mirror of
https://github.com/opnsense/src.git
synced 2026-04-15 14:29:58 -04:00
Rework virtual machine hypervisor detection.
- Move the existing code to x86/x86/identcpu.c since it is x86-specific. - If the CPUID2_HV flag is set, assume a hypervisor is present and query the 0x40000000 leaf to determine the hypervisor vendor ID. Export the vendor ID and the highest supported hypervisor CPUID leaf via hv_vendor[] and hv_high variables, respectively. The hv_vendor[] array is also exported via the hw.hv_vendor sysctl. - Merge the VMWare detection code from tsc.c into the new probe in identcpu.c. Add a VM_GUEST_VMWARE to identify vmware and use that in the TSC code to identify VMWare. Differential Revision: https://reviews.freebsd.org/D1010 Reviewed by: delphij, jkim, neel
This commit is contained in:
John Baldwin
parent
8839e0e9f3
commit
01e1933dcc
7 changed files with 187 additions and 134 deletions
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@ -62,6 +62,8 @@ extern u_int cpu_mon_mwait_flags;
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extern u_int cpu_mon_min_size;
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extern u_int cpu_mon_max_size;
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extern char ctx_switch_xsave[];
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extern u_int hv_high;
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extern char hv_vendor[];
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extern char kstack[];
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extern char sigcode[];
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extern int szsigcode;
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@ -64,6 +64,8 @@ extern u_int cyrix_did;
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#if defined(I586_CPU) && !defined(NO_F00F_HACK)
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extern int has_f00f_bug;
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#endif
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extern u_int hv_high;
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extern char hv_vendor[];
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extern char kstack[];
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extern char sigcode[];
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extern int szsigcode;
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@ -99,7 +99,11 @@ pid_t pid_max = PID_MAX;
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long maxswzone; /* max swmeta KVA storage */
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long maxbcache; /* max buffer cache KVA storage */
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long maxpipekva; /* Limit on pipe KVA */
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int vm_guest; /* Running as virtual machine guest? */
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#ifdef XEN
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int vm_guest = VM_GUEST_XEN;
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#else
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int vm_guest = VM_GUEST_NO; /* Running as virtual machine guest? */
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#endif
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u_long maxtsiz; /* max text size */
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u_long dfldsiz; /* initial data size limit */
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u_long maxdsiz; /* max data size */
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@ -136,7 +140,7 @@ SYSCTL_ULONG(_kern, OID_AUTO, sgrowsiz, CTLFLAG_RWTUN | CTLFLAG_NOFETCH, &sgrows
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"Amount to grow stack on a stack fault");
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SYSCTL_PROC(_kern, OID_AUTO, vm_guest, CTLFLAG_RD | CTLTYPE_STRING,
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NULL, 0, sysctl_kern_vm_guest, "A",
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"Virtual machine guest detected? (none|generic|xen)");
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"Virtual machine guest detected?");
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/*
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* These have to be allocated somewhere; allocating
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@ -154,73 +158,18 @@ static const char *const vm_guest_sysctl_names[] = {
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"generic",
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"xen",
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"hv",
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"vmware",
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NULL
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};
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CTASSERT(nitems(vm_guest_sysctl_names) - 1 == VM_LAST);
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#ifndef XEN
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static const char *const vm_bnames[] = {
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"QEMU", /* QEMU */
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"Plex86", /* Plex86 */
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"Bochs", /* Bochs */
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"Xen", /* Xen */
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"BHYVE", /* bhyve */
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"Seabios", /* KVM */
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NULL
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};
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static const char *const vm_pnames[] = {
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"VMware Virtual Platform", /* VMWare VM */
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"Virtual Machine", /* Microsoft VirtualPC */
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"VirtualBox", /* Sun xVM VirtualBox */
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"Parallels Virtual Platform", /* Parallels VM */
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"KVM", /* KVM */
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NULL
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};
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/*
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* Detect known Virtual Machine hosts by inspecting the emulated BIOS.
