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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 | /* * 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: * none */ _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) and CR */ SAVE_NVGPRS(r1) mfcr r3 std r3, _CCR(r1) /* Save host DSCR */ mfspr r3, SPRN_DSCR std r3, HSTATE_DSCR(r13) BEGIN_FTR_SECTION /* Save host DABR */ mfspr r3, SPRN_DABR std r3, HSTATE_DABR(r13) END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S) /* Save host PMU registers */ BEGIN_FTR_SECTION /* Work around P8 PMAE bug */ li r3, -1 clrrdi r3, r3, 10 mfspr r8, SPRN_MMCR2 mtspr SPRN_MMCR2, r3 /* freeze all counters using MMCR2 */ isync END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) 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 */ mfspr r6, SPRN_MMCRA /* Clear MMCRA in order to disable SDAR updates */ li r5, 0 mtspr SPRN_MMCRA, r5 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 r9, SPRN_SIAR mfspr r10, SPRN_SDAR std r7, HSTATE_MMCR0(r13) std r5, HSTATE_MMCR1(r13) std r6, HSTATE_MMCRA(r13) std r9, HSTATE_SIAR(r13) std r10, HSTATE_SDAR(r13) BEGIN_FTR_SECTION mfspr r9, SPRN_SIER std r8, HSTATE_MMCR2(r13) std r9, HSTATE_SIER(r13) END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S) mfspr r3, SPRN_PMC1 mfspr r5, SPRN_PMC2 mfspr r6, SPRN_PMC3 mfspr r7, SPRN_PMC4 mfspr r8, SPRN_PMC5 mfspr r9, SPRN_PMC6 stw r3, HSTATE_PMC1(r13) stw r5, HSTATE_PMC2(r13) stw r6, HSTATE_PMC3(r13) stw r7, HSTATE_PMC4(r13) stw r8, HSTATE_PMC5(r13) stw r9, HSTATE_PMC6(r13) 31: /* * Put whatever is in the decrementer into the * hypervisor decrementer. */ BEGIN_FTR_SECTION ld r5, HSTATE_KVM_VCORE(r13) ld r6, VCORE_KVM(r5) ld r9, KVM_HOST_LPCR(r6) andis. r9, r9, LPCR_LD@h END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) mfspr r8,SPRN_DEC mftb r7 BEGIN_FTR_SECTION /* On POWER9, don't sign-extend if host LPCR[LD] bit is set */ bne 32f END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300) extsw r8,r8 32: mtspr SPRN_HDEC,r8 add r8,r8,r7 std r8,HSTATE_DECEXP(r13) /* 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. */ /* * Register usage at this point: * * R1 = host R1 * R2 = host R2 * R3 = trap number on this thread * R12 = exit handler id * R13 = PACA */ /* Restore non-volatile host registers (r14 - r31) and CR */ REST_NVGPRS(r1) ld r4, _CCR(r1) mtcr r4 addi r1, r1, SWITCH_FRAME_SIZE ld r0, PPC_LR_STKOFF(r1) mtlr r0 blr |