515 lines
		
	
	
	
		
			12 KiB
			
		
	
	
	
		
			C
		
	
	
	
	
	
		
		
			
		
	
	
			515 lines
		
	
	
	
		
			12 KiB
			
		
	
	
	
		
			C
		
	
	
	
	
	
|   | /******************************************************************************
 | ||
|  |  * linux/arch/ia64/xen/paravirt_patch.c | ||
|  |  * | ||
|  |  * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> | ||
|  |  *                    VA Linux Systems Japan K.K. | ||
|  |  * | ||
|  |  * 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 <linux/init.h>
 | ||
|  | #include <asm/intrinsics.h>
 | ||
|  | #include <asm/kprobes.h>
 | ||
|  | #include <asm/paravirt.h>
 | ||
|  | #include <asm/paravirt_patch.h>
 | ||
|  | 
 | ||
|  | typedef union ia64_inst { | ||
|  |         struct { | ||
|  | 		unsigned long long qp : 6; | ||
|  | 		unsigned long long : 31; | ||
|  | 		unsigned long long opcode : 4; | ||
|  | 		unsigned long long reserved : 23; | ||
|  |         } generic; | ||
|  |         unsigned long long l; | ||
|  | } ia64_inst_t; | ||
|  | 
 | ||
|  | /*
 | ||
|  |  * flush_icache_range() can't be used here. | ||
|  |  * we are here before cpu_init() which initializes | ||
|  |  * ia64_i_cache_stride_shift. flush_icache_range() uses it. | ||
|  |  */ | ||
|  | void __init_or_module | ||
|  | paravirt_flush_i_cache_range(const void *instr, unsigned long size) | ||
|  | { | ||
|  | 	extern void paravirt_fc_i(const void *addr); | ||
|  | 	unsigned long i; | ||
|  | 
 | ||
|  | 	for (i = 0; i < size; i += sizeof(bundle_t)) | ||
|  | 		paravirt_fc_i(instr + i); | ||
|  | } | ||
|  | 
 | ||
|  | bundle_t* __init_or_module | ||
|  | paravirt_get_bundle(unsigned long tag) | ||
|  | { | ||
|  | 	return (bundle_t *)(tag & ~3UL); | ||
|  | } | ||
|  | 
 | ||
|  | unsigned long __init_or_module | ||
|  | paravirt_get_slot(unsigned long tag) | ||
|  | { | ||
|  | 	return tag & 3UL; | ||
|  | } | ||
|  | 
 | ||
|  | unsigned long __init_or_module | ||
|  | paravirt_get_num_inst(unsigned long stag, unsigned long etag) | ||
|  | { | ||
|  | 	bundle_t *sbundle = paravirt_get_bundle(stag); | ||
|  | 	unsigned long sslot = paravirt_get_slot(stag); | ||
|  | 	bundle_t *ebundle = paravirt_get_bundle(etag); | ||
|  | 	unsigned long eslot = paravirt_get_slot(etag); | ||
|  | 
 | ||
|  | 	return (ebundle - sbundle) * 3 + eslot - sslot + 1; | ||
|  | } | ||
|  | 
 | ||
|  | unsigned long __init_or_module | ||
|  | paravirt_get_next_tag(unsigned long tag) | ||
|  | { | ||
|  | 	unsigned long slot = paravirt_get_slot(tag); | ||
|  | 
 | ||
|  | 	switch (slot) { | ||
|  | 	case 0: | ||
|  | 	case 1: | ||
|  | 		return tag + 1; | ||
|  | 	case 2: { | ||
|  | 		bundle_t *bundle = paravirt_get_bundle(tag); | ||
|  | 		return (unsigned long)(bundle + 1); | ||
|  | 	} | ||
|  | 	default: | ||
|  | 		BUG(); | ||
|  | 	} | ||
|  | 	/* NOTREACHED */ | ||
|  | } | ||
|  | 
 | ||
