| /* |
| * 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, write to the Free Software |
| * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| * |
| * Copyright SUSE Linux Products GmbH 2009 |
| * |
| * Authors: Alexander Graf <agraf@suse.de> |
| */ |
| |
| #include <asm/ppc_asm.h> |
| #include <asm/kvm_asm.h> |
| #include <asm/reg.h> |
| #include <asm/page.h> |
| #include <asm/asm-offsets.h> |
| #include <asm/exception-64s.h> |
| |
| /***************************************************************************** |
| * * |
| * Real Mode handlers that need to be in low physical memory * |
| * * |
| ****************************************************************************/ |
| |
| |
| .macro INTERRUPT_TRAMPOLINE intno |
| |
| .global kvmppc_trampoline_\intno |
| kvmppc_trampoline_\intno: |
| |
| mtspr SPRN_SPRG_SCRATCH0, r13 /* Save r13 */ |
| |
| /* |
| * First thing to do is to find out if we're coming |
| * from a KVM guest or a Linux process. |
| * |
| * To distinguish, we check a magic byte in the PACA |
| */ |
| mfspr r13, SPRN_SPRG_PACA /* r13 = PACA */ |
| std r12, (PACA_EXMC + EX_R12)(r13) |
| mfcr r12 |
| stw r12, (PACA_EXMC + EX_CCR)(r13) |
| lbz r12, PACA_KVM_IN_GUEST(r13) |
| cmpwi r12, 0 |
| bne ..kvmppc_handler_hasmagic_\intno |
| /* No KVM guest? Then jump back to the Linux handler! */ |
| lwz r12, (PACA_EXMC + EX_CCR)(r13) |
| mtcr r12 |
| ld r12, (PACA_EXMC + EX_R12)(r13) |
| mfspr r13, SPRN_SPRG_SCRATCH0 /* r13 = original r13 */ |
| b kvmppc_resume_\intno /* Get back original handler */ |
| |
| /* Now we know we're handling a KVM guest */ |
| ..kvmppc_handler_hasmagic_\intno: |
| /* Unset guest state */ |
| li r12, 0 |
| stb r12, PACA_KVM_IN_GUEST(r13) |
| |
| std r1, (PACA_EXMC+EX_R9)(r13) |
| std r10, (PACA_EXMC+EX_R10)(r13) |
| std r11, (PACA_EXMC+EX_R11)(r13) |
| std r2, (PACA_EXMC+EX_R13)(r13) |
| |
| mfsrr0 r10 |
| mfsrr1 r11 |
| |
| /* Restore R1/R2 so we can handle faults */ |
| ld r1, PACAR1(r13) |
| ld r2, (PACA_EXMC+EX_SRR0)(r13) |
| |
| /* Let's store which interrupt we're handling */ |
| li r12, \intno |
| |
| /* Jump into the SLB exit code that goes to the highmem handler */ |
| b kvmppc_handler_trampoline_exit |
| |
| .endm |
| |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSTEM_RESET |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_MACHINE_CHECK |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_STORAGE |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DATA_SEGMENT |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_STORAGE |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_INST_SEGMENT |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_EXTERNAL |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALIGNMENT |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PROGRAM |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_FP_UNAVAIL |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_DECREMENTER |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_SYSCALL |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_TRACE |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_PERFMON |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_ALTIVEC |
| INTERRUPT_TRAMPOLINE BOOK3S_INTERRUPT_VSX |
| |
| /* |
| * This trampoline brings us back to a real mode handler |
| * |
| * Input Registers: |
| * |
| * R6 = SRR0 |
| * R7 = SRR1 |
| * LR = real-mode IP |
| * |
| */ |
| .global kvmppc_handler_lowmem_trampoline |
| kvmppc_handler_lowmem_trampoline: |
| |
| mtsrr0 r6 |
| mtsrr1 r7 |
| blr |
| kvmppc_handler_lowmem_trampoline_end: |
| |
| .global kvmppc_trampoline_lowmem |
| kvmppc_trampoline_lowmem: |
| .long kvmppc_handler_lowmem_trampoline - _stext |
| |
| .global kvmppc_trampoline_enter |
| kvmppc_trampoline_enter: |
| .long kvmppc_handler_trampoline_enter - _stext |
| |
| #include "book3s_64_slb.S" |
| |
