Patchwork [v4,09/17] target-i386: Add cpu object access routines for Hypervisor vendor.

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Submitter Don Slutz
Date Sept. 20, 2012, 8:03 p.m.
Message ID <1348171412-23669-10-git-send-email-Don@CloudSwitch.com>
Download mbox | patch
Permalink /patch/185497/
State New
Headers show

Comments

Don Slutz - Sept. 20, 2012, 8:03 p.m.
These are modeled after x86_cpuid_set_vendor and x86_cpuid_get_vendor.
Since kvm's vendor is shorter, the test for correct size is removed and zero padding is added.

Set Microsoft's Vendor now that we can.  Value defined in:
  http://msdn.microsoft.com/en-us/library/windows/hardware/ff542428%28v=vs.85%29.aspx
And matches want is in target-i386/kvm.c

Signed-off-by: Don Slutz <Don@CloudSwitch.com>
---
 target-i386/cpu.c |   44 ++++++++++++++++++++++++++++++++++++++++++++
 target-i386/cpu.h |    2 ++
 2 files changed, 46 insertions(+), 0 deletions(-)

Patch

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index b7532b7..d8f7e22 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1191,12 +1191,53 @@  static void x86_cpuid_set_hv_level(Object *obj, Visitor *v, void *opaque,
     cpu->env.cpuid_hv_level = value;
 }
 
+static char *x86_cpuid_get_hv_vendor(Object *obj, Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    CPUX86State *env = &cpu->env;
+    char *value;
+    int i;
+
+    value = (char *)g_malloc(CPUID_VENDOR_SZ + 1);
+    for (i = 0; i < 4; i++) {
+        value[i + 0] = env->cpuid_hv_vendor1 >> (8 * i);
+        value[i + 4] = env->cpuid_hv_vendor2 >> (8 * i);
+        value[i + 8] = env->cpuid_hv_vendor3 >> (8 * i);
+    }
+    value[CPUID_VENDOR_SZ] = '\0';
+
+    return value;
+}
+
+static void x86_cpuid_set_hv_vendor(Object *obj, const char *value,
+                                     Error **errp)
+{
+    X86CPU *cpu = X86_CPU(obj);
+    CPUX86State *env = &cpu->env;
+    int i;
+    char adj_value[CPUID_VENDOR_SZ + 1];
+
+    memset(adj_value, 0, sizeof(adj_value));
+
+    pstrcpy(adj_value, sizeof(adj_value), value);
+
+    env->cpuid_hv_vendor1 = 0;
+    env->cpuid_hv_vendor2 = 0;
+    env->cpuid_hv_vendor3 = 0;
+    for (i = 0; i < 4; i++) {
+        env->cpuid_hv_vendor1 |= ((uint8_t)adj_value[i + 0]) << (8 * i);
+        env->cpuid_hv_vendor2 |= ((uint8_t)adj_value[i + 4]) << (8 * i);
+        env->cpuid_hv_vendor3 |= ((uint8_t)adj_value[i + 8]) << (8 * i);
+    }
+}
+
 #if !defined(CONFIG_USER_ONLY)
 static void x86_set_hyperv(Object *obj, Error **errp)
 {
     X86CPU *cpu = X86_CPU(obj);
 
     cpu->env.cpuid_hv_level = CPUID_HV_LEVEL_HYPERV;
+    x86_cpuid_set_hv_vendor(obj, CPUID_HV_VENDOR_HYPERV, errp);
 }
 
 static void x86_get_hv_spinlocks(Object *obj, Visitor *v, void *opaque,
@@ -2121,6 +2162,9 @@  static void x86_cpu_initfn(Object *obj)
     object_property_add(obj, "hypervisor-level", "int",
                         x86_cpuid_get_hv_level,
                         x86_cpuid_set_hv_level, NULL, NULL, NULL);
+    object_property_add_str(obj, "hypervisor-vendor",
+                            x86_cpuid_get_hv_vendor,
+                            x86_cpuid_set_hv_vendor, NULL);
 #if !defined(CONFIG_USER_ONLY)
     object_property_add(obj, "hv_spinlocks", "int",
                         x86_get_hv_spinlocks,
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index e13a44a..91ddf76 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -488,6 +488,8 @@ 
 
 #define CPUID_VENDOR_VIA   "CentaurHauls"
 
+#define CPUID_HV_VENDOR_HYPERV "Microsoft Hv"
+
 #define CPUID_HV_LEVEL_HYPERV  0x40000005
 
 #define CPUID_MWAIT_IBE     (1 << 1) /* Interrupts can exit capability */