KVM: PPC: E500: Split host and guest MMU parts

This patch splits the file e500_tlb.c into e500_mmu.c (guest TLB handling)
and e500_mmu_host.c (host TLB handling).

The main benefit of this split is readability and maintainability. It's
just a lot harder to write dirty code :).

Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 811 insertions, 0 deletions

diff --git a/arch/powerpc/kvm/e500_mmu.c b/arch/powerpc/kvm/e500_mmu.c
new file mode 100644
index 000000000000..c3d1721aa1b8
--- /dev/null
+++ b/arch/powerpc/kvm/e500_mmu.c
@@ -0,0 +1,811 @@
+/*
+ * Copyright (C) 2008-2013 Freescale Semiconductor, Inc. All rights reserved.
+ *
+ * Author: Yu Liu, yu.liu@freescale.com
+ *         Scott Wood, scottwood@freescale.com
+ *         Ashish Kalra, ashish.kalra@freescale.com
+ *         Varun Sethi, varun.sethi@freescale.com
+ *         Alexander Graf, agraf@suse.de
+ *
+ * Description:
+ * This file is based on arch/powerpc/kvm/44x_tlb.c,
+ * by Hollis Blanchard <hollisb@us.ibm.com>.
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/kvm.h>
+#include <linux/kvm_host.h>
+#include <linux/highmem.h>
+#include <linux/log2.h>
+#include <linux/uaccess.h>
+#include <linux/sched.h>
+#include <linux/rwsem.h>
+#include <linux/vmalloc.h>
+#include <linux/hugetlb.h>
+#include <asm/kvm_ppc.h>
+
+#include "e500.h"
+#include "trace.h"
+#include "timing.h"
+#include "e500_mmu_host.h"
+
+static inline unsigned int gtlb0_get_next_victim(
+		struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+	unsigned int victim;
+
+	victim = vcpu_e500->gtlb_nv[0]++;
+	if (unlikely(vcpu_e500->gtlb_nv[0] >= vcpu_e500->gtlb_params[0].ways))
+		vcpu_e500->gtlb_nv[0] = 0;
+
+	return victim;
+}
+
+static int tlb0_set_base(gva_t addr, int sets, int ways)
+{
+	int set_base;
+
+	set_base = (addr >> PAGE_SHIFT) & (sets - 1);
+	set_base *= ways;
+
+	return set_base;
+}
+
+static int gtlb0_set_base(struct kvmppc_vcpu_e500 *vcpu_e500, gva_t addr)
+{
+	return tlb0_set_base(addr, vcpu_e500->gtlb_params[0].sets,
+			     vcpu_e500->gtlb_params[0].ways);
+}
+
+static unsigned int get_tlb_esel(struct kvm_vcpu *vcpu, int tlbsel)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	int esel = get_tlb_esel_bit(vcpu);
+
+	if (tlbsel == 0) {
+		esel &= vcpu_e500->gtlb_params[0].ways - 1;
+		esel += gtlb0_set_base(vcpu_e500, vcpu->arch.shared->mas2);
+	} else {
+		esel &= vcpu_e500->gtlb_params[tlbsel].entries - 1;
+	}
+
+	return esel;
+}
+
+/* Search the guest TLB for a matching entry. */
+static int kvmppc_e500_tlb_index(struct kvmppc_vcpu_e500 *vcpu_e500,
+		gva_t eaddr, int tlbsel, unsigned int pid, int as)
+{
+	int size = vcpu_e500->gtlb_params[tlbsel].entries;
+	unsigned int set_base, offset;
+	int i;
+
+	if (tlbsel == 0) {
+		set_base = gtlb0_set_base(vcpu_e500, eaddr);
+		size = vcpu_e500->gtlb_params[0].ways;
+	} else {
+		if (eaddr < vcpu_e500->tlb1_min_eaddr ||
+				eaddr > vcpu_e500->tlb1_max_eaddr)
+			return -1;
+		set_base = 0;
+	}
+
+	offset = vcpu_e500->gtlb_offset[tlbsel];
+
+	for (i = 0; i < size; i++) {
+		struct kvm_book3e_206_tlb_entry *tlbe =
+			&vcpu_e500->gtlb_arch[offset + set_base + i];
+		unsigned int tid;
+
+		if (eaddr < get_tlb_eaddr(tlbe))
