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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] hvm: Take care when checking ->is_compat flag now that HVM as well as
# HG changeset patch
# User kfraser@xxxxxxxxxxxxxxxxxxxxx
# Date 1177608814 -3600
# Node ID f18e1ca693801d1893fff16cb5ad3aca5398c47e
# Parent 39383ac1aec82d0a421e0fbbb7bc9adc09e2703a
hvm: Take care when checking ->is_compat flag now that HVM as well as
PV guests can assert it.
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
---
xen/arch/x86/domain.c | 40 ++++++++++++++++------------------------
xen/arch/x86/mm/shadow/multi.c | 6 +++---
xen/include/asm-x86/domain.h | 13 +++++++++++++
xen/include/asm-x86/shadow.h | 10 ----------
4 files changed, 32 insertions(+), 37 deletions(-)
diff -r 39383ac1aec8 -r f18e1ca69380 xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c Thu Apr 26 17:30:56 2007 +0100
+++ b/xen/arch/x86/domain.c Thu Apr 26 18:33:34 2007 +0100
@@ -237,7 +237,8 @@ static int setup_compat_l4(struct vcpu *
l4tab[l4_table_offset(LINEAR_PT_VIRT_START)] =
l4e_from_page(pg, __PAGE_HYPERVISOR);
l4tab[l4_table_offset(PERDOMAIN_VIRT_START)] =
- l4e_from_paddr(__pa(v->domain->arch.mm_perdomain_l3),
__PAGE_HYPERVISOR);
+ 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;
@@ -259,7 +260,7 @@ static void release_compat_l4(struct vcp
static inline int may_switch_mode(struct domain *d)
{
- return (d->tot_pages == 0);
+ return (!is_hvm_domain(d) && (d->tot_pages == 0));
}
int switch_native(struct domain *d)
@@ -371,15 +372,12 @@ int vcpu_initialise(struct vcpu *v)
v->arch.perdomain_ptes =
d->arch.mm_perdomain_pt + (v->vcpu_id << GDT_LDT_VCPU_SHIFT);
- if ( IS_COMPAT(d) && (rc = setup_compat_l4(v)) != 0 )
- return rc;
-
- return 0;
+ return (pv_32on64_vcpu(v) ? setup_compat_l4(v) : 0);
}
void vcpu_destroy(struct vcpu *v)
{
- if ( IS_COMPAT(v->domain) )
+ if ( pv_32on64_vcpu(v) )
release_compat_l4(v);
}
@@ -491,7 +489,7 @@ void arch_domain_destroy(struct domain *
free_domheap_page(virt_to_page(d->arch.mm_perdomain_l3));
#endif
- if ( IS_COMPAT(d) )
+ if ( pv_32on64_domain(d) )
release_arg_xlat_area(d);
free_xenheap_page(d->shared_info);
@@ -508,7 +506,7 @@ int arch_set_info_guest(
/* The context is a compat-mode one if the target domain is compat-mode;
* we expect the tools to DTRT even in compat-mode callers. */
- compat = IS_COMPAT(d);
+ compat = pv_32on64_domain(d);
#ifdef CONFIG_COMPAT
#define c(fld) (compat ? (c.cmp->fld) : (c.nat->fld))
@@ -1268,7 +1266,7 @@ unsigned long hypercall_create_continuat
else
#endif
{
- if ( supervisor_mode_kernel || is_hvm_vcpu(current) )
+ if ( supervisor_mode_kernel )
regs->eip &= ~31; /* re-execute entire hypercall entry stub */
for ( i = 0; *p != '\0'; i++ )
@@ -1449,14 +1447,11 @@ static void vcpu_destroy_pagetables(stru
struct domain *d = v->domain;
unsigned long pfn;
-#ifdef CONFIG_COMPAT
- if ( IS_COMPAT(d) )
- {
- if ( is_hvm_vcpu(v) )
- pfn = pagetable_get_pfn(v->arch.guest_table);
- else
- pfn = l4e_get_pfn(*(l4_pgentry_t *)
