1/* SPDX-License-Identifier: GPL-2.0 */ 2/* 3 * Common place for both 32- and 64-bit entry routines. 4 */ 5 6#include <linux/export.h> 7#include <linux/linkage.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#include "calling.h" 14 15.pushsection .noinstr.text, "ax" 16 17SYM_FUNC_START(entry_ibpb) 18 movl $MSR_IA32_PRED_CMD, %ecx 19 movl $PRED_CMD_IBPB, %eax 20 xorl %edx, %edx 21 wrmsr 22 RET 23SYM_FUNC_END(entry_ibpb) 24/* For KVM */ 25EXPORT_SYMBOL_GPL(entry_ibpb); 26 27.popsection 28 29/* 30 * Define the VERW operand that is disguised as entry code so that 31 * it can be referenced with KPTI enabled. This ensure VERW can be 32 * used late in exit-to-user path after page tables are switched. 33 */ 34.pushsection .entry.text, "ax" 35 36.align L1_CACHE_BYTES, 0xcc 37SYM_CODE_START_NOALIGN(mds_verw_sel) 38 UNWIND_HINT_UNDEFINED 39 ANNOTATE_NOENDBR 40 .word __KERNEL_DS 41.align L1_CACHE_BYTES, 0xcc 42SYM_CODE_END(mds_verw_sel); 43/* For KVM */ 44EXPORT_SYMBOL_GPL(mds_verw_sel); 45 46.popsection 47 48THUNK warn_thunk_thunk, __warn_thunk 49