1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Common place for both 32- and 64-bit entry routines. 4 */ 5 6#include <linux/linkage.h> 7#include <asm/export.h> 8#include <asm/msr-index.h> 9#include <asm/unwind_hints.h> 10#include <asm/segment.h> 11#include <asm/cache.h> 12 13.pushsection .noinstr.text, "ax" 14 15SYM_FUNC_START(entry_ibpb) 16 movl $MSR_IA32_PRED_CMD, %ecx 17 movl $PRED_CMD_IBPB, %eax 18 xorl %edx, %edx 19 wrmsr 20 RET 21SYM_FUNC_END(entry_ibpb) 22/* For KVM */ 23EXPORT_SYMBOL_GPL(entry_ibpb); 24 25.popsection 26 27/* 28 * Define the VERW operand that is disguised as entry code so that 29 * it can be referenced with KPTI enabled. This ensure VERW can be 30 * used late in exit-to-user path after page tables are switched. 31 */ 32.pushsection .entry.text, "ax" 33 34.align L1_CACHE_BYTES, 0xcc 35SYM_CODE_START_NOALIGN(mds_verw_sel) 36 UNWIND_HINT_UNDEFINED 37 ANNOTATE_NOENDBR 38 .word __KERNEL_DS 39.align L1_CACHE_BYTES, 0xcc 40SYM_CODE_END(mds_verw_sel); 41/* For KVM */ 42EXPORT_SYMBOL_GPL(mds_verw_sel); 43 44.popsection 45 46