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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kernel-entry-init.h (738B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 *  Atheros AR71XX/AR724X/AR913X specific kernel entry setup
      4 *
      5 *  Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
      6 */
      7#ifndef __ASM_MACH_ATH79_KERNEL_ENTRY_H
      8#define __ASM_MACH_ATH79_KERNEL_ENTRY_H
      9
     10	/*
     11	 * Some bootloaders set the 'Kseg0 coherency algorithm' to
     12	 * 'Cacheable, noncoherent, write-through, no write allocate'
     13	 * and this cause performance issues. Let's go and change it to
     14	 * 'Cacheable, noncoherent, write-back, write allocate'
     15	 */
     16	.macro	kernel_entry_setup
     17	mfc0	t0, CP0_CONFIG
     18	li	t1, ~CONF_CM_CMASK
     19	and	t0, t1
     20	ori	t0, CONF_CM_CACHABLE_NONCOHERENT
     21	mtc0	t0, CP0_CONFIG
     22	nop
     23	.endm
     24
     25	.macro	smp_slave_setup
     26	.endm
     27
     28#endif /* __ASM_MACH_ATH79_KERNEL_ENTRY_H */