[Qemu-devel] [PATCH V12 05/17] xen: Add xenfv machine

[anthony.perard@citrix.com]

From: Anthony PERARD <anthony.perard@citrix.com>

Introduce the Xen FV (Fully Virtualized) machine to Qemu, some more Xen
specific call will be added in further patches.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 hw/pc.c      |   19 +++++++++++++++++--
 hw/pc_piix.c |   17 +++++++++++++++++
 hw/xen.h     |    4 ++++
 3 files changed, 38 insertions(+), 2 deletions(-)

diff --git a/hw/pc.c b/hw/pc.c
index 6939c04..d7732d4 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -41,6 +41,7 @@
 #include "sysemu.h"
 #include "blockdev.h"
 #include "ui/qemu-spice.h"
+#include "xen.h"
 
 /* output Bochs bios info messages */
 //#define DEBUG_BIOS
@@ -918,7 +919,11 @@ static void pc_cpu_reset(void *opaque)
     CPUState *env = opaque;
 
     cpu_reset(env);
-    env->halted = !cpu_is_bsp(env);
+    if (!xen_enabled()) {
+        env->halted = !cpu_is_bsp(env);
+    } else {
+        env->halted = 1;
+    }
 }
 
 static CPUState *pc_new_cpu(const char *cpu_model)
@@ -952,7 +957,12 @@ void pc_cpus_init(const char *cpu_model)
 #endif
     }
 
-    for(i = 0; i < smp_cpus; i++) {
+    if (!xen_enabled()) {
+        for(i = 0; i < smp_cpus; i++) {
+            pc_new_cpu(cpu_model);
+        }
+    } else {
+        /* Xen require only one Qemu VCPU */
         pc_new_cpu(cpu_model);
     }
 }
@@ -980,6 +990,11 @@ void pc_memory_init(ram_addr_t ram_size,
     *above_4g_mem_size_p = above_4g_mem_size;
     *below_4g_mem_size_p = below_4g_mem_size;
 
+    if (xen_enabled()) {
+        /* Nothing to do for Xen */
+        return;
+    }
+
     linux_boot = (kernel_filename != NULL);
 
     /* allocate RAM */
diff --git a/hw/pc_piix.c b/hw/pc_piix.c
index b3ede89..6eff06e 100644
--- a/hw/pc_piix.c
+++ b/hw/pc_piix.c
@@ -37,6 +37,10 @@
 #include "sysbus.h"
 #include "arch_init.h"
 #include "blockdev.h"
+#include "xen.h"
+#ifdef CONFIG_XEN
+#  include <xen/hvm/hvm_info_table.h>
+#endif
 
 #define MAX_IDE_BUS 2
 
@@ -391,6 +395,16 @@ static QEMUMachine isapc_machine = {
     .max_cpus = 1,
 };
 
+#ifdef CONFIG_XEN
+static QEMUMachine xenfv_machine = {
+    .name = "xenfv",
+    .desc = "Xen Fully-virtualized PC",
+    .init = pc_init_pci,
+    .max_cpus = HVM_MAX_VCPUS,
+    .default_machine_opts = "accel=xen",
+};
+#endif
+
 static void pc_machine_init(void)
 {
     qemu_register_machine(&pc_machine);
@@ -399,6 +413,9 @@ static void pc_machine_init(void)
     qemu_register_machine(&pc_machine_v0_11);
     qemu_register_machine(&pc_machine_v0_10);
     qemu_register_machine(&isapc_machine);
+#ifdef CONFIG_XEN
+    qemu_register_machine(&xenfv_machine);
+#endif
 }
 
 machine_init(pc_machine_init);
diff --git a/hw/xen.h b/hw/xen.h
index 1fefe3a..726360a 100644
--- a/hw/xen.h
+++ b/hw/xen.h
@@ -31,4 +31,8 @@ static inline int xen_enabled(void)
 
 int xen_init(void);
 
+#if defined(CONFIG_XEN) && CONFIG_XEN_CTRL_INTERFACE_VERSION < 400
+#  define HVM_MAX_VCPUS 32
+#endif
+
 #endif /* QEMU_HW_XEN_H */
-- 
1.7.2.3