| David Gibson | 54738c0 | 2011-06-29 00:22:41 +0000 | [diff] [blame^] | 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 | |
| 41 | long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, |
| 42 | unsigned long ioba, unsigned long tce) |
| 43 | { |
| 44 | struct kvm *kvm = vcpu->kvm; |
| 45 | struct kvmppc_spapr_tce_table *stt; |
| 46 | |
| 47 | /* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */ |
| 48 | /* liobn, ioba, tce); */ |
| 49 | |
| 50 | list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { |
| 51 | if (stt->liobn == liobn) { |
| 52 | unsigned long idx = ioba >> SPAPR_TCE_SHIFT; |
| 53 | struct page *page; |
| 54 | u64 *tbl; |
| 55 | |
| 56 | /* udbg_printf("H_PUT_TCE: liobn 0x%lx => stt=%p window_size=0x%x\n", */ |
| 57 | /* liobn, stt, stt->window_size); */ |
| 58 | if (ioba >= stt->window_size) |
| 59 | return H_PARAMETER; |
| 60 | |
| 61 | page = stt->pages[idx / TCES_PER_PAGE]; |
| 62 | tbl = (u64 *)page_address(page); |
| 63 | |
| 64 | /* FIXME: Need to validate the TCE itself */ |
| 65 | /* udbg_printf("tce @ %p\n", &tbl[idx % TCES_PER_PAGE]); */ |
| 66 | tbl[idx % TCES_PER_PAGE] = tce; |
| 67 | return H_SUCCESS; |
| 68 | } |
| 69 | } |
| 70 | |
| 71 | /* Didn't find the liobn, punt it to userspace */ |
| 72 | return H_TOO_HARD; |
| 73 | } |