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libvirt/src/libxl/libxl_capabilities.c
Jiri Denemark a62dca833e cpu: Drop unused parameter from cpuDecode 
The "preferred" parameter is not used by any caller of cpuDecode
anymore. It's only used internally in cpu_x86 to implement cpuBaseline.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: John Ferlan <jferlan@redhat.com>
2017-10-16 09:21:52 +02:00

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/*
* libxl_capabilities.c: libxl capabilities generation
*
* Copyright (C) 2016 SUSE LINUX Products GmbH, Nuernberg, Germany.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Jim Fehlig <jfehlig@suse.com>
*/
#include <config.h>
#include <libxl.h>
#include <regex.h>
#include "internal.h"
#include "virlog.h"
#include "virerror.h"
#include "virfile.h"
#include "viralloc.h"
#include "virstring.h"
#include "domain_conf.h"
#include "capabilities.h"
#include "domain_capabilities.h"
#include "vircommand.h"
#include "libxl_capabilities.h"
#include "cpu/cpu_x86.h"
#include "cpu/cpu_x86_data.h"
#define VIR_FROM_THIS VIR_FROM_LIBXL
VIR_LOG_INIT("libxl.libxl_capabilities");
/* see xen-unstable.hg/xen/include/asm-x86/cpufeature.h */
#define LIBXL_X86_FEATURE_PAE_MASK (1 << 6)
#define LIBXL_X86_FEATURE_LM_MASK (1 << 29)
enum libxlHwcapVersion {
LIBXL_HWCAP_V0 = 0, /* for Xen 4.4 .. 4.6 */
LIBXL_HWCAP_V1, /* for Xen 4.7 and up */
};
struct guest_arch {
virArch arch;
int bits;
int hvm;
int pae;
int nonpae;
int ia64_be;
};
#define XEN_CAP_REGEX "(xen|hvm)-[[:digit:]]+\\.[[:digit:]]+-(aarch64|armv7l|x86_32|x86_64|ia64|powerpc64)(p|be)?"
static int
libxlCapsAddCPUID(virCPUDataPtr data, virCPUx86CPUID *cpuid, ssize_t ncaps)
{
size_t i;
for (i = 0; i < ncaps; i++) {
virCPUx86CPUID *c = &cpuid[i];
if (virCPUx86DataAddCPUID(data, c) < 0) {
VIR_DEBUG("Failed to add CPUID(%x,%x)", c->eax_in, c->ecx_in);
return -1;
}
}
return 0;
}
/*
* The words represented in physinfo.hw_cap are host CPUID (sub) leafs.
* Position of these hasn't changed much up until Xen 4.7 with a rework
* on how CPUID is handled internally. As a side-effect it got normalized
* and also added more feature words. Although cannot be relied upon as
* stable interface, and hence we version changes in position of the features
* across all supported versions of the libxl driver until libxl exposes a
* stable representation of these capabilities. Fortunately not a lot of
* variation happened so it's still trivial to keep track of these leafs
* to describe host CPU in libvirt capabilities. v0 stands for Xen 4.4
* up to 4.6, while v1 is meant for Xen 4.7, as depicted in the table below:
*
* | v0 (Xen 4.4 - 4.6) | v1 (Xen >= 4.7) |
* ---------------------------------------------
* word 0 | CPUID.00000001.EDX | CPUID.00000001.EDX |
* word 1 | CPUID.80000001.EDX | CPUID.00000001.ECX |
* word 2 | CPUID.80860001 | CPUID.80000001.EDX |
* word 3 | - Linux - | CPUID.80000001.ECX |
* word 4 | CPUID.00000001.ECX | CPUID.0000000D:1.EAX |
* word 5 | CPUID.C0000001 | CPUID.00000007:0.EBX |
* word 6 | CPUID.80000001.ECX | CPUID.00000007:0.ECX |
* word 7 | CPUID.00000007.EBX | CPUID.80000007.EDX |
* word 8 | - Non existent - | CPUID.80000008.EBX |
*
*/
static virCPUDataPtr
libxlCapsNodeData(virCPUDefPtr cpu, libxl_hwcap hwcap,
enum libxlHwcapVersion version)
{
ssize_t ncaps;
virCPUDataPtr cpudata = NULL;
virCPUx86CPUID cpuid[] = {
{ .eax_in = 0x00000001,
.edx = hwcap[0] },
{ .eax_in = 0x00000001,
