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KVM: ppc: E500 core-specific code
Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Hollis Blanchard
committed by
Avi Kivity
Avi Kivity
parent
17c885eb5c
commit
bc8080cbcc
@@ -0,0 +1,67 @@
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/*
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* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: Yu Liu, <yu.liu@freescale.com>
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*
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* Description:
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* This file is derived from arch/powerpc/include/asm/kvm_44x.h,
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* by Hollis Blanchard <hollisb@us.ibm.com>.
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*
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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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#ifndef __ASM_KVM_E500_H__
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#define __ASM_KVM_E500_H__
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#include <linux/kvm_host.h>
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#define BOOKE_INTERRUPT_SIZE 36
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#define E500_PID_NUM 3
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#define E500_TLB_NUM 2
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struct tlbe{
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u32 mas1;
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u32 mas2;
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u32 mas3;
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u32 mas7;
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};
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struct kvmppc_vcpu_e500 {
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/* Unmodified copy of the guest's TLB. */
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struct tlbe *guest_tlb[E500_TLB_NUM];
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/* TLB that's actually used when the guest is running. */
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struct tlbe *shadow_tlb[E500_TLB_NUM];
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/* Pages which are referenced in the shadow TLB. */
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struct page **shadow_pages[E500_TLB_NUM];
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unsigned int guest_tlb_size[E500_TLB_NUM];
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unsigned int shadow_tlb_size[E500_TLB_NUM];
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unsigned int guest_tlb_nv[E500_TLB_NUM];
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u32 host_pid[E500_PID_NUM];
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u32 pid[E500_PID_NUM];
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u32 mas0;
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u32 mas1;
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u32 mas2;
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u32 mas3;
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u32 mas4;
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u32 mas5;
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u32 mas6;
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u32 mas7;
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u32 l1csr1;
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u32 hid0;
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u32 hid1;
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struct kvm_vcpu vcpu;
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};
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static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
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{
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return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
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}
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#endif /* __ASM_KVM_E500_H__ */
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@@ -43,6 +43,19 @@ config KVM_EXIT_TIMING
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If unsure, say N.
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config KVM_E500
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bool "KVM support for PowerPC E500 processors"
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depends on EXPERIMENTAL && E500
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select KVM
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---help---
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Support running unmodified E500 guest kernels in virtual machines on
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E500 host processors.
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This module provides access to the hardware capabilities through
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a character device node named /dev/kvm.
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If unsure, say N.
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config KVM_TRACE
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bool "KVM trace support"
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depends on KVM && MARKERS && SYSFS
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@@ -22,3 +22,12 @@ kvm-440-objs := \
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44x_tlb.o \
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44x_emulate.o
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obj-$(CONFIG_KVM_440) += kvm-440.o
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kvm-e500-objs := \
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booke.o \
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booke_emulate.o \
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booke_interrupts.o \
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e500.o \
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e500_tlb.o \
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e500_emulate.o
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obj-$(CONFIG_KVM_E500) += kvm-e500.o
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@@ -0,0 +1,151 @@
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/*
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* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: Yu Liu, <yu.liu@freescale.com>
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*
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* Description:
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* This file is derived from arch/powerpc/kvm/44x.c,
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* by Hollis Blanchard <hollisb@us.ibm.com>.