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*/
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static enum VM_GUEST
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detect_virtual(void)
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{
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char *sysenv;
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int i;
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sysenv = kern_getenv("smbios.bios.vendor");
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if (sysenv != NULL) {
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for (i = 0; vm_bnames[i] != NULL; i++)
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if (strcmp(sysenv, vm_bnames[i]) == 0) {
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freeenv(sysenv);
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return (VM_GUEST_VM);
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}
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freeenv(sysenv);
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}
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sysenv = kern_getenv("smbios.system.product");
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if (sysenv != NULL) {
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for (i = 0; vm_pnames[i] != NULL; i++)
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if (strcmp(sysenv, vm_pnames[i]) == 0) {
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freeenv(sysenv);
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return (VM_GUEST_VM);
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}
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freeenv(sysenv);
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}
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return (VM_GUEST_NO);
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}
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#endif
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/*
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* Boot time overrides that are not scaled against main memory
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*/
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void
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init_param1(void)
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{
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#ifndef XEN
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vm_guest = detect_virtual();
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#else
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vm_guest = VM_GUEST_XEN;
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#endif
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hz = -1;
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TUNABLE_INT_FETCH("kern.hz", &hz);
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if (hz == -1)
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@ -73,7 +73,7 @@ extern int vm_guest; /* Running as virtual machine guest? */
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* Keep in sync with vm_guest_sysctl_names[].
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*/
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enum VM_GUEST { VM_GUEST_NO = 0, VM_GUEST_VM, VM_GUEST_XEN, VM_GUEST_HV,
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VM_LAST };
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VM_GUEST_VMWARE, VM_LAST };
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#if defined(WITNESS) || defined(INVARIANTS)
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void kassert_panic(const char *fmt, ...) __printflike(1, 2);
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47
sys/x86/include/vmware.h
Normal file
47
sys/x86/include/vmware.h
Normal file
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@ -0,0 +1,47 @@
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/*-
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* Copyright (c) 2011-2014 Jung-uk Kim <jkim@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _X86_VMWARE_H_
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#define _X86_VMWARE_H_
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#define VMW_HVMAGIC 0x564d5868
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#define VMW_HVPORT 0x5658
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#define VMW_HVCMD_GETVERSION 10
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#define VMW_HVCMD_GETHZ 45
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static __inline void
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vmware_hvcall(u_int cmd, u_int *p)
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{
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__asm __volatile("inl %w3, %0"
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: "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
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: "0" (VMW_HVMAGIC), "1" (UINT_MAX), "2" (cmd), "3" (VMW_HVPORT)
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: "memory");
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}
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#endif /* !_X86_VMWARE_H_ */
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@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$");
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#include <sys/bus.h>
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#include <sys/cpu.h>
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#include <sys/eventhandler.h>
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#include <sys/limits.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/sysctl.h>
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@ -63,6 +64,7 @@ __FBSDID("$FreeBSD$");
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#include <amd64/vmm/intel/vmx_controls.h>
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#include <x86/isa/icu.h>
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#include <x86/vmware.h>
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#ifdef __i386__
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#define IDENTBLUE_CYRIX486 0
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@ -76,6 +78,7 @@ static u_int find_cpu_vendor_id(void);
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static void print_AMD_info(void);
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static void print_INTEL_info(void);
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static void print_INTEL_TLB(u_int data);
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static void print_hypervisor_info(void);
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static void print_svm_info(void);
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static void print_via_padlock_info(void);
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static void print_vmx_info(void);
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@ -120,6 +123,11 @@ static int hw_clockrate;
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SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD,
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&hw_clockrate, 0, "CPU instruction clock rate");
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u_int hv_high;
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char hv_vendor[16];
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SYSCTL_STRING(_hw, OID_AUTO, hv_vendor, CTLFLAG_RD, hv_vendor, 0,
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"Hypervisor vendor");
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static eventhandler_tag tsc_post_tag;
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static char cpu_brand[48];
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@ -949,7 +957,6 @@ printcpuinfo(void)
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if (tsc_perf_stat)
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printf(", performance statistics");
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}
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}
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#ifdef __i386__
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} else if (cpu_vendor_id == CPU_VENDOR_CYRIX) {
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@ -967,17 +974,18 @@ printcpuinfo(void)
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if (*cpu_vendor || cpu_id)
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printf("\n");
