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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH V7 02/15] xen: Add a generic layer for xc calls
From: Alexander Graf <agraf@xxxxxxx>
This patch adds a generic layer for xc calls, allowing us to choose between the
xenner and xen implementations at runtime.
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
---
hw/xen_interfaces.c | 100 +++++++++++++++++++++++++++++++++++++++++++++++++
hw/xen_interfaces.h | 104 +++++++++++++++++++++++++++++++++++++++++++++++++++
hw/xen_redirect.h | 56 +++++++++++++++++++++++++++
3 files changed, 260 insertions(+), 0 deletions(-)
create mode 100644 hw/xen_interfaces.c
create mode 100644 hw/xen_interfaces.h
create mode 100644 hw/xen_redirect.h
diff --git a/hw/xen_interfaces.c b/hw/xen_interfaces.c
new file mode 100644
index 0000000..09f40e0
--- /dev/null
+++ b/hw/xen_interfaces.c
@@ -0,0 +1,100 @@
+#include <xenctrl.h>
+#include <xs.h>
+
+#include "hw.h"
+#include "xen.h"
+#include "xen_interfaces.h"
+
+#ifdef CONFIG_XEN
+
+static int xc_evtchn_domid(int handle, int domid)
+{
+ return -1;
+}
+
+static struct XenEvtOps xc_evtchn_xen = {
+ .open = xc_evtchn_open,
+ .domid = xc_evtchn_domid,
+ .close = xc_evtchn_close,
+ .fd = xc_evtchn_fd,
+ .notify = xc_evtchn_notify,
+ .bind_unbound_port = xc_evtchn_bind_unbound_port,
+ .bind_interdomain = xc_evtchn_bind_interdomain,
+ .bind_virq = xc_evtchn_bind_virq,
+ .unbind = xc_evtchn_unbind,
+ .pending = xc_evtchn_pending,
+ .unmask = xc_evtchn_unmask,
+};
+
+static int xs_domid(struct xs_handle *h, int domid)
+{
+ return -1;
+}
+
+static struct XenStoreOps xs_xen = {
+ .daemon_open = xs_daemon_open,
+ .domain_open = xs_domain_open,
+ .daemon_open_readonly = xs_daemon_open_readonly,
+ .domid = xs_domid,
+ .daemon_close = xs_daemon_close,
+ .directory = xs_directory,
+ .read = xs_read,
+ .write = xs_write,
+ .mkdir = xs_mkdir,
+ .rm = xs_rm,
+ .get_permissions = xs_get_permissions,
+ .set_permissions = xs_set_permissions,
+ .watch = xs_watch,
+ .fileno = xs_fileno,
+ .read_watch = xs_read_watch,
+ .unwatch = xs_unwatch,
+ .transaction_start = xs_transaction_start,
+ .transaction_end = xs_transaction_end,
+ .introduce_domain = xs_introduce_domain,
+ .resume_domain = xs_resume_domain,
+ .release_domain = xs_release_domain,
+ .get_domain_path = xs_get_domain_path,
+ .is_domain_introduced = xs_is_domain_introduced,
+};
+
+static struct XenGnttabOps xc_gnttab_xen = {
+ .open = xc_gnttab_open,
+ .close = xc_gnttab_close,
+ .map_grant_ref = xc_gnttab_map_grant_ref,
+ .map_grant_refs = xc_gnttab_map_grant_refs,
+ .munmap = xc_gnttab_munmap,
+};
+
+struct XenIfOps xc_xen = {
+ .interface_open = xc_interface_open,
+ .interface_close = xc_interface_close,
+ .map_foreign_range = xc_map_foreign_range,
+ .map_foreign_pages = xc_map_foreign_pages,
+ .map_foreign_bulk = xc_map_foreign_bulk,
+};
+
+#endif
+
+struct XenEvtOps xc_evtchn;
+struct XenGnttabOps xc_gnttab;
+struct XenIfOps xc;
+struct XenStoreOps xs;
+
+void xen_interfaces_init(void)
+{
+ switch (xen_mode) {
+#ifdef CONFIG_XEN
+ case XEN_ATTACH:
+ case XEN_CREATE:
+ xc_evtchn = xc_evtchn_xen;
+ xc_gnttab = xc_gnttab_xen;
+ xc = xc_xen;
+ xs = xs_xen;
+ break;
+#endif
+ default:
+ fprintf(stderr, "ERROR: Compiled without %s support, sorry.\n",
