| segment.h (c4755613a1339ea77dbb15de75c9f74217209265) | segment.h (ffebbaedc8616cffe648202e364dce6a045d65a2) |
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| 1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_SEGMENT_H 3#define _ASM_X86_SEGMENT_H 4 5#include <linux/const.h> 6#include <asm/alternative.h> 7 8/* --- 210 unchanged lines hidden (view full) --- 219 220/* Bitmask of exception vectors which push an error code on the stack: */ 221#define EXCEPTION_ERRCODE_MASK 0x00027d00 222 223#define GDT_SIZE (GDT_ENTRIES*8) 224#define GDT_ENTRY_TLS_ENTRIES 3 225#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES* 8) 226 | 1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef _ASM_X86_SEGMENT_H 3#define _ASM_X86_SEGMENT_H 4 5#include <linux/const.h> 6#include <asm/alternative.h> 7 8/* --- 210 unchanged lines hidden (view full) --- 219 220/* Bitmask of exception vectors which push an error code on the stack: */ 221#define EXCEPTION_ERRCODE_MASK 0x00027d00 222 223#define GDT_SIZE (GDT_ENTRIES*8) 224#define GDT_ENTRY_TLS_ENTRIES 3 225#define TLS_SIZE (GDT_ENTRY_TLS_ENTRIES* 8) 226 |
| 227#ifdef CONFIG_X86_64 228 229/* Bit size and mask of CPU number stored in the per CPU data (and TSC_AUX) */ 230#define VDSO_CPU_SIZE 12 231#define VDSO_CPU_MASK 0xfff 232 233#ifndef __ASSEMBLY__ 234 235/* Helper functions to store/load CPU and node numbers */ 236 237static inline unsigned long vdso_encode_cpu_node(int cpu, unsigned long node) 238{ 239 return ((node << VDSO_CPU_SIZE) | cpu); 240} 241 242static inline void vdso_read_cpu_node(unsigned *cpu, unsigned *node) 243{ 244 unsigned int p; 245 246 /* 247 * Load CPU and node number from GDT. LSL is faster than RDTSCP 248 * and works on all CPUs. This is volatile so that it orders 249 * correctly with respect to barrier() and to keep GCC from cleverly 250 * hoisting it out of the calling function. 251 * 252 * If RDPID is available, use it. 253 */ 254 alternative_io ("lsl %[seg],%[p]", 255 ".byte 0xf3,0x0f,0xc7,0xf8", /* RDPID %eax/rax */ 256 X86_FEATURE_RDPID, 257 [p] "=a" (p), [seg] "r" (__CPU_NUMBER_SEG)); 258 259 if (cpu) 260 *cpu = (p & VDSO_CPU_MASK); 261 if (node) 262 *node = (p >> VDSO_CPU_SIZE); 263} 264 265#endif /* !__ASSEMBLY__ */ 266#endif /* CONFIG_X86_64 */ 267 |
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| 227#ifdef __KERNEL__ 228 229/* 230 * early_idt_handler_array is an array of entry points referenced in the 231 * early IDT. For simplicity, it's a real array with one entry point 232 * every nine bytes. That leaves room for an optional 'push $0' if the 233 * vector has no error code (two bytes), a 'push $vector_number' (two 234 * bytes), and a jump to the common entry code (up to five bytes). --- 105 unchanged lines hidden --- | 268#ifdef __KERNEL__ 269 270/* 271 * early_idt_handler_array is an array of entry points referenced in the 272 * early IDT. For simplicity, it's a real array with one entry point 273 * every nine bytes. That leaves room for an optional 'push $0' if the 274 * vector has no error code (two bytes), a 'push $vector_number' (two 275 * bytes), and a jump to the common entry code (up to five bytes). --- 105 unchanged lines hidden --- |