[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH] Fix the P2M audit code
# HG changeset patch # User Steven Smith <steven.smith@xxxxxxxxxxxxx> # Date 1242731493 -3600 # Node ID 20b69e03fbd099226652fb9ba1540d5e93f35438 # Parent 780041c4a96d6bb4eb8bb4ed61c916c8c535448c Fix the P2M audit code. It currently doesn't even compile; with this patch applied, it compiles and didn't immediately explode as soon as I started a VM. I've not given it much testing beyond that, though. Signed-off-by: Steven Smith <steven.smith@xxxxxxxxxx> diff -r 780041c4a96d -r 20b69e03fbd0 xen/arch/x86/mm/p2m.c --- a/xen/arch/x86/mm/p2m.c Tue May 19 02:23:32 2009 +0100 +++ b/xen/arch/x86/mm/p2m.c Tue May 19 12:11:33 2009 +0100 @@ -1623,7 +1623,6 @@ #if P2M_AUDIT static void audit_p2m(struct domain *d) { - struct list_head *entry; struct page_info *page; struct domain *od; unsigned long mfn, gfn, m2pfn, lp2mfn = 0; @@ -1647,11 +1646,8 @@ /* Audit part one: walk the domain's page allocation list, checking * the m2p entries. */ - for ( entry = d->page_list.next; - entry != &d->page_list; - entry = entry->next ) + page_list_for_each ( page, &d->page_list ) { - page = list_entry(entry, struct page_info, list); mfn = mfn_x(page_to_mfn(page)); // P2M_PRINTK("auditing guest page, mfn=%#lx\n", mfn); @@ -1777,7 +1773,7 @@ { pmbad++; P2M_PRINTK("mismatch: gfn %#lx -> mfn %#lx" - " -> gfn %#lx\n", gfn+i, mfn+i, + " -> gfn %#lx\n", gfn+i1, mfn+i1, m2pfn); BUG(); } @@ -1800,7 +1796,8 @@ mfn = l1e_get_pfn(l1e[i1]); ASSERT(mfn_valid(_mfn(mfn))); m2pfn = get_gpfn_from_mfn(mfn); - if ( m2pfn != gfn ) + if ( m2pfn != gfn && + p2m_flags_to_type(l1e_get_flags(l1e[i1])) != p2m_mmio_direct ) { pmbad++; printk("mismatch: gfn %#lx -> mfn %#lx" @@ -1924,7 +1921,7 @@ p2m_lock(p2md); audit_p2m(d); - P2M_DEBUG("adding gfn=%#lx mfn=%#lx\n", gfn, mfn); + P2M_DEBUG("mark pod gfn=%#lx\n", gfn); /* Make sure all gpfns are unused */ for ( i = 0; i < (1UL << order); i++ ) @@ -2212,6 +2209,7 @@ set_gpfn_from_mfn(mfn_x(omfn), INVALID_M2P_ENTRY); } + P2M_DEBUG("set mmio %lx %lx\n", gfn, mfn_x(mfn)); rc = set_p2m_entry(d, gfn, mfn, 0, p2m_mmio_direct); if ( 0 == rc ) gdprintk(XENLOG_ERR, _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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