[libvirt] [PATCH v5 2/6] libxl: add support for PVH
Marek Marczykowski-Górecki
marmarek at invisiblethingslab.com
Mon Nov 26 19:34:37 UTC 2018
Since this is something between PV and HVM, it makes sense to put the
setting in place where domain type is specified.
To enable it, use <os><type machine="xenpvh">...</type></os>. It is
also included in capabilities.xml, for every supported HVM guest type - it
doesn't seems to be any other requirement (besides new enough Xen).
Signed-off-by: Marek Marczykowski-Górecki <marmarek at invisiblethingslab.com>
---
Changes in v2 proposed by Jim:
- use new_arch_added var instead of i == nr_guest_archs for clarity
- improve comment
- adjust for now required Xen >= 4.6 (remove part for Xen < 4.5)
Changes in v3:
- limit VIR_DOMAIN_OSTYPE_XEN -> VIR_DOMAIN_OSTYPE_LINUX conversion to
Xen PV only
- do not accept VIR_DOMAIN_OSTYPE_LINUX for PVH
- fix reported capabilities for PVH - remove hostdev passthrough and
video/graphics
- use #ifdef LIBXL_DOMAIN_TYPE_PVH instead of hypervisor version to
check for PVH support
- compile fix for Xen < 4.9
Changes in v4:
- revert to "i == nr_guest_archs-1" check
- let configure check for LIBXL_DOMAIN_TYPE_PVH and use #ifdef
HAVE_XEN_PVH then
- fix comment about Xen version
Changes in v5:
- use 'xenpvh' os type
---
docs/formatcaps.html.in | 9 ++++--
docs/schemas/domaincommon.rng | 2 +-
m4/virt-driver-libxl.m4 | 3 ++-
src/conf/domain_conf.c | 10 ++++---
src/conf/domain_conf.h | 1 +-
src/libxl/libxl_capabilities.c | 38 +++++++++++++++++++++++---
src/libxl/libxl_conf.c | 52 ++++++++++++++++++++++++++++++-----
src/libxl/libxl_driver.c | 6 ++--
8 files changed, 102 insertions(+), 19 deletions(-)
diff --git a/docs/formatcaps.html.in b/docs/formatcaps.html.in
index 0d9c53d..86534b2 100644
--- a/docs/formatcaps.html.in
+++ b/docs/formatcaps.html.in
@@ -74,11 +74,14 @@
is able to run. Possible values are:
<dl>
<dt><code>xen</code></dt>
- <dd>for XEN</dd>
+ <dd>for XEN PV</dd>
<dt><code>linux</code></dt>
<dd>legacy alias for <code>xen</code></dd>
+ <dt><code>xenpvh</code></dt>
+ <dd>for XEN PVH</dd>
+
<dt><code>hvm</code></dt>
<dd>Unmodified operating system</dd>
@@ -104,8 +107,8 @@
<dt><code>machine</code></dt><dd>Machine type, for use in
<a href="formatdomain.html#attributeOSTypeMachine">machine</a>
attribute of os/type element in domain XML. For example Xen
- supports <code>xenfv</code> for HVM or <code>xenpv</code> for
- PV.</dd>
+ supports <code>xenfv</code> for HVM, <code>xenpv</code> for
+ PV, or <code>xenpvh</code> for PVH.</dd>
<dt><code>domain</code></dt><dd>The <code>type</code> attribute of
this element specifies the type of hypervisor required to run the
domain. Use in <a href="formatdomain.html#attributeDomainType">type</a>
diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
index 5ee727e..9b5ffa3 100644
--- a/docs/schemas/domaincommon.rng
+++ b/docs/schemas/domaincommon.rng
@@ -341,12 +341,14 @@
<choice>
