Release 4.9 arch/x86/kernel/cpu/vmware.c
/*
* VMware Detection code.
*
* Copyright (C) 2008, VMware, Inc.
* Author : Alok N Kataria <akataria@vmware.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <linux/dmi.h>
#include <linux/init.h>
#include <linux/export.h>
#include <asm/div64.h>
#include <asm/x86_init.h>
#include <asm/hypervisor.h>
#include <asm/timer.h>
#include <asm/apic.h>
#define CPUID_VMWARE_INFO_LEAF 0x40000000
#define VMWARE_HYPERVISOR_MAGIC 0x564D5868
#define VMWARE_HYPERVISOR_PORT 0x5658
#define VMWARE_PORT_CMD_GETVERSION 10
#define VMWARE_PORT_CMD_GETHZ 45
#define VMWARE_PORT_CMD_GETVCPU_INFO 68
#define VMWARE_PORT_CMD_LEGACY_X2APIC 3
#define VMWARE_PORT_CMD_VCPU_RESERVED 31
#define VMWARE_PORT(cmd, eax, ebx, ecx, edx) \
__asm__("inl (%%dx)" : \
"=a"(eax), "=c"(ecx), "=d"(edx), "=b"(ebx) : \
"0"(VMWARE_HYPERVISOR_MAGIC), \
"1"(VMWARE_PORT_CMD_##cmd), \
"2"(VMWARE_HYPERVISOR_PORT), "3"(UINT_MAX) : \
"memory");
static inline int __vmware_platform(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVERSION, eax, ebx, ecx, edx);
return eax != (uint32_t)-1 && ebx == VMWARE_HYPERVISOR_MAGIC;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 44 | 100.00% | 1 | 100.00% |
| Total | 44 | 100.00% | 1 | 100.00% |
static unsigned long vmware_get_tsc_khz(void)
{
uint64_t tsc_hz, lpj;
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
tsc_hz = eax | (((uint64_t)ebx) << 32);
do_div(tsc_hz, 1000);
BUG_ON(tsc_hz >> 32);
pr_info("TSC freq read from hypervisor : %lu.%03lu MHz\n",
(unsigned long) tsc_hz / 1000,
(unsigned long) tsc_hz % 1000);
if (!preset_lpj) {
lpj = ((u64)tsc_hz * 1000);
do_div(lpj, HZ);
preset_lpj = lpj;
}
return tsc_hz;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 116 | 98.31% | 3 | 60.00% |
| chen yucong | chen yucong | 1 | 0.85% | 1 | 20.00% |
| thomas gleixner | thomas gleixner | 1 | 0.85% | 1 | 20.00% |
| Total | 118 | 100.00% | 5 | 100.00% |
static void __init vmware_platform_setup(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETHZ, eax, ebx, ecx, edx);
if (ebx != UINT_MAX) {
x86_platform.calibrate_tsc = vmware_get_tsc_khz;
#ifdef CONFIG_X86_LOCAL_APIC
/* Skip lapic calibration since we know the bus frequency. */
lapic_timer_frequency = ecx / HZ;
pr_info("Host bus clock speed read from hypervisor : %u Hz\n",
ecx);
#endif
} else {
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
#ifdef CONFIG_X86_IO_APIC
no_timer_check = 1;
#endif
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| thomas gleixner | thomas gleixner | 42 | 51.85% | 1 | 16.67% |
| renat valiullin | renat valiullin | 32 | 39.51% | 2 | 33.33% |
| alok kataria | alok kataria | 5 | 6.17% | 1 | 16.67% |
| h. peter anvin | h. peter anvin | 1 | 1.23% | 1 | 16.67% |
| chen yucong | chen yucong | 1 | 1.23% | 1 | 16.67% |
| Total | 81 | 100.00% | 6 | 100.00% |
/*
* While checking the dmi string information, just checking the product
* serial key should be enough, as this will always have a VMware
* specific string when running under VMware hypervisor.
