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https://github.com/qemu/qemu.git
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b6eb9b45f7
Copy data operated on during request from/to local buffers to/from the grant references. Before grant copy operation local buffers must be allocated what is done by calling ioreq_init_copy_buffers. For the 'read' operation, first, the qemu device invokes the read operation on local buffers and on the completion grant copy is called and buffers are freed. For the 'write' operation grant copy is performed before invoking write by qemu device. A new value 'feature_grant_copy' is added to recognize when the grant copy operation is supported by a guest. Signed-off-by: Paulina Szubarczyk <paulinaszubarczyk@gmail.com> Reviewed-by: Stefano Stabellini <sstabellini@kernel.org> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Roger Pau Monné <roger.pau@citrix.com>
442 lines
14 KiB
C
442 lines
14 KiB
C
#ifndef QEMU_HW_XEN_COMMON_H
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#define QEMU_HW_XEN_COMMON_H
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/*
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* If we have new enough libxenctrl then we do not want/need these compat
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* interfaces, despite what the user supplied cflags might say. They
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* must be undefined before including xenctrl.h
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*/
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#undef XC_WANT_COMPAT_EVTCHN_API
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#undef XC_WANT_COMPAT_GNTTAB_API
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#undef XC_WANT_COMPAT_MAP_FOREIGN_API
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#include <xenctrl.h>
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#include <xenstore.h>
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#include <xen/io/xenbus.h>
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#include "hw/hw.h"
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#include "hw/xen/xen.h"
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#include "hw/pci/pci.h"
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#include "qemu/queue.h"
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#include "trace.h"
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/*
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* We don't support Xen prior to 4.2.0.
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*/
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/* Xen 4.2 through 4.6 */
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 471
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typedef xc_interface xenforeignmemory_handle;
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typedef xc_evtchn xenevtchn_handle;
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typedef xc_gnttab xengnttab_handle;
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#define xenevtchn_open(l, f) xc_evtchn_open(l, f);
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#define xenevtchn_close(h) xc_evtchn_close(h)
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#define xenevtchn_fd(h) xc_evtchn_fd(h)
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#define xenevtchn_pending(h) xc_evtchn_pending(h)
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#define xenevtchn_notify(h, p) xc_evtchn_notify(h, p)
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#define xenevtchn_bind_interdomain(h, d, p) xc_evtchn_bind_interdomain(h, d, p)
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#define xenevtchn_unmask(h, p) xc_evtchn_unmask(h, p)
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#define xenevtchn_unbind(h, p) xc_evtchn_unbind(h, p)
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#define xengnttab_open(l, f) xc_gnttab_open(l, f)
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#define xengnttab_close(h) xc_gnttab_close(h)
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#define xengnttab_set_max_grants(h, n) xc_gnttab_set_max_grants(h, n)
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#define xengnttab_map_grant_ref(h, d, r, p) xc_gnttab_map_grant_ref(h, d, r, p)
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#define xengnttab_unmap(h, a, n) xc_gnttab_munmap(h, a, n)
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#define xengnttab_map_grant_refs(h, c, d, r, p) \
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xc_gnttab_map_grant_refs(h, c, d, r, p)
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#define xengnttab_map_domain_grant_refs(h, c, d, r, p) \
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xc_gnttab_map_domain_grant_refs(h, c, d, r, p)
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#define xenforeignmemory_open(l, f) xen_xc
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static inline void *xenforeignmemory_map(xc_interface *h, uint32_t dom,
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int prot, size_t pages,
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const xen_pfn_t arr[/*pages*/],
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int err[/*pages*/])
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{
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if (err)
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return xc_map_foreign_bulk(h, dom, prot, arr, err, pages);
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else
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return xc_map_foreign_pages(h, dom, prot, arr, pages);
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}
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#define xenforeignmemory_unmap(h, p, s) munmap(p, s * XC_PAGE_SIZE)
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#else /* CONFIG_XEN_CTRL_INTERFACE_VERSION >= 471 */
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#include <xenevtchn.h>
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#include <xengnttab.h>
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#include <xenforeignmemory.h>
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#endif
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void destroy_hvm_domain(bool reboot);
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/* shutdown/destroy current domain because of an error */
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void xen_shutdown_fatal_error(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
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#ifdef HVM_PARAM_VMPORT_REGS_PFN
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static inline int xen_get_vmport_regs_pfn(xc_interface *xc, domid_t dom,
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xen_pfn_t *vmport_regs_pfn)
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{
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int rc;
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uint64_t value;
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rc = xc_hvm_param_get(xc, dom, HVM_PARAM_VMPORT_REGS_PFN, &value);
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if (rc >= 0) {
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*vmport_regs_pfn = (xen_pfn_t) value;
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}
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return rc;
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}
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#else
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static inline int xen_get_vmport_regs_pfn(xc_interface *xc, domid_t dom,
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xen_pfn_t *vmport_regs_pfn)
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{
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return -ENOSYS;
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}
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#endif
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/* Xen before 4.6 */
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
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#ifndef HVM_IOREQSRV_BUFIOREQ_ATOMIC
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#define HVM_IOREQSRV_BUFIOREQ_ATOMIC 2
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#endif
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#endif
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static inline int xen_get_default_ioreq_server_info(xc_interface *xc,
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domid_t dom,
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xen_pfn_t *ioreq_pfn,
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xen_pfn_t *bufioreq_pfn,
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evtchn_port_t
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*bufioreq_evtchn)
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{
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unsigned long param;
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int rc;
