113aeb9b4SDavid Brazdil // SPDX-License-Identifier: GPL-2.0-only 213aeb9b4SDavid Brazdil /* 313aeb9b4SDavid Brazdil * Copyright (C) 2012-2015 - ARM Ltd 413aeb9b4SDavid Brazdil * Author: Marc Zyngier <marc.zyngier@arm.com> 513aeb9b4SDavid Brazdil */ 613aeb9b4SDavid Brazdil 713aeb9b4SDavid Brazdil #include <hyp/sysreg-sr.h> 813aeb9b4SDavid Brazdil 913aeb9b4SDavid Brazdil #include <linux/compiler.h> 1013aeb9b4SDavid Brazdil #include <linux/kvm_host.h> 1113aeb9b4SDavid Brazdil 1213aeb9b4SDavid Brazdil #include <asm/kprobes.h> 1313aeb9b4SDavid Brazdil #include <asm/kvm_asm.h> 1413aeb9b4SDavid Brazdil #include <asm/kvm_emulate.h> 1513aeb9b4SDavid Brazdil #include <asm/kvm_hyp.h> 1613aeb9b4SDavid Brazdil 1713aeb9b4SDavid Brazdil /* 1813aeb9b4SDavid Brazdil * Non-VHE: Both host and guest must save everything. 1913aeb9b4SDavid Brazdil */ 2013aeb9b4SDavid Brazdil 21*c50cb043SDavid Brazdil void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt) 2213aeb9b4SDavid Brazdil { 2313aeb9b4SDavid Brazdil __sysreg_save_el1_state(ctxt); 2413aeb9b4SDavid Brazdil __sysreg_save_common_state(ctxt); 2513aeb9b4SDavid Brazdil __sysreg_save_user_state(ctxt); 2613aeb9b4SDavid Brazdil __sysreg_save_el2_return_state(ctxt); 2713aeb9b4SDavid Brazdil } 2813aeb9b4SDavid Brazdil 29*c50cb043SDavid Brazdil void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt) 3013aeb9b4SDavid Brazdil { 3113aeb9b4SDavid Brazdil __sysreg_restore_el1_state(ctxt); 3213aeb9b4SDavid Brazdil __sysreg_restore_common_state(ctxt); 3313aeb9b4SDavid Brazdil __sysreg_restore_user_state(ctxt); 3413aeb9b4SDavid Brazdil __sysreg_restore_el2_return_state(ctxt); 3513aeb9b4SDavid Brazdil } 3613aeb9b4SDavid Brazdil 37*c50cb043SDavid Brazdil void __kvm_enable_ssbs(void) 3813aeb9b4SDavid Brazdil { 3913aeb9b4SDavid Brazdil u64 tmp; 4013aeb9b4SDavid Brazdil 4113aeb9b4SDavid Brazdil asm volatile( 4213aeb9b4SDavid Brazdil "mrs %0, sctlr_el2\n" 4313aeb9b4SDavid Brazdil "orr %0, %0, %1\n" 4413aeb9b4SDavid Brazdil "msr sctlr_el2, %0" 4513aeb9b4SDavid Brazdil : "=&r" (tmp) : "L" (SCTLR_ELx_DSSBS)); 4613aeb9b4SDavid Brazdil } 47