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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] [xen-unstable] [IA64] Avoid dom0 insufficient memory panic when creating guests
# HG changeset patch
# User awilliam@xxxxxxxxxxxx
# Date 1169568483 25200
# Node ID 9576f09c9effb16bb0a99b8a4bbad6fe57dc9213
# Parent b3c79bad5de0d9c9e70559e0277a6b11948e5cf4
[IA64] Avoid dom0 insufficient memory panic when creating guests
When there is not enough memory to create a domain,
we need not panic domain0. Just prevent it from creating.
Signed-off-by: Zhang Xin <xing.z.zhang@xxxxxxxxx>
---
xen/arch/ia64/vmx/vmmu.c | 49 ++++++++++++++++++++++++++++++-------------
xen/arch/ia64/vmx/vmx_init.c | 7 ++++--
xen/arch/ia64/xen/domain.c | 8 ++++---
xen/include/asm-ia64/vmmu.h | 2 -
xen/include/asm-ia64/vmx.h | 2 -
5 files changed, 47 insertions(+), 21 deletions(-)
diff -r b3c79bad5de0 -r 9576f09c9eff xen/arch/ia64/vmx/vmmu.c
--- a/xen/arch/ia64/vmx/vmmu.c Tue Jan 23 08:48:39 2007 -0700
+++ b/xen/arch/ia64/vmx/vmmu.c Tue Jan 23 09:08:03 2007 -0700
@@ -129,13 +129,15 @@ purge_machine_tc_by_domid(domid_t domid)
#endif
}
-static void init_domain_vhpt(struct vcpu *v)
+static int init_domain_vhpt(struct vcpu *v)
{
struct page_info *page;
void * vbase;
page = alloc_domheap_pages (NULL, VCPU_VHPT_ORDER, 0);
if ( page == NULL ) {
- panic_domain(vcpu_regs(v),"No enough contiguous memory for
init_domain_vhpt\n");
+ printk("No enough contiguous memory for init_domain_vhpt\n");
+
+ return -1;
}
vbase = page_to_virt(page);
memset(vbase, 0, VCPU_VHPT_SIZE);
@@ -147,18 +149,36 @@ static void init_domain_vhpt(struct vcpu
VHPT(v,cch_sz) = VCPU_VHPT_SIZE - VHPT(v,hash_sz);
thash_init(&(v->arch.vhpt),VCPU_VHPT_SHIFT-1);
v->arch.arch_vmx.mpta = v->arch.vhpt.pta.val;
-}
-
-
-
-void init_domain_tlb(struct vcpu *v)
+
+ return 0;
+}
+
+
+static void free_domain_vhpt(struct vcpu *v)
+{
+ struct page_info *page;
+
+ if (v->arch.vhpt.hash) {
+ page = virt_to_page(v->arch.vhpt.hash);
+ free_domheap_pages(page, VCPU_VHPT_ORDER);
+ }
+
+ return;
+}
+
+int init_domain_tlb(struct vcpu *v)
{
struct page_info *page;
void * vbase;
- init_domain_vhpt(v);
+
+ if (init_domain_vhpt(v) != 0)
+ return -1;
+
page = alloc_domheap_pages (NULL, VCPU_VTLB_ORDER, 0);
if ( page == NULL ) {
- panic_domain(vcpu_regs(v),"No enough contiguous memory for
init_domain_tlb\n");
+ printk("No enough contiguous memory for init_domain_tlb\n");
+ free_domain_vhpt(v);
+ return -1;
}
vbase = page_to_virt(page);
memset(vbase, 0, VCPU_VTLB_SIZE);
@@ -169,7 +189,10 @@ void init_domain_tlb(struct vcpu *v)
VTLB(v,cch_buf) = (void *)((u64)vbase + VTLB(v,hash_sz));
VTLB(v,cch_sz) = VCPU_VTLB_SIZE - VTLB(v,hash_sz);
thash_init(&(v->arch.vtlb),VCPU_VTLB_SHIFT-1);
-}
+
+ return 0;
+}
+
void free_domain_tlb(struct vcpu *v)
{
@@ -179,10 +202,8 @@ void free_domain_tlb(struct vcpu *v)
page = virt_to_page(v->arch.vtlb.hash);
free_domheap_pages(page, VCPU_VTLB_ORDER);
}
- if ( v->arch.vhpt.hash) {
- page = virt_to_page(v->arch.vhpt.hash);
- free_domheap_pages(page, VCPU_VHPT_ORDER);
- }
+
+ free_domain_vhpt(v);
}
/*
diff -r b3c79bad5de0 -r 9576f09c9eff xen/arch/ia64/vmx/vmx_init.c
--- a/xen/arch/ia64/vmx/vmx_init.c Tue Jan 23 08:48:39 2007 -0700
+++ b/xen/arch/ia64/vmx/vmx_init.c Tue Jan 23 09:08:03 2007 -0700
@@ -290,7 +290,7 @@ static void vmx_release_assist_channel(s
* Initialize VMX envirenment for guest. Only the 1st vp/vcpu
* is registered here.