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rc = xc_get_hvm_param(xc, dom, HVM_PARAM_IOREQ_PFN, ¶m);
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if (rc < 0) {
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fprintf(stderr, "failed to get HVM_PARAM_IOREQ_PFN\n");
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return -1;
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}
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*ioreq_pfn = param;
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rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_PFN, ¶m);
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if (rc < 0) {
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fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_PFN\n");
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return -1;
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}
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*bufioreq_pfn = param;
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rc = xc_get_hvm_param(xc, dom, HVM_PARAM_BUFIOREQ_EVTCHN,
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¶m);
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if (rc < 0) {
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fprintf(stderr, "failed to get HVM_PARAM_BUFIOREQ_EVTCHN\n");
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return -1;
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}
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*bufioreq_evtchn = param;
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return 0;
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}
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/* Xen before 4.5 */
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 450
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#ifndef HVM_PARAM_BUFIOREQ_EVTCHN
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#define HVM_PARAM_BUFIOREQ_EVTCHN 26
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#endif
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#define IOREQ_TYPE_PCI_CONFIG 2
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typedef uint16_t ioservid_t;
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static inline void xen_map_memory_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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}
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static inline void xen_unmap_memory_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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}
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static inline void xen_map_io_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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}
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static inline void xen_unmap_io_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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}
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static inline void xen_map_pcidev(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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PCIDevice *pci_dev)
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{
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}
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static inline void xen_unmap_pcidev(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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PCIDevice *pci_dev)
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{
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}
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static inline void xen_create_ioreq_server(xc_interface *xc, domid_t dom,
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ioservid_t *ioservid)
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{
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}
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static inline void xen_destroy_ioreq_server(xc_interface *xc, domid_t dom,
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ioservid_t ioservid)
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{
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}
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static inline int xen_get_ioreq_server_info(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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xen_pfn_t *ioreq_pfn,
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xen_pfn_t *bufioreq_pfn,
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evtchn_port_t *bufioreq_evtchn)
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{
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return xen_get_default_ioreq_server_info(xc, dom, ioreq_pfn, bufioreq_pfn,
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bufioreq_evtchn);
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}
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static inline int xen_set_ioreq_server_state(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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bool enable)
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{
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return 0;
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}
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/* Xen 4.5 */
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#else
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static bool use_default_ioreq_server;
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static inline void xen_map_memory_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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hwaddr start_addr = section->offset_within_address_space;
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ram_addr_t size = int128_get64(section->size);
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hwaddr end_addr = start_addr + size - 1;
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_map_mmio_range(ioservid, start_addr, end_addr);
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xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 1,
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start_addr, end_addr);
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}
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static inline void xen_unmap_memory_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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hwaddr start_addr = section->offset_within_address_space;
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ram_addr_t size = int128_get64(section->size);
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hwaddr end_addr = start_addr + size - 1;
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_unmap_mmio_range(ioservid, start_addr, end_addr);
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xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 1,
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start_addr, end_addr);
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}
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static inline void xen_map_io_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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hwaddr start_addr = section->offset_within_address_space;
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ram_addr_t size = int128_get64(section->size);
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hwaddr end_addr = start_addr + size - 1;
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_map_portio_range(ioservid, start_addr, end_addr);
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xc_hvm_map_io_range_to_ioreq_server(xc, dom, ioservid, 0,
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start_addr, end_addr);
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}
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static inline void xen_unmap_io_section(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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MemoryRegionSection *section)
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{
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hwaddr start_addr = section->offset_within_address_space;
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ram_addr_t size = int128_get64(section->size);
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hwaddr end_addr = start_addr + size - 1;
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_unmap_portio_range(ioservid, start_addr, end_addr);
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xc_hvm_unmap_io_range_from_ioreq_server(xc, dom, ioservid, 0,
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start_addr, end_addr);
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}
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static inline void xen_map_pcidev(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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PCIDevice *pci_dev)
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{