|  | ia64_inst_t __init_or_module | ||
|  | paravirt_read_slot0(const bundle_t *bundle) | ||
|  | { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	inst.l = bundle->quad0.slot0; | ||
|  | 	return inst; | ||
|  | } | ||
|  | 
 | ||
|  | ia64_inst_t __init_or_module | ||
|  | paravirt_read_slot1(const bundle_t *bundle) | ||
|  | { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	inst.l = bundle->quad0.slot1_p0 | | ||
|  | 		((unsigned long long)bundle->quad1.slot1_p1 << 18UL); | ||
|  | 	return inst; | ||
|  | } | ||
|  | 
 | ||
|  | ia64_inst_t __init_or_module | ||
|  | paravirt_read_slot2(const bundle_t *bundle) | ||
|  | { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	inst.l = bundle->quad1.slot2; | ||
|  | 	return inst; | ||
|  | } | ||
|  | 
 | ||
|  | ia64_inst_t __init_or_module | ||
|  | paravirt_read_inst(unsigned long tag) | ||
|  | { | ||
|  | 	bundle_t *bundle = paravirt_get_bundle(tag); | ||
|  | 	unsigned long slot = paravirt_get_slot(tag); | ||
|  | 
 | ||
|  | 	switch (slot) { | ||
|  | 	case 0: | ||
|  | 		return paravirt_read_slot0(bundle); | ||
|  | 	case 1: | ||
|  | 		return paravirt_read_slot1(bundle); | ||
|  | 	case 2: | ||
|  | 		return paravirt_read_slot2(bundle); | ||
|  | 	default: | ||
|  | 		BUG(); | ||
|  | 	} | ||
|  | 	/* NOTREACHED */ | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_write_slot0(bundle_t *bundle, ia64_inst_t inst) | ||
|  | { | ||
|  | 	bundle->quad0.slot0 = inst.l; | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_write_slot1(bundle_t *bundle, ia64_inst_t inst) | ||
|  | { | ||
|  | 	bundle->quad0.slot1_p0 = inst.l; | ||
|  | 	bundle->quad1.slot1_p1 = inst.l >> 18UL; | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_write_slot2(bundle_t *bundle, ia64_inst_t inst) | ||
|  | { | ||
|  | 	bundle->quad1.slot2 = inst.l; | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_write_inst(unsigned long tag, ia64_inst_t inst) | ||
|  | { | ||
|  | 	bundle_t *bundle = paravirt_get_bundle(tag); | ||
|  | 	unsigned long slot = paravirt_get_slot(tag); | ||
|  | 
 | ||
|  | 	switch (slot) { | ||
|  | 	case 0: | ||
|  | 		paravirt_write_slot0(bundle, inst); | ||
|  | 		break; | ||
|  | 	case 1: | ||
|  | 		paravirt_write_slot1(bundle, inst); | ||
|  | 		break; | ||
|  | 	case 2: | ||
|  | 		paravirt_write_slot2(bundle, inst); | ||
|  | 		break; | ||
|  | 	default: | ||
|  | 		BUG(); | ||
|  | 		break; | ||
|  | 	} | ||
|  | 	paravirt_flush_i_cache_range(bundle, sizeof(*bundle)); | ||
|  | } | ||
|  | 
 | ||
|  | /* for debug */ | ||
|  | void | ||
|  | paravirt_print_bundle(const bundle_t *bundle) | ||
|  | { | ||
|  | 	const unsigned long *quad = (const unsigned long *)bundle; | ||
|  | 	ia64_inst_t slot0 = paravirt_read_slot0(bundle); | ||
|  | 	ia64_inst_t slot1 = paravirt_read_slot1(bundle); | ||
|  | 	ia64_inst_t slot2 = paravirt_read_slot2(bundle); | ||
