tools/libxc: x86 common code

Save/restore records common to all x86 domain types (HVM, PV).

This is only the TSC_INFO record.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>

tools/libxc/Makefile

@@ -55,6 +55,7 @@ GUEST_SRCS-y += xg_private.c xc_suspend.c
 ifeq ($(CONFIG_MIGRATE),y)
 GUEST_SRCS-y += xc_domain_restore.c xc_domain_save.c
 GUEST_SRCS-y += xc_sr_common.c
+GUEST_SRCS-$(CONFIG_X86) += xc_sr_common_x86.c
 GUEST_SRCS-y += xc_sr_restore.c
 GUEST_SRCS-y += xc_sr_save.c
 GUEST_SRCS-y += xc_offline_page.c xc_compression.c

tools/libxc/xc_sr_common_x86.c

@@ -0,0 +1,54 @@
+#include "xc_sr_common_x86.h"
+
+int write_tsc_info(struct xc_sr_context *ctx)
+{
+    xc_interface *xch = ctx->xch;
+    struct xc_sr_rec_tsc_info tsc = { 0 };
+    struct xc_sr_record rec =
+    {
+        .type = REC_TYPE_TSC_INFO,
+        .length = sizeof(tsc),
+        .data = &tsc
+    };
+
+    if ( xc_domain_get_tsc_info(xch, ctx->domid, &tsc.mode,
+                                &tsc.nsec, &tsc.khz, &tsc.incarnation) < 0 )
+    {
+        PERROR("Unable to obtain TSC information");
+        return -1;
+    }
+
+    return write_record(ctx, &rec);
+}
+
+int handle_tsc_info(struct xc_sr_context *ctx, struct xc_sr_record *rec)
+{
+    xc_interface *xch = ctx->xch;
+    struct xc_sr_rec_tsc_info *tsc = rec->data;
+
+    if ( rec->length != sizeof(*tsc) )
+    {
+        ERROR("TSC_INFO record wrong size: length %u, expected %zu",
+              rec->length, sizeof(*tsc));
+        return -1;
+    }
+
+    if ( xc_domain_set_tsc_info(xch, ctx->domid, tsc->mode,
+                                tsc->nsec, tsc->khz, tsc->incarnation) )
+    {
+        PERROR("Unable to set TSC information");
+        return -1;
+    }
+
+    return 0;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */

tools/libxc/xc_sr_common_x86.h

@@ -0,0 +1,26 @@
+#ifndef __COMMON_X86__H
+#define __COMMON_X86__H
+
+#include "xc_sr_common.h"
+
+/*
+ * Obtains a domains TSC information from Xen and writes a TSC_INFO record
+ * into the stream.
+ */
+int write_tsc_info(struct xc_sr_context *ctx);
+
+/*
+ * Parses a TSC_INFO record and applies the result to the domain.
+ */
+int handle_tsc_info(struct xc_sr_context *ctx, struct xc_sr_record *rec);
+
+#endif
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */