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Remove broken Xen PV domain builder

Browse source 
It is broken since Xen 4.9 [1] and it will not build in Xen 4.12. Also,
it is not built by default since QEMU 2.6.

[1] https://lists.xenproject.org/archives/html/xen-devel/2018-09/msg00313.html

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>
This commit is contained in:
Anthony PERARD 2018-09-14 12:18:29 +01:00
parent 19f87870ba
commit 6d7c06c213
9 changed files with 0 additions and 379 deletions
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17
configure vendored
View file

@ -357,7 +357,6 @@ vnc_png=""
xkbcommon=""
xen=""
xen_ctrl_version=""
xen_pv_domain_build="no"
xen_pci_passthrough=""
linux_aio=""
cap_ng=""
@ -1119,10 +1118,6 @@ for opt do
;;
--enable-xen-pci-passthrough) xen_pci_passthrough="yes"
;;
--disable-xen-pv-domain-build) xen_pv_domain_build="no"
;;
--enable-xen-pv-domain-build) xen_pv_domain_build="yes"
;;
--disable-brlapi) brlapi="no"
;;
--enable-brlapi) brlapi="yes"
@ -1685,8 +1680,6 @@ Advanced options (experts only):
--tls-priority default TLS protocol/cipher priority string
--enable-gprof QEMU profiling with gprof
--enable-profiler profiler support
--enable-xen-pv-domain-build
xen pv domain builder
--enable-debug-stack-usage
track the maximum stack usage of stacks created by qemu_alloc_stack
@ -2678,12 +2671,6 @@ if test "$xen_pci_passthrough" != "no"; then
fi
fi
if test "$xen_pv_domain_build" = "yes" &&
test "$xen" != "yes"; then
error_exit "User requested Xen PV domain builder support" \
"which requires Xen support."
fi
##########################################
# Windows Hypervisor Platform accelerator (WHPX) check
if test "$whpx" != "no" ; then
@ -6069,7 +6056,6 @@ fi
echo "xen support $xen"
if test "$xen" = "yes" ; then
echo "xen ctrl version $xen_ctrl_version"
echo "pv dom build $xen_pv_domain_build"
fi
echo "brlapi support $brlapi"
echo "bluez support $bluez"
@ -6539,9 +6525,6 @@ fi
if test "$xen" = "yes" ; then
echo "CONFIG_XEN_BACKEND=y" >> $config_host_mak
echo "CONFIG_XEN_CTRL_INTERFACE_VERSION=$xen_ctrl_version" >> $config_host_mak
if test "$xen_pv_domain_build" = "yes" ; then
echo "CONFIG_XEN_PV_DOMAIN_BUILD=y" >> $config_host_mak
fi
fi
if test "$linux_aio" = "yes" ; then
echo "CONFIG_LINUX_AIO=y" >> $config_host_mak

2
hw/xenpv/Makefile.objs
View file

@ -1,4 +1,2 @@
# Xen PV machine support
obj-$(CONFIG_XEN) += xen_machine_pv.o
# Xen PV machine builder support
obj-$(CONFIG_XEN_PV_DOMAIN_BUILD) += xen_domainbuild.o

