2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
15 * Copyright SUSE Linux Products GmbH 2009
17 * Authors: Alexander Graf <agraf@suse.de>
20 #include <asm/ppc_asm.h>
21 #include <asm/kvm_asm.h>
24 #include <asm/asm-offsets.h>
25 #include <asm/exception-64s.h>
27 /*****************************************************************************
29 * Real Mode handlers that need to be in low physical memory *
31 ****************************************************************************/
34 .macro INTERRUPT_TRAMPOLINE intno
36 .global kvmppc_trampoline_\intno
37 kvmppc_trampoline_\intno:
39 mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */
42 * First thing to do is to find out if we're coming
43 * from a KVM guest or a Linux process.
45 * To distinguish, we check a magic byte in the PACA
47 mfspr r13, SPRN_SPRG_PACA /* r13 = PACA */
48 std r12, PACA_KVM_SCRATCH0(r13)
50 stw r12, PACA_KVM_SCRATCH1(r13)
51 lbz r12, PACA_KVM_IN_GUEST(r13)
53 bne ..kvmppc_handler_hasmagic_\intno
54 /* No KVM guest? Then jump back to the Linux handler! */
55 lwz r12, PACA_KVM_SCRATCH1(r13)
57 ld r12, PACA_KVM_SCRATCH0(r13)
58 mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */
59 b kvmppc_resume_\intno /* Get back original handler */
61 /* Now we know we're handling a KVM guest */
62 ..kvmppc_handler_hasmagic_\intno:
63 /* Let's store which interrupt we're handling */
66 /* Jump into the SLB exit code that goes to the highmem handler */
67 b kvmppc_handler_trampoline_exit
71 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSTEM_RESET
72 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK
73 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE
74 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT
75 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE
76 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT
77 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL
78 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT
79 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM
80 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL
81 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DECREMENTER
82 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSCALL
83 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE
84 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON
85 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC
86 INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX
89 * This trampoline brings us back to a real mode handler
98 .global kvmppc_handler_lowmem_trampoline
99 kvmppc_handler_lowmem_trampoline:
104 kvmppc_handler_lowmem_trampoline_end:
106 .global kvmppc_trampoline_lowmem
107 kvmppc_trampoline_lowmem:
108 .long kvmppc_handler_lowmem_trampoline - _stext
110 .global kvmppc_trampoline_enter
111 kvmppc_trampoline_enter:
112 .long kvmppc_handler_trampoline_enter - _stext
114 #include "book3s_64_slb.S"