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if (!bootverbose)
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return;
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if (cpu_vendor_id == CPU_VENDOR_AMD)
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print_AMD_info();
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else if (cpu_vendor_id == CPU_VENDOR_INTEL)
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print_INTEL_info();
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if (bootverbose) {
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if (cpu_vendor_id == CPU_VENDOR_AMD)
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print_AMD_info();
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else if (cpu_vendor_id == CPU_VENDOR_INTEL)
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print_INTEL_info();
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#ifdef __i386__
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else if (cpu_vendor_id == CPU_VENDOR_TRANSMETA)
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print_transmeta_info();
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else if (cpu_vendor_id == CPU_VENDOR_TRANSMETA)
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print_transmeta_info();
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#endif
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}
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print_hypervisor_info();
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}
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void
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@ -1182,6 +1190,99 @@ hook_tsc_freq(void *arg __unused)
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SYSINIT(hook_tsc_freq, SI_SUB_CONFIGURE, SI_ORDER_ANY, hook_tsc_freq, NULL);
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#ifndef XEN
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static const char *const vm_bnames[] = {
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"QEMU", /* QEMU */
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"Plex86", /* Plex86 */
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"Bochs", /* Bochs */
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"Xen", /* Xen */
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"BHYVE", /* bhyve */
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"Seabios", /* KVM */
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NULL
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};
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static const char *const vm_pnames[] = {
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"VMware Virtual Platform", /* VMWare VM */
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"Virtual Machine", /* Microsoft VirtualPC */
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"VirtualBox", /* Sun xVM VirtualBox */
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"Parallels Virtual Platform", /* Parallels VM */
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"KVM", /* KVM */
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NULL
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};
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static void
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identify_hypervisor(void)
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{
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u_int regs[4];
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char *p;
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int i;
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/*
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* [RFC] CPUID usage for interaction between Hypervisors and Linux.
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* http://lkml.org/lkml/2008/10/1/246
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*
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* KB1009458: Mechanisms to determine if software is running in
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* a VMware virtual machine
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* http://kb.vmware.com/kb/1009458
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*/
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if (cpu_feature2 & CPUID2_HV) {
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vm_guest = VM_GUEST_VM;
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do_cpuid(0x40000000, regs);
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if (regs[0] >= 0x40000000) {
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hv_high = regs[0];
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((u_int *)&hv_vendor)[0] = regs[1];
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((u_int *)&hv_vendor)[1] = regs[2];
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((u_int *)&hv_vendor)[2] = regs[3];
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hv_vendor[12] = '\0';
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if (strcmp(hv_vendor, "VMwareVMware") == 0)
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vm_guest = VM_GUEST_VMWARE;
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}
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return;
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}
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/*
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* Examine SMBIOS strings for older hypervisors.
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*/
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p = kern_getenv("smbios.system.serial");
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if (p != NULL) {
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if (strncmp(p, "VMware-", 7) == 0 || strncmp(p, "VMW", 3) == 0) {
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vmware_hvcall(VMW_HVCMD_GETVERSION, regs);
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if (regs[1] == VMW_HVMAGIC) {
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vm_guest = VM_GUEST_VMWARE;
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freeenv(p);
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return;
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}
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}
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freeenv(p);
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}
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/*
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* XXX: Some of these entries may not be needed since they were
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* added to FreeBSD before the checks above.
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*/
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p = kern_getenv("smbios.bios.vendor");
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if (p != NULL) {
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for (i = 0; vm_bnames[i] != NULL; i++)
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if (strcmp(p, vm_bnames[i]) == 0) {
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vm_guest = VM_GUEST_VM;
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freeenv(p);
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return;
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}
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freeenv(p);
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}
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p = kern_getenv("smbios.system.product");
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if (p != NULL) {
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for (i = 0; vm_pnames[i] != NULL; i++)
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if (strcmp(p, vm_pnames[i]) == 0) {
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vm_guest = VM_GUEST_VM;
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freeenv(p);
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return;
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}
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freeenv(p);
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}
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}
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#endif
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/*
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* Final stage of CPU identification.