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*
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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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#include <linux/kvm_host.h>
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#include <linux/err.h>
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#include <asm/reg.h>
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#include <asm/cputable.h>
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#include <asm/tlbflush.h>
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#include <asm/kvm_e500.h>
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#include <asm/kvm_ppc.h>
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#include "e500_tlb.h"
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void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
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{
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}
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void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
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{
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}
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void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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kvmppc_e500_tlb_load(vcpu, cpu);
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}
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void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
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{
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kvmppc_e500_tlb_put(vcpu);
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}
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int kvmppc_core_check_processor_compat(void)
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{
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int r;
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if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
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r = 0;
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else
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r = -ENOTSUPP;
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return r;
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}
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int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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kvmppc_e500_tlb_setup(vcpu_e500);
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/* Use the same core vertion as host's */
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vcpu->arch.pvr = mfspr(SPRN_PVR);
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return 0;
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}
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/* 'linear_address' is actually an encoding of AS|PID|EADDR . */
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int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
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struct kvm_translation *tr)
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{
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int index;
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gva_t eaddr;
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u8 pid;
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u8 as;
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eaddr = tr->linear_address;
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pid = (tr->linear_address >> 32) & 0xff;
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as = (tr->linear_address >> 40) & 0x1;
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index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
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if (index < 0) {
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tr->valid = 0;
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return 0;
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}
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tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
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/* XXX what does "writeable" and "usermode" even mean? */
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tr->valid = 1;
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return 0;
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}
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struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500;
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struct kvm_vcpu *vcpu;
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int err;
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vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
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if (!vcpu_e500) {
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err = -ENOMEM;
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goto out;
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}
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vcpu = &vcpu_e500->vcpu;
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err = kvm_vcpu_init(vcpu, kvm, id);
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if (err)
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goto free_vcpu;
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err = kvmppc_e500_tlb_init(vcpu_e500);
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if (err)
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goto uninit_vcpu;
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return vcpu;
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uninit_vcpu:
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kvm_vcpu_uninit(vcpu);
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free_vcpu:
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kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
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out:
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return ERR_PTR(err);
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}
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void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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kvmppc_e500_tlb_uninit(vcpu_e500);
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kvm_vcpu_uninit(vcpu);
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kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
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}
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static int kvmppc_e500_init(void)
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{
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int r;
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r = kvmppc_booke_init();
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if (r)
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return r;
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return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), THIS_MODULE);
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}
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static void kvmppc_e500_exit(void)
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{
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kvmppc_booke_exit();
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}
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module_init(kvmppc_e500_init);
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module_exit(kvmppc_e500_exit);
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@@ -0,0 +1,169 @@
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/*
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* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
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*
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* Author: Yu Liu, <yu.liu@freescale.com>
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*
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* Description:
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* This file is derived from arch/powerpc/kvm/44x_emulate.c,
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* by Hollis Blanchard <hollisb@us.ibm.com>.
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*
