1 /* SPDX-License-Identifier: GPL-2.0-only */
4 * Copyright 2011 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
6 * Derived from book3s_interrupts.S, which is:
7 * Copyright SUSE Linux Products GmbH 2009
9 * Authors: Alexander Graf <agraf@suse.de>
12 #include <asm/ppc_asm.h>
13 #include <asm/kvm_asm.h>
16 #include <asm/asm-offsets.h>
17 #include <asm/exception-64s.h>
18 #include <asm/ppc-opcode.h>
19 #include <asm/asm-compat.h>
20 #include <asm/feature-fixups.h>
22 /*****************************************************************************
24 * Guest entry / exit code that is in kernel module memory (vmalloc) *
26 ****************************************************************************/
31 _GLOBAL(__kvmppc_vcore_entry)
33 /* Write correct stack frame */
35 std r0,PPC_LR_STKOFF(r1)
37 /* Save host state to the stack */
38 stdu r1, -SWITCH_FRAME_SIZE(r1)
40 /* Save non-volatile registers (r14 - r31) and CR */
47 std r3, HSTATE_DSCR(r13)
52 std r3, HSTATE_DABR(r13)
53 END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
55 /* Save host PMU registers */
56 bl kvmhv_save_host_pmu
59 * Put whatever is in the decrementer into the
60 * hypervisor decrementer.
63 ld r5, HSTATE_KVM_VCORE(r13)
65 ld r9, KVM_HOST_LPCR(r6)
66 andis. r9, r9, LPCR_LD@h
67 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
71 /* On POWER9, don't sign-extend if host LPCR[LD] bit is set */
73 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
75 32: mtspr SPRN_HDEC,r8
77 std r8,HSTATE_DECEXP(r13)
79 /* Jump to partition switch code */
80 bl kvmppc_hv_entry_trampoline
84 * We return here in virtual mode after the guest exits
85 * with something that we can't handle in real mode.
86 * Interrupts are still hard-disabled.
90 * Register usage at this point:
94 * R3 = trap number on this thread
95 * R12 = exit handler id
99 /* Restore non-volatile host registers (r14 - r31) and CR */
104 addi r1, r1, SWITCH_FRAME_SIZE
105 ld r0, PPC_LR_STKOFF(r1)
109 _GLOBAL(kvmhv_save_host_pmu)
111 /* Work around P8 PMAE bug */
115 mtspr SPRN_MMCR2, r3 /* freeze all counters using MMCR2 */
117 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
119 sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
120 mfspr r7, SPRN_MMCR0 /* save MMCR0 */
121 mtspr SPRN_MMCR0, r3 /* freeze all counters, disable interrupts */
123 /* Clear MMCRA in order to disable SDAR updates */
127 lbz r5, PACA_PMCINUSE(r13) /* is the host using the PMU? */
129 beq 31f /* skip if not */
133 std r7, HSTATE_MMCR0(r13)
134 std r5, HSTATE_MMCR1(r13)
135 std r6, HSTATE_MMCRA(r13)
136 std r9, HSTATE_SIAR(r13)
137 std r10, HSTATE_SDAR(r13)
140 std r8, HSTATE_MMCR2(r13)
141 std r9, HSTATE_SIER(r13)
142 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
149 stw r3, HSTATE_PMC1(r13)
150 stw r5, HSTATE_PMC2(r13)
151 stw r6, HSTATE_PMC3(r13)
152 stw r7, HSTATE_PMC4(r13)
153 stw r8, HSTATE_PMC5(r13)
154 stw r9, HSTATE_PMC6(r13)