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Drivers: hv: vmbus: Move the extracting of Hypervisor version information

Browse Source 
As part of the effort to separate out architecture specific code,
extract hypervisor version information in an architecture specific
file.

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2017-01-19 11:51:47 -07:00 committed by Greg Kroah-Hartman
parent 63ed4e0c67
commit 8de8af7e08
5 changed files with 41 additions and 81 deletions
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19
arch/x86/include/asm/mshyperv.h
View File

@ -5,6 +5,25 @@
#include <linux/interrupt.h>
#include <asm/hyperv.h>
/*
* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
* is set by CPUID(HVCPUID_VERSION_FEATURES).
*/
enum hv_cpuid_function {
HVCPUID_VERSION_FEATURES = 0x00000001,
HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
HVCPUID_INTERFACE = 0x40000001,
/*
* The remaining functions depend on the value of
* HVCPUID_INTERFACE
*/
HVCPUID_VERSION = 0x40000002,
HVCPUID_FEATURES = 0x40000003,
HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
};
struct ms_hyperv_info {
u32 features;
u32 misc_features;

20
arch/x86/kernel/cpu/mshyperv.c
View File

@ -160,6 +160,11 @@ static int hv_nmi_unknown(unsigned int val, struct pt_regs *regs)
static void __init ms_hyperv_init_platform(void)
{
int hv_host_info_eax;
int hv_host_info_ebx;
int hv_host_info_ecx;
int hv_host_info_edx;
/*
* Extract the features and hints
*/
@ -170,6 +175,21 @@ static void __init ms_hyperv_init_platform(void)
pr_info("HyperV: features 0x%x, hints 0x%x\n",
ms_hyperv.features, ms_hyperv.hints);
/*
* Extract host information.
*/
if (cpuid_eax(HVCPUID_VENDOR_MAXFUNCTION) >= HVCPUID_VERSION) {
hv_host_info_eax = cpuid_eax(HVCPUID_VERSION);
hv_host_info_ebx = cpuid_ebx(HVCPUID_VERSION);
hv_host_info_ecx = cpuid_ecx(HVCPUID_VERSION);
hv_host_info_edx = cpuid_edx(HVCPUID_VERSION);
pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n",
hv_host_info_eax, hv_host_info_ebx >> 16,
hv_host_info_ebx & 0xFFFF, hv_host_info_ecx,
hv_host_info_edx >> 24, hv_host_info_edx & 0xFFFFFF);
}
#ifdef CONFIG_X86_LOCAL_APIC
if (ms_hyperv.features & HV_X64_MSR_APIC_FREQUENCY_AVAILABLE) {
/*

7
drivers/hv/connection.c
View File

@ -221,11 +221,8 @@ int vmbus_connect(void)
goto cleanup;
vmbus_proto_version = version;
pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d; Vmbus version:%d.%d\n",
host_info_eax, host_info_ebx >> 16,
host_info_ebx & 0xFFFF, host_info_ecx,
host_info_edx >> 24, host_info_edx & 0xFFFFFF,
version >> 16, version & 0xFFFF);
pr_info("Vmbus version:%d.%d\n",
version >> 16, version & 0xFFFF);
kfree(msginfo);
return 0;

49
drivers/hv/hv.c
View File

@ -42,51 +42,6 @@ struct hv_context hv_context = {
#define HV_MAX_MAX_DELTA_TICKS 0xffffffff
#define HV_MIN_DELTA_TICKS 1
/*
* query_hypervisor_info - Get version info of the windows hypervisor
*/
unsigned int host_info_eax;
unsigned int host_info_ebx;
unsigned int host_info_ecx;
unsigned int host_info_edx;
static int query_hypervisor_info(void)
{
unsigned int eax;
unsigned int ebx;
unsigned int ecx;
unsigned int edx;
unsigned int max_leaf;
unsigned int op;
/*
* Its assumed that this is called after confirming that Viridian
* is present. Query id and revision.
*/
eax = 0;
ebx = 0;
ecx = 0;
edx = 0;
op = HVCPUID_VENDOR_MAXFUNCTION;
cpuid(op, &eax, &ebx, &ecx, &edx);
max_leaf = eax;
if (max_leaf >= HVCPUID_VERSION) {
eax = 0;
ebx = 0;
ecx = 0;
edx = 0;
op = HVCPUID_VERSION;
cpuid(op, &eax, &ebx, &ecx, &edx);
host_info_eax = eax;
host_info_ebx = ebx;
host_info_ecx = ecx;
host_info_edx = edx;
}
return max_leaf;
}
/*
* hv_init - Main initialization routine.
*
@ -94,7 +49,6 @@ static int query_hypervisor_info(void)
*/
int hv_init(void)
{
int max_leaf;
union hv_x64_msr_hypercall_contents hypercall_msr;
memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
@ -111,9 +65,6 @@ int hv_init(void)
memset(hv_context.clk_evt, 0,
sizeof(void *) * NR_CPUS);
max_leaf = query_hypervisor_info();
/* See if the hypercall page is already set */
hypercall_msr.as_uint64 = 0;
rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);

27
drivers/hv/hyperv_vmbus.h
View File

@ -40,25 +40,6 @@
*/
#define HV_UTIL_NEGO_TIMEOUT 55
/*
* The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
* is set by CPUID(HVCPUID_VERSION_FEATURES).
*/
enum hv_cpuid_function {
HVCPUID_VERSION_FEATURES = 0x00000001,
HVCPUID_VENDOR_MAXFUNCTION = 0x40000000,
HVCPUID_INTERFACE = 0x40000001,
/*
* The remaining functions depend on the value of
* HVCPUID_INTERFACE
*/
HVCPUID_VERSION = 0x40000002,
HVCPUID_FEATURES = 0x40000003,
HVCPUID_ENLIGHTENMENT_INFO = 0x40000004,
HVCPUID_IMPLEMENTATION_LIMITS = 0x40000005,
};
#define HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE 0x400
#define HV_X64_MSR_CRASH_P0 0x40000100
@ -444,14 +425,6 @@ extern int hv_synic_cleanup(unsigned int cpu);
extern void hv_synic_clockevents_cleanup(void);
/*
* Host version information.
*/
extern unsigned int host_info_eax;
extern unsigned int host_info_ebx;
extern unsigned int host_info_ecx;
extern unsigned int host_info_edx;
/* Interface */