.ecx = (version > LIBXL_HWCAP_V0 ? hwcap[1] : hwcap[4]) },
{ .eax_in = 0x80000001,
.edx = (version > LIBXL_HWCAP_V0 ? hwcap[2] : hwcap[1]) },
{ .eax_in = 0x80000001,
.ecx = (version > LIBXL_HWCAP_V0 ? hwcap[3] : hwcap[6]) },
{ .eax_in = 0x00000007,
.ebx = (version > LIBXL_HWCAP_V0 ? hwcap[5] : hwcap[7]) },
};
virCPUx86CPUID cpuid_ver1[] = {
{ .eax_in = 0x0000000D, .ecx_in = 1U, .eax = hwcap[4] },
{ .eax_in = 0x00000007, .ecx_in = 0U, .ecx = hwcap[6] },
{ .eax_in = 0x80000007, .ecx_in = 0U, .edx = hwcap[7] },
};
if (!(cpudata = virCPUDataNew(cpu->arch)))
goto error;
ncaps = ARRAY_CARDINALITY(cpuid);
if (libxlCapsAddCPUID(cpudata, cpuid, ncaps) < 0)
goto error;
ncaps = ARRAY_CARDINALITY(cpuid_ver1);
if (version > LIBXL_HWCAP_V0 &&
libxlCapsAddCPUID(cpudata, cpuid_ver1, ncaps) < 0)
goto error;
return cpudata;
error:
virCPUDataFree(cpudata);
return NULL;
}
/* hw_caps is an array of 32-bit words whose meaning is listed in
* xen-unstable.hg/xen/include/asm-x86/cpufeature.h. Each feature
* is defined in the form X*32+Y, corresponding to the Y'th bit in
* the X'th 32-bit word of hw_cap.
*/
static int
libxlCapsInitCPU(virCapsPtr caps, libxl_physinfo *phy_info,
enum libxlHwcapVersion version)
{
virCPUDataPtr data = NULL;
virCPUDefPtr cpu = NULL;
int ret = -1;
int host_pae;
int host_lm;
/* On ARM hw_cap vector is zeroed out but not on x86 */
if (!phy_info->hw_cap[0])
return 0;
if (VIR_ALLOC(cpu) < 0)
goto error;
host_pae = phy_info->hw_cap[0] & LIBXL_X86_FEATURE_PAE_MASK;
if (host_pae &&
virCapabilitiesAddHostFeature(caps, "pae") < 0)
goto error;
host_lm = (phy_info->hw_cap[version > LIBXL_HWCAP_V0 ? 2 : 1]
& LIBXL_X86_FEATURE_LM_MASK);
if (host_lm)
cpu->arch = VIR_ARCH_X86_64;
else
cpu->arch = VIR_ARCH_I686;
cpu->type = VIR_CPU_TYPE_HOST;
cpu->cores = phy_info->cores_per_socket;
cpu->threads = phy_info->threads_per_core;
cpu->sockets = phy_info->nr_cpus / (cpu->cores * cpu->threads);
caps->host.cpu = cpu;
ret = 0;
if (!(data = libxlCapsNodeData(cpu, phy_info->hw_cap, version)) ||
cpuDecode(cpu, data, NULL) < 0) {
VIR_WARN("Failed to initialize host cpu features");
goto error;
}
cleanup:
virCPUDataFree(data);
return ret;
error:
virCPUDefFree(cpu);
goto cleanup;
}
static int
libxlCapsInitHost(libxl_ctx *ctx, virCapsPtr caps)
{
const libxl_version_info *ver_info;
enum libxlHwcapVersion version;
libxl_physinfo phy_info;
int ret = -1;
libxl_physinfo_init(&phy_info);
if (libxl_get_physinfo(ctx, &phy_info) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get node physical info from libxenlight"));
goto cleanup;
}
if ((ver_info = libxl_get_version_info(ctx)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get version info from libxenlight"));
goto cleanup;
}
version = (ver_info->xen_version_minor >= 7);
if (libxlCapsInitCPU(caps, &phy_info, version) < 0)
goto cleanup;
if (virCapabilitiesSetNetPrefix(caps, LIBXL_GENERATED_PREFIX_XEN) < 0)
goto cleanup;
ret = 0;
cleanup:
libxl_physinfo_dispose(&phy_info);
return ret;
}
static int
libxlCapsInitNuma(libxl_ctx *ctx, virCapsPtr caps)
{
libxl_numainfo *numa_info = NULL;
libxl_cputopology *cpu_topo = NULL;
int nr_nodes = 0, nr_cpus = 0, nr_siblings = 0;
virCapsHostNUMACellCPUPtr *cpus = NULL;
virCapsHostNUMACellSiblingInfoPtr siblings = NULL;
int *nr_cpus_node = NULL;
size_t i;
int ret = -1;
/* Let's try to fetch all the topology information */
numa_info = libxl_get_numainfo(ctx, &nr_nodes);
if (numa_info == NULL || nr_nodes == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("libxl_get_numainfo failed"));
goto cleanup;
} else {
cpu_topo = libxl_get_cpu_topology(ctx, &nr_cpus);
if (cpu_topo == NULL || nr_cpus == 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("libxl_get_cpu_topology failed"));
goto cleanup;
}
}
if (VIR_ALLOC_N(cpus, nr_nodes) < 0)
goto cleanup;
if (VIR_ALLOC_N(nr_cpus_node, nr_nodes) < 0)
goto cleanup;
/* For each node, prepare a list of CPUs belonging to that node */
for (i = 0; i < nr_cpus; i++) {
int node = cpu_topo[i].node;
if (cpu_topo[i].core == LIBXL_CPUTOPOLOGY_INVALID_ENTRY)
continue;
nr_cpus_node[node]++;
if (nr_cpus_node[node] == 1) {
if (VIR_ALLOC(cpus[node]) < 0)
goto cleanup;
} else {
if (VIR_REALLOC_N(cpus[node], nr_cpus_node[node]) < 0)
goto cleanup;
}
/* Mapping between what libxl tells and what libvirt wants */
cpus[node][nr_cpus_node[node]-1].id = i;
cpus[node][nr_cpus_node[node]-1].socket_id = cpu_topo[i].socket;
cpus[node][nr_cpus_node[node]-1].core_id = cpu_topo[i].core;
/* Allocate the siblings maps. We will be filling them later */
cpus[node][nr_cpus_node[node]-1].siblings = virBitmapNew(nr_cpus);
if (!cpus[node][nr_cpus_node[node]-1].siblings) {
virReportOOMError();
goto cleanup;
}
}
/* Let's now populate the siblings bitmaps */
for (i = 0; i < nr_cpus; i++) {
int node = cpu_topo[i].node;
size_t j;
if (cpu_topo[i].core == LIBXL_CPUTOPOLOGY_INVALID_ENTRY)
continue;
for (j = 0; j < nr_cpus_node[node]; j++) {
if (cpus[node][j].socket_id == cpu_topo[i].socket &&
cpus[node][j].core_id == cpu_topo[i].core)
ignore_value(virBitmapSetBit(cpus[node][j].siblings, i));
}
}
for (i = 0; i < nr_nodes; i++) {
if (numa_info[i].size == LIBXL_NUMAINFO_INVALID_ENTRY)
continue;
nr_siblings = numa_info[i].num_dists;
if (nr_siblings) {
size_t j;
if (VIR_ALLOC_N(siblings, nr_siblings) < 0)
goto cleanup;
for (j = 0; j < nr_siblings; j++) {
siblings[j].node = j;
siblings[j].distance = numa_info[i].dists[j];
}
}
if (virCapabilitiesAddHostNUMACell(caps, i,
numa_info[i].size / 1024,
nr_cpus_node[i], cpus[i],
nr_siblings, siblings,
0, NULL) < 0) {
virCapabilitiesClearHostNUMACellCPUTopology(cpus[i],
nr_cpus_node[i]);
goto cleanup;
}
/* This is safe, as the CPU list is now stored in the NUMA cell */
cpus[i] = NULL;
}
ret = 0;
cleanup:
if (ret != 0) {
for (i = 0; cpus && i < nr_nodes; i++)
VIR_FREE(cpus[i]);
virCapabilitiesFreeNUMAInfo(caps);
VIR_FREE(siblings);
}
VIR_FREE(cpus);
VIR_FREE(nr_cpus_node);
libxl_cputopology_list_free(cpu_topo, nr_cpus);
libxl_numainfo_list_free(numa_info, nr_nodes);
return ret;
}
static int
libxlCapsInitGuests(libxl_ctx *ctx, virCapsPtr caps)
{
const libxl_version_info *ver_info;
int err;
regex_t regex;
char *str, *token;
regmatch_t subs[4];
char *saveptr = NULL;
size_t i;
struct guest_arch guest_archs[32];
int nr_guest_archs = 0;
memset(guest_archs, 0, sizeof(guest_archs));
if ((ver_info = libxl_get_version_info(ctx)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get version info from libxenlight"));
return -1;
}
if (!ver_info->capabilities) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Failed to get capabilities from libxenlight"));
return -1;
}
err = regcomp(&regex, XEN_CAP_REGEX, REG_EXTENDED);
if (err != 0) {
char error[100];
regerror(err, &regex, error, sizeof(error));
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Failed to compile regex %s"), error);
return -1;
}
/* Format of capabilities string is documented in the code in
* xen-unstable.hg/xen/arch/.../setup.c.
*
* It is a space-separated list of supported guest architectures.
*
* For x86:
* TYP-VER-ARCH[p]
* ^ ^ ^ ^
* | | | +-- PAE supported
* | | +------- x86_32 or x86_64
* | +----------- the version of Xen, eg. "3.0"
* +--------------- "xen" or "hvm" for para or full virt respectively
*
* For IA64:
* TYP-VER-ARCH[be]
* ^ ^ ^ ^
* | | | +-- Big-endian supported
* | | +------- always "ia64"
* | +----------- the version of Xen, eg. "3.0"
* +--------------- "xen" or "hvm" for para or full virt respectively
*/
/* Split capabilities string into tokens. strtok_r is OK here because
* we "own" the buffer. Parse out the features from each token.
*/
for (str = ver_info->capabilities, nr_guest_archs = 0;
nr_guest_archs < sizeof(guest_archs) / sizeof(guest_archs[0])
&& (token = strtok_r(str, " ", &saveptr)) != NULL;
str = NULL) {
if (regexec(&regex, token, sizeof(subs) / sizeof(subs[0]),
subs, 0) == 0) {
int hvm = STRPREFIX(&token[subs[1].rm_so], "hvm");
virArch arch;
int pae = 0, nonpae = 0, ia64_be = 0;
if (STRPREFIX(&token[subs[2].rm_so], "x86_32")) {
arch = VIR_ARCH_I686;
if (subs[3].rm_so != -1 &&
STRPREFIX(&token[subs[3].rm_so], "p"))
pae = 1;
else
nonpae = 1;
} else if (STRPREFIX(&token[subs[2].rm_so], "x86_64")) {
arch = VIR_ARCH_X86_64;
} else if (STRPREFIX(&token[subs[2].rm_so], "ia64")) {
arch = VIR_ARCH_ITANIUM;
if (subs[3].rm_so != -1 &&
STRPREFIX(&token[subs[3].rm_so], "be"))
ia64_be = 1;
} else if (STRPREFIX(&token[subs[2].rm_so], "powerpc64")) {
arch = VIR_ARCH_PPC64;
} else if (STRPREFIX(&token[subs[2].rm_so], "armv7l")) {
arch = VIR_ARCH_ARMV7L;
} else if (STRPREFIX(&token[subs[2].rm_so], "aarch64")) {
arch = VIR_ARCH_AARCH64;
} else {
continue;
}
/* Search for existing matching (model,hvm) tuple */
for (i = 0; i < nr_guest_archs; i++) {
if ((guest_archs[i].arch == arch) &&
guest_archs[i].hvm == hvm)
break;
}
/* Too many arch flavours - highly unlikely ! */
if (i >= ARRAY_CARDINALITY(guest_archs))
continue;
/* Didn't find a match, so create a new one */
if (i == nr_guest_archs)
nr_guest_archs++;
guest_archs[i].arch = arch;
guest_archs[i].hvm = hvm;
/* Careful not to overwrite a previous positive
setting with a negative one here - some archs
can do both pae & non-pae, but Xen reports
separately capabilities so we're merging archs */
if (pae)
guest_archs[i].pae = pae;
if (nonpae)
guest_archs[i].nonpae = nonpae;
if (ia64_be)
guest_archs[i].ia64_be = ia64_be;
}
}
regfree(&regex);
for (i = 0; i < nr_guest_archs; ++i) {
virCapsGuestPtr guest;
char const *const xen_machines[] = {guest_archs[i].hvm ? "xenfv" : "xenpv"};
virCapsGuestMachinePtr *machines;
if ((machines = virCapabilitiesAllocMachines(xen_machines, 1)) == NULL)
return -1;
if ((guest = virCapabilitiesAddGuest(caps,
guest_archs[i].hvm ? VIR_DOMAIN_OSTYPE_HVM : VIR_DOMAIN_OSTYPE_XEN,
guest_archs[i].arch,
LIBXL_EXECBIN_DIR "/qemu-system-i386",
(guest_archs[i].hvm ?
