diff options
Diffstat (limited to 'drivers/hv/hv.c')
| -rw-r--r-- | drivers/hv/hv.c | 34 |
1 files changed, 6 insertions, 28 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index 86f8885aeb45..3648f8f0f368 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -26,6 +26,7 @@ #include <linux/slab.h> #include <linux/vmalloc.h> #include <linux/hyperv.h> +#include <linux/version.h> #include <asm/hyperv.h> #include "hyperv_vmbus.h" @@ -38,28 +39,6 @@ struct hv_context hv_context = { }; /* - * query_hypervisor_presence - * - Query the cpuid for presence of windows hypervisor - */ -static int query_hypervisor_presence(void) -{ - unsigned int eax; - unsigned int ebx; - unsigned int ecx; - unsigned int edx; - unsigned int op; - - eax = 0; - ebx = 0; - ecx = 0; - edx = 0; - op = HVCPUID_VERSION_FEATURES; - cpuid(op, &eax, &ebx, &ecx, &edx); - - return ecx & HV_PRESENT_BIT; -} - -/* * query_hypervisor_info - Get version info of the windows hypervisor */ static int query_hypervisor_info(void) @@ -159,14 +138,13 @@ int hv_init(void) memset(hv_context.synic_message_page, 0, sizeof(void *) * NR_CPUS); - if (!query_hypervisor_presence()) - goto cleanup; - max_leaf = query_hypervisor_info(); - /* Write our OS info */ - wrmsrl(HV_X64_MSR_GUEST_OS_ID, HV_LINUX_GUEST_ID); - hv_context.guestid = HV_LINUX_GUEST_ID; + /* + * Write our OS ID. + */ + hv_context.guestid = generate_guest_id(0, LINUX_VERSION_CODE, 0); + wrmsrl(HV_X64_MSR_GUEST_OS_ID, hv_context.guestid); /* See if the hypercall page is already set */ rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); |