*/
-void
+int
vmx_final_setup_guest(struct vcpu *v)
{
vpd_t *vpd;
@@ -305,7 +305,8 @@ vmx_final_setup_guest(struct vcpu *v)
* to this solution. Maybe it can be deferred until we know created
* one as vmx domain */
#ifndef HASH_VHPT
- init_domain_tlb(v);
+ if (init_domain_tlb(v) != 0)
+ return -1;
#endif
vmx_create_event_channels(v);
@@ -322,6 +323,8 @@ vmx_final_setup_guest(struct vcpu *v)
/* Set up guest 's indicator for VTi domain*/
set_bit(ARCH_VMX_DOMAIN, &v->arch.arch_vmx.flags);
+
+ return 0;
}
void
diff -r b3c79bad5de0 -r 9576f09c9eff xen/arch/ia64/xen/domain.c
--- a/xen/arch/ia64/xen/domain.c Tue Jan 23 08:48:39 2007 -0700
+++ b/xen/arch/ia64/xen/domain.c Tue Jan 23 09:08:03 2007 -0700
@@ -585,9 +585,11 @@ int arch_set_info_guest(struct vcpu *v,
if (test_bit(_VCPUF_initialised, &v->vcpu_flags))
return 0;
- if (d->arch.is_vti)
- vmx_final_setup_guest(v);
- else {
+ if (d->arch.is_vti) {
+ rc = vmx_final_setup_guest(v);
+ if (rc != 0)
+ return rc;
+ } else {
rc = vcpu_late_initialise(v);
if (rc != 0)
return rc;
diff -r b3c79bad5de0 -r 9576f09c9eff xen/include/asm-ia64/vmmu.h
--- a/xen/include/asm-ia64/vmmu.h Tue Jan 23 08:48:39 2007 -0700
+++ b/xen/include/asm-ia64/vmmu.h Tue Jan 23 09:08:03 2007 -0700
@@ -295,7 +295,7 @@ extern void purge_machine_tc_by_domid(do
extern void purge_machine_tc_by_domid(domid_t domid);
extern void machine_tlb_insert(struct vcpu *d, thash_data_t *tlb);
extern ia64_rr vmmu_get_rr(struct vcpu *vcpu, u64 va);
-extern void init_domain_tlb(struct vcpu *d);
+extern int init_domain_tlb(struct vcpu *d);
extern void free_domain_tlb(struct vcpu *v);
extern thash_data_t * vsa_thash(PTA vpta, u64 va, u64 vrr, u64 *tag);
extern thash_data_t * vhpt_lookup(u64 va);
diff -r b3c79bad5de0 -r 9576f09c9eff xen/include/asm-ia64/vmx.h
--- a/xen/include/asm-ia64/vmx.h Tue Jan 23 08:48:39 2007 -0700
+++ b/xen/include/asm-ia64/vmx.h Tue Jan 23 09:08:03 2007 -0700
@@ -31,7 +31,7 @@ extern void identify_vmx_feature(void);
extern void identify_vmx_feature(void);
extern unsigned int vmx_enabled;
extern void vmx_init_env(void);
-extern void vmx_final_setup_guest(struct vcpu *v);
+extern int vmx_final_setup_guest(struct vcpu *v);
extern void vmx_save_state(struct vcpu *v);
extern void vmx_load_state(struct vcpu *v);
extern void vmx_setup_platform(struct domain *d);
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