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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 | /* * 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 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> * * Derived from book3s_interrupts.S, which is: * 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> #include <asm/ppc-opcode.h> /***************************************************************************** * * * Guest entry / exit code that is in kernel module memory (vmalloc) * * * ****************************************************************************/ /* Registers: * r4: vcpu pointer */ _GLOBAL(__kvmppc_vcore_entry) /* Write correct stack frame */ mflr r0 std r0,PPC_LR_STKOFF(r1) /* Save host state to the stack */ stdu r1, -SWITCH_FRAME_SIZE(r1) /* Save non-volatile registers (r14 - r31) */ SAVE_NVGPRS(r1) /* Save host DSCR */ BEGIN_FTR_SECTION mfspr r3, SPRN_DSCR std r3, HSTATE_DSCR(r13) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_206) /* Save host DABR */ mfspr r3, SPRN_DABR std r3, HSTATE_DABR(r13) /* Hard-disable interrupts */ mfmsr r10 std r10, HSTATE_HOST_MSR(r13) rldicl r10,r10,48,1 rotldi r10,r10,16 mtmsrd r10,1 /* Save host PMU registers and load guest PMU registers */ /* R4 is live here (vcpu pointer) but not r3 or r5 */ li r3, 1 sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */ mfspr r7, SPRN_MMCR0 /* save MMCR0 */ mtspr SPRN_MMCR0, r3 /* freeze all counters, disable interrupts */ isync ld r3, PACALPPACAPTR(r13) /* is the host using the PMU? */ lbz r5, LPPACA_PMCINUSE(r3) cmpwi r5, 0 beq 31f /* skip if not */ mfspr r5, SPRN_MMCR1 mfspr r6, SPRN_MMCRA std r7, HSTATE_MMCR(r13) std r5, HSTATE_MMCR + 8(r13) std r6, HSTATE_MMCR + 16(r13) mfspr r3, SPRN_PMC1 mfspr r5, SPRN_PMC2 mfspr r6, SPRN_PMC3 mfspr r7, SPRN_PMC4 mfspr r8, SPRN_PMC5 mfspr r9, SPRN_PMC6 BEGIN_FTR_SECTION mfspr r10, SPRN_PMC7 mfspr r11, SPRN_PMC8 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) stw r3, HSTATE_PMC(r13) stw r5, HSTATE_PMC + 4(r13) stw r6, HSTATE_PMC + 8(r13) stw r7, HSTATE_PMC + 12(r13) stw r8, HSTATE_PMC + 16(r13) stw r9, HSTATE_PMC + 20(r13) BEGIN_FTR_SECTION stw r10, HSTATE_PMC + 24(r13) stw r11, HSTATE_PMC + 28(r13) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) 31: /* * Put whatever is in the decrementer into the * hypervisor decrementer. */ mfspr r8,SPRN_DEC mftb r7 mtspr SPRN_HDEC,r8 extsw r8,r8 add r8,r8,r7 std r8,HSTATE_DECEXP(r13) /* * On PPC970, if the guest vcpu has an external interrupt pending, * send ourselves an IPI so as to interrupt the guest once it * enables interrupts. (It must have interrupts disabled, * otherwise we would already have delivered the interrupt.) */ BEGIN_FTR_SECTION ld r0, VCPU_PENDING_EXC(r4) li r7, (1 << BOOK3S_IRQPRIO_EXTERNAL) oris r7, r7, (1 << BOOK3S_IRQPRIO_EXTERNAL_LEVEL)@h and. r0, r0, r7 beq 32f mr r31, r4 lhz r3, PACAPACAINDEX(r13) bl smp_send_reschedule nop mr r4, r31 32: END_FTR_SECTION_IFSET(CPU_FTR_ARCH_201) /* Jump to partition switch code */ bl .kvmppc_hv_entry_trampoline nop /* * We return here in virtual mode after the guest exits * with something that we can't handle in real mode. * Interrupts are enabled again at this point. */ .global kvmppc_handler_highmem kvmppc_handler_highmem: /* * Register usage at this point: * * R1 = host R1 * R2 = host R2 * R12 = exit handler id * R13 = PACA */ /* Restore non-volatile host registers (r14 - r31) */ REST_NVGPRS(r1) addi r1, r1, SWITCH_FRAME_SIZE ld r0, PPC_LR_STKOFF(r1) mtlr r0 blr |