page-table pages in freelist Joerg Roedel
2018-11-09 11:07 ` Joerg Roedel [this message]
2018-11-09 11:07 ` [PATCH 3/7] iommu/amd: Ignore page-mode 7 in free_sub_pt() Joerg Roedel
2018-11-09 11:07 ` [PATCH 4/7] iommu/amd: Allow downgrading page-sizes in alloc_pte() Joerg Roedel
2018-11-09 11:07 ` [PATCH 5/7] iommu/amd: Restart loop if cmpxchg64 succeeded " Joerg Roedel
2018-11-09 11:07 ` [PATCH 6/7] iommu/amd: Allow to upgrade page-size Joerg Roedel
2018-11-09 11:07 ` [PATCH 7/7] vfio/type1: Remove map_try_harder() code path Joerg Roedel
2018-11-09 16:23 ` Alex Williamson
2018-11-15 15:55 ` Joerg Roedel
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