1 files changed, 93 insertions, 33 deletions

diff --git a/kexec/crashdump-xen.c b/kexec/crashdump-xen.c
index d8bd0f4..60594f6 100644
--- a/kexec/crashdump-xen.c
+++ b/kexec/crashdump-xen.c
@@ -131,30 +131,18 @@ unsigned long xen_architecture(struct crash_elf_info *elf_info)
 #ifdef HAVE_LIBXENCTRL
 	int rc;
 	xen_capabilities_info_t capabilities;
-#ifdef XENCTRL_HAS_XC_INTERFACE
 	xc_interface *xc;
-#else
-	int xc;
-#endif
 
 	if (!xen_present())
 		goto out;
 
 	memset(capabilities, '0', XEN_CAPABILITIES_INFO_LEN);
 
-#ifdef XENCTRL_HAS_XC_INTERFACE
 	xc = xc_interface_open(NULL, NULL, 0);
 	if ( !xc ) {
 		fprintf(stderr, "failed to open xen control interface.\n");
 		goto out;
 	}
-#else
-	xc = xc_interface_open();
-	if ( xc == -1 ) {
-		fprintf(stderr, "failed to open xen control interface.\n");
-		goto out;
-	}
-#endif
 
 	rc = xc_version(xc, XENVER_capabilities, &capabilities[0]);
 	if ( rc == -1 ) {
@@ -175,42 +163,80 @@ unsigned long xen_architecture(struct crash_elf_info *elf_info)
 	return machine;
 }
 
-static int xen_crash_note_callback(void *UNUSED(data), int nr,
-				   char *UNUSED(str),
-				   unsigned long base,
-				   unsigned long length)
+#ifdef HAVE_LIBXENCTRL
+int get_xen_vmcoreinfo(uint64_t *addr, uint64_t *len)
 {
-	struct crash_note_info *note = xen_phys_notes + nr;
+	xc_interface *xc;
+	int ret = 0;
+
+	xc = xc_interface_open(NULL, NULL, 0);
+	if (!xc) {
+	        fprintf(stderr, "failed to open xen control interface.\n");
+	        return -1;
+	}
 
-	note->base = base;
-	note->length = length;
+	ret = xc_kexec_get_range(xc, KEXEC_RANGE_MA_VMCOREINFO, 0, len, addr);
 
+	xc_interface_close(xc);
+
+	if (ret < 0)
+	        return -1;
 	return 0;
 }
 
 int xen_get_nr_phys_cpus(void)
 {
-	char *match = "Crash note\n";
-	int cpus, n;
+	xc_interface *xc;
+	int max_cpus;
+	int cpu = -1;
 
 	if (xen_phys_cpus)
 		return xen_phys_cpus;
 
-	if ((cpus = kexec_iomem_for_each_line(match, NULL, NULL))) {
-		n = sizeof(struct crash_note_info) * cpus;
-		xen_phys_notes = malloc(n);
-		if (!xen_phys_notes) {
-			fprintf(stderr, "failed to allocate xen_phys_notes.\n");
-			return -1;
-		}
-		memset(xen_phys_notes, 0, n);
-		kexec_iomem_for_each_line(match,
-					  xen_crash_note_callback, NULL);
-		xen_phys_cpus = cpus;
+	xc = xc_interface_open(NULL, NULL, 0);
+	if (!xc) {
+		fprintf(stderr, "failed to open xen control interface.\n");
+		return -1;
+	}
+
+	max_cpus = xc_get_max_cpus(xc);
+	if (max_cpus <= 0)
+		goto out;
+
+	xen_phys_notes = calloc(max_cpus, sizeof(*xen_phys_notes));
+	if (xen_phys_notes == NULL)
+		goto out;
+
+	for (cpu = 0; cpu < max_cpus; cpu++) {
+		uint64_t size, start;
+		int ret;
+
+		ret = xc_kexec_get_range(xc, KEXEC_RANGE_MA_CPU, cpu, &size, &start);
+		if (ret < 0)
+			break;
+
+		xen_phys_notes[cpu].base = start;
+		xen_phys_notes[cpu].length = size;
 	}
 
-	return cpus;
+	xen_phys_cpus = cpu;
+
+out:
+	xc_interface_close(xc);
+	return cpu;
+}
+#else
+int get_xen_vmcoreinfo(uint64_t *addr, uint64_t *len)
+{
+	return -1;
+}
+
+int xen_get_nr_phys_cpus(void)
+{
+	return -1;
 }
+#endif
+
 
 int xen_get_note(int cpu, uint64_t *addr, uint64_t *len)
 {
@@ -226,3 +252,37 @@ int xen_get_note(int cpu, uint64_t *addr, uint64_t *len)
 
 	return 0;
 }
+
+#ifdef HAVE_LIBXENCTRL
+int xen_get_crashkernel_region(uint64_t *start, uint64_t *end)
+{
+	uint64_t size;
+	xc_interface *xc;
+	int rc = -1;
+
+	xc = xc_interface_open(NULL, NULL, 0);
+	if (!xc) {
+		fprintf(stderr, "failed to open xen control interface.\n");
+		goto out;
+	}
+
+	rc = xc_kexec_get_range(xc, KEXEC_RANGE_MA_CRASH, 0, &size, start);
+	if (rc < 0) {
+		fprintf(stderr, "failed to get crash region from hypervisor.\n");
+		goto out_close;
+	}
+
+	*end = *start + size - 1;
+
+out_close:
+	xc_interface_close(xc);
+
+out:
+	return rc;
+}
+#else
+int xen_get_crashkernel_region(uint64_t *start, uint64_t *end)
+{
+	return -1;
+}
+#endif