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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] xl/libxl: add pvcalls support
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On Tue, 27 Feb 2018, Stefano Stabellini wrote:
> Add pvcalls support to libxl and xl. Create the appropriate pvcalls
> entries in xenstore.
>
> Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
>
> diff --git a/docs/misc/xenstore-paths.markdown
> b/docs/misc/xenstore-paths.markdown
> index 7be2592..77d1a36 100644
> --- a/docs/misc/xenstore-paths.markdown
> +++ b/docs/misc/xenstore-paths.markdown
> @@ -299,6 +299,11 @@ A virtual scsi device frontend. Described by
> A virtual usb device frontend. Described by
> [xen/include/public/io/usbif.h][USBIF]
>
> +#### ~/device/pvcalls/$DEVID/* []
> +
> +Paravirtualized POSIX function calls frontend. Described by
> +[docs/misc/pvcalls.markdown][PVCALLS]
> +
> #### ~/console/* []
>
> The primary PV console device. Described in [console.txt](console.txt)
> @@ -377,6 +382,10 @@ A PV SCSI backend.
>
> A PV USB backend. Described by
> [xen/include/public/io/usbif.h][USBIF]
> +
> +#### ~/backend/pvcalls/$DOMID/$DEVID/* []
> +
> +A PVCalls backend. Described in [docs/misc/pvcalls.markdown][PVCALLS].
>
> #### ~/backend/console/$DOMID/$DEVID/* []
>
> diff --git a/tools/libxl/Makefile b/tools/libxl/Makefile
> index 917ceb0..035e66e 100644
> --- a/tools/libxl/Makefile
> +++ b/tools/libxl/Makefile
> @@ -140,7 +140,7 @@ LIBXL_OBJS = flexarray.o libxl.o libxl_create.o
> libxl_dm.o libxl_pci.o \
> libxl_vtpm.o libxl_nic.o libxl_disk.o libxl_console.o \
> libxl_cpupool.o libxl_mem.o libxl_sched.o libxl_tmem.o \
> libxl_9pfs.o libxl_domain.o libxl_vdispl.o \
> - $(LIBXL_OBJS-y)
> + libxl_pvcalls.o $(LIBXL_OBJS-y)
> LIBXL_OBJS += libxl_genid.o
> LIBXL_OBJS += _libxl_types.o libxl_flask.o _libxl_types_internal.o
>
> diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
> index eca0ea2..76574d2 100644
> --- a/tools/libxl/libxl.h
> +++ b/tools/libxl/libxl.h
> @@ -2006,6 +2006,16 @@ int libxl_device_p9_destroy(libxl_ctx *ctx, uint32_t
> domid,
> const libxl_asyncop_how *ao_how)
> LIBXL_EXTERNAL_CALLERS_ONLY;
>
> +/* pvcalls */
> +int libxl_device_pvcalls_remove(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_pvcalls *pvcalls,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +int libxl_device_pvcalls_destroy(libxl_ctx *ctx, uint32_t domid,
> + libxl_device_pvcalls *pvcalls,
> + const libxl_asyncop_how *ao_how)
> + LIBXL_EXTERNAL_CALLERS_ONLY;
> +
> /* PCI Passthrough */
> int libxl_device_pci_add(libxl_ctx *ctx, uint32_t domid,
> libxl_device_pci *pcidev,
> diff --git a/tools/libxl/libxl_create.c b/tools/libxl/libxl_create.c
> index c498135..bbdeee5 100644
> --- a/tools/libxl/libxl_create.c
> +++ b/tools/libxl/libxl_create.c
> @@ -1374,6 +1374,9 @@ static void domcreate_launch_dm(libxl__egc *egc,
> libxl__multidev *multidev,
> for (i = 0; i < d_config->num_p9s; i++)
> libxl__device_add(gc, domid, &libxl__p9_devtype, &d_config->p9s[i]);
>
> + for (i = 0; i < d_config->num_pvcallss; i++)
> + libxl__device_add(gc, domid, &libxl__pvcalls_devtype,
> &d_config->pvcallss[i]);
> +
> switch (d_config->c_info.type) {
> case LIBXL_DOMAIN_TYPE_HVM:
> {
> diff --git a/tools/libxl/libxl_internal.h b/tools/libxl/libxl_internal.h
> index 506687f..e9edfac 100644
> --- a/tools/libxl/libxl_internal.h
> +++ b/tools/libxl/libxl_internal.h
> @@ -3648,6 +3648,7 @@ extern const struct libxl_device_type
> libxl__usbdev_devtype;
> extern const struct libxl_device_type libxl__pcidev_devtype;
> extern const struct libxl_device_type libxl__vdispl_devtype;
> extern const struct libxl_device_type libxl__p9_devtype;
> +extern const struct libxl_device_type libxl__pvcalls_devtype;
>
> extern const struct libxl_device_type *device_type_tbl[];
>
> diff --git a/tools/libxl/libxl_pvcalls.c b/tools/libxl/libxl_pvcalls.c
> new file mode 100644
> index 0000000..a285343
> --- /dev/null
> +++ b/tools/libxl/libxl_pvcalls.c
> @@ -0,0 +1,37 @@
> +/*
> + * Copyright (C) 2018 Aporeto
> + * Author Stefano Stabellini <stefano@xxxxxxxxxxx>
> + *
> + * This program 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; version 2.1 only. with the special
> + * exception on linking described in file LICENSE.