+			continue;
+
+		if (eaddr > get_tlb_end(tlbe))
+			continue;
+
+		tid = get_tlb_tid(tlbe);
+		if (tid && (tid != pid))
+			continue;
+
+		if (!get_tlb_v(tlbe))
+			continue;
+
+		if (get_tlb_ts(tlbe) != as && as != -1)
+			continue;
+
+		return set_base + i;
+	}
+
+	return -1;
+}
+
+static inline void kvmppc_e500_deliver_tlb_miss(struct kvm_vcpu *vcpu,
+		unsigned int eaddr, int as)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	unsigned int victim, tsized;
+	int tlbsel;
+
+	/* since we only have two TLBs, only lower bit is used. */
+	tlbsel = (vcpu->arch.shared->mas4 >> 28) & 0x1;
+	victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
+	tsized = (vcpu->arch.shared->mas4 >> 7) & 0x1f;
+
+	vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(victim)
+		| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
+	vcpu->arch.shared->mas1 = MAS1_VALID | (as ? MAS1_TS : 0)
+		| MAS1_TID(get_tlbmiss_tid(vcpu))
+		| MAS1_TSIZE(tsized);
+	vcpu->arch.shared->mas2 = (eaddr & MAS2_EPN)
+		| (vcpu->arch.shared->mas4 & MAS2_ATTRIB_MASK);
+	vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3;
+	vcpu->arch.shared->mas6 = (vcpu->arch.shared->mas6 & MAS6_SPID1)
+		| (get_cur_pid(vcpu) << 16)
+		| (as ? MAS6_SAS : 0);
+}
+
+static void kvmppc_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+	int size = vcpu_e500->gtlb_params[1].entries;
+	unsigned int offset;
+	gva_t eaddr;
+	int i;
+
+	vcpu_e500->tlb1_min_eaddr = ~0UL;
+	vcpu_e500->tlb1_max_eaddr = 0;
+	offset = vcpu_e500->gtlb_offset[1];
+
+	for (i = 0; i < size; i++) {
+		struct kvm_book3e_206_tlb_entry *tlbe =
+			&vcpu_e500->gtlb_arch[offset + i];
+
+		if (!get_tlb_v(tlbe))
+			continue;
+
+		eaddr = get_tlb_eaddr(tlbe);
+		vcpu_e500->tlb1_min_eaddr =
+				min(vcpu_e500->tlb1_min_eaddr, eaddr);
+
+		eaddr = get_tlb_end(tlbe);
+		vcpu_e500->tlb1_max_eaddr =
+				max(vcpu_e500->tlb1_max_eaddr, eaddr);
+	}
+}
+
+static int kvmppc_need_recalc_tlb1map_range(struct kvmppc_vcpu_e500 *vcpu_e500,
+				struct kvm_book3e_206_tlb_entry *gtlbe)
+{
+	unsigned long start, end, size;
+
+	size = get_tlb_bytes(gtlbe);
+	start = get_tlb_eaddr(gtlbe) & ~(size - 1);
+	end = start + size - 1;
+
+	return vcpu_e500->tlb1_min_eaddr == start ||
+			vcpu_e500->tlb1_max_eaddr == end;
+}
+
+/* This function is supposed to be called for a adding a new valid tlb entry */
+static void kvmppc_set_tlb1map_range(struct kvm_vcpu *vcpu,
+				struct kvm_book3e_206_tlb_entry *gtlbe)
+{
+	unsigned long start, end, size;
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+
+	if (!get_tlb_v(gtlbe))
+		return;
+
+	size = get_tlb_bytes(gtlbe);
+	start = get_tlb_eaddr(gtlbe) & ~(size - 1);
+	end = start + size - 1;
+
+	vcpu_e500->tlb1_min_eaddr = min(vcpu_e500->tlb1_min_eaddr, start);
+	vcpu_e500->tlb1_max_eaddr = max(vcpu_e500->tlb1_max_eaddr, end);
+}
+
+static inline int kvmppc_e500_gtlbe_invalidate(
+				struct kvmppc_vcpu_e500 *vcpu_e500,
+				int tlbsel, int esel)
+{
+	struct kvm_book3e_206_tlb_entry *gtlbe =
+		get_entry(vcpu_e500, tlbsel, esel);
+
+	if (unlikely(get_tlb_iprot(gtlbe)))
+		return -1;
+
+	if (tlbsel == 1 && kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
