# HG changeset patch
# User yamahata@xxxxxxxxxxxxx
# Date 1188180576 -32400
# Node ID 370225277691127a02ca35ebebf29241263ca707
# Parent 6644d848626685f01d6832837fdb4ab2e06fffde
some fix of 4k page support.
Some portion of code is depend on PAGE_SIZE and shouldn't be changed.
PATCHNAME: fix_4k_page_support
Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
diff -r 6644d8486266 -r 370225277691 xen/arch/ia64/xen/faults.c
--- a/xen/arch/ia64/xen/faults.c Fri Aug 24 15:09:14 2007 -0600
+++ b/xen/arch/ia64/xen/faults.c Mon Aug 27 11:09:36 2007 +0900
@@ -729,6 +729,17 @@ ia64_shadow_fault(unsigned long ifa, uns
unsigned long pte = 0;
struct vhpt_lf_entry *vlfe;
+ /*
+ * v->arch.vhpt_pg_shift shouldn't be used here.
+ * Currently diryt page logging bitmap is allocated based
+ * on PAGE_SIZE. This is part of xen_domctl_shadow_op ABI.
+ * If we want to log dirty pages in finer grained when
+ * v->arch.vhpt_pg_shift < PAGE_SHIFT, we have to
+ * revise the ABI and update this function and the related
+ * tool stack (live relocation).
+ */
+ unsigned long vhpt_pg_shift = PAGE_SHIFT;
+
/* There are 2 jobs to do:
- marking the page as dirty (the metaphysical address must be
extracted to do that).
@@ -744,7 +755,7 @@ ia64_shadow_fault(unsigned long ifa, uns
if (vlfe->ti_tag == ia64_ttag(ifa)) {
/* The VHPT entry is valid. */
gpfn = get_gpfn_from_mfn((pte & _PAGE_PPN_MASK) >>
- v->arch.vhpt_pg_shift);
+ vhpt_pg_shift);
BUG_ON(gpfn == INVALID_M2P_ENTRY);
} else {
unsigned long itir, iha;
@@ -760,10 +771,10 @@ ia64_shadow_fault(unsigned long ifa, uns
/* Try again! */
if (fault != IA64_NO_FAULT) {
/* This will trigger a dtlb miss. */
- ia64_ptcl(ifa, v->arch.vhpt_pg_shift << 2);
- return;
- }
- gpfn = ((pte & _PAGE_PPN_MASK) >> v->arch.vhpt_pg_shift);
+ ia64_ptcl(ifa, vhpt_pg_shift << 2);
+ return;
+ }
+ gpfn = ((pte & _PAGE_PPN_MASK) >> vhpt_pg_shift);
if (pte & _PAGE_D)
pte |= _PAGE_VIRT_D;
}
@@ -791,7 +802,7 @@ ia64_shadow_fault(unsigned long ifa, uns
/* Purge the TC locally.
It will be reloaded from the VHPT iff the
VHPT entry is still valid. */
- ia64_ptcl(ifa, v->arch.vhpt_pg_shift << 2);
+ ia64_ptcl(ifa, vhpt_pg_shift << 2);
atomic64_inc(&d->arch.shadow_fault_count);
} else {
@@ -803,6 +814,6 @@ ia64_shadow_fault(unsigned long ifa, uns
/* We don't know wether or not the fault must be
reflected. The VHPT entry is not valid. */
/* FIXME: in metaphysical mode, we could do an ITC now. */
- ia64_ptcl(ifa, v->arch.vhpt_pg_shift << 2);
- }
-}
+ ia64_ptcl(ifa, vhpt_pg_shift << 2);
+ }
+}
diff -r 6644d8486266 -r 370225277691 xen/arch/ia64/xen/vhpt.c
--- a/xen/arch/ia64/xen/vhpt.c Fri Aug 24 15:09:14 2007 -0600
+++ b/xen/arch/ia64/xen/vhpt.c Mon Aug 27 11:09:36 2007 +0900
@@ -384,7 +384,12 @@ __domain_flush_vtlb_track_entry(struct d
int cpu;
int vcpu;
int local_purge = 1;
- unsigned char ps = current->arch.vhpt_pg_shift;
+
+ /* tlb inert tracking is done in PAGE_SIZE uint. */
+ unsigned char ps = max_t(unsigned char,
+ current->arch.vhpt_pg_shift, PAGE_SHIFT);
+ /* This case isn't supported (yet). */
+ BUG_ON(current->arch.vhpt_pg_shift > PAGE_SHIFT);
BUG_ON((vaddr >> VRN_SHIFT) != VRN7);
/*
--
yamahata
15763_370225277691_fix_4k_page_support.patch
Description: Text Data
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