77 lines
2.6 KiB
Diff
77 lines
2.6 KiB
Diff
|
# HG changeset 15390 patch
|
||
|
|
# User kfraser@localhost.localdomain
|
||
|
|
# Date 1182343128 -3600
|
||
|
|
# Node ID 69658f935cc737c46d33404ccb5e9aff9842e5cb
|
||
|
|
# Parent 07be0266f6d88f2a8343b54f36301f3adac88d18
|
||
|
|
32-on-64: Fix error path where we fail to successfully switch a guest
|
||
|
|
into compat mode.
|
||
|
|
Signed-off-by: Keir Fraser <keir@xensource.com>
|
||
|
|
|
||
|
|
Index: 2007-05-14/xen/arch/x86/domain.c
|
||
|
|
===================================================================
|
||
|
|
--- 2007-05-14.orig/xen/arch/x86/domain.c 2007-07-02 10:47:47.000000000 +0200
|
||
|
|
+++ 2007-05-14/xen/arch/x86/domain.c 2007-07-02 10:48:10.000000000 +0200
|
||
|
|
@@ -227,7 +227,7 @@ static int setup_compat_l4(struct vcpu *
|
||
|
|
l4_pgentry_t *l4tab;
|
||
|
|
int rc;
|
||
|
|
|
||
|
|
- if ( !pg )
|
||
|
|
+ if ( pg == NULL )
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
/* This page needs to look like a pagetable so that it can be shadowed */
|
||
|
|
@@ -239,8 +239,6 @@ static int setup_compat_l4(struct vcpu *
|
||
|
|
l4tab[l4_table_offset(PERDOMAIN_VIRT_START)] =
|
||
|
|
l4e_from_paddr(__pa(v->domain->arch.mm_perdomain_l3),
|
||
|
|
__PAGE_HYPERVISOR);
|
||
|
|
- v->arch.guest_table = pagetable_from_page(pg);
|
||
|
|
- v->arch.guest_table_user = v->arch.guest_table;
|
||
|
|
|
||
|
|
if ( (rc = setup_arg_xlat_area(v, l4tab)) < 0 )
|
||
|
|
{
|
||
|
|
@@ -248,6 +246,9 @@ static int setup_compat_l4(struct vcpu *
|
||
|
|
return rc;
|
||
|
|
}
|
||
|
|
|
||
|
|
+ v->arch.guest_table = pagetable_from_page(pg);
|
||
|
|
+ v->arch.guest_table_user = v->arch.guest_table;
|
||
|
|
+
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
@@ -313,11 +314,11 @@ int switch_compat(struct domain *d)
|
||
|
|
gdt_l1e = l1e_from_page(virt_to_page(compat_gdt_table), PAGE_HYPERVISOR);
|
||
|
|
for ( vcpuid = 0; vcpuid < MAX_VIRT_CPUS; vcpuid++ )
|
||
|
|
{
|
||
|
|
+ if ( (d->vcpu[vcpuid] != NULL) &&
|
||
|
|
+ (setup_compat_l4(d->vcpu[vcpuid]) != 0) )
|
||
|
|
+ goto undo_and_fail;
|
||
|
|
d->arch.mm_perdomain_pt[((vcpuid << GDT_LDT_VCPU_SHIFT) +
|
||
|
|
FIRST_RESERVED_GDT_PAGE)] = gdt_l1e;
|
||
|
|
- if (d->vcpu[vcpuid]
|
||
|
|
- && setup_compat_l4(d->vcpu[vcpuid]) != 0)
|
||
|
|
- return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
d->arch.physaddr_bitsize =
|
||
|
|
@@ -325,6 +326,19 @@ int switch_compat(struct domain *d)
|
||
|
|
+ (PAGE_SIZE - 2);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
+
|
||
|
|
+ undo_and_fail:
|
||
|
|
+ d->arch.is_32bit_pv = d->arch.has_32bit_shinfo = 0;
|
||
|
|
+ release_arg_xlat_area(d);
|
||
|
|
+ gdt_l1e = l1e_from_page(virt_to_page(gdt_table), PAGE_HYPERVISOR);
|
||
|
|
+ while ( vcpuid-- != 0 )
|
||
|
|
+ {
|
||
|
|
+ if ( d->vcpu[vcpuid] != NULL )
|
||
|
|
+ release_compat_l4(d->vcpu[vcpuid]);
|
||
|
|
+ d->arch.mm_perdomain_pt[((vcpuid << GDT_LDT_VCPU_SHIFT) +
|
||
|
|
+ FIRST_RESERVED_GDT_PAGE)] = gdt_l1e;
|
||
|
|
+ }
|
||
|
|
+ return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
#else
|