# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1211889785 -3600
# Node ID c93a913c221f19d2eea96d9cf9f98d9e10a078ea
# Parent 6b28a18a8c2d22993adbf35fa66712661118dede
minios: We do not need to pin the page tables, as they implicitly get
pinned when we point the permanent page directory to them.
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
---
extras/mini-os/arch/x86/mm.c | 17 ++---------------
1 files changed, 2 insertions(+), 15 deletions(-)
diff -r 6b28a18a8c2d -r c93a913c221f extras/mini-os/arch/x86/mm.c
--- a/extras/mini-os/arch/x86/mm.c Tue May 27 11:51:33 2008 +0100
+++ b/extras/mini-os/arch/x86/mm.c Tue May 27 13:03:05 2008 +0100
@@ -59,11 +59,10 @@ void new_pt_frame(unsigned long *pt_pfn,
{
pgentry_t *tab = (pgentry_t *)start_info.pt_base;
unsigned long pt_page = (unsigned long)pfn_to_virt(*pt_pfn);
- unsigned long prot_e, prot_t, pincmd;
+ unsigned long prot_e, prot_t;
mmu_update_t mmu_updates[1];
- struct mmuext_op pin_request;
- prot_e = prot_t = pincmd = 0;
+ prot_e = prot_t = 0;
DEBUG("Allocating new L%d pt frame for pt_pfn=%lx, "
"prev_l_mfn=%lx, offset=%lx",
level, *pt_pfn, prev_l_mfn, offset);
@@ -77,18 +76,15 @@ void new_pt_frame(unsigned long *pt_pfn,
case L1_FRAME:
prot_e = L1_PROT;
prot_t = L2_PROT;
- pincmd = MMUEXT_PIN_L1_TABLE;
break;
case L2_FRAME:
prot_e = L2_PROT;
prot_t = L3_PROT;
- pincmd = MMUEXT_PIN_L2_TABLE;
break;
#if defined(__x86_64__)
case L3_FRAME:
prot_e = L3_PROT;
prot_t = L4_PROT;
- pincmd = MMUEXT_PIN_L3_TABLE;
break;
#endif
default:
@@ -113,15 +109,6 @@ void new_pt_frame(unsigned long *pt_pfn,
do_exit();
}
- /* Pin the page to provide correct protection */
- pin_request.cmd = pincmd;
- pin_request.arg1.mfn = pfn_to_mfn(*pt_pfn);
- if(HYPERVISOR_mmuext_op(&pin_request, 1, NULL, DOMID_SELF) < 0)
- {
- printk("ERROR: pinning failed\n");
- do_exit();
- }
-
/* Now fill the new page table page with entries.
Update the page directory as well. */
mmu_updates[0].ptr = ((pgentry_t)prev_l_mfn << PAGE_SHIFT) +
sizeof(pgentry_t) * offset;
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