cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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kexec.h (2672B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef __ASM_SH_KEXEC_H
      3#define __ASM_SH_KEXEC_H
      4
      5#include <asm/ptrace.h>
      6#include <asm/string.h>
      7#include <linux/kernel.h>
      8
      9/*
     10 * KEXEC_SOURCE_MEMORY_LIMIT maximum page get_free_page can return.
     11 * I.e. Maximum page that is mapped directly into kernel memory,
     12 * and kmap is not required.
     13 *
     14 * Someone correct me if FIXADDR_START - PAGEOFFSET is not the correct
     15 * calculation for the amount of memory directly mappable into the
     16 * kernel memory space.
     17 */
     18
     19/* Maximum physical address we can use pages from */
     20#define KEXEC_SOURCE_MEMORY_LIMIT (-1UL)
     21/* Maximum address we can reach in physical address mode */
     22#define KEXEC_DESTINATION_MEMORY_LIMIT (-1UL)
     23/* Maximum address we can use for the control code buffer */
     24#define KEXEC_CONTROL_MEMORY_LIMIT TASK_SIZE
     25
     26#define KEXEC_CONTROL_PAGE_SIZE	4096
     27
     28/* The native architecture */
     29#define KEXEC_ARCH KEXEC_ARCH_SH
     30
     31#ifdef CONFIG_KEXEC
     32/* arch/sh/kernel/machine_kexec.c */
     33void reserve_crashkernel(void);
     34
     35static inline void crash_setup_regs(struct pt_regs *newregs,
     36				    struct pt_regs *oldregs)
     37{
     38	if (oldregs)
     39		memcpy(newregs, oldregs, sizeof(*newregs));
     40	else {
     41		__asm__ __volatile__ ("mov r0, %0" : "=r" (newregs->regs[0]));
     42		__asm__ __volatile__ ("mov r1, %0" : "=r" (newregs->regs[1]));
     43		__asm__ __volatile__ ("mov r2, %0" : "=r" (newregs->regs[2]));
     44		__asm__ __volatile__ ("mov r3, %0" : "=r" (newregs->regs[3]));
     45		__asm__ __volatile__ ("mov r4, %0" : "=r" (newregs->regs[4]));
     46		__asm__ __volatile__ ("mov r5, %0" : "=r" (newregs->regs[5]));
     47		__asm__ __volatile__ ("mov r6, %0" : "=r" (newregs->regs[6]));
     48		__asm__ __volatile__ ("mov r7, %0" : "=r" (newregs->regs[7]));
     49		__asm__ __volatile__ ("mov r8, %0" : "=r" (newregs->regs[8]));
     50		__asm__ __volatile__ ("mov r9, %0" : "=r" (newregs->regs[9]));
     51		__asm__ __volatile__ ("mov r10, %0" : "=r" (newregs->regs[10]));
     52		__asm__ __volatile__ ("mov r11, %0" : "=r" (newregs->regs[11]));
     53		__asm__ __volatile__ ("mov r12, %0" : "=r" (newregs->regs[12]));
     54		__asm__ __volatile__ ("mov r13, %0" : "=r" (newregs->regs[13]));
     55		__asm__ __volatile__ ("mov r14, %0" : "=r" (newregs->regs[14]));
     56		__asm__ __volatile__ ("mov r15, %0" : "=r" (newregs->regs[15]));
     57
     58		__asm__ __volatile__ ("sts pr, %0" : "=r" (newregs->pr));
     59		__asm__ __volatile__ ("sts macl, %0" : "=r" (newregs->macl));
     60		__asm__ __volatile__ ("sts mach, %0" : "=r" (newregs->mach));
     61
     62		__asm__ __volatile__ ("stc gbr, %0" : "=r" (newregs->gbr));
     63		__asm__ __volatile__ ("stc sr, %0" : "=r" (newregs->sr));
     64
     65		newregs->pc = _THIS_IP_;
     66	}
     67}
     68#else
     69static inline void reserve_crashkernel(void) { }
     70#endif /* CONFIG_KEXEC */
     71
     72#endif /* __ASM_SH_KEXEC_H */