LIBXL_FIRMWARE_DIR "/hvmloader" :
NULL),
1,
machines)) == NULL) {
virCapabilitiesFreeMachines(machines, 1);
return -1;
}
machines = NULL;
if (virCapabilitiesAddGuestDomain(guest,
VIR_DOMAIN_VIRT_XEN,
NULL,
NULL,
0,
NULL) == NULL)
return -1;
if (guest_archs[i].pae &&
virCapabilitiesAddGuestFeature(guest,
"pae",
1,
0) == NULL)
return -1;
if (guest_archs[i].nonpae &&
virCapabilitiesAddGuestFeature(guest,
"nonpae",
1,
0) == NULL)
return -1;
if (guest_archs[i].ia64_be &&
virCapabilitiesAddGuestFeature(guest,
"ia64_be",
1,
0) == NULL)
return -1;
if (guest_archs[i].hvm) {
if (virCapabilitiesAddGuestFeature(guest,
"acpi",
1,
1) == NULL)
return -1;
if (virCapabilitiesAddGuestFeature(guest, "apic",
1,
0) == NULL)
return -1;
if (virCapabilitiesAddGuestFeature(guest,
"hap",
1,
1) == NULL)
return -1;
}
}
return 0;
}
static int
libxlMakeDomainOSCaps(const char *machine,
virDomainCapsOSPtr os,
virFirmwarePtr *firmwares,
size_t nfirmwares)
{
virDomainCapsLoaderPtr capsLoader = &os->loader;
size_t i;
os->supported = true;
if (STREQ(machine, "xenpv"))
return 0;
capsLoader->supported = true;
if (VIR_ALLOC_N(capsLoader->values.values, nfirmwares) < 0)
return -1;
for (i = 0; i < nfirmwares; i++) {
if (VIR_STRDUP(capsLoader->values.values[capsLoader->values.nvalues],
firmwares[i]->name) < 0)
return -1;
capsLoader->values.nvalues++;
}
VIR_DOMAIN_CAPS_ENUM_SET(capsLoader->type,
VIR_DOMAIN_LOADER_TYPE_ROM,
VIR_DOMAIN_LOADER_TYPE_PFLASH);
VIR_DOMAIN_CAPS_ENUM_SET(capsLoader->readonly,
VIR_TRISTATE_BOOL_YES);
return 0;
}
static int
libxlMakeDomainDeviceDiskCaps(virDomainCapsDeviceDiskPtr dev)
{
dev->supported = true;
VIR_DOMAIN_CAPS_ENUM_SET(dev->diskDevice,
VIR_DOMAIN_DISK_DEVICE_DISK,
VIR_DOMAIN_DISK_DEVICE_CDROM);
VIR_DOMAIN_CAPS_ENUM_SET(dev->bus,
VIR_DOMAIN_DISK_BUS_IDE,
VIR_DOMAIN_DISK_BUS_SCSI,
VIR_DOMAIN_DISK_BUS_XEN);
return 0;
}
static int
libxlMakeDomainDeviceGraphicsCaps(virDomainCapsDeviceGraphicsPtr dev)
{
dev->supported = true;
VIR_DOMAIN_CAPS_ENUM_SET(dev->type,
VIR_DOMAIN_GRAPHICS_TYPE_SDL,
VIR_DOMAIN_GRAPHICS_TYPE_VNC,
VIR_DOMAIN_GRAPHICS_TYPE_SPICE);
return 0;
}
static int
libxlMakeDomainDeviceVideoCaps(virDomainCapsDeviceVideoPtr dev)
{
dev->supported = true;
VIR_DOMAIN_CAPS_ENUM_SET(dev->modelType,
VIR_DOMAIN_VIDEO_TYPE_VGA,
VIR_DOMAIN_VIDEO_TYPE_CIRRUS,
VIR_DOMAIN_VIDEO_TYPE_XEN);
return 0;
}
static int
libxlMakeDomainDeviceHostdevCaps(virDomainCapsDeviceHostdevPtr dev)
{
dev->supported = true;
/* VIR_DOMAIN_HOSTDEV_MODE_CAPABILITIES is for containers only */
VIR_DOMAIN_CAPS_ENUM_SET(dev->mode,
VIR_DOMAIN_HOSTDEV_MODE_SUBSYS);
VIR_DOMAIN_CAPS_ENUM_SET(dev->startupPolicy,
VIR_DOMAIN_STARTUP_POLICY_DEFAULT,
VIR_DOMAIN_STARTUP_POLICY_MANDATORY,
VIR_DOMAIN_STARTUP_POLICY_REQUISITE,
VIR_DOMAIN_STARTUP_POLICY_OPTIONAL);
