[Lguest] [PATCH] lguest: PAE support
Rusty Russell
rusty at rustcorp.com.au
Sun Jun 7 11:28:23 EST 2009
On Sat, 6 Jun 2009 01:39:02 am Matias Zabaljauregui wrote:
> Hi, this version requires that host and guest have the same PAE status.
> NX cap is not offered to the guest, yet.
Thanks, applied!
I extracted the following parts for moving into your previous "native ops"
patch:
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -519,7 +519,7 @@ static void lguest_pte_update(struct mm_
static void lguest_set_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pteval)
{
- *ptep = pteval;
+ native_set_pte(ptep, pteval);
lguest_pte_update(mm, addr, ptep);
}
@@ -528,9 +528,9 @@ static void lguest_set_pte_at(struct mm_
* changed. */
static void lguest_set_pmd(pmd_t *pmdp, pmd_t pmdval)
{
- *pmdp = pmdval;
+ native_set_pmd(pmdp, pmdval);
lazy_hcall2(LHCALL_SET_PMD, __pa(pmdp) & PAGE_MASK,
- (__pa(pmdp) & (PAGE_SIZE - 1)) / 4);
+ (__pa(pmdp) & (PAGE_SIZE - 1)) / sizeof(pmd_t));
}
/* There are a couple of legacy places where the kernel sets a PTE, but we
@@ -544,7 +544,7 @@ static void lguest_set_pmd(pmd_t *pmdp,
* which brings boot back to 0.25 seconds. */
static void lguest_set_pte(pte_t *ptep, pte_t pteval)
{
- *ptep = pteval;
+ native_set_pte(ptep, pteval);
if (cr3_changed)
lazy_hcall1(LHCALL_FLUSH_TLB, 1);
}
diff --git a/drivers/lguest/page_tables.c b/drivers/lguest/page_tables.c
--- a/drivers/lguest/page_tables.c
+++ b/drivers/lguest/page_tables.c
@@ -726,8 +726,9 @@ void map_switcher_in_guest(struct lg_cpu
* page is already mapped there, we don't have to copy them out
* again. */
pfn = __pa(cpu->regs_page) >> PAGE_SHIFT;
- regs_pte = pfn_pte(pfn, __pgprot(__PAGE_KERNEL));
- switcher_pte_page[(unsigned long)pages/PAGE_SIZE%PTRS_PER_PTE] = regs_pte;
+ native_set_pte(®s_pte, pfn_pte(pfn, PAGE_KERNEL));
+ native_set_pte(&switcher_pte_page[pte_index((unsigned long)pages)],
+ regs_pte);
}
/*:*/
More information about the Lguest
mailing list