/* * 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 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com> * Copyright 2011 David Gibson, IBM Corporation <dwg@au1.ibm.com> */ #include <linux/types.h> #include <linux/string.h> #include <linux/kvm.h> #include <linux/kvm_host.h> #include <linux/highmem.h> #include <linux/gfp.h> #include <linux/slab.h> #include <linux/hugetlb.h> #include <linux/list.h> #include <asm/tlbflush.h> #include <asm/kvm_ppc.h> #include <asm/kvm_book3s.h> #include <asm/mmu-hash64.h> #include <asm/hvcall.h> #include <asm/synch.h> #include <asm/ppc-opcode.h> #include <asm/kvm_host.h> #include <asm/udbg.h> #define TCES_PER_PAGE (PAGE_SIZE / sizeof(u64)) /* WARNING: This will be called in real-mode on HV KVM and virtual * mode on PR KVM */ long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn, unsigned long ioba, unsigned long tce) { struct kvm *kvm = vcpu->kvm; struct kvmppc_spapr_tce_table *stt; /* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */ /* liobn, ioba, tce); */ list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) { if (stt->liobn == liobn) { unsigned long idx = ioba >> SPAPR_TCE_SHIFT; struct page *page; u64 *tbl; /* udbg_printf("H_PUT_TCE: liobn 0x%lx => stt=%p window_size=0x%x\n", */ /* liobn, stt, stt->window_size); */ if (ioba >= stt->window_size) return H_PARAMETER; page = stt->pages[idx / TCES_PER_PAGE]; tbl = (u64 *)page_address(page); /* FIXME: Need to validate the TCE itself */ /* udbg_printf("tce @ %p\n", &tbl[idx % TCES_PER_PAGE]); */ tbl[idx % TCES_PER_PAGE] = tce; return H_SUCCESS; } } /* Didn't find the liobn, punt it to userspace */ return H_TOO_HARD; }