|  | 
 | ||
|  | 	printk(KERN_DEBUG | ||
|  | 	       "bundle 0x%p 0x%016lx 0x%016lx\n", bundle, quad[0], quad[1]); | ||
|  | 	printk(KERN_DEBUG | ||
|  | 	       "bundle template 0x%x\n", | ||
|  | 	       bundle->quad0.template); | ||
|  | 	printk(KERN_DEBUG | ||
|  | 	       "slot0 0x%lx slot1_p0 0x%lx slot1_p1 0x%lx slot2 0x%lx\n", | ||
|  | 	       (unsigned long)bundle->quad0.slot0, | ||
|  | 	       (unsigned long)bundle->quad0.slot1_p0, | ||
|  | 	       (unsigned long)bundle->quad1.slot1_p1, | ||
|  | 	       (unsigned long)bundle->quad1.slot2); | ||
|  | 	printk(KERN_DEBUG | ||
|  | 	       "slot0 0x%016llx slot1 0x%016llx slot2 0x%016llx\n", | ||
|  | 	       slot0.l, slot1.l, slot2.l); | ||
|  | } | ||
|  | 
 | ||
|  | static int noreplace_paravirt __init_or_module = 0; | ||
|  | 
 | ||
|  | static int __init setup_noreplace_paravirt(char *str) | ||
|  | { | ||
|  | 	noreplace_paravirt = 1; | ||
|  | 	return 1; | ||
|  | } | ||
|  | __setup("noreplace-paravirt", setup_noreplace_paravirt); | ||
|  | 
 | ||
|  | #ifdef ASM_SUPPORTED
 | ||
|  | static void __init_or_module | ||
|  | fill_nop_bundle(void *sbundle, void *ebundle) | ||
|  | { | ||
|  | 	extern const char paravirt_nop_bundle[]; | ||
|  | 	extern const unsigned long paravirt_nop_bundle_size; | ||
|  | 
 | ||
|  | 	void *bundle = sbundle; | ||
|  | 
 | ||
|  | 	BUG_ON((((unsigned long)sbundle) % sizeof(bundle_t)) != 0); | ||
|  | 	BUG_ON((((unsigned long)ebundle) % sizeof(bundle_t)) != 0); | ||
|  | 
 | ||
|  | 	while (bundle < ebundle) { | ||
|  | 		memcpy(bundle, paravirt_nop_bundle, paravirt_nop_bundle_size); | ||
|  | 
 | ||
|  | 		bundle += paravirt_nop_bundle_size; | ||
|  | 	} | ||
|  | } | ||
|  | 
 | ||
|  | /* helper function */ | ||
|  | unsigned long __init_or_module | ||
|  | __paravirt_patch_apply_bundle(void *sbundle, void *ebundle, unsigned long type, | ||
|  | 			      const struct paravirt_patch_bundle_elem *elems, | ||
|  | 			      unsigned long nelems, | ||
|  | 			      const struct paravirt_patch_bundle_elem **found) | ||
|  | { | ||
|  | 	unsigned long used = 0; | ||
|  | 	unsigned long i; | ||
|  | 
 | ||
|  | 	BUG_ON((((unsigned long)sbundle) % sizeof(bundle_t)) != 0); | ||
|  | 	BUG_ON((((unsigned long)ebundle) % sizeof(bundle_t)) != 0); | ||
|  | 
 | ||
|  | 	found = NULL; | ||
|  | 	for (i = 0; i < nelems; i++) { | ||
|  | 		const struct paravirt_patch_bundle_elem *p = &elems[i]; | ||
|  | 		if (p->type == type) { | ||
|  | 			unsigned long need = p->ebundle - p->sbundle; | ||
|  | 			unsigned long room = ebundle - sbundle; | ||
|  | 
 | ||
|  | 			if (found != NULL) | ||
|  | 				*found = p; | ||
|  | 
 | ||
|  | 			if (room < need) { | ||
|  | 				/* no room to replace. skip it */ | ||
|  | 				printk(KERN_DEBUG | ||
|  | 				       "the space is too small to put " | ||
|  | 				       "bundles. type %ld need %ld room %ld\n", | ||