+		kvmppc_recalc_tlb1map_range(vcpu_e500);
+
+	gtlbe->mas1 = 0;
+
+	return 0;
+}
+
+int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, ulong value)
+{
+	int esel;
+
+	if (value & MMUCSR0_TLB0FI)
+		for (esel = 0; esel < vcpu_e500->gtlb_params[0].entries; esel++)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, 0, esel);
+	if (value & MMUCSR0_TLB1FI)
+		for (esel = 0; esel < vcpu_e500->gtlb_params[1].entries; esel++)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, 1, esel);
+
+	/* Invalidate all vcpu id mappings */
+	kvmppc_e500_tlbil_all(vcpu_e500);
+
+	return EMULATE_DONE;
+}
+
+int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	unsigned int ia;
+	int esel, tlbsel;
+
+	ia = (ea >> 2) & 0x1;
+
+	/* since we only have two TLBs, only lower bit is used. */
+	tlbsel = (ea >> 3) & 0x1;
+
+	if (ia) {
+		/* invalidate all entries */
+		for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries;
+		     esel++)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
+	} else {
+		ea &= 0xfffff000;
+		esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel,
+				get_cur_pid(vcpu), -1);
+		if (esel >= 0)
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
+	}
+
+	/* Invalidate all vcpu id mappings */
+	kvmppc_e500_tlbil_all(vcpu_e500);
+
+	return EMULATE_DONE;
+}
+
+static void tlbilx_all(struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel,
+		       int pid, int type)
+{
+	struct kvm_book3e_206_tlb_entry *tlbe;
+	int tid, esel;
+
+	/* invalidate all entries */
+	for (esel = 0; esel < vcpu_e500->gtlb_params[tlbsel].entries; esel++) {
+		tlbe = get_entry(vcpu_e500, tlbsel, esel);
+		tid = get_tlb_tid(tlbe);
+		if (type == 0 || tid == pid) {
+			inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
+		}
+	}
+}
+
+static void tlbilx_one(struct kvmppc_vcpu_e500 *vcpu_e500, int pid,
+		       gva_t ea)
+{
+	int tlbsel, esel;
+
+	for (tlbsel = 0; tlbsel < 2; tlbsel++) {
+		esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, -1);
+		if (esel >= 0) {
+			inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
+			kvmppc_e500_gtlbe_invalidate(vcpu_e500, tlbsel, esel);
+			break;
+		}
+	}
+}
+
+int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	int pid = get_cur_spid(vcpu);
+
+	if (type == 0 || type == 1) {
+		tlbilx_all(vcpu_e500, 0, pid, type);
+		tlbilx_all(vcpu_e500, 1, pid, type);
+	} else if (type == 3) {
+		tlbilx_one(vcpu_e500, pid, ea);
+	}
+
+	return EMULATE_DONE;
+}
+
+int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	int tlbsel, esel;
+	struct kvm_book3e_206_tlb_entry *gtlbe;
+
+	tlbsel = get_tlb_tlbsel(vcpu);
+	esel = get_tlb_esel(vcpu, tlbsel);
+
+	gtlbe = get_entry(vcpu_e500, tlbsel, esel);
+	vcpu->arch.shared->mas0 &= ~MAS0_NV(~0);
+	vcpu->arch.shared->mas0 |= MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
+	vcpu->arch.shared->mas1 = gtlbe->mas1;
+	vcpu->arch.shared->mas2 = gtlbe->mas2;
+	vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
+
+	return EMULATE_DONE;
+}
+
+int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	int as = !!get_cur_sas(vcpu);
+	unsigned int pid = get_cur_spid(vcpu);
+	int esel, tlbsel;
+	struct kvm_book3e_206_tlb_entry *gtlbe = NULL;