<value>xenpv</value>
<value>xenfv</value>
+ <value>xenpvh</value>
</choice>
</attribute>
</optional>
<choice>
<value>xen</value>
<value>linux</value>
+ <value>xenpvh</value>
</choice>
</element>
</define>
diff --git a/m4/virt-driver-libxl.m4 b/m4/virt-driver-libxl.m4
index 479d911..2cd97cc 100644
--- a/m4/virt-driver-libxl.m4
+++ b/m4/virt-driver-libxl.m4
@@ -75,6 +75,9 @@ AC_DEFUN([LIBVIRT_DRIVER_CHECK_LIBXL], [
])
fi
+ dnl Check if Xen has support for PVH
+ AC_CHECK_DECL(LIBXL_DOMAIN_TYPE_PVH, [AC_DEFINE([HAVE_XEN_PVH], [1], [Define to 1 if Xen has PVH support.])], [], [#include <libxl.h>])
+
AC_SUBST([LIBXL_CFLAGS])
AC_SUBST([LIBXL_LIBS])
])
diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 1387483..10bf933 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -126,7 +126,8 @@ VIR_ENUM_IMPL(virDomainOS, VIR_DOMAIN_OSTYPE_LAST,
"xen",
"linux",
"exe",
- "uml")
+ "uml",
+ "xenpvh")
VIR_ENUM_IMPL(virDomainBoot, VIR_DOMAIN_BOOT_LAST,
"fd",
@@ -12932,7 +12933,8 @@ virDomainInputDefParseXML(virDomainXMLOptionPtr xmlopt,
bus);
goto error;
}
- } else if (dom->os.type == VIR_DOMAIN_OSTYPE_XEN) {
+ } else if (dom->os.type == VIR_DOMAIN_OSTYPE_XEN ||
+ dom->os.type == VIR_DOMAIN_OSTYPE_XENPVH) {
if (def->bus != VIR_DOMAIN_INPUT_BUS_XEN) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("unsupported input bus %s"),
@@ -12981,7 +12983,8 @@ virDomainInputDefParseXML(virDomainXMLOptionPtr xmlopt,
} else {
def->bus = VIR_DOMAIN_INPUT_BUS_USB;
}
- } else if (dom->os.type == VIR_DOMAIN_OSTYPE_XEN) {
+ } else if (dom->os.type == VIR_DOMAIN_OSTYPE_XEN ||
+ dom->os.type == VIR_DOMAIN_OSTYPE_XENPVH) {
def->bus = VIR_DOMAIN_INPUT_BUS_XEN;
} else {
if ((dom->virtType == VIR_DOMAIN_VIRT_VZ ||
@@ -18770,6 +18773,7 @@ virDomainDefParseBootOptions(virDomainDefPtr def,
}
if (def->os.type == VIR_DOMAIN_OSTYPE_XEN ||
+ def->os.type == VIR_DOMAIN_OSTYPE_XENPVH ||
def->os.type == VIR_DOMAIN_OSTYPE_HVM ||
def->os.type == VIR_DOMAIN_OSTYPE_UML) {
xmlNodePtr loader_node;
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 467785c..cb56b6f 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -255,6 +255,7 @@ typedef enum {
VIR_DOMAIN_OSTYPE_LINUX,
VIR_DOMAIN_OSTYPE_EXE,
VIR_DOMAIN_OSTYPE_UML,
+ VIR_DOMAIN_OSTYPE_XENPVH,
VIR_DOMAIN_OSTYPE_LAST
} virDomainOSType;
diff --git a/src/libxl/libxl_capabilities.c b/src/libxl/libxl_capabilities.c
index 18596c7..58ec13f 100644
--- a/src/libxl/libxl_capabilities.c
+++ b/src/libxl/libxl_capabilities.c
@@ -57,6 +57,7 @@ struct guest_arch {
virArch arch;
int bits;
int hvm;
+ int pvh;
int pae;
int nonpae;
int ia64_be;
@@ -491,20 +492,44 @@ libxlCapsInitGuests(libxl_ctx *ctx, virCapsPtr caps)
guest_archs[i].nonpae = nonpae;
if (ia64_be)
guest_archs[i].ia64_be = ia64_be;
+
+ /*
+ * Xen 4.10 introduced support for the PVH guest type, which
+ * requires hardware virtualization support similar to the
+ * HVM guest type. Add a PVH guest type for each new HVM
+ * guest type.