|  | 				       type, need, room); | ||
|  | 				break; | ||
|  | 			} | ||
|  | 
 | ||
|  | 			used = need; | ||
|  | 			memcpy(sbundle, p->sbundle, used); | ||
|  | 			break; | ||
|  | 		} | ||
|  | 	} | ||
|  | 
 | ||
|  | 	return used; | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_patch_apply_bundle(const struct paravirt_patch_site_bundle *start, | ||
|  | 			    const struct paravirt_patch_site_bundle *end) | ||
|  | { | ||
|  | 	const struct paravirt_patch_site_bundle *p; | ||
|  | 
 | ||
|  | 	if (noreplace_paravirt) | ||
|  | 		return; | ||
|  | 	if (pv_init_ops.patch_bundle == NULL) | ||
|  | 		return; | ||
|  | 
 | ||
|  | 	for (p = start; p < end; p++) { | ||
|  | 		unsigned long used; | ||
|  | 
 | ||
|  | 		used = (*pv_init_ops.patch_bundle)(p->sbundle, p->ebundle, | ||
|  | 						   p->type); | ||
|  | 		if (used == 0) | ||
|  | 			continue; | ||
|  | 
 | ||
|  | 		fill_nop_bundle(p->sbundle + used, p->ebundle); | ||
|  | 		paravirt_flush_i_cache_range(p->sbundle, | ||
|  | 					     p->ebundle - p->sbundle); | ||
|  | 	} | ||
|  | 	ia64_sync_i(); | ||
|  | 	ia64_srlz_i(); | ||
|  | } | ||
|  | 
 | ||
|  | /*
 | ||
|  |  * nop.i, nop.m, nop.f instruction are same format. | ||
|  |  * but nop.b has differennt format. | ||
|  |  * This doesn't support nop.b for now. | ||
|  |  */ | ||
|  | static void __init_or_module | ||
|  | fill_nop_inst(unsigned long stag, unsigned long etag) | ||
|  | { | ||
|  | 	extern const bundle_t paravirt_nop_mfi_inst_bundle[]; | ||
|  | 	unsigned long tag; | ||
|  | 	const ia64_inst_t nop_inst = | ||
|  | 		paravirt_read_slot0(paravirt_nop_mfi_inst_bundle); | ||
|  | 
 | ||
|  | 	for (tag = stag; tag < etag; tag = paravirt_get_next_tag(tag)) | ||
|  | 		paravirt_write_inst(tag, nop_inst); | ||
|  | } | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_patch_apply_inst(const struct paravirt_patch_site_inst *start, | ||
|  | 			  const struct paravirt_patch_site_inst *end) | ||
|  | { | ||
|  | 	const struct paravirt_patch_site_inst *p; | ||
|  | 
 | ||
|  | 	if (noreplace_paravirt) | ||
|  | 		return; | ||
|  | 	if (pv_init_ops.patch_inst == NULL) | ||
|  | 		return; | ||
|  | 
 | ||
|  | 	for (p = start; p < end; p++) { | ||
|  | 		unsigned long tag; | ||
|  | 		bundle_t *sbundle; | ||
|  | 		bundle_t *ebundle; | ||
|  | 
 | ||
|  | 		tag = (*pv_init_ops.patch_inst)(p->stag, p->etag, p->type); | ||
|  | 		if (tag == p->stag) | ||
|  | 			continue; | ||
|  | 
 | ||
|  | 		fill_nop_inst(tag, p->etag); | ||
|  | 		sbundle = paravirt_get_bundle(p->stag); | ||
|  | 		ebundle = paravirt_get_bundle(p->etag) + 1; | ||
|  | 		paravirt_flush_i_cache_range(sbundle, (ebundle - sbundle) * | ||
|  | 					     sizeof(bundle_t)); | ||
|  | 	} | ||
|  | 	ia64_sync_i(); | ||
|  | 	ia64_srlz_i(); | ||
|  | } | ||
|  | #endif /* ASM_SUPPOTED */
 | ||
|  | 
 | ||
