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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [Patch 7] Xen/MCE: Abort live migration when vMCE occur
Xen/MCE: Abort live migration when vMCE occur
This patch monitor the critical area of live migration (from vMCE point of view,
the copypages stage of migration is the critical area while other areas are
not).
If a vMCE occur at the critical area of live migration, abort and try migration
later.
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
diff -r 8869ba37b577 tools/libxc/xc_domain.c
--- a/tools/libxc/xc_domain.c Thu Jul 19 22:14:08 2012 +0800
+++ b/tools/libxc/xc_domain.c Thu Jul 26 22:52:09 2012 +0800
@@ -283,6 +283,37 @@
return ret;
}
+/* Start vmce monitor */
+int xc_domain_vmce_monitor_strat(xc_interface *xch,
+ uint32_t domid)
+{
+ int ret;
+ DECLARE_DOMCTL;
+
+ domctl.cmd = XEN_DOMCTL_vmce_monitor_start;
+ domctl.domain = (domid_t)domid;
+ ret = do_domctl(xch, &domctl);
+
+ return ret ? -1 : 0;
+}
+
+/* End vmce monitor */
+int xc_domain_vmce_monitor_end(xc_interface *xch,
+ uint32_t domid,
+ int *vmce_while_migrate)
+{
+ int ret;
+ DECLARE_DOMCTL;
+
+ domctl.cmd = XEN_DOMCTL_vmce_monitor_end;
+ domctl.domain = (domid_t)domid;
+ ret = do_domctl(xch, &domctl);
+ if ( !ret )
+ *vmce_while_migrate = domctl.u.vmce_monitor.vmce_while_migrate;
+
+ return ret ? -1 : 0;
+}
+
/* get info from hvm guest for save */
int xc_domain_hvm_getcontext(xc_interface *xch,
uint32_t domid,
diff -r 8869ba37b577 tools/libxc/xc_domain_save.c
--- a/tools/libxc/xc_domain_save.c Thu Jul 19 22:14:08 2012 +0800
+++ b/tools/libxc/xc_domain_save.c Thu Jul 26 22:52:09 2012 +0800
@@ -895,6 +895,8 @@
*/
int compressing = 0;
+ int vmce_while_migrate = 0;
+
int completed = 0;
if ( hvm && !callbacks->switch_qemu_logdirty )
@@ -1109,6 +1111,12 @@
goto out;
}
+ if ( xc_domain_vmce_monitor_strat(xch, dom) )
+ {
+ PERROR("Error when start vmce monitor\n");
+ goto out;
+ }
+
copypages:
#define wrexact(fd, buf, len) write_buffer(xch, last_iter, ob, (fd), (buf),
(len))
#define wruncached(fd, live, buf, len) write_uncached(xch, last_iter, ob,
(fd), (buf), (len))
@@ -1571,6 +1579,17 @@
DPRINTF("All memory is saved\n");
+ if ( xc_domain_vmce_monitor_end(xch, dom, &vmce_while_migrate) )
+ {
+ PERROR("Error when end vmce monitor\n");
+ goto out;
+ }
+ else if ( vmce_while_migrate )
+ {
+ fprintf(stderr, "vMCE occurred, abort this time and try later.\n");
+ goto out;
+ }
+
/* After last_iter, buffer the rest of pagebuf & tailbuf data into a
* separate output buffer and flush it after the compressed page chunks.
*/
diff -r 8869ba37b577 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h Thu Jul 19 22:14:08 2012 +0800
+++ b/tools/libxc/xenctrl.h Thu Jul 26 22:52:09 2012 +0800
@@ -568,6 +568,26 @@
xc_domaininfo_t *info);
/**
+ * This function start monitor vmce event.
