| /* |
| * Copyright (C) 2012-2015 - ARM Ltd |
| * Author: Marc Zyngier <marc.zyngier@arm.com> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| */ |
| |
| #include <linux/compiler.h> |
| #include <linux/kvm_host.h> |
| |
| #include <asm/kvm_asm.h> |
| #include <asm/kvm_hyp.h> |
| |
| /* Yes, this does nothing, on purpose */ |
| static void __hyp_text __sysreg_do_nothing(struct kvm_cpu_context *ctxt) { } |
| |
| /* |
| * Non-VHE: Both host and guest must save everything. |
| * |
| * VHE: Host must save tpidr*_el[01], actlr_el1, mdscr_el1, sp0, pc, |
| * pstate, and guest must save everything. |
| */ |
| |
| static void __hyp_text __sysreg_save_common_state(struct kvm_cpu_context *ctxt) |
| { |
| ctxt->sys_regs[ACTLR_EL1] = read_sysreg(actlr_el1); |
| ctxt->sys_regs[TPIDR_EL0] = read_sysreg(tpidr_el0); |
| ctxt->sys_regs[TPIDRRO_EL0] = read_sysreg(tpidrro_el0); |
| ctxt->sys_regs[TPIDR_EL1] = read_sysreg(tpidr_el1); |
| ctxt->sys_regs[MDSCR_EL1] = read_sysreg(mdscr_el1); |
| ctxt->gp_regs.regs.sp = read_sysreg(sp_el0); |
| ctxt->gp_regs.regs.pc = read_sysreg_el2(elr); |
| ctxt->gp_regs.regs.pstate = read_sysreg_el2(spsr); |
| } |
| |
| static void __hyp_text __sysreg_save_state(struct kvm_cpu_context *ctxt) |
| { |
| ctxt->sys_regs[MPIDR_EL1] = read_sysreg(vmpidr_el2); |
| ctxt->sys_regs[CSSELR_EL1] = read_sysreg(csselr_el1); |
| ctxt->sys_regs[SCTLR_EL1] = read_sysreg_el1(sctlr); |
| ctxt->sys_regs[CPACR_EL1] = read_sysreg_el1(cpacr); |
| ctxt->sys_regs[TTBR0_EL1] = read_sysreg_el1(ttbr0); |
| ctxt->sys_regs[TTBR1_EL1] = read_sysreg_el1(ttbr1); |
| ctxt->sys_regs[TCR_EL1] = read_sysreg_el1(tcr); |
| ctxt->sys_regs[ESR_EL1] = read_sysreg_el1(esr); |
| ctxt->sys_regs[AFSR0_EL1] = read_sysreg_el1(afsr0); |
| ctxt->sys_regs[AFSR1_EL1] = read_sysreg_el1(afsr1); |
| ctxt->sys_regs[FAR_EL1] = read_sysreg_el1(far); |
| ctxt->sys_regs[MAIR_EL1] = read_sysreg_el1(mair); |
| ctxt->sys_regs[VBAR_EL1] = read_sysreg_el1(vbar); |
| ctxt->sys_regs[CONTEXTIDR_EL1] = read_sysreg_el1(contextidr); |
| ctxt->sys_regs[AMAIR_EL1] = read_sysreg_el1(amair); |
| ctxt->sys_regs[CNTKCTL_EL1] = read_sysreg_el1(cntkctl); |
| ctxt->sys_regs[PAR_EL1] = read_sysreg(par_el1); |
| |
| ctxt->gp_regs.sp_el1 = read_sysreg(sp_el1); |
| ctxt->gp_regs.elr_el1 = read_sysreg_el1(elr); |
| ctxt->gp_regs.spsr[KVM_SPSR_EL1]= read_sysreg_el1(spsr); |
| } |
| |
| static hyp_alternate_select(__sysreg_call_save_host_state, |
| __sysreg_save_state, __sysreg_do_nothing, |
| ARM64_HAS_VIRT_HOST_EXTN); |
| |
| void __hyp_text __sysreg_save_host_state(struct kvm_cpu_context *ctxt) |
| { |
| __sysreg_call_save_host_state()(ctxt); |
| __sysreg_save_common_state(ctxt); |
| } |
| |
| void __hyp_text __sysreg_save_guest_state(struct kvm_cpu_context *ctxt) |
| { |
| __sysreg_save_state(ctxt); |
| __sysreg_save_common_state(ctxt); |
| } |
| |
| static void __hyp_text __sysreg_restore_common_state(struct kvm_cpu_context *ctxt) |
| { |
| write_sysreg(ctxt->sys_regs[ACTLR_EL1], actlr_el1); |
| write_sysreg(ctxt->sys_regs[TPIDR_EL0], tpidr_el0); |
| write_sysreg(ctxt->sys_regs[TPIDRRO_EL0], tpidrro_el0); |
| write_sysreg(ctxt->sys_regs[TPIDR_EL1], tpidr_el1); |
| write_sysreg(ctxt->sys_regs[MDSCR_EL1], mdscr_el1); |
| write_sysreg(ctxt->gp_regs.regs.sp, sp_el0); |
