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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earlypgm.S (713B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2/*
      3 *    Copyright IBM Corp. 2006, 2007
      4 *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
      5 */
      6
      7#include <linux/linkage.h>
      8#include <asm/asm-offsets.h>
      9
     10ENTRY(early_pgm_check_handler)
     11	stmg	%r8,%r15,__LC_SAVE_AREA_SYNC
     12	aghi	%r15,-(STACK_FRAME_OVERHEAD+__PT_SIZE)
     13	la	%r11,STACK_FRAME_OVERHEAD(%r15)
     14	xc	__SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15)
     15	stmg	%r0,%r7,__PT_R0(%r11)
     16	mvc	__PT_PSW(16,%r11),__LC_PGM_OLD_PSW
     17	mvc	__PT_R8(64,%r11),__LC_SAVE_AREA_SYNC
     18	lgr	%r2,%r11
     19	brasl	%r14,__do_early_pgm_check
     20	mvc	__LC_RETURN_PSW(16),STACK_FRAME_OVERHEAD+__PT_PSW(%r15)
     21	lmg	%r0,%r15,STACK_FRAME_OVERHEAD+__PT_R0(%r15)
     22	lpswe	__LC_RETURN_PSW
     23ENDPROC(early_pgm_check_handler)