- __va(pagetable_get_paddr(v->arch.guest_table)));
+#ifdef __x86_64__
+ if ( pv_32on64_vcpu(v) )
+ {
+ pfn = l4e_get_pfn(*(l4_pgentry_t *)
+ __va(pagetable_get_paddr(v->arch.guest_table)));
if ( pfn != 0 )
{
@@ -1466,12 +1461,9 @@ static void vcpu_destroy_pagetables(stru
put_page_and_type(mfn_to_page(pfn));
}
- if ( is_hvm_vcpu(v) )
- v->arch.guest_table = pagetable_null();
- else
- l4e_write(
- (l4_pgentry_t *)
__va(pagetable_get_paddr(v->arch.guest_table)),
- l4e_empty());
+ l4e_write(
+ (l4_pgentry_t *)__va(pagetable_get_paddr(v->arch.guest_table)),
+ l4e_empty());
v->arch.cr3 = 0;
return;
diff -r 39383ac1aec8 -r f18e1ca69380 xen/arch/x86/mm/shadow/multi.c
--- a/xen/arch/x86/mm/shadow/multi.c Thu Apr 26 17:30:56 2007 +0100
+++ b/xen/arch/x86/mm/shadow/multi.c Thu Apr 26 18:33:34 2007 +0100
@@ -1437,7 +1437,7 @@ static void sh_install_xen_entries_in_l2
int i;
#else
- if ( !pv_32bit_guest(v) )
+ if ( !pv_32bit_vcpu(v) )
return;
#endif
@@ -1685,7 +1685,7 @@ sh_make_monitor_table(struct vcpu *v)
l4e = sh_map_domain_page(m4mfn);
l4e[0] = l4e_from_pfn(mfn_x(m3mfn), __PAGE_HYPERVISOR);
sh_unmap_domain_page(l4e);
- if ( pv_32bit_guest(v) )
+ if ( pv_32bit_vcpu(v) )
{
// Install a monitor l2 table in slot 3 of the l3 table.
// This is used for all Xen entries.
@@ -2111,7 +2111,7 @@ void sh_destroy_monitor_table(struct vcp
l4_pgentry_t *l4e = sh_map_domain_page(mmfn);
ASSERT(l4e_get_flags(l4e[0]) & _PAGE_PRESENT);
m3mfn = _mfn(l4e_get_pfn(l4e[0]));
- if ( pv_32bit_guest(v) )
+ if ( pv_32bit_vcpu(v) )
{
/* Need to destroy the l2 monitor page in slot 3 too */
l3_pgentry_t *l3e = sh_map_domain_page(m3mfn);
diff -r 39383ac1aec8 -r f18e1ca69380 xen/include/asm-x86/domain.h
--- a/xen/include/asm-x86/domain.h Thu Apr 26 17:30:56 2007 +0100
+++ b/xen/include/asm-x86/domain.h Thu Apr 26 18:33:34 2007 +0100
@@ -6,6 +6,19 @@
#include <asm/hvm/vcpu.h>
#include <asm/hvm/domain.h>
#include <asm/e820.h>
+
+#ifdef __x86_64__
+#define pv_32bit_vcpu(v) (!is_hvm_vcpu(v) && IS_COMPAT((v)->domain))
+#define pv_32bit_domain(d) (!is_hvm_domain(d) && IS_COMPAT(d))
+#define pv_32on64_vcpu(v) (pv_32bit_vcpu(v))
+#define pv_32on64_domain(d) (pv_32bit_domain(d))
+#else
+#define pv_32bit_vcpu(v) (!is_hvm_vcpu(v))
+#define pv_32bit_domain(d) (!is_hvm_domain(d))
+#define pv_32on64_vcpu(v) (0)
+#define pv_32on64_domain(d) (0)
+#endif
+
struct trap_bounce {
uint32_t error_code;
diff -r 39383ac1aec8 -r f18e1ca69380 xen/include/asm-x86/shadow.h
--- a/xen/include/asm-x86/shadow.h Thu Apr 26 17:30:56 2007 +0100
+++ b/xen/include/asm-x86/shadow.h Thu Apr 26 18:33:34 2007 +0100
@@ -48,16 +48,6 @@
* not yet supported */
#define shadow_mode_trap_reads(_d) ({ (void)(_d); 0; })
-/*
- * 32on64 support
- */
-#ifdef __x86_64__
-#define pv_32bit_guest(_v) (!is_hvm_vcpu(_v) && IS_COMPAT((_v)->domain))
-#else
-#define pv_32bit_guest(_v) (!is_hvm_vcpu(_v))
-#endif
-
-
/*****************************************************************************
* Entry points into the shadow code */
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