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authorMark McLoughlin <markmc@redhat.com>2008-04-02 15:36:36 +0100
committerIngo Molnar <mingo@elte.hu>2008-04-04 18:36:48 +0200
commitf64337062c09c2c318fbcbf44ed1d739e8bc72ab (patch)
treefa0b44044379c5781aba6b3115b038a05e7fa413 /arch
parent8f59610de2fb244b5bc1a3feafd328a8d4d511d6 (diff)
downloadop-kernel-dev-f64337062c09c2c318fbcbf44ed1d739e8bc72ab.zip
op-kernel-dev-f64337062c09c2c318fbcbf44ed1d739e8bc72ab.tar.gz
xen: refactor xen_{alloc,release}_{pt,pd}()
Signed-off-by: Mark McLoughlin <markmc@redhat.com> Cc: xen-devel@lists.xensource.com Cc: Mark McLoughlin <markmc@redhat.com> Cc: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/enlighten.c27
-rw-r--r--arch/x86/xen/mmu.c7
-rw-r--r--arch/x86/xen/mmu.h7
3 files changed, 27 insertions, 14 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index de4e6f0..16e2f80 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -667,10 +667,10 @@ static void xen_release_pt_init(u32 pfn)
make_lowmem_page_readwrite(__va(PFN_PHYS(pfn)));
}
-static void pin_pagetable_pfn(unsigned level, unsigned long pfn)
+static void pin_pagetable_pfn(unsigned cmd, unsigned long pfn)
{
struct mmuext_op op;
- op.cmd = level;
+ op.cmd = cmd;
op.arg1.mfn = pfn_to_mfn(pfn);
if (HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF))
BUG();
@@ -687,7 +687,10 @@ static void xen_alloc_ptpage(struct mm_struct *mm, u32 pfn, unsigned level)
if (!PageHighMem(page)) {
make_lowmem_page_readonly(__va(PFN_PHYS(pfn)));
- pin_pagetable_pfn(level, pfn);
+ if (level == PT_PTE)
+ pin_pagetable_pfn(MMUEXT_PIN_L1_TABLE, pfn);
+ else if (level == PT_PMD)
+ pin_pagetable_pfn(MMUEXT_PIN_L2_TABLE, pfn);
} else
/* make sure there are no stray mappings of
this page */
@@ -697,16 +700,16 @@ static void xen_alloc_ptpage(struct mm_struct *mm, u32 pfn, unsigned level)
static void xen_alloc_pt(struct mm_struct *mm, u32 pfn)
{
- xen_alloc_ptpage(mm, pfn, MMUEXT_PIN_L1_TABLE);
+ xen_alloc_ptpage(mm, pfn, PT_PTE);
}
static void xen_alloc_pd(struct mm_struct *mm, u32 pfn)
{
- xen_alloc_ptpage(mm, pfn, MMUEXT_PIN_L2_TABLE);
+ xen_alloc_ptpage(mm, pfn, PT_PMD);
}
/* This should never happen until we're OK to use struct page */
-static void xen_release_pt(u32 pfn)
+static void xen_release_ptpage(u32 pfn, unsigned level)
{
struct page *page = pfn_to_page(pfn);
@@ -718,6 +721,16 @@ static void xen_release_pt(u32 pfn)
}
}
+static void xen_release_pt(u32 pfn)
+{
+ xen_release_ptpage(pfn, PT_PTE);
+}
+
+static void xen_release_pd(u32 pfn)
+{
+ xen_release_ptpage(pfn, PT_PMD);
+}
+
#ifdef CONFIG_HIGHPTE
static void *xen_kmap_atomic_pte(struct page *page, enum km_type type)
{
@@ -838,7 +851,7 @@ static __init void xen_pagetable_setup_done(pgd_t *base)
pv_mmu_ops.alloc_pt = xen_alloc_pt;
pv_mmu_ops.alloc_pd = xen_alloc_pd;
pv_mmu_ops.release_pt = xen_release_pt;
- pv_mmu_ops.release_pd = xen_release_pt;
+ pv_mmu_ops.release_pd = xen_release_pd;
pv_mmu_ops.set_pte = xen_set_pte;
setup_shared_info();
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 0144395..2a054ef 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -310,13 +310,6 @@ pgd_t xen_make_pgd(unsigned long pgd)
}
#endif /* CONFIG_X86_PAE */
-enum pt_level {
- PT_PGD,
- PT_PUD,
- PT_PMD,
- PT_PTE
-};
-
/*
(Yet another) pagetable walker. This one is intended for pinning a
pagetable. This means that it walks a pagetable and calls the
diff --git a/arch/x86/xen/mmu.h b/arch/x86/xen/mmu.h
index c9ff27f..b5e189b 100644
--- a/arch/x86/xen/mmu.h
+++ b/arch/x86/xen/mmu.h
@@ -3,6 +3,13 @@
#include <linux/linkage.h>
#include <asm/page.h>
+enum pt_level {
+ PT_PGD,
+ PT_PUD,
+ PT_PMD,
+ PT_PTE
+};
+
/*
* Page-directory addresses above 4GB do not fit into architectural %cr3.
* When accessing %cr3, or equivalent field in vcpu_guest_context, guests
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