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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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#include <asm/kvm_ppc.h>
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#include <asm/disassemble.h>
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#include <asm/kvm_e500.h>
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#include "booke.h"
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#include "e500_tlb.h"
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#define XOP_TLBIVAX 786
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#define XOP_TLBSX 914
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#define XOP_TLBRE 946
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#define XOP_TLBWE 978
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int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
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unsigned int inst, int *advance)
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{
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int emulated = EMULATE_DONE;
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int ra;
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int rb;
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int rs;
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int rt;
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switch (get_op(inst)) {
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case 31:
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switch (get_xop(inst)) {
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case XOP_TLBRE:
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emulated = kvmppc_e500_emul_tlbre(vcpu);
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break;
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case XOP_TLBWE:
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emulated = kvmppc_e500_emul_tlbwe(vcpu);
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break;
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case XOP_TLBSX:
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rb = get_rb(inst);
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emulated = kvmppc_e500_emul_tlbsx(vcpu,rb);
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break;
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case XOP_TLBIVAX:
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ra = get_ra(inst);
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rb = get_rb(inst);
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emulated = kvmppc_e500_emul_tlbivax(vcpu, ra, rb);
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break;
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default:
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emulated = EMULATE_FAIL;
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}
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break;
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default:
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emulated = EMULATE_FAIL;
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}
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if (emulated == EMULATE_FAIL)
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emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
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return emulated;
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}
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int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int emulated = EMULATE_DONE;
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switch (sprn) {
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case SPRN_PID:
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vcpu_e500->pid[0] = vcpu->arch.shadow_pid =
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vcpu->arch.pid = vcpu->arch.gpr[rs];
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break;
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case SPRN_PID1:
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vcpu_e500->pid[1] = vcpu->arch.gpr[rs]; break;
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case SPRN_PID2:
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vcpu_e500->pid[2] = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS0:
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vcpu_e500->mas0 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS1:
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vcpu_e500->mas1 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS2:
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vcpu_e500->mas2 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS3:
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vcpu_e500->mas3 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS4:
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vcpu_e500->mas4 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS6:
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vcpu_e500->mas6 = vcpu->arch.gpr[rs]; break;
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case SPRN_MAS7:
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vcpu_e500->mas7 = vcpu->arch.gpr[rs]; break;
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case SPRN_L1CSR1:
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vcpu_e500->l1csr1 = vcpu->arch.gpr[rs]; break;
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case SPRN_HID0:
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vcpu_e500->hid0 = vcpu->arch.gpr[rs]; break;
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case SPRN_HID1:
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vcpu_e500->hid1 = vcpu->arch.gpr[rs]; break;
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default:
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emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, rs);
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}
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return emulated;
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}
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int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
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{
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
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int emulated = EMULATE_DONE;
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switch (sprn) {
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case SPRN_PID:
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vcpu->arch.gpr[rt] = vcpu_e500->pid[0]; break;
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case SPRN_PID1:
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vcpu->arch.gpr[rt] = vcpu_e500->pid[1]; break;
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case SPRN_PID2:
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vcpu->arch.gpr[rt] = vcpu_e500->pid[2]; break;
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case SPRN_MAS0:
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vcpu->arch.gpr[rt] = vcpu_e500->mas0; break;
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case SPRN_MAS1:
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vcpu->arch.gpr[rt] = vcpu_e500->mas1; break;
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case SPRN_MAS2:
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vcpu->arch.gpr[rt] = vcpu_e500->mas2; break;
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case SPRN_MAS3:
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vcpu->arch.gpr[rt] = vcpu_e500->mas3; break;
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case SPRN_MAS4:
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vcpu->arch.gpr[rt] = vcpu_e500->mas4; break;
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case SPRN_MAS6:
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vcpu->arch.gpr[rt] = vcpu_e500->mas6; break;
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case SPRN_MAS7:
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vcpu->arch.gpr[rt] = vcpu_e500->mas7; break;
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case SPRN_TLB0CFG:
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vcpu->arch.gpr[rt] = mfspr(SPRN_TLB0CFG);
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vcpu->arch.gpr[rt] &= ~0xfffUL;
