/****************************************************************************** * platform_hypercall.c * * Hardware platform operations. Intended for use by domain-0 kernel. * * Copyright (c) 2002-2006, K Fraser */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "cpu/mtrr/mtrr.h" #include extern uint16_t boot_edid_caps; extern uint8_t boot_edid_info[]; #ifndef COMPAT typedef long ret_t; DEFINE_SPINLOCK(xenpf_lock); # undef copy_from_compat # define copy_from_compat copy_from_guest # undef copy_to_compat # define copy_to_compat copy_to_guest # undef guest_from_compat_handle # define guest_from_compat_handle(x,y) ((x)=(y)) #else extern spinlock_t xenpf_lock; #endif static DEFINE_PER_CPU(uint64_t, freq); extern long set_cx_pminfo(uint32_t cpu, struct xen_processor_power *power); static long cpu_frequency_change_helper(void *data) { return cpu_frequency_change(this_cpu(freq)); } ret_t do_platform_op(XEN_GUEST_HANDLE(xen_platform_op_t) u_xenpf_op) { ret_t ret = 0; struct xen_platform_op curop, *op = &curop; if ( !IS_PRIV(current->domain) ) return -EPERM; if ( copy_from_guest(op, u_xenpf_op, 1) ) return -EFAULT; if ( op->interface_version != XENPF_INTERFACE_VERSION ) return -EACCES; spin_lock(&xenpf_lock); switch ( op->cmd ) { case XENPF_settime: { ret = xsm_xen_settime(); if ( ret ) break; do_settime(op->u.settime.secs, op->u.settime.nsecs, op->u.settime.system_time); ret = 0; } break; case XENPF_add_memtype: { ret = xsm_memtype(op->cmd); if ( ret ) break; ret = mtrr_add_page( op->u.add_memtype.mfn, op->u.add_memtype.nr_mfns, op->u.add_memtype.type, 1); if ( ret >= 0 ) { op->u.add_memtype.handle = 0; op->u.add_memtype.reg = ret; ret = copy_to_guest(u_xenpf_op, op, 1) ? -EFAULT : 0; if ( ret != 0 ) mtrr_del_page(ret, 0, 0); } } break; case XENPF_del_memtype: { ret = xsm_memtype(op->cmd); if ( ret ) break; if (op->u.del_memtype.handle == 0 /* mtrr/main.c otherwise does a lookup */ && (int)op->u.del_memtype.reg >= 0) { ret = mtrr_del_page(op->u.del_memtype.reg, 0, 0); if ( ret > 0 ) ret = 0; } else ret = -EINVAL; } break; case XENPF_read_memtype: { unsigned long mfn, nr_mfns; mtrr_type type; ret = xsm_memtype(op->cmd); if ( ret ) break; ret = -EINVAL; if ( op->u.read_memtype.reg < num_var_ranges ) { mtrr_if->get(op->u.read_memtype.reg, &mfn, &nr_mfns, &type); op->u.read_memtype.mfn = mfn; op->u.read_memtype.nr_mfns = nr_mfns; op->u.read_memtype.type = type; ret = copy_to_guest(u_xenpf_op, op, 1) ? -EFAULT : 0; } } break; case XENPF_microcode_update: { XEN_GUEST_HANDLE(const_void) data; ret = xsm_microcode(); if ( ret ) break; guest_from_compat_handle(data, op->u.microcode.data); ret = microcode_update(data, op->u.microcode.length); } break; case XENPF_platform_quirk: { extern int opt_noirqbalance; int quirk_id = op->u.platform_quirk.quirk_id; ret = xsm_platform_quirk(quirk_id); if ( ret ) break; switch ( quirk_id ) { case QUIRK_NOIRQBALANCING: printk("Platform quirk -- Disabling IRQ balancing/affinity.\n"); opt_noirqbalance = 1; setup_ioapic_dest(); break; case QUIRK_IOAPIC_BAD_REGSEL: case QUIRK_IOAPIC_GOOD_REGSEL: #ifndef sis_apic_bug sis_apic_bug = (quirk_id == QUIRK_IOAPIC_BAD_REGSEL); dprintk(XENLOG_INFO, "Domain 0 says that IO-APIC REGSEL is %s\n", sis_apic_bug ? "bad" : "good"); #else BUG_ON(sis_apic_bug != (quirk_id == QUIRK_IOAPIC_BAD_REGSEL)); #endif break; default: ret = -EINVAL; break; } } break; case XENPF_firmware_info: ret = xsm_firmware_info(); if ( ret ) break; switch ( op->u.firmware_info.type ) { case XEN_FW_DISK_INFO: { const struct edd_info *info; u16 length; ret = -ESRCH; if ( op->u.firmware_info.index >= bootsym(boot_edd_info_nr) ) break; info = bootsym(boot_edd_info) + op->u.firmware_info.index; /* Transfer the EDD info block. */ ret = -EFAULT; if ( copy_from_compat(&length, op->u.firmware_info.u. disk_info.edd_params, 1) ) break; if ( length > info->edd_device_params.length ) length = info->edd_device_params.length; if ( copy_to_compat(op->u.firmware_info.u.disk_info.edd_params, (u8 *)&info->edd_device_params, length) ) break; if ( copy_to_compat(op->u.firmware_info.u.disk_info.edd_params, &length, 1) ) break; /* Transfer miscellaneous other information values. */ #define C(x) op->u.firmware_info.u.disk_info.x = info->x C(device); C(version); C(interface_support); C(legacy_max_cylinder); C(legacy_max_head); C(legacy_sectors_per_track); #undef C ret = (copy_field_to_guest(u_xenpf_op, op, u.firmware_info.u.disk_info) ? -EFAULT : 0); break; } case XEN_FW_DISK_MBR_SIGNATURE: { const struct mbr_signature *sig; ret = -ESRCH; 
/*
 * patch-cmdline.c - patch the kernel command line on rb532
 *
 * Copyright (C) 2006 Felix Fietkau <nbd@nbd.name>
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <string.h>