> + *
> + * This program 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.
> + */
> +
> +#include "libxl_osdeps.h"
> +
> +#include "libxl_internal.h"
> +
> +static int libxl__device_pvcalls_setdefault(libxl__gc *gc, uint32_t domid,
> + libxl_device_pvcalls *pvcalls,
> + bool hotplug)
> +{
> + return libxl__resolve_domid(gc, pvcalls->backend_domname,
> + &pvcalls->backend_domid);
> +}
> +
> +static LIBXL_DEFINE_UPDATE_DEVID(pvcalls)
> +static LIBXL_DEFINE_DEVICE_FROM_TYPE(pvcalls)
> +
> +#define libxl__add_pvcallss NULL
> +#define libxl_device_pvcalls_list NULL
> +#define libxl_device_pvcalls_compare NULL
> +
> +LIBXL_DEFINE_DEVICE_REMOVE(pvcalls)
> +
> +DEFINE_DEVICE_TYPE_STRUCT(pvcalls, PVCALLS);
> diff --git a/tools/libxl/libxl_types.idl b/tools/libxl/libxl_types.idl
> index 3503812..89c6ef6 100644
> --- a/tools/libxl/libxl_types.idl
> +++ b/tools/libxl/libxl_types.idl
> @@ -790,6 +790,12 @@ libxl_device_p9 = Struct("device_p9", [
> ("devid", libxl_devid),
> ])
>
> +libxl_device_pvcalls = Struct("device_pvcalls", [
> + ("backend_domid", libxl_domid),
> + ("backend_domname", string),
> + ("devid", libxl_devid),
> +])
> +
> libxl_device_channel = Struct("device_channel", [
> ("backend_domid", libxl_domid),
> ("backend_domname", string),
> @@ -829,6 +835,7 @@ libxl_domain_config = Struct("domain_config", [
> ("vkbs", Array(libxl_device_vkb, "num_vkbs")),
> ("vtpms", Array(libxl_device_vtpm, "num_vtpms")),
> ("p9s", Array(libxl_device_p9, "num_p9s")),
> + ("pvcallss", Array(libxl_device_pvcalls, "num_pvcallss")),
> ("vdispls", Array(libxl_device_vdispl, "num_vdispls")),
> # a channel manifests as a console with a name,
> # see docs/misc/channels.txt
> diff --git a/tools/libxl/libxl_types_internal.idl
> b/tools/libxl/libxl_types_internal.idl
> index d144dd6..f2ff017 100644
> --- a/tools/libxl/libxl_types_internal.idl
> +++ b/tools/libxl/libxl_types_internal.idl
> @@ -28,6 +28,7 @@ libxl__device_kind = Enumeration("device_kind", [
> (11, "9PFS"),
> (12, "VDISPL"),
> (13, "VUART"),
> + (14, "PVCALLS"),
> ])
>
> libxl__console_backend = Enumeration("console_backend", [
> diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
> index f684254..da051ed 100644
> --- a/tools/xl/xl_parse.c
> +++ b/tools/xl/xl_parse.c
> @@ -860,7 +860,7 @@ void parse_config_data(const char *config_source,
> long l, vcpus = 0;
> XLU_Config *config;
> XLU_ConfigList *cpus, *vbds, *nics, *pcis, *cvfbs, *cpuids, *vtpms,
> - *usbctrls, *usbdevs, *p9devs, *vdispls;
> + *usbctrls, *usbdevs, *p9devs, *vdispls, *pvcalls_devs;
> XLU_ConfigList *channels, *ioports, *irqs, *iomem, *viridian, *dtdevs,
> *mca_caps;
> int num_ioports, num_irqs, num_iomem, num_cpus, num_viridian,
> num_mca_caps;
> @@ -1691,6 +1691,41 @@ void parse_config_data(const char *config_source,
> }
> }
>
> + if (!xlu_cfg_get_list(config, "pvcalls", &pvcalls_devs, 0, 0)) {
> + d_config->num_pvcallss = 0;
> + d_config->pvcallss = NULL;
> + while ((buf = xlu_cfg_get_listitem (pvcalls_devs,
> d_config->num_pvcallss)) != NULL) {
> + libxl_device_pvcalls *pvcalls;
> + char *backend = NULL;
> + char *p, *p2, *buf2;
> + pvcalls = ARRAY_EXTEND_INIT(d_config->pvcallss,
> + d_config->num_pvcallss,
> + libxl_device_pvcalls_init);
> +
> + buf2 = strdup(buf);
> + p = strtok(buf2, ",");
> + if (p) {
> + do {
> + while (*p == ' ')
> + ++p;
> + if ((p2 = strchr(p, '=')) == NULL)
> + break;
> + *p2 = '\0';
> + if(!strcmp(p, "backend")) {
> + backend = strdup(p2 + 1);
> + } else {
> + fprintf(stderr, "Unknown string `%s' in pvcalls
> spec\n", p);
> + exit(1);
> + }
> + } while ((p = strtok(NULL, ",")) != NULL);
> + }
> + free(buf2);
> +
> + if (backend)
> + replace_string(&pvcalls->backend_domname, backend);
> + }
> + }
> +
> if (!xlu_cfg_get_list (config, "channel", &channels, 0, 0)) {
> d_config->num_channels = 0;
> d_config->channels = NULL;
>
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