| write_sysreg_el2(ctxt->gp_regs.regs.pc, elr); |
| write_sysreg_el2(ctxt->gp_regs.regs.pstate, spsr); |
| } |
| |
| static void __hyp_text __sysreg_restore_state(struct kvm_cpu_context *ctxt) |
| { |
| write_sysreg(ctxt->sys_regs[MPIDR_EL1], vmpidr_el2); |
| write_sysreg(ctxt->sys_regs[CSSELR_EL1], csselr_el1); |
| write_sysreg_el1(ctxt->sys_regs[SCTLR_EL1], sctlr); |
| write_sysreg_el1(ctxt->sys_regs[CPACR_EL1], cpacr); |
| write_sysreg_el1(ctxt->sys_regs[TTBR0_EL1], ttbr0); |
| write_sysreg_el1(ctxt->sys_regs[TTBR1_EL1], ttbr1); |
| write_sysreg_el1(ctxt->sys_regs[TCR_EL1], tcr); |
| write_sysreg_el1(ctxt->sys_regs[ESR_EL1], esr); |
| write_sysreg_el1(ctxt->sys_regs[AFSR0_EL1], afsr0); |
| write_sysreg_el1(ctxt->sys_regs[AFSR1_EL1], afsr1); |
| write_sysreg_el1(ctxt->sys_regs[FAR_EL1], far); |
| write_sysreg_el1(ctxt->sys_regs[MAIR_EL1], mair); |
| write_sysreg_el1(ctxt->sys_regs[VBAR_EL1], vbar); |
| write_sysreg_el1(ctxt->sys_regs[CONTEXTIDR_EL1],contextidr); |
| write_sysreg_el1(ctxt->sys_regs[AMAIR_EL1], amair); |
| write_sysreg_el1(ctxt->sys_regs[CNTKCTL_EL1], cntkctl); |
| write_sysreg(ctxt->sys_regs[PAR_EL1], par_el1); |
| |
| write_sysreg(ctxt->gp_regs.sp_el1, sp_el1); |
| write_sysreg_el1(ctxt->gp_regs.elr_el1, elr); |
| write_sysreg_el1(ctxt->gp_regs.spsr[KVM_SPSR_EL1],spsr); |
| } |
| |
| static hyp_alternate_select(__sysreg_call_restore_host_state, |
| __sysreg_restore_state, __sysreg_do_nothing, |
| ARM64_HAS_VIRT_HOST_EXTN); |
| |
| void __hyp_text __sysreg_restore_host_state(struct kvm_cpu_context *ctxt) |
| { |
| __sysreg_call_restore_host_state()(ctxt); |
| __sysreg_restore_common_state(ctxt); |
| } |
| |
| void __hyp_text __sysreg_restore_guest_state(struct kvm_cpu_context *ctxt) |
| { |
| __sysreg_restore_state(ctxt); |
| __sysreg_restore_common_state(ctxt); |
| } |
| |
| void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu) |
| { |
| u64 *spsr, *sysreg; |
| |
| if (read_sysreg(hcr_el2) & HCR_RW) |
| return; |
| |
| spsr = vcpu->arch.ctxt.gp_regs.spsr; |
| sysreg = vcpu->arch.ctxt.sys_regs; |
| |
| spsr[KVM_SPSR_ABT] = read_sysreg(spsr_abt); |
| spsr[KVM_SPSR_UND] = read_sysreg(spsr_und); |
| spsr[KVM_SPSR_IRQ] = read_sysreg(spsr_irq); |
| spsr[KVM_SPSR_FIQ] = read_sysreg(spsr_fiq); |
| |
| sysreg[DACR32_EL2] = read_sysreg(dacr32_el2); |
| sysreg[IFSR32_EL2] = read_sysreg(ifsr32_el2); |
| |
| if (__fpsimd_enabled()) |
| sysreg[FPEXC32_EL2] = read_sysreg(fpexc32_el2); |
| |
| if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY) |
| sysreg[DBGVCR32_EL2] = read_sysreg(dbgvcr32_el2); |
| } |
| |
| void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu) |
| { |
| u64 *spsr, *sysreg; |
| |
| if (read_sysreg(hcr_el2) & HCR_RW) |
| return; |
| |
| spsr = vcpu->arch.ctxt.gp_regs.spsr; |
| sysreg = vcpu->arch.ctxt.sys_regs; |
| |
| write_sysreg(spsr[KVM_SPSR_ABT], spsr_abt); |
| write_sysreg(spsr[KVM_SPSR_UND], spsr_und); |
| write_sysreg(spsr[KVM_SPSR_IRQ], spsr_irq); |
| write_sysreg(spsr[KVM_SPSR_FIQ], spsr_fiq); |
| |
| write_sysreg(sysreg[DACR32_EL2], dacr32_el2); |
| write_sysreg(sysreg[IFSR32_EL2], ifsr32_el2); |
| |
| if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY) |
| write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2); |
| } |