*/
static uint32_t __init vmware_platform(void)
{
if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) {
unsigned int eax;
unsigned int hyper_vendor_id[3];
cpuid(CPUID_VMWARE_INFO_LEAF, &eax, &hyper_vendor_id[0],
&hyper_vendor_id[1], &hyper_vendor_id[2]);
if (!memcmp(hyper_vendor_id, "VMwareVMware", 12))
return CPUID_VMWARE_INFO_LEAF;
} else if (dmi_available && dmi_name_in_serial("VMware") &&
__vmware_platform())
return 1;
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 66 | 74.16% | 2 | 40.00% |
| h. peter anvin | h. peter anvin | 15 | 16.85% | 1 | 20.00% |
| jason wang | jason wang | 4 | 4.49% | 1 | 20.00% |
| borislav petkov | borislav petkov | 4 | 4.49% | 1 | 20.00% |
| Total | 89 | 100.00% | 5 | 100.00% |
/*
* VMware hypervisor takes care of exporting a reliable TSC to the guest.
* Still, due to timing difference when running on virtual cpus, the TSC can
* be marked as unstable in some cases. For example, the TSC sync check at
* bootup can fail due to a marginal offset between vcpus' TSCs (though the
* TSCs do not drift from each other). Also, the ACPI PM timer clocksource
* is not suitable as a watchdog when running on a hypervisor because the
* kernel may miss a wrap of the counter if the vcpu is descheduled for a
* long time. To skip these checks at runtime we set these capability bits,
* so that the kernel could just trust the hypervisor with providing a
* reliable virtual TSC that is suitable for timekeeping.
*/
static void vmware_set_cpu_features(struct cpuinfo_x86 *c)
{
set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 23 | 92.00% | 1 | 50.00% |
| h. peter anvin | h. peter anvin | 2 | 8.00% | 1 | 50.00% |
| Total | 25 | 100.00% | 2 | 100.00% |
/* Checks if hypervisor supports x2apic without VT-D interrupt remapping. */
static bool __init vmware_legacy_x2apic_available(void)
{
uint32_t eax, ebx, ecx, edx;
VMWARE_PORT(GETVCPU_INFO, eax, ebx, ecx, edx);
return (eax & (1 << VMWARE_PORT_CMD_VCPU_RESERVED)) == 0 &&
(eax & (1 << VMWARE_PORT_CMD_LEGACY_X2APIC)) != 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 56 | 100.00% | 1 | 100.00% |
| Total | 56 | 100.00% | 1 | 100.00% |
const __refconst struct hypervisor_x86 x86_hyper_vmware = {
.name = "VMware",
.detect = vmware_platform,
.set_cpu_features = vmware_set_cpu_features,
.init_platform = vmware_platform_setup,
.x2apic_available = vmware_legacy_x2apic_available,
};
EXPORT_SYMBOL(x86_hyper_vmware);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| alok kataria | alok kataria | 372 | 70.59% | 7 | 36.84% |
| h. peter anvin | h. peter anvin | 53 | 10.06% | 2 | 10.53% |
| thomas gleixner | thomas gleixner | 45 | 8.54% | 1 | 5.26% |
| renat valiullin | renat valiullin | 38 | 7.21% | 2 | 10.53% |
| jason wang | jason wang | 4 | 0.76% | 1 | 5.26% |
| borislav petkov | borislav petkov | 4 | 0.76% | 1 | 5.26% |
| paul gortmaker | paul gortmaker | 4 | 0.76% | 1 | 5.26% |
| dmitry torokhov | dmitry torokhov | 2 | 0.38% | 1 | 5.26% |
| hannes eder | hannes eder | 2 | 0.38% | 1 | 5.26% |
| chen yucong | chen yucong | 2 | 0.38% | 1 | 5.26% |
| lucas de marchi | lucas de marchi | 1 | 0.19% | 1 | 5.26% |
| Total | 527 | 100.00% | 19 | 100.00% |