This patch is for linux-2.6.18-xen.
- get the machine address of the vmcoreinfo area of xen
- expose the machine address and the size of the vmcoreinfo area
via /sys/hypervisor/vmcoreinfo so that the kexec-tools looks them.
Signed-off-by: Itsuro Oda <oda@xxxxxxxxxxxxx>
diff -r e01b3a133ddc drivers/xen/core/machine_kexec.c
--- a/drivers/xen/core/machine_kexec.c Wed Jun 11 09:28:01 2008 +0100
+++ b/drivers/xen/core/machine_kexec.c Thu Jun 12 13:10:40 2008 +0900
@@ -19,6 +19,9 @@ static struct resource xen_hypervisor_re
static struct resource xen_hypervisor_res;
static struct resource *xen_phys_cpus;
+size_t vmcoreinfo_size_xen;
+unsigned long paddr_vmcoreinfo_xen;
+
void __init xen_machine_kexec_setup_resources(void)
{
xen_kexec_range_t range;
@@ -94,6 +97,18 @@ void __init xen_machine_kexec_setup_reso
if (range.size) {
crashk_res.start = range.start;
crashk_res.end = range.start + range.size - 1;
+ }
+
+ /* get physical address of vmcoreinfo */
+ memset(&range, 0, sizeof(range));
+ range.range = KEXEC_RANGE_MA_VMCOREINFO;
+
+ if (HYPERVISOR_kexec_op(KEXEC_CMD_kexec_get_range, &range))
+ return;
+
+ if (range.size) {
+ paddr_vmcoreinfo_xen = range.start;
+ vmcoreinfo_size_xen = range.size;
}
if (machine_kexec_setup_resources(&xen_hypervisor_res, xen_phys_cpus,
diff -r e01b3a133ddc drivers/xen/core/xen_sysfs.c
--- a/drivers/xen/core/xen_sysfs.c Wed Jun 11 09:28:01 2008 +0100
+++ b/drivers/xen/core/xen_sysfs.c Thu Jun 12 13:39:04 2008 +0900
@@ -15,6 +15,7 @@
#include <xen/features.h>
#include <xen/hypervisor_sysfs.h>
#include <xen/xenbus.h>
+#include <xen/interface/kexec.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Mike D. Day <ncmike@xxxxxxxxxx>");
@@ -334,6 +335,24 @@ static void xen_properties_destroy(void)
&xen_properties_group);
}
+static ssize_t vmcoreinfo_show(struct hyp_sysfs_attr *attr, char *page)
+{
+ return sprintf(page, "%lx %zx\n",
+ paddr_vmcoreinfo_xen, vmcoreinfo_size_xen);
+}
+
+HYPERVISOR_ATTR_RO(vmcoreinfo);
+
+static int __init xen_sysfs_vmcoreinfo_init(void)
+{
+ return sysfs_create_file(&hypervisor_subsys.kset.kobj,
&vmcoreinfo_attr.attr);
+}
+
+static void xen_sysfs_vmcoreinfo_destroy(void)
+{
+ sysfs_remove_file(&hypervisor_subsys.kset.kobj, &vmcoreinfo_attr.attr);
+}
+
static int __init hyper_sysfs_init(void)
{
int ret;
@@ -354,9 +373,14 @@ static int __init hyper_sysfs_init(void)
if (ret)
goto uuid_out;
ret = xen_properties_init();
+ if (ret)
+ goto prop_out;
+ ret = xen_sysfs_vmcoreinfo_init();
if (!ret)
goto out;
+ xen_properties_destroy();
+prop_out:
xen_sysfs_uuid_destroy();
uuid_out:
xen_compilation_destroy();
@@ -370,6 +394,7 @@ out:
static void __exit hyper_sysfs_exit(void)
{
+ xen_sysfs_vmcoreinfo_destroy();
xen_properties_destroy();
xen_compilation_destroy();
xen_sysfs_uuid_destroy();
diff -r e01b3a133ddc include/xen/interface/kexec.h
--- a/include/xen/interface/kexec.h Wed Jun 11 09:28:01 2008 +0100
+++ b/include/xen/interface/kexec.h Thu Jun 12 13:11:44 2008 +0900
@@ -138,6 +138,10 @@ typedef struct xen_kexec_load {
* the ia64_boot_param */
#define KEXEC_RANGE_MA_EFI_MEMMAP 5 /* machine address and size of
* of the EFI Memory Map */
+#define KEXEC_RANGE_MA_VMCOREINFO 6 /* machine address and size of vmcoreinfo
*/
+
+extern size_t vmcoreinfo_size_xen;
+extern unsigned long paddr_vmcoreinfo_xen;
/*
* Find the address and size of certain memory areas
--
Itsuro ODA <oda@xxxxxxxxxxxxx>
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