VIR_DOMAIN_CAPS_ENUM_SET(dev->subsysType,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI);
#ifdef LIBXL_HAVE_PVUSB
VIR_DOMAIN_CAPS_ENUM_SET(dev->subsysType,
VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB);
#endif
/* No virDomainHostdevCapsType for libxl */
virDomainCapsEnumClear(&dev->capsType);
virDomainCapsEnumClear(&dev->pciBackend);
VIR_DOMAIN_CAPS_ENUM_SET(dev->pciBackend,
VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN);
return 0;
}
virCapsPtr
libxlMakeCapabilities(libxl_ctx *ctx)
{
virCapsPtr caps;
#ifdef LIBXL_HAVE_NO_SUSPEND_RESUME
if ((caps = virCapabilitiesNew(virArchFromHost(), false, false)) == NULL)
#else
if ((caps = virCapabilitiesNew(virArchFromHost(), true, true)) == NULL)
#endif
return NULL;
if (libxlCapsInitHost(ctx, caps) < 0)
goto error;
if (libxlCapsInitNuma(ctx, caps) < 0)
goto error;
if (libxlCapsInitGuests(ctx, caps) < 0)
goto error;
return caps;
error:
virObjectUnref(caps);
return NULL;
}
/*
* Currently Xen has no interface to report maxvcpus supported
* for the various domain types (PV, HVM, PVH). HVM_MAX_VCPUS
* is defined in $xensrc/xen/include/public/hvm/hvm_info_table.h
* PV has no equivalent and is relunctantly set here until Xen
* can report such capabilities.
*/
#define HVM_MAX_VCPUS 128
#define PV_MAX_VCPUS 512
int
libxlMakeDomainCapabilities(virDomainCapsPtr domCaps,
virFirmwarePtr *firmwares,
size_t nfirmwares)
{
virDomainCapsOSPtr os = &domCaps->os;
virDomainCapsDeviceDiskPtr disk = &domCaps->disk;
virDomainCapsDeviceGraphicsPtr graphics = &domCaps->graphics;
virDomainCapsDeviceVideoPtr video = &domCaps->video;
virDomainCapsDeviceHostdevPtr hostdev = &domCaps->hostdev;
if (STREQ(domCaps->machine, "xenfv"))
domCaps->maxvcpus = HVM_MAX_VCPUS;
else
domCaps->maxvcpus = PV_MAX_VCPUS;
if (libxlMakeDomainOSCaps(domCaps->machine, os, firmwares, nfirmwares) < 0 ||
libxlMakeDomainDeviceDiskCaps(disk) < 0 ||
libxlMakeDomainDeviceGraphicsCaps(graphics) < 0 ||
libxlMakeDomainDeviceVideoCaps(video) < 0 ||
libxlMakeDomainDeviceHostdevCaps(hostdev) < 0)
return -1;
return 0;
}
#define LIBXL_QEMU_DM_STR "Options specific to the Xen version:"
int
libxlDomainGetEmulatorType(const virDomainDef *def)
{
int ret = LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN;
virCommandPtr cmd = NULL;
char *output = NULL;
if (def->os.type == VIR_DOMAIN_OSTYPE_HVM) {
if (def->emulator) {
if (!virFileExists(def->emulator))
goto cleanup;
cmd = virCommandNew(def->emulator);
virCommandAddArgList(cmd, "-help", NULL);
virCommandSetOutputBuffer(cmd, &output);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
if (strstr(output, LIBXL_QEMU_DM_STR))
ret = LIBXL_DEVICE_MODEL_VERSION_QEMU_XEN_TRADITIONAL;
}
}
cleanup:
VIR_FREE(output);
virCommandFree(cmd);
return ret;
}
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