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https://github.com/xen-project/xen.git
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kaf24@firebug.cl.cam.ac.uk
2d0922d515
Make header path for kernel's privcmd/evtchn headers generic. Remove pointless xi_*() interface that was using private libxc interfaces. Signed-off-by: John Levon <john.levon@sun.com>
105 lines
2.8 KiB
C
105 lines
2.8 KiB
C
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#ifndef XC_PRIVATE_H
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#define XC_PRIVATE_H
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#include <unistd.h>
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#include <stdio.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <string.h>
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#include <sys/mman.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include "xenctrl.h"
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#include <xen/sys/privcmd.h>
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/* valgrind cannot see when a hypercall has filled in some values. For this
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reason, we must zero the privcmd_hypercall_t or dom0_op_t instance before a
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call, if using valgrind. */
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#ifdef VALGRIND
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#define DECLARE_HYPERCALL privcmd_hypercall_t hypercall = { 0 }
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#define DECLARE_DOM0_OP dom0_op_t op = { 0 }
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#else
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#define DECLARE_HYPERCALL privcmd_hypercall_t hypercall
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#define DECLARE_DOM0_OP dom0_op_t op
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#endif
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#define PAGE_SHIFT XC_PAGE_SHIFT
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#define PAGE_SIZE (1UL << PAGE_SHIFT)
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#define PAGE_MASK (~(PAGE_SIZE-1))
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#define ERROR(_m, _a...) \
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do { \
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int __saved_errno = errno; \
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fprintf(stderr, "ERROR: " _m "\n" , ## _a ); \
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errno = __saved_errno; \
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} while (0)
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#define PERROR(_m, _a...) \
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do { \
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int __saved_errno = errno; \
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fprintf(stderr, "ERROR: " _m " (%d = %s)\n" , ## _a , \
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__saved_errno, strerror(__saved_errno)); \
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errno = __saved_errno; \
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} while (0)
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static inline void safe_munlock(const void *addr, size_t len)
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{
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int saved_errno = errno;
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(void)munlock(addr, len);
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errno = saved_errno;
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}
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int do_xen_hypercall(int xc_handle, privcmd_hypercall_t *hypercall);
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static inline int do_xen_version(int xc_handle, int cmd, void *dest)
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{
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DECLARE_HYPERCALL;
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hypercall.op = __HYPERVISOR_xen_version;
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hypercall.arg[0] = (unsigned long) cmd;
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hypercall.arg[1] = (unsigned long) dest;
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return do_xen_hypercall(xc_handle, &hypercall);
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}
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static inline int do_dom0_op(int xc_handle, dom0_op_t *op)
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{
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int ret = -1;
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DECLARE_HYPERCALL;
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op->interface_version = DOM0_INTERFACE_VERSION;
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hypercall.op = __HYPERVISOR_dom0_op;
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hypercall.arg[0] = (unsigned long)op;
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if ( mlock(op, sizeof(*op)) != 0 )
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{
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PERROR("Could not lock memory for Xen hypercall");
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goto out1;
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}
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if ( (ret = do_xen_hypercall(xc_handle, &hypercall)) < 0 )
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{
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if ( errno == EACCES )
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fprintf(stderr, "Dom0 operation failed -- need to"
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" rebuild the user-space tool set?\n");
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}
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safe_munlock(op, sizeof(*op));
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out1:
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return ret;
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}
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int xc_map_foreign_ranges(int xc_handle, uint32_t dom,
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privcmd_mmap_entry_t *entries, int nr);
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#endif /* __XC_PRIVATE_H__ */
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