2 * This program is free software; you can redistribute it and/or modify
3 * it under the terms of the GNU General Public License, version 2, as
4 * published by the Free Software Foundation.
6 * This program is distributed in the hope that it will be useful,
7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
9 * GNU General Public License for more details.
11 * You should have received a copy of the GNU General Public License
12 * along with this program; if not, write to the Free Software
13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17 * Derived from book3s_interrupts.S, which is:
18 * Copyright SUSE Linux Products GmbH 2009
23 #include <asm/ppc_asm.h>
24 #include <asm/kvm_asm.h>
27 #include <asm/asm-offsets.h>
28 #include <asm/exception-64s.h>
29 #include <asm/ppc-opcode.h>
30 #include <asm/asm-compat.h>
31 #include <asm/feature-fixups.h>
33 /*****************************************************************************
35 * Guest entry / exit code that is in kernel module memory (vmalloc) *
37 ****************************************************************************/
42 _GLOBAL(__kvmppc_vcore_entry)
44 /* Write correct stack frame */
46 std r0,PPC_LR_STKOFF(r1)
48 /* Save host state to the stack */
49 stdu r1, -SWITCH_FRAME_SIZE(r1)
51 /* Save non-volatile registers (r14 - r31) and CR */
58 std r3, HSTATE_DSCR(r13)
63 std r3, HSTATE_DABR(r13)
64 END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
66 /* Save host PMU registers */
67 bl kvmhv_save_host_pmu
70 * Put whatever is in the decrementer into the
71 * hypervisor decrementer.
74 ld r5, HSTATE_KVM_VCORE(r13)
76 ld r9, KVM_HOST_LPCR(r6)
77 andis. r9, r9, LPCR_LD@h
78 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
82 /* On POWER9, don't sign-extend if host LPCR[LD] bit is set */
84 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
86 32: mtspr SPRN_HDEC,r8
88 std r8,HSTATE_DECEXP(r13)
90 /* Jump to partition switch code */
91 bl kvmppc_hv_entry_trampoline
95 * We return here in virtual mode after the guest exits
96 * with something that we can't handle in real mode.
97 * Interrupts are still hard-disabled.
101 * Register usage at this point:
105 * R3 = trap number on this thread
106 * R12 = exit handler id
110 /* Restore non-volatile host registers (r14 - r31) and CR */
115 addi r1, r1, SWITCH_FRAME_SIZE
116 ld r0, PPC_LR_STKOFF(r1)
120 _GLOBAL(kvmhv_save_host_pmu)
122 /* Work around P8 PMAE bug */
126 mtspr SPRN_MMCR2, r3 /* freeze all counters using MMCR2 */
128 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
130 sldi r3, r3, 31 /* MMCR0_FC (freeze counters) bit */
131 mfspr r7, SPRN_MMCR0 /* save MMCR0 */
132 mtspr SPRN_MMCR0, r3 /* freeze all counters, disable interrupts */
134 /* Clear MMCRA in order to disable SDAR updates */
138 lbz r5, PACA_PMCINUSE(r13) /* is the host using the PMU? */
140 beq 31f /* skip if not */
144 std r7, HSTATE_MMCR0(r13)
145 std r5, HSTATE_MMCR1(r13)
146 std r6, HSTATE_MMCRA(r13)
147 std r9, HSTATE_SIAR(r13)
148 std r10, HSTATE_SDAR(r13)
151 std r8, HSTATE_MMCR2(r13)
152 std r9, HSTATE_SIER(r13)
153 END_FTR_SECTION_IFSET(CPU_FTR_ARCH_207S)
160 stw r3, HSTATE_PMC1(r13)
161 stw r5, HSTATE_PMC2(r13)
162 stw r6, HSTATE_PMC3(r13)
163 stw r7, HSTATE_PMC4(r13)
164 stw r8, HSTATE_PMC5(r13)
165 stw r9, HSTATE_PMC6(r13)