[PATCH v6 08/16] target-i386: Add cpu object access routines for Hypervisor vendor.

Don Slutz
2012-09-24T14:32:52Z

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 | 46 ++++++++++++++++++++++++++++++++++++++++++++++
target-i386/cpu.h | 2 ++
2 files changed, 48 insertions(+), 0 deletions(-)

diff --git a/target-i386/cpu.c b/target-i386/cpu.c
index 920278b..964877f 100644
--- a/target-i386/cpu.c
+++ b/target-i386/cpu.c
@@ -1192,11 +1192,54 @@ static void x86_cpuid_set_hv_level(Object *obj, Visitor *v, void *opaque,
cpu->env.cpuid_hv_level_set = true;
}

+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);
+ }
+ env->cpuid_hv_vendor_set = true;
+}
+
#if !defined(CONFIG_USER_ONLY)
static void x86_set_hyperv(Object *obj, Error **errp)
{
object_property_set_int(obj, CPUID_HV_LEVEL_HYPERV,
"hypervisor-level", errp);
+ object_property_set_str(obj, CPUID_HV_VENDOR_HYPERV,
+ "hypervisor-vendor", errp);
}

static void x86_get_hv_spinlocks(Object *obj, Visitor *v, void *opaque,
@@ -2126,6 +2169,9 @@ 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 11730b2..eb6aa4a 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 */
--
1.7.1