+
+	for (tlbsel = 0; tlbsel < 2; tlbsel++) {
+		esel = kvmppc_e500_tlb_index(vcpu_e500, ea, tlbsel, pid, as);
+		if (esel >= 0) {
+			gtlbe = get_entry(vcpu_e500, tlbsel, esel);
+			break;
+		}
+	}
+
+	if (gtlbe) {
+		esel &= vcpu_e500->gtlb_params[tlbsel].ways - 1;
+
+		vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel) | MAS0_ESEL(esel)
+			| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
+		vcpu->arch.shared->mas1 = gtlbe->mas1;
+		vcpu->arch.shared->mas2 = gtlbe->mas2;
+		vcpu->arch.shared->mas7_3 = gtlbe->mas7_3;
+	} else {
+		int victim;
+
+		/* since we only have two TLBs, only lower bit is used. */
+		tlbsel = vcpu->arch.shared->mas4 >> 28 & 0x1;
+		victim = (tlbsel == 0) ? gtlb0_get_next_victim(vcpu_e500) : 0;
+
+		vcpu->arch.shared->mas0 = MAS0_TLBSEL(tlbsel)
+			| MAS0_ESEL(victim)
+			| MAS0_NV(vcpu_e500->gtlb_nv[tlbsel]);
+		vcpu->arch.shared->mas1 =
+			  (vcpu->arch.shared->mas6 & MAS6_SPID0)
+			| (vcpu->arch.shared->mas6 & (MAS6_SAS ? MAS1_TS : 0))
+			| (vcpu->arch.shared->mas4 & MAS4_TSIZED(~0));
+		vcpu->arch.shared->mas2 &= MAS2_EPN;
+		vcpu->arch.shared->mas2 |= vcpu->arch.shared->mas4 &
+					   MAS2_ATTRIB_MASK;
+		vcpu->arch.shared->mas7_3 &= MAS3_U0 | MAS3_U1 |
+					     MAS3_U2 | MAS3_U3;
+	}
+
+	kvmppc_set_exit_type(vcpu, EMULATED_TLBSX_EXITS);
+	return EMULATE_DONE;
+}
+
+int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	struct kvm_book3e_206_tlb_entry *gtlbe;
+	int tlbsel, esel;
+	int recal = 0;
+
+	tlbsel = get_tlb_tlbsel(vcpu);
+	esel = get_tlb_esel(vcpu, tlbsel);
+
+	gtlbe = get_entry(vcpu_e500, tlbsel, esel);
+
+	if (get_tlb_v(gtlbe)) {
+		inval_gtlbe_on_host(vcpu_e500, tlbsel, esel);
+		if ((tlbsel == 1) &&
+			kvmppc_need_recalc_tlb1map_range(vcpu_e500, gtlbe))
+			recal = 1;
+	}
+
+	gtlbe->mas1 = vcpu->arch.shared->mas1;
+	gtlbe->mas2 = vcpu->arch.shared->mas2;
+	if (!(vcpu->arch.shared->msr & MSR_CM))
+		gtlbe->mas2 &= 0xffffffffUL;
+	gtlbe->mas7_3 = vcpu->arch.shared->mas7_3;
+
+	trace_kvm_booke206_gtlb_write(vcpu->arch.shared->mas0, gtlbe->mas1,
+	                              gtlbe->mas2, gtlbe->mas7_3);
+
+	if (tlbsel == 1) {
+		/*
+		 * If a valid tlb1 entry is overwritten then recalculate the
+		 * min/max TLB1 map address range otherwise no need to look
+		 * in tlb1 array.
+		 */
+		if (recal)
+			kvmppc_recalc_tlb1map_range(vcpu_e500);
+		else
+			kvmppc_set_tlb1map_range(vcpu, gtlbe);
+	}
+
+	/* Invalidate shadow mappings for the about-to-be-clobbered TLBE. */
+	if (tlbe_is_host_safe(vcpu, gtlbe)) {
+		u64 eaddr = get_tlb_eaddr(gtlbe);
+		u64 raddr = get_tlb_raddr(gtlbe);
+
+		if (tlbsel == 0) {
+			gtlbe->mas1 &= ~MAS1_TSIZE(~0);
+			gtlbe->mas1 |= MAS1_TSIZE(BOOK3E_PAGESZ_4K);
+		}
+
+		/* Premap the faulting page */
+		kvmppc_mmu_map(vcpu, eaddr, raddr, index_of(tlbsel, esel));
+	}
+
+	kvmppc_set_exit_type(vcpu, EMULATED_TLBWE_EXITS);
+	return EMULATE_DONE;
+}
+
+static int kvmppc_e500_tlb_search(struct kvm_vcpu *vcpu,
+				  gva_t eaddr, unsigned int pid, int as)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	int esel, tlbsel;
+
+	for (tlbsel = 0; tlbsel < 2; tlbsel++) {
+		esel = kvmppc_e500_tlb_index(vcpu_e500, eaddr, tlbsel, pid, as);
