18c2ecf20Sopenharmony_ci// SPDX-License-Identifier: GPL-2.0-only 28c2ecf20Sopenharmony_ci/* 38c2ecf20Sopenharmony_ci * Copyright (C) 2012-2015 - ARM Ltd 48c2ecf20Sopenharmony_ci * Author: Marc Zyngier <marc.zyngier@arm.com> 58c2ecf20Sopenharmony_ci */ 68c2ecf20Sopenharmony_ci 78c2ecf20Sopenharmony_ci#include <hyp/sysreg-sr.h> 88c2ecf20Sopenharmony_ci 98c2ecf20Sopenharmony_ci#include <linux/compiler.h> 108c2ecf20Sopenharmony_ci#include <linux/kvm_host.h> 118c2ecf20Sopenharmony_ci 128c2ecf20Sopenharmony_ci#include <asm/kprobes.h> 138c2ecf20Sopenharmony_ci#include <asm/kvm_asm.h> 148c2ecf20Sopenharmony_ci#include <asm/kvm_emulate.h> 158c2ecf20Sopenharmony_ci#include <asm/kvm_hyp.h> 168c2ecf20Sopenharmony_ci 178c2ecf20Sopenharmony_ci/* 188c2ecf20Sopenharmony_ci * Non-VHE: Both host and guest must save everything. 198c2ecf20Sopenharmony_ci */ 208c2ecf20Sopenharmony_ci 218c2ecf20Sopenharmony_civoid __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt) 228c2ecf20Sopenharmony_ci{ 238c2ecf20Sopenharmony_ci __sysreg_save_el1_state(ctxt); 248c2ecf20Sopenharmony_ci __sysreg_save_common_state(ctxt); 258c2ecf20Sopenharmony_ci __sysreg_save_user_state(ctxt); 268c2ecf20Sopenharmony_ci __sysreg_save_el2_return_state(ctxt); 278c2ecf20Sopenharmony_ci} 288c2ecf20Sopenharmony_ci 298c2ecf20Sopenharmony_civoid __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt) 308c2ecf20Sopenharmony_ci{ 318c2ecf20Sopenharmony_ci __sysreg_restore_el1_state(ctxt); 328c2ecf20Sopenharmony_ci __sysreg_restore_common_state(ctxt); 338c2ecf20Sopenharmony_ci __sysreg_restore_user_state(ctxt); 348c2ecf20Sopenharmony_ci __sysreg_restore_el2_return_state(ctxt); 358c2ecf20Sopenharmony_ci} 368c2ecf20Sopenharmony_ci 378c2ecf20Sopenharmony_civoid __kvm_enable_ssbs(void) 388c2ecf20Sopenharmony_ci{ 398c2ecf20Sopenharmony_ci u64 tmp; 408c2ecf20Sopenharmony_ci 418c2ecf20Sopenharmony_ci asm volatile( 428c2ecf20Sopenharmony_ci "mrs %0, sctlr_el2\n" 438c2ecf20Sopenharmony_ci "orr %0, %0, %1\n" 448c2ecf20Sopenharmony_ci "msr sctlr_el2, %0" 458c2ecf20Sopenharmony_ci : "=&r" (tmp) : "L" (SCTLR_ELx_DSSBS)); 468c2ecf20Sopenharmony_ci} 47