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vcpu->arch.gpr[rt] |= vcpu_e500->guest_tlb_size[0];
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break;
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case SPRN_TLB1CFG:
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vcpu->arch.gpr[rt] = mfspr(SPRN_TLB1CFG);
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vcpu->arch.gpr[rt] &= ~0xfffUL;
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vcpu->arch.gpr[rt] |= vcpu_e500->guest_tlb_size[1];
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break;
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case SPRN_L1CSR1:
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vcpu->arch.gpr[rt] = vcpu_e500->l1csr1; break;
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case SPRN_HID0:
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vcpu->arch.gpr[rt] = vcpu_e500->hid0; break;
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case SPRN_HID1:
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vcpu->arch.gpr[rt] = vcpu_e500->hid1; break;
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default:
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emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, rt);
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}
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return emulated;
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}
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File diff suppressed because it is too large
Load Diff
@@ -0,0 +1,184 @@
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/*
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* Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved.
|
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*
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* Author: Yu Liu, yu.liu@freescale.com
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*
|
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* Description:
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* This file is based on arch/powerpc/kvm/44x_tlb.h,
|
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* by Hollis Blanchard <hollisb@us.ibm.com>.
|
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*
|
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* 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
|
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* published by the Free Software Foundation.
|
||||
*/
|
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#ifndef __KVM_E500_TLB_H__
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#define __KVM_E500_TLB_H__
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#include <linux/kvm_host.h>
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#include <asm/mmu-fsl-booke.h>
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#include <asm/tlb.h>
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#include <asm/kvm_e500.h>
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#define KVM_E500_TLB0_WAY_SIZE_BIT 7 /* Fixed */
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#define KVM_E500_TLB0_WAY_SIZE (1UL << KVM_E500_TLB0_WAY_SIZE_BIT)
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#define KVM_E500_TLB0_WAY_SIZE_MASK (KVM_E500_TLB0_WAY_SIZE - 1)
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#define KVM_E500_TLB0_WAY_NUM_BIT 1 /* No greater than 7 */
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#define KVM_E500_TLB0_WAY_NUM (1UL << KVM_E500_TLB0_WAY_NUM_BIT)
|
||||
#define KVM_E500_TLB0_WAY_NUM_MASK (KVM_E500_TLB0_WAY_NUM - 1)
|
||||
|
||||
#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
|
||||
#define KVM_E500_TLB1_SIZE 16
|
||||
|
||||
#define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
|
||||
#define tlbsel_of(index) ((index) >> 16)
|
||||
#define esel_of(index) ((index) & 0xFFFF)
|
||||
|
||||
#define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
|
||||
#define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
|
||||
#define MAS2_ATTRIB_MASK \
|
||||
(MAS2_X0 | MAS2_X1 | MAS2_W | MAS2_I | MAS2_M | MAS2_G | MAS2_E)
|
||||
#define MAS3_ATTRIB_MASK \
|
||||
(MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
|
||||
| E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
|
||||
|
||||
extern void kvmppc_dump_tlbs(struct kvm_vcpu *);
|
||||
extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *);
|
||||
extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *);
|
||||
extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int);
|
||||
extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int);
|
||||
extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
|
||||
extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
|
||||
extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
|
||||
extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *);
|
||||
extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *);
|
||||
extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
|
||||
|
||||
/* TLB helper functions */
|
||||
static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
|
||||
{
|
||||
return (tlbe->mas1 >> 8) & 0xf;
|
||||
}
|
||||
|
||||
static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
|
||||
{
|
||||
return tlbe->mas2 & 0xfffff000;
|
||||
}
|
||||
|
||||
static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
|
||||
{
|
||||
unsigned int pgsize = get_tlb_size(tlbe);
|
||||
return 1ULL << 10 << (pgsize << 1);
|
||||
}
|
||||
|
||||
static inline gva_t get_tlb_end(const struct tlbe *tlbe)
|
||||
{
|
||||
u64 bytes = get_tlb_bytes(tlbe);
|
||||
return get_tlb_eaddr(tlbe) + bytes - 1;
|
||||
}
|
||||
|
||||
static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
|
||||
{
|
||||
u64 rpn = tlbe->mas7;
|
||||
return (rpn << 32) | (tlbe->mas3 & 0xfffff000);
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
|
||||
{
|
||||
return (tlbe->mas1 >> 16) & 0xff;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
|
||||
{
|
||||
return (tlbe->mas1 >> 12) & 0x1;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
|
||||
{
|
||||
return (tlbe->mas1 >> 31) & 0x1;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
|
||||
{
|
||||
return (tlbe->mas1 >> 30) & 0x1;
|
||||
}
|
||||
|
||||
static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
|
||||
{
|
||||
return vcpu->arch.pid & 0xff;
|
||||
}
|
||||
|
||||
static inline unsigned int get_cur_spid(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500)
|
||||
{
|
||||
return (vcpu_e500->mas6 >> 16) & 0xff;
|
||||
}
|
||||
|
||||
static inline unsigned int get_cur_sas(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500)
|
||||
{
|
||||
return vcpu_e500->mas6 & 0x1;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_tlbsel(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500)
|
||||
{
|
||||
/*
|
||||
* Manual says that tlbsel has 2 bits wide.
|
||||
* Since we only have tow TLBs, only lower bit is used.
|
||||
*/
|
||||
return (vcpu_e500->mas0 >> 28) & 0x1;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_nv_bit(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500)
|
||||
{
|
||||
return vcpu_e500->mas0 & 0xfff;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_esel_bit(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500)
|
||||
{
|
||||
return (vcpu_e500->mas0 >> 16) & 0xfff;
|
||||
}
|
||||
|
||||
static inline unsigned int get_tlb_esel(
|
||||
const struct kvmppc_vcpu_e500 *vcpu_e500,
|
||||
int tlbsel)
|
||||
{
|
||||
unsigned int esel = get_tlb_esel_bit(vcpu_e500);
|
||||
|
||||
if (tlbsel == 0) {
|
||||
esel &= KVM_E500_TLB0_WAY_NUM_MASK;
|
||||
esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK)
|
||||
<< KVM_E500_TLB0_WAY_NUM_BIT;
|
||||
} else {
|
||||
esel &= KVM_E500_TLB1_SIZE - 1;
|
||||
}
|
||||
|
||||
return esel;
|
||||
}
|
||||
|
||||
static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
|
||||
const struct tlbe *tlbe)
|
||||
{
|
||||
gpa_t gpa;
|
||||
|
||||
if (!get_tlb_v(tlbe))
|
||||
return 0;
|
||||
|
||||
/* Does it match current guest AS? */
|
||||
/* XXX what about IS != DS? */
|
||||
if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS))
|
||||
return 0;
|
||||
|
||||
gpa = get_tlb_raddr(tlbe);
|
||||
if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
|
||||
/* Mapping is not for RAM. */
|
||||
return 0;
|
||||
|
||||
return 1;
|
||||
}
|
||||
|
||||
#endif /* __KVM_E500_TLB_H__ */
|
||||
Reference in New Issue
Block a user