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54738c09 DG |
1 | /* |
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. | |
5 | * | |
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. | |
10 | * | |
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. | |
14 | * | |
15 | * Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> | |
16 | * Copyright 2011 David Gibson, IBM Corporation <dwg@au1.ibm.com> | |
17 | */ | |
18 | ||
19 | #include <linux/types.h> | |
20 | #include <linux/string.h> | |
21 | #include <linux/kvm.h> | |
22 | #include <linux/kvm_host.h> | |
23 | #include <linux/highmem.h> | |
24 | #include <linux/gfp.h> | |
25 | #include <linux/slab.h> | |
26 | #include <linux/hugetlb.h> | |
27 | #include <linux/list.h> | |
28 | ||
29 | #include <asm/tlbflush.h> | |
30 | #include <asm/kvm_ppc.h> | |
31 | #include <asm/kvm_book3s.h> | |
32 | #include <asm/mmu-hash64.h> | |
33 | #include <asm/hvcall.h> | |
34 | #include <asm/synch.h> | |
35 | #include <asm/ppc-opcode.h> | |
36 | #include <asm/kvm_host.h> | |
37 | #include <asm/udbg.h> | |
38 | ||
39 | #define TCES_PER_PAGE (PAGE_SIZE / sizeof(u64)) | |
40 | ||
f31e65e1 BH |
41 | /* WARNING: This will be called in real-mode on HV KVM and virtual |
42 | * mode on PR KVM | |
43 | */ | |
54738c09 DG |
44 | long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, |
45 | unsigned long ioba, unsigned long tce) | |
46 | { | |
47 | struct kvm *kvm = vcpu->kvm; | |
48 | struct kvmppc_spapr_tce_table *stt; | |
49 | ||
50 | /* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */ | |
51 | /* liobn, ioba, tce); */ | |
52 | ||
53 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { | |
54 | if (stt->liobn == liobn) { | |
55 | unsigned long idx = ioba >> SPAPR_TCE_SHIFT; | |
56 | struct page *page; | |
57 | u64 *tbl; | |
58 | ||
59 | /* udbg_printf("H_PUT_TCE: liobn 0x%lx => stt=%p window_size=0x%x\n", */ | |
60 | /* liobn, stt, stt->window_size); */ | |
61 | if (ioba >= stt->window_size) | |
62 | return H_PARAMETER; | |
63 | ||
64 | page = stt->pages[idx / TCES_PER_PAGE]; | |
65 | tbl = (u64 *)page_address(page); | |
66 | ||
67 | /* FIXME: Need to validate the TCE itself */ | |
68 | /* udbg_printf("tce @ %p\n", &tbl[idx % TCES_PER_PAGE]); */ | |
69 | tbl[idx % TCES_PER_PAGE] = tce; | |
70 | return H_SUCCESS; | |
71 | } | |
72 | } | |
73 | ||
74 | /* Didn't find the liobn, punt it to userspace */ | |
75 | return H_TOO_HARD; | |
76 | } | |
066212e0 | 77 | EXPORT_SYMBOL_GPL(kvmppc_h_put_tce); |
69e9fbb2 LD |
78 | |
79 | long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn, | |
80 | unsigned long ioba) | |
81 | { | |
82 | struct kvm *kvm = vcpu->kvm; | |
83 | struct kvmppc_spapr_tce_table *stt; | |
84 | ||
85 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { | |
86 | if (stt->liobn == liobn) { | |
87 | unsigned long idx = ioba >> SPAPR_TCE_SHIFT; | |
88 | struct page *page; | |
89 | u64 *tbl; | |
90 | ||
91 | if (ioba >= stt->window_size) | |
92 | return H_PARAMETER; | |
93 | ||
94 | page = stt->pages[idx / TCES_PER_PAGE]; | |
95 | tbl = (u64 *)page_address(page); | |
96 | ||
97 | vcpu->arch.gpr[4] = tbl[idx % TCES_PER_PAGE]; | |
98 | return H_SUCCESS; | |
99 | } | |
100 | } | |
101 | ||
102 | /* Didn't find the liobn, punt it to userspace */ | |
103 | return H_TOO_HARD; | |
104 | } | |
105 | EXPORT_SYMBOL_GPL(kvmppc_h_get_tce); |