+ xen_mode == XEN_EMULATE ? "xenner" : "Xen");
+ exit(1);
+ }
+}
diff --git a/hw/xen_interfaces.h b/hw/xen_interfaces.h
new file mode 100644
index 0000000..1086850
--- /dev/null
+++ b/hw/xen_interfaces.h
@@ -0,0 +1,104 @@
+#ifndef QEMU_HW_XEN_INTERFACES_H
+#define QEMU_HW_XEN_INTERFACES_H 1
+
+#include <xenctrl.h>
+#include <xs.h>
+
+/* ------------------------------------------------------------- */
+/* xen event channel interface */
+
+struct XenEvtOps {
+ int (*open)(void);
+ int (*domid)(int xce_handle, int domid);
+ int (*close)(int xce_handle);
+ int (*fd)(int xce_handle);
+ int (*notify)(int xce_handle, evtchn_port_t port);
+ evtchn_port_or_error_t (*bind_unbound_port)(int xce_handle, int domid);
+ evtchn_port_or_error_t (*bind_interdomain)(int xce_handle, int domid,
+ evtchn_port_t remote_port);
+ evtchn_port_or_error_t (*bind_virq)(int xce_handle, unsigned int virq);
+ int (*unbind)(int xce_handle, evtchn_port_t port);
+ evtchn_port_or_error_t (*pending)(int xce_handle);
+ int (*unmask)(int xce_handle, evtchn_port_t port);
+};
+extern struct XenEvtOps xc_evtchn;
+
+/* ------------------------------------------------------------- */
+/* xenstore interface */
+
+struct xs_handle;
+struct XenStoreOps {
+ struct xs_handle *(*daemon_open)(void);
+ struct xs_handle *(*domain_open)(void);
+ struct xs_handle *(*daemon_open_readonly)(void);
+ int (*domid)(struct xs_handle *h, int domid);
+ void (*daemon_close)(struct xs_handle *);
+ char **(*directory)(struct xs_handle *h, xs_transaction_t t,
+ const char *path, unsigned int *num);
+ void *(*read)(struct xs_handle *h, xs_transaction_t t,
+ const char *path, unsigned int *len);
+ bool (*write)(struct xs_handle *h, xs_transaction_t t,
+ const char *path, const void *data, unsigned int len);
+ bool (*mkdir)(struct xs_handle *h, xs_transaction_t t,
+ const char *path);
+ bool (*rm)(struct xs_handle *h, xs_transaction_t t,
+ const char *path);
+ struct xs_permissions *(*get_permissions)(struct xs_handle *h,
+ xs_transaction_t t,
+ const char *path, unsigned int
*num);
+ bool (*set_permissions)(struct xs_handle *h, xs_transaction_t t,
+ const char *path, struct xs_permissions *perms,
+ unsigned int num_perms);
+ bool (*watch)(struct xs_handle *h, const char *path, const char *token);
+ int (*fileno)(struct xs_handle *h);
+ char **(*read_watch)(struct xs_handle *h, unsigned int *num);
+ bool (*unwatch)(struct xs_handle *h, const char *path, const char *token);
+ xs_transaction_t (*transaction_start)(struct xs_handle *h);
+ bool (*transaction_end)(struct xs_handle *h, xs_transaction_t t,
+ bool abort);
+ bool (*introduce_domain)(struct xs_handle *h,
+ unsigned int domid,
+ unsigned long mfn,
+ unsigned int eventchn);
+ bool (*resume_domain)(struct xs_handle *h, unsigned int domid);
+ bool (*release_domain)(struct xs_handle *h, unsigned int domid);
+ char *(*get_domain_path)(struct xs_handle *h, unsigned int domid);
+ bool (*is_domain_introduced)(struct xs_handle *h, unsigned int domid);
+};
+extern struct XenStoreOps xs;
+
+/* ------------------------------------------------------------- */
+/* xen grant table interface */
+
+struct XenGnttabOps {
+ int (*open)(void);
+ int (*close)(int xcg_handle);