299
hw/xenpv/xen_domainbuild.c
View file

@ -1,299 +0,0 @@
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "hw/xen/xen-legacy-backend.h"
#include "xen_domainbuild.h"
#include "qemu/timer.h"
#include "qemu/log.h"
#include <xenguest.h>
static int xenstore_domain_mkdir(char *path)
{
struct xs_permissions perms_ro[] = {{
.id = 0, /* set owner: dom0 */
},{
.id = xen_domid,
.perms = XS_PERM_READ,
}};
struct xs_permissions perms_rw[] = {{
.id = 0, /* set owner: dom0 */
},{
.id = xen_domid,
.perms = XS_PERM_READ | XS_PERM_WRITE,
}};
const char *writable[] = { "device", "control", "error", NULL };
char subpath[256];
int i;
if (!xs_mkdir(xenstore, 0, path)) {
fprintf(stderr, "%s: xs_mkdir %s: failed\n", __func__, path);
return -1;
}
if (!xs_set_permissions(xenstore, 0, path, perms_ro, 2)) {
fprintf(stderr, "%s: xs_set_permissions failed\n", __func__);
return -1;
}
for (i = 0; writable[i]; i++) {
snprintf(subpath, sizeof(subpath), "%s/%s", path, writable[i]);
if (!xs_mkdir(xenstore, 0, subpath)) {
fprintf(stderr, "%s: xs_mkdir %s: failed\n", __func__, subpath);
return -1;
}
if (!xs_set_permissions(xenstore, 0, subpath, perms_rw, 2)) {
fprintf(stderr, "%s: xs_set_permissions failed\n", __func__);
return -1;
}
}
return 0;
}
int xenstore_domain_init1(const char *kernel, const char *ramdisk,
const char *cmdline)
{
char *dom, uuid_string[42], vm[256], path[256];
int i;
qemu_uuid_unparse(&qemu_uuid, uuid_string);
dom = xs_get_domain_path(xenstore, xen_domid);
snprintf(vm, sizeof(vm), "/vm/%s", uuid_string);
xenstore_domain_mkdir(dom);
xenstore_write_str(vm, "image/ostype", "linux");
if (kernel)
xenstore_write_str(vm, "image/kernel", kernel);
if (ramdisk)
xenstore_write_str(vm, "image/ramdisk", ramdisk);
if (cmdline)
xenstore_write_str(vm, "image/cmdline", cmdline);
/* name + id */
xenstore_write_str(vm, "name", qemu_name ? qemu_name : "no-name");
xenstore_write_str(vm, "uuid", uuid_string);
xenstore_write_str(dom, "name", qemu_name ? qemu_name : "no-name");
xenstore_write_int(dom, "domid", xen_domid);
xenstore_write_str(dom, "vm", vm);
/* memory */
xenstore_write_int(dom, "memory/target", ram_size / KiB);
xenstore_write_int(vm, "memory", ram_size / MiB);
xenstore_write_int(vm, "maxmem", ram_size / MiB);
/* cpus */
for (i = 0; i < smp_cpus; i++) {
snprintf(path, sizeof(path), "cpu/%d/availability",i);
xenstore_write_str(dom, path, "online");
}
xenstore_write_int(vm, "vcpu_avail", smp_cpus);
xenstore_write_int(vm, "vcpus", smp_cpus);
/* vnc password */
xenstore_write_str(vm, "vncpassword", "" /* FIXME */);
free(dom);
return 0;
}
int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
int console_port, int console_mfn)
{
char *dom;
dom = xs_get_domain_path(xenstore, xen_domid);
/* signal new domain */
xs_introduce_domain(xenstore,
xen_domid,
xenstore_mfn,
xenstore_port);
/* xenstore */
xenstore_write_int(dom, "store/ring-ref", xenstore_mfn);
xenstore_write_int(dom, "store/port", xenstore_port);
/* console */
xenstore_write_str(dom, "console/type", "ioemu");
xenstore_write_int(dom, "console/limit", 128 * KiB);
xenstore_write_int(dom, "console/ring-ref", console_mfn);
xenstore_write_int(dom, "console/port", console_port);
xen_config_dev_console(0);
free(dom);
return 0;
}
/* ------------------------------------------------------------- */
static QEMUTimer *xen_poll;
/* check domain state once per second */
static void xen_domain_poll(void *opaque)
{
struct xc_dominfo info;
int rc;
rc = xc_domain_getinfo(xen_xc, xen_domid, 1, &info);
if ((rc != 1) || (info.domid != xen_domid)) {
