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https://github.com/xen-project/xen.git
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88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/******************************************************************************
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* xc_misc.c
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*
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* Miscellaneous control interface functions.
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*/
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#include "xc_private.h"
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int xc_interface_open(void)
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{
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int fd = open("/proc/xen/privcmd", O_RDWR);
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if ( fd == -1 )
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PERROR("Could not obtain handle on privileged command interface");
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return fd;
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}
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int xc_interface_close(int xc_handle)
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{
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return close(xc_handle);
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}
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#define CONSOLE_RING_CLEAR 1
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int xc_readconsolering(int xc_handle,
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char *str,
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unsigned int max_chars,
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int clear)
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{
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int ret;
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dom0_op_t op;
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op.cmd = DOM0_READCONSOLE;
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op.u.readconsole.str = (unsigned long)str;
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op.u.readconsole.count = max_chars;
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op.u.readconsole.cmd = clear ? CONSOLE_RING_CLEAR : 0;
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if ( (ret = mlock(str, max_chars)) != 0 )
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return ret;
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if ( (ret = do_dom0_op(xc_handle, &op)) >= 0 )
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str[ret] = '\0';
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(void)munlock(str, max_chars);
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return ret;
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}
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int xc_physinfo(int xc_handle,
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xc_physinfo_t *put_info)
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{
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int ret;
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dom0_op_t op;
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dom0_physinfo_t *got_info = &op.u.physinfo;
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op.cmd = DOM0_PHYSINFO;
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op.interface_version = DOM0_INTERFACE_VERSION;
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if((ret = do_dom0_op(xc_handle, &op))) return ret;
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put_info->ht_per_core = got_info->ht_per_core;
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put_info->cores = got_info->cores;
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put_info->total_pages = got_info->total_pages;
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put_info->free_pages = got_info->free_pages;
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put_info->cpu_khz = got_info->cpu_khz;
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return 0;
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}
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int xc_sched_id(int xc_handle,
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int *sched_id)
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{
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int ret;
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dom0_op_t op;
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op.cmd = DOM0_SCHED_ID;
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op.interface_version = DOM0_INTERFACE_VERSION;
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if((ret = do_dom0_op(xc_handle, &op))) return ret;
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*sched_id = op.u.sched_id.sched_id;
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return 0;
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}
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