|  | /* brl.cond.sptk.many <target64> X3 */ | ||
|  | typedef union inst_x3_op { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	struct { | ||
|  | 		unsigned long qp: 6; | ||
|  | 		unsigned long btyp: 3; | ||
|  | 		unsigned long unused: 3; | ||
|  | 		unsigned long p: 1; | ||
|  | 		unsigned long imm20b: 20; | ||
|  | 		unsigned long wh: 2; | ||
|  | 		unsigned long d: 1; | ||
|  | 		unsigned long i: 1; | ||
|  | 		unsigned long opcode: 4; | ||
|  | 	}; | ||
|  | 	unsigned long l; | ||
|  | } inst_x3_op_t; | ||
|  | 
 | ||
|  | typedef union inst_x3_imm { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	struct { | ||
|  | 		unsigned long unused: 2; | ||
|  | 		unsigned long imm39: 39; | ||
|  | 	}; | ||
|  | 	unsigned long l; | ||
|  | } inst_x3_imm_t; | ||
|  | 
 | ||
|  | void __init_or_module | ||
|  | paravirt_patch_reloc_brl(unsigned long tag, const void *target) | ||
|  | { | ||
|  | 	unsigned long tag_op = paravirt_get_next_tag(tag); | ||
|  | 	unsigned long tag_imm = tag; | ||
|  | 	bundle_t *bundle = paravirt_get_bundle(tag); | ||
|  | 
 | ||
|  | 	ia64_inst_t inst_op = paravirt_read_inst(tag_op); | ||
|  | 	ia64_inst_t inst_imm = paravirt_read_inst(tag_imm); | ||
|  | 
 | ||
|  | 	inst_x3_op_t inst_x3_op = { .l = inst_op.l }; | ||
|  | 	inst_x3_imm_t inst_x3_imm = { .l = inst_imm.l }; | ||
|  | 
 | ||
|  | 	unsigned long imm60 = | ||
|  | 		((unsigned long)target - (unsigned long)bundle) >> 4; | ||
|  | 
 | ||
|  | 	BUG_ON(paravirt_get_slot(tag) != 1); /* MLX */ | ||
|  | 	BUG_ON(((unsigned long)target & (sizeof(bundle_t) - 1)) != 0); | ||
|  | 
 | ||
|  | 	/* imm60[59] 1bit */ | ||
|  | 	inst_x3_op.i = (imm60 >> 59) & 1; | ||
|  | 	/* imm60[19:0] 20bit */ | ||
|  | 	inst_x3_op.imm20b = imm60 & ((1UL << 20) - 1); | ||
|  | 	/* imm60[58:20] 39bit */ | ||
|  | 	inst_x3_imm.imm39 = (imm60 >> 20) & ((1UL << 39) - 1); | ||
|  | 
 | ||
|  | 	inst_op.l = inst_x3_op.l; | ||
|  | 	inst_imm.l = inst_x3_imm.l; | ||
|  | 
 | ||
|  | 	paravirt_write_inst(tag_op, inst_op); | ||
|  | 	paravirt_write_inst(tag_imm, inst_imm); | ||
|  | } | ||
|  | 
 | ||
|  | /* br.cond.sptk.many <target25>	B1 */ | ||
|  | typedef union inst_b1 { | ||
|  | 	ia64_inst_t inst; | ||
|  | 	struct { | ||
|  | 		unsigned long qp: 6; | ||
|  | 		unsigned long btype: 3; | ||
|  | 		unsigned long unused: 3; | ||
|  | 		unsigned long p: 1; | ||
|  | 		unsigned long imm20b: 20; | ||
|  | 		unsigned long wh: 2; | ||
|  | 		unsigned long d: 1; | ||
|  | 		unsigned long s: 1; | ||
|  | 		unsigned long opcode: 4; | ||
|  | 	}; | ||
|  | 	unsigned long l; | ||
|  | } inst_b1_t; | ||
|  | 
 | ||
|  | void __init | ||
|  | paravirt_patch_reloc_br(unsigned long tag, const void *target) | ||
|  | { | ||
|  | 	bundle_t *bundle = paravirt_get_bundle(tag); | ||
|  | 	ia64_inst_t inst = paravirt_read_inst(tag); | ||
|  | 	unsigned long target25 = (unsigned long)target - (unsigned long)bundle; | ||