qemu_log("xen: domain %d is gone\n", xen_domid);
goto quit;
}
if (info.dying) {
qemu_log("xen: domain %d is dying (%s%s)\n", xen_domid,
info.crashed ? "crashed" : "",
info.shutdown ? "shutdown" : "");
goto quit;
}
timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
return;
quit:
qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
}
static int xen_domain_watcher(void)
{
int qemu_running = 1;
int fd[2], i, n, rc;
char byte;
if (pipe(fd) != 0) {
qemu_log("%s: Huh? pipe error: %s\n", __func__, strerror(errno));
return -1;
}
if (fork() != 0)
return 0; /* not child */
/* close all file handles, except stdio/out/err,
* our watch pipe and the xen interface handle */
n = getdtablesize();
for (i = 3; i < n; i++) {
if (i == fd[0])
continue;
close(i);
}
/*
* Reopen xc interface, since the original is unsafe after fork
* and was closed above.
*/
xen_xc = xc_interface_open(0, 0, 0);
/* ignore term signals */
signal(SIGINT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
/* wait for qemu exiting */
while (qemu_running) {
rc = read(fd[0], &byte, 1);
switch (rc) {
case -1:
if (errno == EINTR)
continue;
qemu_log("%s: Huh? read error: %s\n", __func__, strerror(errno));
qemu_running = 0;
break;
case 0:
/* EOF -> qemu exited */
qemu_running = 0;
break;
default:
qemu_log("%s: Huh? data on the watch pipe?\n", __func__);
break;
}
}
/* cleanup */
qemu_log("%s: destroy domain %d\n", __func__, xen_domid);
xc_domain_destroy(xen_xc, xen_domid);
_exit(0);
}
/* normal cleanup */
static void xen_domain_cleanup(void)
{
char *dom;
dom = xs_get_domain_path(xenstore, xen_domid);
if (dom) {
xs_rm(xenstore, 0, dom);
free(dom);
}
xs_release_domain(xenstore, xen_domid);
}
int xen_domain_build_pv(const char *kernel, const char *ramdisk,
const char *cmdline)
{
uint32_t ssidref = 0;
uint32_t flags = 0;
xen_domain_handle_t uuid;
unsigned int xenstore_port = 0, console_port = 0;
unsigned long xenstore_mfn = 0, console_mfn = 0;
int rc;
memcpy(uuid, &qemu_uuid, sizeof(uuid));
rc = xen_domain_create(xen_xc, ssidref, uuid, flags, &xen_domid);
if (rc < 0) {
fprintf(stderr, "xen: xc_domain_create() failed\n");
goto err;
}
qemu_log("xen: created domain %d\n", xen_domid);
atexit(xen_domain_cleanup);
if (xen_domain_watcher() == -1) {
goto err;
}
xenstore_domain_init1(kernel, ramdisk, cmdline);
rc = xc_domain_max_vcpus(xen_xc, xen_domid, smp_cpus);
if (rc < 0) {
fprintf(stderr, "xen: xc_domain_max_vcpus() failed\n");
goto err;
}
#if 0
rc = xc_domain_setcpuweight(xen_xc, xen_domid, 256);
if (rc < 0) {
fprintf(stderr, "xen: xc_domain_setcpuweight() failed\n");
goto err;
}
#endif
rc = xc_domain_setmaxmem(xen_xc, xen_domid, ram_size / KiB);
if (rc < 0) {
fprintf(stderr, "xen: xc_domain_setmaxmem() failed\n");
goto err;
}
xenstore_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
console_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
rc = xc_linux_build(xen_xc, xen_domid, ram_size / MiB,
kernel, ramdisk, cmdline,
0, flags,
xenstore_port, &xenstore_mfn,
console_port, &console_mfn);
if (rc < 0) {
fprintf(stderr, "xen: xc_linux_build() failed\n");
goto err;
}
xenstore_domain_init2(xenstore_port, xenstore_mfn,
console_port, console_mfn);
qemu_log("xen: unpausing domain %d\n", xen_domid);
rc = xc_domain_unpause(xen_xc, xen_domid);
if (rc < 0) {
fprintf(stderr, "xen: xc_domain_unpause() failed\n");
goto err;
}
xen_poll = timer_new_ms(QEMU_CLOCK_REALTIME, xen_domain_poll, NULL);
timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
return 0;
err:
return -1;
}

