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| author | Mark McLoughlin <markmc@redhat.com> | 2008-04-02 15:36:36 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-04-04 18:36:48 +0200 |
| commit | f64337062c09c2c318fbcbf44ed1d739e8bc72ab (patch) | |
| tree | fa0b44044379c5781aba6b3115b038a05e7fa413 /arch/x86/xen | |
| parent | 8f59610de2fb244b5bc1a3feafd328a8d4d511d6 (diff) | |
| download | linux-f64337062c09c2c318fbcbf44ed1d739e8bc72ab.tar.gz linux-f64337062c09c2c318fbcbf44ed1d739e8bc72ab.tar.bz2 linux-f64337062c09c2c318fbcbf44ed1d739e8bc72ab.zip | |
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/x86/xen')
| -rw-r--r-- | arch/x86/xen/enlighten.c | 27 | ||||
| -rw-r--r-- | arch/x86/xen/mmu.c | 7 | ||||
| -rw-r--r-- | arch/x86/xen/mmu.h | 7 |
3 files changed, 27 insertions, 14 deletions
diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c index de4e6f05840b..16e2f8096a1a 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 0144395448ae..2a054ef2a3da 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 c9ff27f3ac3a..b5e189b1519d 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 |