1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2012-2015 - ARM Ltd 4 * Author: Marc Zyngier <marc.zyngier@arm.com> 5 */ 6 7 #include <hyp/sysreg-sr.h> 8 9 #include <linux/compiler.h> 10 #include <linux/kvm_host.h> 11 12 #include <asm/kprobes.h> 13 #include <asm/kvm_asm.h> 14 #include <asm/kvm_emulate.h> 15 #include <asm/kvm_hyp.h> 16 17 /* 18 * Non-VHE: Both host and guest must save everything. 19 */ 20 21 void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt) 22 { 23 __sysreg_save_el1_state(ctxt); 24 __sysreg_save_common_state(ctxt); 25 __sysreg_save_user_state(ctxt); 26 __sysreg_save_el2_return_state(ctxt); 27 } 28 29 void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt) 30 { 31 __sysreg_restore_el1_state(ctxt); 32 __sysreg_restore_common_state(ctxt); 33 __sysreg_restore_user_state(ctxt); 34 __sysreg_restore_el2_return_state(ctxt); 35 } 36 37 void __kvm_enable_ssbs(void) 38 { 39 u64 tmp; 40 41 asm volatile( 42 "mrs %0, sctlr_el2\n" 43 "orr %0, %0, %1\n" 44 "msr sctlr_el2, %0" 45 : "=&r" (tmp) : "L" (SCTLR_ELx_DSSBS)); 46 } 47