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f31e65e117
There is nothing in the code for emulating TCE tables in the kernel that prevents it from working on "PR" KVM... other than ifdef's and location of the code. This and moves the bulk of the code there to a new file called book3s_64_vio.c. This speeds things up a bit on my G5. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [agraf: fix for hv kvm, 32bit, whitespace] Signed-off-by: Alexander Graf <agraf@suse.de>
77 lines
2.3 KiB
C
77 lines
2.3 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright 2010 Paul Mackerras, IBM Corp. <paulus@au1.ibm.com>
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* Copyright 2011 David Gibson, IBM Corporation <dwg@au1.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/kvm.h>
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#include <linux/kvm_host.h>
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#include <linux/highmem.h>
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#include <linux/gfp.h>
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#include <linux/slab.h>
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#include <linux/hugetlb.h>
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#include <linux/list.h>
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#include <asm/tlbflush.h>
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#include <asm/kvm_ppc.h>
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#include <asm/kvm_book3s.h>
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#include <asm/mmu-hash64.h>
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#include <asm/hvcall.h>
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#include <asm/synch.h>
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#include <asm/ppc-opcode.h>
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#include <asm/kvm_host.h>
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#include <asm/udbg.h>
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#define TCES_PER_PAGE (PAGE_SIZE / sizeof(u64))
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/* WARNING: This will be called in real-mode on HV KVM and virtual
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* mode on PR KVM
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*/
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long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
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unsigned long ioba, unsigned long tce)
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{
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struct kvm *kvm = vcpu->kvm;
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struct kvmppc_spapr_tce_table *stt;
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/* udbg_printf("H_PUT_TCE(): liobn=0x%lx ioba=0x%lx, tce=0x%lx\n", */
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/* liobn, ioba, tce); */
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list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
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if (stt->liobn == liobn) {
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unsigned long idx = ioba >> SPAPR_TCE_SHIFT;
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struct page *page;
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u64 *tbl;
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/* udbg_printf("H_PUT_TCE: liobn 0x%lx => stt=%p window_size=0x%x\n", */
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/* liobn, stt, stt->window_size); */
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if (ioba >= stt->window_size)
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return H_PARAMETER;
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page = stt->pages[idx / TCES_PER_PAGE];
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tbl = (u64 *)page_address(page);
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/* FIXME: Need to validate the TCE itself */
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/* udbg_printf("tce @ %p\n", &tbl[idx % TCES_PER_PAGE]); */
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tbl[idx % TCES_PER_PAGE] = tce;
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return H_SUCCESS;
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}
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}
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/* Didn't find the liobn, punt it to userspace */
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return H_TOO_HARD;
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}
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