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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] No need to pin/unpin intermediate pagetables in x86/64 xenlinux.
# HG changeset patch
# User kaf24@xxxxxxxxxxxxxxxxxxxx
# Node ID 57f21f67b532c65758fd9d6a9fde36183caa0296
# Parent 9aefef31e0407b027e992cb5e42ade033a0d292a
No need to pin/unpin intermediate pagetables in x86/64 xenlinux.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
diff -r 9aefef31e040 -r 57f21f67b532
linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c
--- a/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c Sun Mar 12 18:37:00 2006
+++ b/linux-2.6-xen-sparse/arch/i386/mm/hypervisor.c Sun Mar 12 18:37:38 2006
@@ -201,56 +201,6 @@
BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
}
-void xen_pte_pin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_PIN_L1_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-
-void xen_pte_unpin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_UNPIN_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-
-#ifdef CONFIG_X86_64
-void xen_pud_pin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_PIN_L3_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-
-void xen_pud_unpin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_UNPIN_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-
-void xen_pmd_pin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_PIN_L2_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-
-void xen_pmd_unpin(unsigned long ptr)
-{
- struct mmuext_op op;
- op.cmd = MMUEXT_UNPIN_TABLE;
- op.arg1.mfn = pfn_to_mfn(ptr >> PAGE_SHIFT);
- BUG_ON(HYPERVISOR_mmuext_op(&op, 1, NULL, DOMID_SELF) < 0);
-}
-#endif /* CONFIG_X86_64 */
-
void xen_set_ldt(unsigned long ptr, unsigned long len)
{
struct mmuext_op op;
diff -r 9aefef31e040 -r 57f21f67b532
linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c
--- a/linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c Sun Mar 12 18:37:00 2006
+++ b/linux-2.6-xen-sparse/arch/x86_64/mm/init-xen.c Sun Mar 12 18:37:38 2006
@@ -244,7 +244,6 @@
if (pud_none(*pud)) {
pmd = (pmd_t *) spp_getpage();
make_page_readonly(pmd, XENFEAT_writable_page_tables);
- xen_pmd_pin(__pa(pmd));
set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
if (pmd != pmd_offset(pud, 0)) {
printk("PAGETABLE BUG #01! %p <-> %p\n", pmd,
pmd_offset(pud,0));
@@ -255,7 +254,6 @@
if (pmd_none(*pmd)) {
pte = (pte_t *) spp_getpage();
make_page_readonly(pte, XENFEAT_writable_page_tables);
- xen_pte_pin(__pa(pte));
set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
if (pte != pte_offset_kernel(pmd, 0)) {
printk("PAGETABLE BUG #02!\n");
@@ -297,7 +295,6 @@
pmd = (pmd_t *) spp_getpage();
make_page_readonly(pmd, XENFEAT_writable_page_tables);
- xen_pmd_pin(__pa(pmd));
set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE | _PAGE_USER));
@@ -311,7 +308,6 @@
if (pmd_none(*pmd)) {
pte = (pte_t *) spp_getpage();
make_page_readonly(pte, XENFEAT_writable_page_tables);
- xen_pte_pin(__pa(pte));
set_pmd(pmd, __pmd(__pa(pte) | _KERNPG_TABLE | _PAGE_USER));
if (pte != pte_offset_kernel(pmd, 0)) {
@@ -461,7 +457,6 @@
}
pte = pte_save;
early_make_page_readonly(pte, XENFEAT_writable_page_tables);
- xen_pte_pin(pte_phys);
set_pmd(pmd, __pmd(pte_phys | _KERNPG_TABLE));
}
}
@@ -500,7 +495,6 @@
pmd = alloc_static_page(&pmd_phys);
early_make_page_readonly(pmd, XENFEAT_writable_page_tables);
- xen_pmd_pin(pmd_phys);
spin_lock(&init_mm.page_table_lock);
set_pud(pud, __pud(pmd_phys | _KERNPG_TABLE));
phys_pmd_init(pmd, paddr, end);
@@ -545,9 +539,6 @@
xen_pgd_pin(__pa_symbol(init_level4_pgt));
xen_pgd_pin(__pa_symbol(init_level4_user_pgt));
- xen_pud_pin(__pa_symbol(level3_kernel_pgt));
- xen_pud_pin(__pa_symbol(level3_user_pgt));
- xen_pmd_pin(__pa_symbol(level2_kernel_pgt));
set_pgd((pgd_t *)(init_level4_user_pgt + 511),
mk_kernel_pgd(__pa_symbol(level3_user_pgt)));
@@ -581,7 +572,6 @@
pte_page = alloc_static_page(&phys);
early_make_page_readonly(
pte_page, XENFEAT_writable_page_tables);
- xen_pte_pin(phys);
set_pmd(pmd, __pmd(phys | _KERNPG_TABLE | _PAGE_USER));
} else {
addr = page[pmd_index(va)];
@@ -662,7 +652,6 @@
pud = alloc_static_page(&pud_phys);
early_make_page_readonly(pud,
XENFEAT_writable_page_tables);
}
- xen_pud_pin(pud_phys);
next = start + PGDIR_SIZE;
if (next > end)
next = end;
@@ -943,7 +932,6 @@
ClearPageReserved(virt_to_page(addr));
set_page_count(virt_to_page(addr), 1);
memset((void *)(addr & ~(PAGE_SIZE-1)), 0xcc, PAGE_SIZE);
- xen_pte_unpin(__pa(addr));
make_page_writable(
__va(__pa(addr)), XENFEAT_writable_page_tables);
/*
diff -r 9aefef31e040 -r 57f21f67b532
linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/hypervisor.h
--- a/linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/hypervisor.h Sun Mar
12 18:37:00 2006
+++ b/linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/hypervisor.h Sun Mar
12 18:37:38 2006
@@ -79,12 +79,6 @@
void xen_l4_entry_update(pgd_t *ptr, pgd_t val); /* x86_64 only */
void xen_pgd_pin(unsigned long ptr);
void xen_pgd_unpin(unsigned long ptr);
-void xen_pud_pin(unsigned long ptr); /* x86_64 only */
-void xen_pud_unpin(unsigned long ptr); /* x86_64 only */
-void xen_pmd_pin(unsigned long ptr); /* x86_64 only */
-void xen_pmd_unpin(unsigned long ptr); /* x86_64 only */
-void xen_pte_pin(unsigned long ptr);
-void xen_pte_unpin(unsigned long ptr);
void xen_set_ldt(unsigned long ptr, unsigned long bytes);
void xen_machphys_update(unsigned long mfn, unsigned long pfn);
diff -r 9aefef31e040 -r 57f21f67b532
linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/pgalloc.h
--- a/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/pgalloc.h Sun Mar
12 18:37:00 2006
+++ b/linux-2.6-xen-sparse/include/asm-x86_64/mach-xen/asm/pgalloc.h Sun Mar
12 18:37:38 2006
@@ -181,7 +181,6 @@
static inline void pte_free_kernel(pte_t *pte)
{
BUG_ON((unsigned long)pte & (PAGE_SIZE-1));
- xen_pte_unpin(__pa(pte));
make_page_writable(pte, XENFEAT_writable_page_tables);
free_page((unsigned long)pte);
}
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