13
hw/xenpv/xen_domainbuild.h
View file

@ -1,13 +0,0 @@
#ifndef QEMU_HW_XEN_DOMAINBUILD_H
#define QEMU_HW_XEN_DOMAINBUILD_H
#include "hw/xen/xen_common.h"
int xenstore_domain_init1(const char *kernel, const char *ramdisk,
const char *cmdline);
int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
int console_port, int console_mfn);
int xen_domain_build_pv(const char *kernel, const char *ramdisk,
const char *cmdline);
#endif /* QEMU_HW_XEN_DOMAINBUILD_H */

14
hw/xenpv/xen_machine_pv.c
View file

@ -28,7 +28,6 @@
#include "hw/boards.h"
#include "hw/xen/xen-legacy-backend.h"
#include "hw/xen/xen-bus.h"
#include "xen_domainbuild.h"
#include "sysemu/block-backend.h"
static void xen_init_pv(MachineState *machine)
@ -46,19 +45,6 @@ static void xen_init_pv(MachineState *machine)
case XEN_ATTACH:
/* nothing to do, xend handles everything */
break;
#ifdef CONFIG_XEN_PV_DOMAIN_BUILD
case XEN_CREATE: {
const char *kernel_filename = machine->kernel_filename;
const char *kernel_cmdline = machine->kernel_cmdline;
const char *initrd_filename = machine->initrd_filename;
if (xen_domain_build_pv(kernel_filename, initrd_filename,
kernel_cmdline) < 0) {
error_report("xen pv domain creation failed");
exit(1);
}
break;
}
#endif
case XEN_EMULATE:
error_report("xen emulation not implemented (yet)");
exit(1);

1
include/hw/xen/xen.h
View file

@ -15,7 +15,6 @@
/* xen-machine.c */
enum xen_mode {
XEN_EMULATE = 0, // xen emulation, using xenner (default)
XEN_CREATE, // create xen domain
XEN_ATTACH // attach to xen domain created by xend
};

18
include/hw/xen/xen_common.h
View file

@ -662,24 +662,6 @@ static inline int xen_set_ioreq_server_state(domid_t dom,
#endif
#ifdef CONFIG_XEN_PV_DOMAIN_BUILD
#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40700
static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
xen_domain_handle_t handle, uint32_t flags,
uint32_t *pdomid)
{
return xc_domain_create(xc, ssidref, handle, flags, pdomid);
}
#else
static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
xen_domain_handle_t handle, uint32_t flags,
uint32_t *pdomid)
{
return xc_domain_create(xc, ssidref, handle, flags, pdomid, NULL);
}
#endif
#endif
/* Xen before 4.8 */
#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 40800

8
qemu-options.hx
View file

@ -3394,10 +3394,6 @@ ETEXI
DEF("xen-domid", HAS_ARG, QEMU_OPTION_xen_domid,
"-xen-domid id specify xen guest domain id\n", QEMU_ARCH_ALL)
DEF("xen-create", 0, QEMU_OPTION_xen_create,
"-xen-create create domain using xen hypercalls, bypassing xend\n"
" warning: should not be used when xend is in use\n",
QEMU_ARCH_ALL)
DEF("xen-attach", 0, QEMU_OPTION_xen_attach,
"-xen-attach attach to existing xen domain\n"
" xend will use this when starting QEMU\n",
@ -3411,10 +3407,6 @@ STEXI
@item -xen-domid @var{id}
@findex -xen-domid
Specify xen guest domain @var{id} (XEN only).
@item -xen-create
@findex -xen-create
Create domain using xen hypercalls, bypassing xend.
Warning: should not be used when xend is in use (XEN only).
@item -xen-attach
@findex -xen-attach
Attach to existing xen domain.

7
vl.c
View file

@ -3856,13 +3856,6 @@ int main(int argc, char **argv, char **envp)
}
xen_domid = atoi(optarg);
break;
case QEMU_OPTION_xen_create:
if (!(xen_available())) {
error_report("Option not supported for this target");
exit(1);
}
xen_mode = XEN_CREATE;
break;
case QEMU_OPTION_xen_attach:
if (!(xen_available())) {
error_report("Option not supported for this target");