diff options
Diffstat (limited to 'src/shared/virt.c')
| -rw-r--r-- | src/shared/virt.c | 224 |
1 files changed, 0 insertions, 224 deletions
diff --git a/src/shared/virt.c b/src/shared/virt.c index 2144341e83..92ca4ec883 100644 --- a/src/shared/virt.c +++ b/src/shared/virt.c @@ -27,230 +27,6 @@ #include "virt.h" #include "fileio.h" -#if 0 -static int detect_vm_cpuid(const char **_id) { - - /* Both CPUID and DMI are x86 specific interfaces... */ -#if defined(__i386__) || defined(__x86_64__) - - static const char cpuid_vendor_table[] = - "XenVMMXenVMM\0" "xen\0" - "KVMKVMKVM\0" "kvm\0" - /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ - "VMwareVMware\0" "vmware\0" - /* http://msdn.microsoft.com/en-us/library/ff542428.aspx */ - "Microsoft Hv\0" "microsoft\0"; - - uint32_t eax, ecx; - union { - uint32_t sig32[3]; - char text[13]; - } sig = {}; - const char *j, *k; - bool hypervisor; - - /* http://lwn.net/Articles/301888/ */ - -#if defined (__i386__) -#define REG_a "eax" -#define REG_b "ebx" -#elif defined (__amd64__) -#define REG_a "rax" -#define REG_b "rbx" -#endif - - /* First detect whether there is a hypervisor */ - eax = 1; - __asm__ __volatile__ ( - /* ebx/rbx is being used for PIC! */ - " push %%"REG_b" \n\t" - " cpuid \n\t" - " pop %%"REG_b" \n\t" - - : "=a" (eax), "=c" (ecx) - : "0" (eax) - ); - - hypervisor = !!(ecx & 0x80000000U); - - if (hypervisor) { - - /* There is a hypervisor, see what it is */ - eax = 0x40000000U; - __asm__ __volatile__ ( - /* ebx/rbx is being used for PIC! */ - " push %%"REG_b" \n\t" - " cpuid \n\t" - " mov %%ebx, %1 \n\t" - " pop %%"REG_b" \n\t" - - : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2]) - : "0" (eax) - ); - - NULSTR_FOREACH_PAIR(j, k, cpuid_vendor_table) - if (streq(sig.text, j)) { - *_id = k; - return 1; - } - - *_id = "other"; - return 0; - } -#endif - - return 0; -} - -static int detect_vm_dmi(const char **_id) { - - /* Both CPUID and DMI are x86 specific interfaces... */ -#if defined(__i386__) || defined(__x86_64__) - - static const char *const dmi_vendors[] = { - "/sys/class/dmi/id/sys_vendor", - "/sys/class/dmi/id/board_vendor", - "/sys/class/dmi/id/bios_vendor" - }; - - static const char dmi_vendor_table[] = - "QEMU\0" "qemu\0" - /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */ - "VMware\0" "vmware\0" - "VMW\0" "vmware\0" - "innotek GmbH\0" "oracle\0" - "Xen\0" "xen\0" - "Bochs\0" "bochs\0"; - unsigned i; - - for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) { - _cleanup_free_ char *s = NULL; - const char *j, *k; - int r; - - r = read_one_line_file(dmi_vendors[i], &s); - if (r < 0) { - if (r != -ENOENT) - return r; - - continue; - } - - NULSTR_FOREACH_PAIR(j, k, dmi_vendor_table) - if (startswith(s, j)) { - *_id = k; - return 1; - } - } -#endif - - return 0; -} - -/* Returns a short identifier for the various VM implementations */ -int detect_vm(const char **id) { - _cleanup_free_ char *domcap = NULL, *cpuinfo_contents = NULL; - static thread_local int cached_found = -1; - static thread_local const char *cached_id = NULL; - const char *_id = NULL; - int r; - - if (_likely_(cached_found >= 0)) { - - if (id) - *id = cached_id; - - return cached_found; - } - - /* Try xen capabilities file first, if not found try high-level hypervisor sysfs file: - * - * https://bugs.freedesktop.org/show_bug.cgi?id=77271 */ - r = read_one_line_file("/proc/xen/capabilities", &domcap); - if (r >= 0) { - char *cap, *i = domcap; - - while ((cap = strsep(&i, ","))) - if (streq(cap, "control_d")) - break; - - if (!cap) { - _id = "xen"; - r = 1; - } - - goto finish; - - } else if (r == -ENOENT) { - _cleanup_free_ char *hvtype = NULL; - - r = read_one_line_file("/sys/hypervisor/type", &hvtype); - if (r >= 0) { - if (streq(hvtype, "xen")) { - _id = "xen"; - r = 1; - goto finish; - } - } else if (r != -ENOENT) - return r; - } else - return r; - - /* this will set _id to "other" and return 0 for unknown hypervisors */ - r = detect_vm_cpuid(&_id); - if (r != 0) - goto finish; - - r = detect_vm_dmi(&_id); - if (r != 0) - goto finish; - - if (_id) { - /* "other" */ - r = 1; - goto finish; - } - - /* Detect User-Mode Linux by reading /proc/cpuinfo */ - r = read_full_file("/proc/cpuinfo", &cpuinfo_contents, NULL); - if (r < 0) - return r; - if (strstr(cpuinfo_contents, "\nvendor_id\t: User Mode Linux\n")) { - _id = "uml"; - r = 1; - goto finish; - } - -#if defined(__s390__) - { - _cleanup_free_ char *t = NULL; - - r = get_status_field("/proc/sysinfo", "VM00 Control Program:", &t); - if (r >= 0) { - if (streq(t, "z/VM")) - _id = "zvm"; - else - _id = "kvm"; - r = 1; - - goto finish; - } - } -#endif - - r = 0; - -finish: - cached_found = r; - - cached_id = _id; - if (id) - *id = _id; - - return r; -} -#endif - int detect_container(const char **id) { static thread_local int cached_found = -1; |