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_map_pcidev(ioservid, pci_bus_num(pci_dev->bus),
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PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
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xc_hvm_map_pcidev_to_ioreq_server(xc, dom, ioservid,
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0, pci_bus_num(pci_dev->bus),
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PCI_SLOT(pci_dev->devfn),
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PCI_FUNC(pci_dev->devfn));
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}
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static inline void xen_unmap_pcidev(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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PCIDevice *pci_dev)
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{
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_unmap_pcidev(ioservid, pci_bus_num(pci_dev->bus),
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PCI_SLOT(pci_dev->devfn), PCI_FUNC(pci_dev->devfn));
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xc_hvm_unmap_pcidev_from_ioreq_server(xc, dom, ioservid,
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0, pci_bus_num(pci_dev->bus),
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PCI_SLOT(pci_dev->devfn),
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PCI_FUNC(pci_dev->devfn));
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}
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static inline void xen_create_ioreq_server(xc_interface *xc, domid_t dom,
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ioservid_t *ioservid)
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{
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int rc = xc_hvm_create_ioreq_server(xc, dom, HVM_IOREQSRV_BUFIOREQ_ATOMIC,
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ioservid);
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if (rc == 0) {
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trace_xen_ioreq_server_create(*ioservid);
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return;
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}
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*ioservid = 0;
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use_default_ioreq_server = true;
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trace_xen_default_ioreq_server();
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}
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static inline void xen_destroy_ioreq_server(xc_interface *xc, domid_t dom,
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ioservid_t ioservid)
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{
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if (use_default_ioreq_server) {
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return;
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}
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trace_xen_ioreq_server_destroy(ioservid);
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xc_hvm_destroy_ioreq_server(xc, dom, ioservid);
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}
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static inline int xen_get_ioreq_server_info(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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xen_pfn_t *ioreq_pfn,
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xen_pfn_t *bufioreq_pfn,
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evtchn_port_t *bufioreq_evtchn)
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{
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if (use_default_ioreq_server) {
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return xen_get_default_ioreq_server_info(xc, dom, ioreq_pfn,
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bufioreq_pfn,
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bufioreq_evtchn);
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}
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return xc_hvm_get_ioreq_server_info(xc, dom, ioservid,
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ioreq_pfn, bufioreq_pfn,
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bufioreq_evtchn);
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}
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static inline int xen_set_ioreq_server_state(xc_interface *xc, domid_t dom,
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ioservid_t ioservid,
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bool enable)
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{
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if (use_default_ioreq_server) {
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return 0;
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}
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trace_xen_ioreq_server_state(ioservid, enable);
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return xc_hvm_set_ioreq_server_state(xc, dom, ioservid, enable);
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}
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#endif
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 460
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static inline int xen_xc_domain_add_to_physmap(xc_interface *xch, uint32_t domid,
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unsigned int space,
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unsigned long idx,
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xen_pfn_t gpfn)
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{
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return xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
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}
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#else
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static inline int xen_xc_domain_add_to_physmap(xc_interface *xch, uint32_t domid,
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unsigned int space,
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unsigned long idx,
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xen_pfn_t gpfn)
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{
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/* In Xen 4.6 rc is -1 and errno contains the error value. */
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int rc = xc_domain_add_to_physmap(xch, domid, space, idx, gpfn);
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if (rc == -1)
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return errno;
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return rc;
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}
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#endif
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#ifdef CONFIG_XEN_PV_DOMAIN_BUILD
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 470
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static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
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xen_domain_handle_t handle, uint32_t flags,
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uint32_t *pdomid)
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{
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return xc_domain_create(xc, ssidref, handle, flags, pdomid);
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}
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#else
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static inline int xen_domain_create(xc_interface *xc, uint32_t ssidref,
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xen_domain_handle_t handle, uint32_t flags,
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uint32_t *pdomid)
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{
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return xc_domain_create(xc, ssidref, handle, flags, pdomid, NULL);
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}
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#endif
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#endif
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/* Xen before 4.8 */
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#if CONFIG_XEN_CTRL_INTERFACE_VERSION < 480
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typedef void *xengnttab_grant_copy_segment_t;
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static inline int xengnttab_grant_copy(xengnttab_handle *xgt, uint32_t count,
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xengnttab_grant_copy_segment_t *segs)
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{
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return -ENOSYS;
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}
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#endif
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#endif /* QEMU_HW_XEN_COMMON_H */
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