2 * Copyright (C) 2015 - ARM Ltd
3 * Author: Marc Zyngier <marc.zyngier@arm.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 #include <linux/linkage.h>
20 #include <asm/alternative.h>
21 #include <asm/assembler.h>
22 #include <asm/cpufeature.h>
23 #include <asm/kvm_arm.h>
24 #include <asm/kvm_asm.h>
25 #include <asm/kvm_mmu.h>
28 .pushsection .hyp.text, "ax"
32 * Shuffle the parameters before calling the function
33 * pointed to in x0. Assumes parameters in x[1,2,3].
47 * We used to rely on having an exception return to get
48 * an implicit isb. In the E2H case, we don't have it anymore.
49 * rather than changing all the leaf functions, just do it here
50 * before returning to the rest of the kernel.
54 ENDPROC(__vhe_hyp_call)
57 * Compute the idmap address of __kvm_hyp_reset based on the idmap
58 * start passed as a parameter, and jump there.
60 * x0: HYP phys_idmap_start
62 ENTRY(__kvm_hyp_teardown)
64 adr_l x3, __kvm_hyp_reset
66 /* insert __kvm_hyp_reset()s offset into phys_idmap_start */
67 bfi x4, x3, #0, #PAGE_SHIFT
69 ENDPROC(__kvm_hyp_teardown)
71 el1_sync: // Guest trapped into EL2
72 stp x0, x1, [sp, #-16]!
74 alternative_if_not ARM64_HAS_VIRT_HOST_EXTN
79 lsr x0, x1, #ESR_ELx_EC_SHIFT
81 cmp x0, #ESR_ELx_EC_HVC64
84 mrs x1, vttbr_el2 // If vttbr is valid, the 64bit guest
85 cbnz x1, el1_trap // called HVC
87 /* Here, we're pretty sure the host called HVC. */
90 cmp x0, #HVC_GET_VECTORS
97 * Perform the EL2 call
109 /* Guest accessed VFP/SIMD registers, save host, restore Guest */
110 cmp x0, #ESR_ELx_EC_FP_ASIMD
111 b.eq __fpsimd_guest_restore
114 mov x0, #ARM_EXCEPTION_TRAP
118 stp x0, x1, [sp, #-16]!
120 mov x0, #ARM_EXCEPTION_IRQ
123 ENTRY(__hyp_do_panic)
124 mov lr, #(PSR_F_BIT | PSR_I_BIT | PSR_A_BIT | PSR_D_BIT |\
130 ENDPROC(__hyp_do_panic)
132 .macro invalid_vector label, target = __hyp_panic
139 /* None of these should ever happen */
140 invalid_vector el2t_sync_invalid
141 invalid_vector el2t_irq_invalid
142 invalid_vector el2t_fiq_invalid
143 invalid_vector el2t_error_invalid
144 invalid_vector el2h_sync_invalid
145 invalid_vector el2h_irq_invalid
146 invalid_vector el2h_fiq_invalid
147 invalid_vector el2h_error_invalid
148 invalid_vector el1_sync_invalid
149 invalid_vector el1_irq_invalid
150 invalid_vector el1_fiq_invalid
151 invalid_vector el1_error_invalid
157 ENTRY(__kvm_hyp_vector)
158 ventry el2t_sync_invalid // Synchronous EL2t
159 ventry el2t_irq_invalid // IRQ EL2t
160 ventry el2t_fiq_invalid // FIQ EL2t
161 ventry el2t_error_invalid // Error EL2t
163 ventry el2h_sync_invalid // Synchronous EL2h
164 ventry el2h_irq_invalid // IRQ EL2h
165 ventry el2h_fiq_invalid // FIQ EL2h
166 ventry el2h_error_invalid // Error EL2h
168 ventry el1_sync // Synchronous 64-bit EL1
169 ventry el1_irq // IRQ 64-bit EL1
170 ventry el1_fiq_invalid // FIQ 64-bit EL1
171 ventry el1_error_invalid // Error 64-bit EL1
173 ventry el1_sync // Synchronous 32-bit EL1
174 ventry el1_irq // IRQ 32-bit EL1
175 ventry el1_fiq_invalid // FIQ 32-bit EL1
176 ventry el1_error_invalid // Error 32-bit EL1
177 ENDPROC(__kvm_hyp_vector)