|  | 	inst_b1_t inst_b1; | ||
|  | 
 | ||
|  | 	BUG_ON(((unsigned long)target & (sizeof(bundle_t) - 1)) != 0); | ||
|  | 
 | ||
|  | 	inst_b1.l = inst.l; | ||
|  | 	if (target25 & (1UL << 63)) | ||
|  | 		inst_b1.s = 1; | ||
|  | 	else | ||
|  | 		inst_b1.s = 0; | ||
|  | 
 | ||
|  | 	inst_b1.imm20b = target25 >> 4; | ||
|  | 	inst.l = inst_b1.l; | ||
|  | 
 | ||
|  | 	paravirt_write_inst(tag, inst); | ||
|  | } | ||
|  | 
 | ||
|  | void __init | ||
|  | __paravirt_patch_apply_branch( | ||
|  | 	unsigned long tag, unsigned long type, | ||
|  | 	const struct paravirt_patch_branch_target *entries, | ||
|  | 	unsigned int nr_entries) | ||
|  | { | ||
|  | 	unsigned int i; | ||
|  | 	for (i = 0; i < nr_entries; i++) { | ||
|  | 		if (entries[i].type == type) { | ||
|  | 			paravirt_patch_reloc_br(tag, entries[i].entry); | ||
|  | 			break; | ||
|  | 		} | ||
|  | 	} | ||
|  | } | ||
|  | 
 | ||
|  | static void __init | ||
|  | paravirt_patch_apply_branch(const struct paravirt_patch_site_branch *start, | ||
|  | 			    const struct paravirt_patch_site_branch *end) | ||
|  | { | ||
|  | 	const struct paravirt_patch_site_branch *p; | ||
|  | 
 | ||
|  | 	if (noreplace_paravirt) | ||
|  | 		return; | ||
|  | 	if (pv_init_ops.patch_branch == NULL) | ||
|  | 		return; | ||
|  | 
 | ||
|  | 	for (p = start; p < end; p++) | ||
|  | 		(*pv_init_ops.patch_branch)(p->tag, p->type); | ||
|  | 
 | ||
|  | 	ia64_sync_i(); | ||
|  | 	ia64_srlz_i(); | ||
|  | } | ||
|  | 
 | ||
|  | void __init | ||
|  | paravirt_patch_apply(void) | ||
|  | { | ||
|  | 	extern const char __start_paravirt_bundles[]; | ||
|  | 	extern const char __stop_paravirt_bundles[]; | ||
|  | 	extern const char __start_paravirt_insts[]; | ||
|  | 	extern const char __stop_paravirt_insts[]; | ||
|  | 	extern const char __start_paravirt_branches[]; | ||
|  | 	extern const char __stop_paravirt_branches[]; | ||
|  | 
 | ||
|  | 	paravirt_patch_apply_bundle((const struct paravirt_patch_site_bundle *) | ||
|  | 				    __start_paravirt_bundles, | ||
|  | 				    (const struct paravirt_patch_site_bundle *) | ||
|  | 				    __stop_paravirt_bundles); | ||
|  | 	paravirt_patch_apply_inst((const struct paravirt_patch_site_inst *) | ||
|  | 				  __start_paravirt_insts, | ||
|  | 				  (const struct paravirt_patch_site_inst *) | ||
|  | 				  __stop_paravirt_insts); | ||
|  | 	paravirt_patch_apply_branch((const struct paravirt_patch_site_branch *) | ||
|  | 				    __start_paravirt_branches, | ||
|  | 				    (const struct paravirt_patch_site_branch *) | ||
|  | 				    __stop_paravirt_branches); | ||
|  | } | ||
|  | 
 | ||
|  | /*
 | ||
|  |  * Local variables: | ||
|  |  * mode: C | ||
|  |  * c-set-style: "linux" | ||
|  |  * c-basic-offset: 8 | ||
|  |  * tab-width: 8 | ||
|  |  * indent-tabs-mode: t | ||
|  |  * End: | ||
|  |  */ |