+ void *(*map_grant_ref)(int xcg_handle, uint32_t domid,
+ uint32_t ref, int prot);
+ void *(*map_grant_refs)(int xcg_handle, uint32_t count,
+ uint32_t *domids, uint32_t *refs, int prot);
+ int (*munmap)(int xcg_handle, void *start_address, uint32_t count);
+};
+extern struct XenGnttabOps xc_gnttab;
+
+/* ------------------------------------------------------------- */
+/* xen hypercall interface */
+
+struct XenIfOps {
+ int (*interface_open)(void);
+ int (*interface_close)(int xc_handle);
+ void *(*map_foreign_range)(int xc_handle, uint32_t dom,
+ int size, int prot,
+ unsigned long mfn);
+ void *(*map_foreign_pages)(int xc_handle, uint32_t dom, int prot,
+ const xen_pfn_t *arr, int num);
+ void *(*map_foreign_bulk)(int xc_handle, uint32_t dom, int prot,
+ xen_pfn_t *arr, int num);
+};
+extern struct XenIfOps xc;
+
+/* ------------------------------------------------------------- */
+
+void xen_interfaces_init(void);
+
+#endif /* QEMU_HW_XEN_INTERFACES_H */
diff --git a/hw/xen_redirect.h b/hw/xen_redirect.h
new file mode 100644
index 0000000..6ddecf3
--- /dev/null
+++ b/hw/xen_redirect.h
@@ -0,0 +1,56 @@
+#ifndef QEMU_HW_XEN_REDIRECT_H
+#define QEMU_HW_XEN_REDIRECT_H 1
+
+#include "xen_interfaces.h"
+
+/* xen event channel interface */
+#define xc_evtchn_open xc_evtchn.open
+#define xc_evtchn_close xc_evtchn.close
+#define xc_evtchn_fd xc_evtchn.fd
+#define xc_evtchn_notify xc_evtchn.notify
+#define xc_evtchn_bind_unbound_port xc_evtchn.bind_unbound_port
+#define xc_evtchn_bind_interdomain xc_evtchn.bind_interdomain
+#define xc_evtchn_bind_virq xc_evtchn.bind_virq
+#define xc_evtchn_unbind xc_evtchn.unbind
+#define xc_evtchn_pending xc_evtchn.pending
+#define xc_evtchn_unmask xc_evtchn.unmask
+
+/* grant table interface */
+#define xc_gnttab_open xc_gnttab.open
+#define xc_gnttab_close xc_gnttab.close
+#define xc_gnttab_map_grant_ref xc_gnttab.map_grant_ref
+#define xc_gnttab_map_grant_refs xc_gnttab.map_grant_refs
+#define xc_gnttab_munmap xc_gnttab.munmap
+
+/* xen hypercall interface */
+#define xc_interface_open xc.interface_open
+#define xc_interface_close xc.interface_close
+#define xc_map_foreign_range xc.map_foreign_range
+#define xc_map_foreign_pages xc.map_foreign_pages
+#define xc_map_foreign_bulk xc.map_foreign_bulk
+
+/* xenstore interface */
+#define xs_daemon_open xs.daemon_open
+#define xs_domain_open xs.domain_open
+#define xs_daemon_open_readonly xs.daemon_open_readonly
+#define xs_daemon_close xs.daemon_close
+#define xs_directory xs.directory
+#define xs_read xs.read
+#define xs_write xs.write
+#define xs_mkdir xs.mkdir
+#define xs_rm xs.rm
+#define xs_get_permissions xs.get_permissions
+#define xs_set_permissions xs.set_permissions
+#define xs_watch xs.watch
+#define xs_fileno xs.fileno
+#define xs_read_watch xs.read_watch
+#define xs_unwatch xs.unwatch
+#define xs_transaction_start xs.transaction_start
+#define xs_transaction_end xs.transaction_end
+#define xs_introduce_domain xs.introduce_domain
+#define xs_resume_domain xs.resume_domain
+#define xs_release_domain xs.release_domain
+#define xs_get_domain_path xs.get_domain_path
+#define xs_is_domain_introduced xs.is_domain_introduced
+
+#endif /* QEMU_HW_XEN_REDIRECT_H */
--
1.7.1
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