#define SEARCH_SPACE	(16 * 1024)
#define CMDLINE_MAX		512

int main(int argc, char **argv)
{
	int fd, found = 0, len, ret = -1;
	char *ptr, *p;
	unsigned int search_space;

	if (argc <= 2 || argc > 4) {
		fprintf(stderr, "Usage: %s <file> <cmdline> [size]\n", argv[0]);
		goto err1;
	} else if (argc == 3) {
		fprintf(stdout, "search space used is default of 16KB\n");
		search_space = SEARCH_SPACE;
	} else {
		search_space = atoi(argv[3]);
	}
	len = strlen(argv[2]);
	if (len + 9 > CMDLINE_MAX) {
		fprintf(stderr, "Command line string too long\n");
		goto err1;
	}
	
	if (((fd = open(argv[1], O_RDWR)) < 0) ||
		(ptr = (char *) mmap(0, search_space + CMDLINE_MAX, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0)) == (void *) (-1)) {
		fprintf(stderr, "Could not open kernel image");
		goto err2;
	}
	
	for (p = ptr; p < (ptr + search_space); p += 4) {
		if (memcmp(p, "CMDLINE:", 8) == 0) {
			found = 1;
			p += 8;
			break;
		}
	}
	if (!found) {
		fprintf(stderr, "Command line marker not found!\n");
		goto err3;
	}

	memset(p, 0, CMDLINE_MAX - 8);
	strcpy(p, argv[2]);
	msync(p, CMDLINE_MAX, MS_SYNC|MS_INVALIDATE);
	ret = 0;

err3:
	munmap((void *) ptr, len);
err2:
	if (fd > 0)
		close(fd);
err1:
	return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2026-02-21 04:22:55 +0000