[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [HVM] Ensure the read-only M2P table is mapped without _PAGE_GLOBAL
# HG changeset patch # User kfraser@xxxxxxxxxxxxxxxxxxxxx # Node ID f437295526037a468bbd2659935ab7935262a99e # Parent b26bf72514aa793453d426ccdf888f577c6efd91 [HVM] Ensure the read-only M2P table is mapped without _PAGE_GLOBAL otherwise context switch to shadow-mode-translate guests does not work properly (they reuse that area of virtual address space). Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx> --- xen/arch/x86/x86_32/mm.c | 1 + xen/arch/x86/x86_64/mm.c | 3 ++- 2 files changed, 3 insertions(+), 1 deletion(-) diff -r b26bf72514aa -r f43729552603 xen/arch/x86/x86_32/mm.c --- a/xen/arch/x86/x86_32/mm.c Tue Aug 15 16:17:24 2006 +0100 +++ b/xen/arch/x86/x86_32/mm.c Tue Aug 15 16:21:12 2006 +0100 @@ -104,6 +104,7 @@ void __init paging_init(void) panic("Not enough memory to bootstrap Xen.\n"); idle_pg_table_l2[l2_linear_offset(RDWR_MPT_VIRT_START) + i] = l2e_from_page(pg, PAGE_HYPERVISOR | _PAGE_PSE); + /* NB. Cannot be GLOBAL as shadow_mode_translate reuses this area. */ idle_pg_table_l2[l2_linear_offset(RO_MPT_VIRT_START) + i] = l2e_from_page(pg, (__PAGE_HYPERVISOR | _PAGE_PSE) & ~_PAGE_RW); } diff -r b26bf72514aa -r f43729552603 xen/arch/x86/x86_64/mm.c --- a/xen/arch/x86/x86_64/mm.c Tue Aug 15 16:17:24 2006 +0100 +++ b/xen/arch/x86/x86_64/mm.c Tue Aug 15 16:21:12 2006 +0100 @@ -113,8 +113,9 @@ void __init paging_init(void) PAGE_HYPERVISOR); memset((void *)(RDWR_MPT_VIRT_START + (i << L2_PAGETABLE_SHIFT)), 0x55, 1UL << L2_PAGETABLE_SHIFT); + /* NB. Cannot be GLOBAL as shadow_mode_translate reuses this area. */ *l2_ro_mpt++ = l2e_from_page( - pg, _PAGE_GLOBAL|_PAGE_PSE|_PAGE_USER|_PAGE_PRESENT); + pg, /*_PAGE_GLOBAL|*/_PAGE_PSE|_PAGE_USER|_PAGE_PRESENT); BUG_ON(((unsigned long)l2_ro_mpt & ~PAGE_MASK) == 0); } _______________________________________________ Xen-changelog mailing list Xen-changelog@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-changelog
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