+ */
+#ifdef HAVE_XEN_PVH
+ if (hvm && i == nr_guest_archs-1) {
+ /* Ensure we have not exhausted the guest_archs array */
+ if (nr_guest_archs >= ARRAY_CARDINALITY(guest_archs))
+ continue;
+ i = nr_guest_archs;
+ nr_guest_archs++;
+
+ guest_archs[i].arch = arch;
+ guest_archs[i].hvm = 0;
+ guest_archs[i].pvh = 1;
+ }
+#endif
}
}
regfree(®ex);
for (i = 0; i < nr_guest_archs; ++i) {
virCapsGuestPtr guest;
- char const *const xen_machines[] = {guest_archs[i].hvm ? "xenfv" : "xenpv"};
+ char const *const xen_machines[] = {
+ guest_archs[i].hvm ? "xenfv" :
+ (guest_archs[i].pvh ? "xenpvh" : "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].hvm ? VIR_DOMAIN_OSTYPE_HVM :
+ (guest_archs[i].pvh ? VIR_DOMAIN_OSTYPE_XENPVH :
+ VIR_DOMAIN_OSTYPE_XEN),
guest_archs[i].arch,
LIBXL_EXECBIN_DIR "/qemu-system-i386",
(guest_archs[i].hvm ?
@@ -557,7 +582,9 @@ libxlCapsInitGuests(libxl_ctx *ctx, virCapsPtr caps)
1,
0) == NULL)
return -1;
+ }
+ if (guest_archs[i].hvm || guest_archs[i].pvh) {
if (virCapabilitiesAddGuestFeature(guest,
"hap",
1,
@@ -580,7 +607,7 @@ libxlMakeDomainOSCaps(const char *machine,
os->supported = true;
- if (STREQ(machine, "xenpv"))
+ if (STREQ(machine, "xenpv") || STREQ(machine, "xenpvh"))
return 0;
capsLoader->supported = true;
@@ -734,9 +761,12 @@ libxlMakeDomainCapabilities(virDomainCapsPtr domCaps,
if (libxlMakeDomainOSCaps(domCaps->machine, os, firmwares, nfirmwares) < 0 ||
libxlMakeDomainDeviceDiskCaps(disk) < 0 ||
libxlMakeDomainDeviceGraphicsCaps(graphics) < 0 ||
- libxlMakeDomainDeviceVideoCaps(video) < 0 ||
+ libxlMakeDomainDeviceVideoCaps(video) < 0)
+ return -1;
+ if (STRNEQ(domCaps->machine, "xenpvh") &&
libxlMakeDomainDeviceHostdevCaps(hostdev) < 0)
return -1;
+
return 0;
}
diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
index f3da0ed..ea88032 100644
--- a/src/libxl/libxl_conf.c
+++ b/src/libxl/libxl_conf.c
@@ -133,8 +133,19 @@ libxlMakeDomCreateInfo(libxl_ctx *ctx,
libxl_domain_create_info_init(c_info);
- if (def->os.type == VIR_DOMAIN_OSTYPE_HVM) {
+ if (def->os.type == VIR_DOMAIN_OSTYPE_HVM ||
+ def->os.type == VIR_DOMAIN_OSTYPE_XENPVH) {
+#ifdef HAVE_XEN_PVH
+ c_info->type = def->os.type == VIR_DOMAIN_OSTYPE_HVM ?
