diff options
Diffstat (limited to 'arch/powerpc/kvm/book3s_64_rmhandlers.S')
| -rw-r--r-- | arch/powerpc/kvm/book3s_64_rmhandlers.S | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/arch/powerpc/kvm/book3s_64_rmhandlers.S b/arch/powerpc/kvm/book3s_64_rmhandlers.S deleted file mode 100644 index c83c60ad96c5..000000000000 --- a/arch/powerpc/kvm/book3s_64_rmhandlers.S +++ /dev/null @@ -1,204 +0,0 @@ -/* - * 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_KVM_SCRATCH0(r13) - mfcr r12 - stw r12, PACA_KVM_SCRATCH1(r13) - lbz r12, PACA_KVM_IN_GUEST(r13) - cmpwi r12, KVM_GUEST_MODE_NONE - bne ..kvmppc_handler_hasmagic_\intno - /* No KVM guest? Then jump back to the Linux handler! */ - lwz r12, PACA_KVM_SCRATCH1(r13) - mtcr r12 - ld r12, PACA_KVM_SCRATCH0(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: - - /* Should we just skip the faulting instruction? */ - cmpwi r12, KVM_GUEST_MODE_SKIP - beq kvmppc_handler_skip_ins - - /* 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 - -/* - * Bring us back to the faulting code, but skip the - * faulting instruction. - * - * This is a generic exit path from the interrupt - * trampolines above. - * - * Input Registers: - * - * R12 = free - * R13 = PACA - * PACA.KVM.SCRATCH0 = guest R12 - * PACA.KVM.SCRATCH1 = guest CR - * SPRG_SCRATCH0 = guest R13 - * - */ -kvmppc_handler_skip_ins: - - /* Patch the IP to the next instruction */ - mfsrr0 r12 - addi r12, r12, 4 - mtsrr0 r12 - - /* Clean up all state */ - lwz r12, PACA_KVM_SCRATCH1(r13) - mtcr r12 - ld r12, PACA_KVM_SCRATCH0(r13) - mfspr r13, SPRN_SPRG_SCRATCH0 - - /* And get back into the code */ - RFI - -/* - * This trampoline brings us back to a real mode handler - * - * Input Registers: - * - * R5 = SRR0 - * R6 = SRR1 - * LR = real-mode IP - * - */ -.global kvmppc_handler_lowmem_trampoline -kvmppc_handler_lowmem_trampoline: - - mtsrr0 r5 - mtsrr1 r6 - blr -kvmppc_handler_lowmem_trampoline_end: - -/* - * Call a function in real mode - * - * Input Registers: - * - * R3 = function - * R4 = MSR - * R5 = CTR - * - */ -_GLOBAL(kvmppc_rmcall) - mtmsr r4 /* Disable relocation, so mtsrr - doesn't get interrupted */ - mtctr r5 - mtsrr0 r3 - mtsrr1 r4 - RFI - -/* - * Activate current's external feature (FPU/Altivec/VSX) - */ -#define define_load_up(what) \ - \ -_GLOBAL(kvmppc_load_up_ ## what); \ - subi r1, r1, INT_FRAME_SIZE; \ - mflr r3; \ - std r3, _LINK(r1); \ - mfmsr r4; \ - std r31, GPR3(r1); \ - mr r31, r4; \ - li r5, MSR_DR; \ - oris r5, r5, MSR_EE@h; \ - andc r4, r4, r5; \ - mtmsr r4; \ - \ - bl .load_up_ ## what; \ - \ - mtmsr r31; \ - ld r3, _LINK(r1); \ - ld r31, GPR3(r1); \ - addi r1, r1, INT_FRAME_SIZE; \ - mtlr r3; \ - blr - -define_load_up(fpu) -#ifdef CONFIG_ALTIVEC -define_load_up(altivec) -#endif -#ifdef CONFIG_VSX -define_load_up(vsx) -#endif - -.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" - |