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*/
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@ -1213,6 +1314,9 @@ identify_cpu(void)
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cpu_feature2 = regs[2];
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#endif
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#ifndef XEN
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identify_hypervisor();
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#endif
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cpu_vendor_id = find_cpu_vendor_id();
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/*
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@ -2046,3 +2150,11 @@ print_vmx_info(void)
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);
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}
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}
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static void
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print_hypervisor_info(void)
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{
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if (*hv_vendor)
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printf("Hypervisor: Origin = \"%s\"\n", hv_vendor);
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}
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@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$");
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#include <machine/cputypes.h>
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#include <machine/md_var.h>
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#include <machine/specialreg.h>
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#include <x86/vmware.h>
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#include "cpufreq_if.h"
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@ -102,72 +103,11 @@ static struct timecounter tsc_timecounter = {
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800, /* quality (adjusted in code) */
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};
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#define VMW_HVMAGIC 0x564d5868
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#define VMW_HVPORT 0x5658
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#define VMW_HVCMD_GETVERSION 10
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#define VMW_HVCMD_GETHZ 45
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static __inline void
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vmware_hvcall(u_int cmd, u_int *p)
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{
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__asm __volatile("inl %w3, %0"
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: "=a" (p[0]), "=b" (p[1]), "=c" (p[2]), "=d" (p[3])
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: "0" (VMW_HVMAGIC), "1" (UINT_MAX), "2" (cmd), "3" (VMW_HVPORT)
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: "memory");
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}
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static int
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static void
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tsc_freq_vmware(void)
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{
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char hv_sig[13];
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u_int regs[4];
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char *p;
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u_int hv_high;
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int i;
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/*
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* [RFC] CPUID usage for interaction between Hypervisors and Linux.
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* http://lkml.org/lkml/2008/10/1/246
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*
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* KB1009458: Mechanisms to determine if software is running in
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* a VMware virtual machine
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* http://kb.vmware.com/kb/1009458
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*/
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hv_high = 0;
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if ((cpu_feature2 & CPUID2_HV) != 0) {
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do_cpuid(0x40000000, regs);
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hv_high = regs[0];
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for (i = 1, p = hv_sig; i < 4; i++, p += sizeof(regs) / 4)
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memcpy(p, ®s[i], sizeof(regs[i]));
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*p = '\0';
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if (bootverbose) {
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/*
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* HV vendor ID string
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* ------------+--------------
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* KVM "KVMKVMKVM"
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* Microsoft "Microsoft Hv"
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* VMware "VMwareVMware"
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* Xen "XenVMMXenVMM"
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*/
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printf("Hypervisor: Origin = \"%s\"\n", hv_sig);
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}
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if (strncmp(hv_sig, "VMwareVMware", 12) != 0)
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return (0);
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} else {
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p = kern_getenv("smbios.system.serial");
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if (p == NULL)
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return (0);
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if (strncmp(p, "VMware-", 7) != 0 &&
|
||||
strncmp(p, "VMW", 3) != 0) {
|
||||
freeenv(p);
|
||||
return (0);
|
||||
}
|
||||
freeenv(p);
|
||||
vmware_hvcall(VMW_HVCMD_GETVERSION, regs);
|
||||
if (regs[1] != VMW_HVMAGIC)
|
||||
return (0);
|
||||
}
|
||||
if (hv_high >= 0x40000010) {
|
||||
do_cpuid(0x40000010, regs);
|
||||
tsc_freq = regs[0] * 1000;
|
||||
|
|
@ -177,7 +117,6 @@ tsc_freq_vmware(void)
|
|||
tsc_freq = regs[0] | ((uint64_t)regs[1] << 32);
|
||||
}
|
||||
tsc_is_invariant = 1;
|
||||
return (1);
|
||||
}
|
||||
|
||||
static void
|
||||
|
|
@ -261,8 +200,10 @@ probe_tsc_freq(void)
|
|||
}
|
||||
}
|
||||
|
||||
if (tsc_freq_vmware())
|
||||
if (vm_guest == VM_GUEST_VMWARE) {
|
||||
tsc_freq_vmware();
|
||||
return;
|
||||
}
|
||||
|
||||
switch (cpu_vendor_id) {
|
||||
case CPU_VENDOR_AMD:
|
||||
|
|
|
|||
Loading…
Reference in a new issue