+ LIBXL_DOMAIN_TYPE_HVM : LIBXL_DOMAIN_TYPE_PVH;
+#else
+ if (def->os.type == VIR_DOMAIN_OSTYPE_XENPVH) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("PVH guest os type not supported"));
+ return -1;
+ }
c_info->type = LIBXL_DOMAIN_TYPE_HVM;
+#endif
switch ((virTristateSwitch) def->features[VIR_DOMAIN_FEATURE_HAP]) {
case VIR_TRISTATE_SWITCH_OFF:
libxl_defbool_set(&c_info->hap, false);
@@ -276,16 +287,26 @@ libxlMakeDomBuildInfo(virDomainDefPtr def,
virDomainClockDef clock = def->clock;
libxl_ctx *ctx = cfg->ctx;
libxl_domain_build_info *b_info = &d_config->b_info;
- int hvm = def->os.type == VIR_DOMAIN_OSTYPE_HVM;
+ bool hvm = def->os.type == VIR_DOMAIN_OSTYPE_HVM;
+ bool pvh = def->os.type == VIR_DOMAIN_OSTYPE_XENPVH;
size_t i;
size_t nusbdevice = 0;
libxl_domain_build_info_init(b_info);
- if (hvm)
+ if (hvm) {
libxl_domain_build_info_init_type(b_info, LIBXL_DOMAIN_TYPE_HVM);
- else
+ } else if (pvh) {
+#ifdef HAVE_XEN_PVH
+ libxl_domain_build_info_init_type(b_info, LIBXL_DOMAIN_TYPE_PVH);
+#else
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("PVH guest os type not supported"));
+ return -1;
+#endif
+ } else {
libxl_domain_build_info_init_type(b_info, LIBXL_DOMAIN_TYPE_PV);
+ }
b_info->max_vcpus = virDomainDefGetVcpusMax(def);
if (libxl_cpu_bitmap_alloc(ctx, &b_info->avail_vcpus, b_info->max_vcpus))
@@ -375,7 +396,7 @@ libxlMakeDomBuildInfo(virDomainDefPtr def,
def->mem.cur_balloon = VIR_ROUND_UP(def->mem.cur_balloon, 1024);
b_info->max_memkb = virDomainDefGetMemoryInitial(def);
b_info->target_memkb = def->mem.cur_balloon;
- if (hvm) {
+ if (hvm || pvh) {
if (caps &&
def->cpu && def->cpu->mode == (VIR_CPU_MODE_HOST_PASSTHROUGH)) {
bool hasHwVirt = false;
@@ -647,6 +668,22 @@ libxlMakeDomBuildInfo(virDomainDefPtr def,
return -1;
}
#endif
+ } else if (pvh) {
+ if (VIR_STRDUP(b_info->cmdline, def->os.cmdline) < 0)
+ return -1;
+ if (VIR_STRDUP(b_info->kernel, def->os.kernel) < 0)
+ return -1;
+ if (VIR_STRDUP(b_info->ramdisk, def->os.initrd) < 0)
+ return -1;
+#ifdef LIBXL_HAVE_BUILDINFO_BOOTLOADER
+ if (VIR_STRDUP(b_info->bootloader, def->os.bootloader) < 0)
+ return -1;
+ if (def->os.bootloaderArgs) {
+ if (!(b_info->bootloader_args =
+ virStringSplit(def->os.bootloaderArgs, " \t\n", 0)))
+ return -1;
+ }
+#endif
} else {
/*
* For compatibility with the legacy xen toolstack, default to pygrub
@@ -1226,11 +1263,12 @@ libxlMakeNic(virDomainDefPtr def,
* hvm guest").
*/
if (l_nic->model) {
- if (def->os.type == VIR_DOMAIN_OSTYPE_XEN &&
+ if ((def->os.type == VIR_DOMAIN_OSTYPE_XEN ||
+ def->os.type == VIR_DOMAIN_OSTYPE_XENPVH) &&
STRNEQ(l_nic->model, "netfront")) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("only model 'netfront' is supported for "
- "Xen PV domains"));
+ "Xen PV(H) domains"));
return -1;
}
if (VIR_STRDUP(x_nic->model, l_nic->model) < 0)
diff --git a/src/libxl/libxl_driver.c b/src/libxl/libxl_driver.c
index efd47a3..5aa68a7 100644
--- a/src/libxl/libxl_driver.c
+++ b/src/libxl/libxl_driver.c
@@ -6398,9 +6398,11 @@ libxlConnectGetDomainCapabilities(virConnectPtr conn,
emulatorbin = "/usr/bin/qemu-system-x86_64";
if (machine) {
- if (STRNEQ(machine, "xenpv") && STRNEQ(machine, "xenfv")) {
+ if (STRNEQ(machine, "xenpv") &&
+ STRNEQ(machine, "xenpvh") &&
+ STRNEQ(machine, "xenfv")) {
virReportError(VIR_ERR_INVALID_ARG, "%s",
- _("Xen only supports 'xenpv' and 'xenfv' machines"));
+ _("Xen only supports 'xenpv', 'xenpvh' and 'xenfv' machines"));
goto cleanup;
}
} else {
--
git-series 0.9.1
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