+		if (esel >= 0)
+			return index_of(tlbsel, esel);
+	}
+
+	return -1;
+}
+
+/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
+int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
+                               struct kvm_translation *tr)
+{
+	int index;
+	gva_t eaddr;
+	u8 pid;
+	u8 as;
+
+	eaddr = tr->linear_address;
+	pid = (tr->linear_address >> 32) & 0xff;
+	as = (tr->linear_address >> 40) & 0x1;
+
+	index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
+	if (index < 0) {
+		tr->valid = 0;
+		return 0;
+	}
+
+	tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
+	/* XXX what does "writeable" and "usermode" even mean? */
+	tr->valid = 1;
+
+	return 0;
+}
+
+
+int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
+{
+	unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
+
+	return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
+}
+
+int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr)
+{
+	unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
+
+	return kvmppc_e500_tlb_search(vcpu, eaddr, get_cur_pid(vcpu), as);
+}
+
+void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu)
+{
+	unsigned int as = !!(vcpu->arch.shared->msr & MSR_IS);
+
+	kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.pc, as);
+}
+
+void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu)
+{
+	unsigned int as = !!(vcpu->arch.shared->msr & MSR_DS);
+
+	kvmppc_e500_deliver_tlb_miss(vcpu, vcpu->arch.fault_dear, as);
+}
+
+gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int index,
+			gva_t eaddr)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	struct kvm_book3e_206_tlb_entry *gtlbe;
+	u64 pgmask;
+
+	gtlbe = get_entry(vcpu_e500, tlbsel_of(index), esel_of(index));
+	pgmask = get_tlb_bytes(gtlbe) - 1;
+
+	return get_tlb_raddr(gtlbe) | (eaddr & pgmask);
+}
+
+void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
+{
+}
+
+/*****************************************/
+
+static void free_gtlb(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+	int i;
+
+	clear_tlb1_bitmap(vcpu_e500);
+	kfree(vcpu_e500->g2h_tlb1_map);
+
+	clear_tlb_refs(vcpu_e500);
+	kfree(vcpu_e500->gtlb_priv[0]);
+	kfree(vcpu_e500->gtlb_priv[1]);
+
+	if (vcpu_e500->shared_tlb_pages) {
+		vfree((void *)(round_down((uintptr_t)vcpu_e500->gtlb_arch,
+					  PAGE_SIZE)));
+
+		for (i = 0; i < vcpu_e500->num_shared_tlb_pages; i++) {
+			set_page_dirty_lock(vcpu_e500->shared_tlb_pages[i]);
+			put_page(vcpu_e500->shared_tlb_pages[i]);
+		}
+
+		vcpu_e500->num_shared_tlb_pages = 0;
+
+		kfree(vcpu_e500->shared_tlb_pages);
+		vcpu_e500->shared_tlb_pages = NULL;
+	} else {
+		kfree(vcpu_e500->gtlb_arch);
+	}
+
+	vcpu_e500->gtlb_arch = NULL;
+}
+
+void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+	sregs->u.e.mas0 = vcpu->arch.shared->mas0;
+	sregs->u.e.mas1 = vcpu->arch.shared->mas1;
+	sregs->u.e.mas2 = vcpu->arch.shared->mas2;
+	sregs->u.e.mas7_3 = vcpu->arch.shared->mas7_3;
+	sregs->u.e.mas4 = vcpu->arch.shared->mas4;
+	sregs->u.e.mas6 = vcpu->arch.shared->mas6;
+
+	sregs->u.e.mmucfg = vcpu->arch.mmucfg;
+	sregs->u.e.tlbcfg[0] = vcpu->arch.tlbcfg[0];
+	sregs->u.e.tlbcfg[1] = vcpu->arch.tlbcfg[1];
