diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/cpu/vmware.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/cpu/vmware.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/cpu/vmware.c b/ANDROID_3.4.5/arch/x86/kernel/cpu/vmware.c deleted file mode 100644 index d22d0c4e..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/cpu/vmware.c +++ /dev/null @@ -1,134 +0,0 @@ -/* - * 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/module.h> -#include <asm/div64.h> -#include <asm/x86_init.h> -#include <asm/hypervisor.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, 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; -} - -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); - printk(KERN_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; -} - -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; - else - printk(KERN_WARNING - "Failed to get TSC freq from the hypervisor\n"); -} - -/* - * 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 bool __init vmware_platform(void) -{ - if (cpu_has_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 true; - } else if (dmi_available && dmi_name_in_serial("VMware") && - __vmware_platform()) - return true; - - return false; -} - -/* - * 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 __cpuinit vmware_set_cpu_features(struct cpuinfo_x86 *c) -{ - set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC); - set_cpu_cap(c, X86_FEATURE_TSC_RELIABLE); -} - -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, -}; -EXPORT_SYMBOL(x86_hyper_vmware); |