+ * @parm xch a handle to an open hypervisor interface
+ * @parm domid the domain id monitored
+ * @return 0 on success, -1 on failure
+ */
+int xc_domain_vmce_monitor_strat(xc_interface *xch,
+ uint32_t domid);
+
+/**
+ * This function end monitor vmce event
+ * @parm xch a handle to an open hypervisor interface
+ * @parm domid the domain id monitored
+ * @parm vmce_while_migrate a pointer return whether vMCE occur when migrate
+ * @return 0 on success, -1 on failure
+ */
+int xc_domain_vmce_monitor_end(xc_interface *xch,
+ uint32_t domid,
+ int *vmce_while_migrate);
+
+/**
* This function returns information about the context of a hvm domain
* @parm xch a handle to an open hypervisor interface
* @parm domid the domain to get information from
diff -r 8869ba37b577 xen/arch/x86/cpu/mcheck/mce_intel.c
--- a/xen/arch/x86/cpu/mcheck/mce_intel.c Thu Jul 19 22:14:08 2012 +0800
+++ b/xen/arch/x86/cpu/mcheck/mce_intel.c Thu Jul 26 22:52:09 2012 +0800
@@ -688,6 +688,12 @@
goto vmce_failed;
}
+ if ( unlikely(d->arch.vmce_monitor) )
+ {
+ /* vMCE occur when guest migration */
+ d->arch.vmce_while_migrate = 1;
+ }
+
/* We will inject vMCE to DOMU*/
if ( inject_vmce(d) < 0 )
{
diff -r 8869ba37b577 xen/arch/x86/domctl.c
--- a/xen/arch/x86/domctl.c Thu Jul 19 22:14:08 2012 +0800
+++ b/xen/arch/x86/domctl.c Thu Jul 26 22:52:09 2012 +0800
@@ -1517,6 +1517,41 @@
}
break;
+ case XEN_DOMCTL_vmce_monitor_start:
+ {
+ struct domain *d;
+
+ d = rcu_lock_domain_by_id(domctl->domain);
+ if ( d != NULL )
+ {
+ d->arch.vmce_while_migrate = 0;
+ d->arch.vmce_monitor = 1;
+ rcu_unlock_domain(d);
+ }
+ else
+ ret = -ESRCH;
+ }
+ break;
+
+ case XEN_DOMCTL_vmce_monitor_end:
+ {
+ struct domain *d;
+
+ d = rcu_lock_domain_by_id(domctl->domain);
+ if ( d != NULL)
+ {
+ d->arch.vmce_monitor = 0;
+ domctl->u.vmce_monitor.vmce_while_migrate =
+ d->arch.vmce_while_migrate;
+ rcu_unlock_domain(d);
+ if ( copy_to_guest(u_domctl, domctl, 1) )
+ ret = -EFAULT;
+ }
+ else
+ ret = -ESRCH;
+ }
+ break;
+
default:
ret = iommu_do_domctl(domctl, u_domctl);
break;
diff -r 8869ba37b577 xen/include/asm-x86/domain.h
--- a/xen/include/asm-x86/domain.h Thu Jul 19 22:14:08 2012 +0800
+++ b/xen/include/asm-x86/domain.h Thu Jul 26 22:52:09 2012 +0800
@@ -292,6 +292,10 @@
bool_t has_32bit_shinfo;
/* Domain cannot handle spurious page faults? */
bool_t suppress_spurious_page_faults;
+ /* Monitoring guest memory copy of migration */
+ bool_t vmce_monitor;
+ /* Whether vMCE occur during guest memory copy of migration */
+ bool_t vmce_while_migrate;
/* Continuable domain_relinquish_resources(). */
enum {
diff -r 8869ba37b577 xen/include/public/domctl.h
--- a/xen/include/public/domctl.h Thu Jul 19 22:14:08 2012 +0800
+++ b/xen/include/public/domctl.h Thu Jul 26 22:52:09 2012 +0800
@@ -850,6 +850,12 @@
typedef struct xen_domctl_set_access_required xen_domctl_set_access_required_t;
DEFINE_XEN_GUEST_HANDLE(xen_domctl_set_access_required_t);
+struct xen_domctl_vmce_monitor {
+ uint8_t vmce_while_migrate;
+};
+typedef struct xen_domctl_vmce_monitor xen_domctl_vmce_monitor_t;
+DEFINE_XEN_GUEST_HANDLE(xen_domctl_vmce_monitor_t);
+
struct xen_domctl {
uint32_t cmd;
#define XEN_DOMCTL_createdomain 1
@@ -915,6 +921,8 @@
#define XEN_DOMCTL_set_access_required 64
#define XEN_DOMCTL_audit_p2m 65
#define XEN_DOMCTL_set_virq_handler 66
+#define XEN_DOMCTL_vmce_monitor_start 67
+#define XEN_DOMCTL_vmce_monitor_end 68
#define XEN_DOMCTL_gdbsx_guestmemio 1000
#define XEN_DOMCTL_gdbsx_pausevcpu 1001
#define XEN_DOMCTL_gdbsx_unpausevcpu 1002
@@ -970,6 +978,7 @@
struct xen_domctl_set_access_required access_required;
struct xen_domctl_audit_p2m audit_p2m;
struct xen_domctl_set_virq_handler set_virq_handler;
+ struct xen_domctl_vmce_monitor vmce_monitor;
struct xen_domctl_gdbsx_memio gdbsx_guest_memio;
struct xen_domctl_gdbsx_pauseunp_vcpu gdbsx_pauseunp_vcpu;
struct xen_domctl_gdbsx_domstatus gdbsx_domstatus;Attachment:
7_vmce_when_migrate.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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