C++ (Cpp) hypercall_xen_version Examples

Example #1

File: hvmloader.c Project: CPFL/xen

static void init_hypercalls(void)
{
    uint32_t eax, ebx, ecx, edx;
    unsigned long i;
    char signature[13];
    xen_extraversion_t extraversion;
    uint32_t base;

    for ( base = 0x40000000; base < 0x40010000; base += 0x100 )
    {
        cpuid(base, &eax, &ebx, &ecx, &edx);

        *(uint32_t *)(signature + 0) = ebx;
        *(uint32_t *)(signature + 4) = ecx;
        *(uint32_t *)(signature + 8) = edx;
        signature[12] = '\0';

        if ( !strcmp("XenVMMXenVMM", signature) )
            break;
    }

    BUG_ON(strcmp("XenVMMXenVMM", signature) || ((eax - base) < 2));

    /* Fill in hypercall transfer pages. */
    cpuid(base + 2, &eax, &ebx, &ecx, &edx);
    for ( i = 0; i < eax; i++ )
        wrmsr(ebx, HYPERCALL_PHYSICAL_ADDRESS + (i << 12) + i);

    /* Print version information. */
    cpuid(base + 1, &eax, &ebx, &ecx, &edx);
    hypercall_xen_version(XENVER_extraversion, extraversion);
    printf("Detected Xen v%u.%u%s\n", eax >> 16, eax & 0xffff, extraversion);
}

Example #2

File: xen.c Project: OpenXT-Extras/seabios

/* Fill in hypercall transfer pages. */
void xen_hypercall_setup(void)
{
    u32 eax, ebx, ecx, edx;
    xen_extraversion_t extraversion;
    unsigned long i;

    if (!runningOnXen())
        return;

    cpuid(xen_cpuid_base + 2, &eax, &ebx, &ecx, &edx);

    xen_hypercall_page = (unsigned long)memalign_high(PAGE_SIZE, eax*PAGE_SIZE);
    if (!xen_hypercall_page)
        panic("unable to allocate Xen hypercall page\n");

    dprintf(1, "Allocated Xen hypercall page at %lx\n", xen_hypercall_page);
    for ( i = 0; i < eax; i++ )
        wrmsr(ebx, xen_hypercall_page + (i << 12) + i);

    /* Print version information. */
    cpuid(xen_cpuid_base + 1, &eax, &ebx, &ecx, &edx);
    hypercall_xen_version(XENVER_extraversion, extraversion);
    dprintf(1, "Detected Xen v%u.%u%s\n", eax >> 16, eax & 0xffff, extraversion);
}