+	sregs->u.e.tlbcfg[2] = 0;
+	sregs->u.e.tlbcfg[3] = 0;
+}
+
+int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+	if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
+		vcpu->arch.shared->mas0 = sregs->u.e.mas0;
+		vcpu->arch.shared->mas1 = sregs->u.e.mas1;
+		vcpu->arch.shared->mas2 = sregs->u.e.mas2;
+		vcpu->arch.shared->mas7_3 = sregs->u.e.mas7_3;
+		vcpu->arch.shared->mas4 = sregs->u.e.mas4;
+		vcpu->arch.shared->mas6 = sregs->u.e.mas6;
+	}
+
+	return 0;
+}
+
+int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
+			      struct kvm_config_tlb *cfg)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	struct kvm_book3e_206_tlb_params params;
+	char *virt;
+	struct page **pages;
+	struct tlbe_priv *privs[2] = {};
+	u64 *g2h_bitmap = NULL;
+	size_t array_len;
+	u32 sets;
+	int num_pages, ret, i;
+
+	if (cfg->mmu_type != KVM_MMU_FSL_BOOKE_NOHV)
+		return -EINVAL;
+
+	if (copy_from_user(&params, (void __user *)(uintptr_t)cfg->params,
+			   sizeof(params)))
+		return -EFAULT;
+
+	if (params.tlb_sizes[1] > 64)
+		return -EINVAL;
+	if (params.tlb_ways[1] != params.tlb_sizes[1])
+		return -EINVAL;
+	if (params.tlb_sizes[2] != 0 || params.tlb_sizes[3] != 0)
+		return -EINVAL;
+	if (params.tlb_ways[2] != 0 || params.tlb_ways[3] != 0)
+		return -EINVAL;
+
+	if (!is_power_of_2(params.tlb_ways[0]))
+		return -EINVAL;
+
+	sets = params.tlb_sizes[0] >> ilog2(params.tlb_ways[0]);
+	if (!is_power_of_2(sets))
+		return -EINVAL;
+
+	array_len = params.tlb_sizes[0] + params.tlb_sizes[1];
+	array_len *= sizeof(struct kvm_book3e_206_tlb_entry);
+
+	if (cfg->array_len < array_len)
+		return -EINVAL;
+
+	num_pages = DIV_ROUND_UP(cfg->array + array_len - 1, PAGE_SIZE) -
+		    cfg->array / PAGE_SIZE;
+	pages = kmalloc(sizeof(struct page *) * num_pages, GFP_KERNEL);
+	if (!pages)
+		return -ENOMEM;
+
+	ret = get_user_pages_fast(cfg->array, num_pages, 1, pages);
+	if (ret < 0)
+		goto err_pages;
+
+	if (ret != num_pages) {
+		num_pages = ret;
+		ret = -EFAULT;
+		goto err_put_page;
+	}
+
+	virt = vmap(pages, num_pages, VM_MAP, PAGE_KERNEL);
+	if (!virt) {
+		ret = -ENOMEM;
+		goto err_put_page;
+	}
+
+	privs[0] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[0],
+			   GFP_KERNEL);
+	privs[1] = kzalloc(sizeof(struct tlbe_priv) * params.tlb_sizes[1],
+			   GFP_KERNEL);
+
+	if (!privs[0] || !privs[1]) {
+		ret = -ENOMEM;
+		goto err_privs;
+	}
+
+	g2h_bitmap = kzalloc(sizeof(u64) * params.tlb_sizes[1],
+	                     GFP_KERNEL);
+	if (!g2h_bitmap) {
+		ret = -ENOMEM;
+		goto err_privs;
+	}
+
+	free_gtlb(vcpu_e500);
+
+	vcpu_e500->gtlb_priv[0] = privs[0];
+	vcpu_e500->gtlb_priv[1] = privs[1];
+	vcpu_e500->g2h_tlb1_map = g2h_bitmap;
+
+	vcpu_e500->gtlb_arch = (struct kvm_book3e_206_tlb_entry *)
+		(virt + (cfg->array & (PAGE_SIZE - 1)));
+
+	vcpu_e500->gtlb_params[0].entries = params.tlb_sizes[0];
+	vcpu_e500->gtlb_params[1].entries = params.tlb_sizes[1];
+
+	vcpu_e500->gtlb_offset[0] = 0;
+	vcpu_e500->gtlb_offset[1] = params.tlb_sizes[0];
+
+	vcpu->arch.mmucfg = mfspr(SPRN_MMUCFG) & ~MMUCFG_LPIDSIZE;
+
+	vcpu->arch.tlbcfg[0] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+	if (params.tlb_sizes[0] <= 2048)
+		vcpu->arch.tlbcfg[0] |= params.tlb_sizes[0];
+	vcpu->arch.tlbcfg[0] |= params.tlb_ways[0] << TLBnCFG_ASSOC_SHIFT;
+
+	vcpu->arch.tlbcfg[1] &= ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+	vcpu->arch.tlbcfg[1] |= params.tlb_sizes[1];
+	vcpu->arch.tlbcfg[1] |= params.tlb_ways[1] << TLBnCFG_ASSOC_SHIFT;
+
+	vcpu_e500->shared_tlb_pages = pages;
+	vcpu_e500->num_shared_tlb_pages = num_pages;
+
+	vcpu_e500->gtlb_params[0].ways = params.tlb_ways[0];
+	vcpu_e500->gtlb_params[0].sets = sets;
+
+	vcpu_e500->gtlb_params[1].ways = params.tlb_sizes[1];
+	vcpu_e500->gtlb_params[1].sets = 1;
+
+	kvmppc_recalc_tlb1map_range(vcpu_e500);
+	return 0;
+
+err_privs:
+	kfree(privs[0]);
+	kfree(privs[1]);
+
+err_put_page:
+	for (i = 0; i < num_pages; i++)
+		put_page(pages[i]);
+
+err_pages:
+	kfree(pages);
+	return ret;
+}
+
+int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
+			     struct kvm_dirty_tlb *dirty)
+{
+	struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
+	kvmppc_recalc_tlb1map_range(vcpu_e500);
+	clear_tlb_refs(vcpu_e500);
+	return 0;
+}
+
+int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+	struct kvm_vcpu *vcpu = &vcpu_e500->vcpu;
+	int entry_size = sizeof(struct kvm_book3e_206_tlb_entry);
+	int entries = KVM_E500_TLB0_SIZE + KVM_E500_TLB1_SIZE;
+
+	if (e500_mmu_host_init(vcpu_e500))
+		goto err;
+
+	vcpu_e500->gtlb_params[0].entries = KVM_E500_TLB0_SIZE;
+	vcpu_e500->gtlb_params[1].entries = KVM_E500_TLB1_SIZE;
+
+	vcpu_e500->gtlb_params[0].ways = KVM_E500_TLB0_WAY_NUM;
+	vcpu_e500->gtlb_params[0].sets =
+		KVM_E500_TLB0_SIZE / KVM_E500_TLB0_WAY_NUM;
+
+	vcpu_e500->gtlb_params[1].ways = KVM_E500_TLB1_SIZE;
+	vcpu_e500->gtlb_params[1].sets = 1;
+
+	vcpu_e500->gtlb_arch = kmalloc(entries * entry_size, GFP_KERNEL);
+	if (!vcpu_e500->gtlb_arch)
+		return -ENOMEM;
+
+	vcpu_e500->gtlb_offset[0] = 0;
+	vcpu_e500->gtlb_offset[1] = KVM_E500_TLB0_SIZE;
+
+	vcpu_e500->gtlb_priv[0] = kzalloc(sizeof(struct tlbe_ref) *
+					  vcpu_e500->gtlb_params[0].entries,
+					  GFP_KERNEL);
+	if (!vcpu_e500->gtlb_priv[0])
+		goto err;
+
+	vcpu_e500->gtlb_priv[1] = kzalloc(sizeof(struct tlbe_ref) *
+					  vcpu_e500->gtlb_params[1].entries,
+					  GFP_KERNEL);
+	if (!vcpu_e500->gtlb_priv[1])
+		goto err;
+
+	vcpu_e500->g2h_tlb1_map = kzalloc(sizeof(u64) *
+					  vcpu_e500->gtlb_params[1].entries,
+					  GFP_KERNEL);
+	if (!vcpu_e500->g2h_tlb1_map)
+		goto err;
+
+	/* Init TLB configuration register */
+	vcpu->arch.tlbcfg[0] = mfspr(SPRN_TLB0CFG) &
+			     ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+	vcpu->arch.tlbcfg[0] |= vcpu_e500->gtlb_params[0].entries;
+	vcpu->arch.tlbcfg[0] |=
+		vcpu_e500->gtlb_params[0].ways << TLBnCFG_ASSOC_SHIFT;
+
+	vcpu->arch.tlbcfg[1] = mfspr(SPRN_TLB1CFG) &
+			     ~(TLBnCFG_N_ENTRY | TLBnCFG_ASSOC);
+	vcpu->arch.tlbcfg[1] |= vcpu_e500->gtlb_params[1].entries;
+	vcpu->arch.tlbcfg[1] |=
+		vcpu_e500->gtlb_params[1].ways << TLBnCFG_ASSOC_SHIFT;
+
+	kvmppc_recalc_tlb1map_range(vcpu_e500);
+	return 0;
+
+err:
+	free_gtlb(vcpu_e500);
+	return -1;
+}
+
+void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500)
+{
+	free_gtlb(vcpu_e500);
+	e500_mmu_host_uninit(vcpu_e500);
+}