a136a8bdc0
This enables userspace to get and set various SPRs (special-purpose registers) using the KVM_[GS]ET_ONE_REG ioctls. With this, userspace can get and set all the SPRs that are part of the guest state, either through the KVM_[GS]ET_REGS ioctls, the KVM_[GS]ET_SREGS ioctls, or the KVM_[GS]ET_ONE_REG ioctls. The SPRs that are added here are: - DABR: Data address breakpoint register - DSCR: Data stream control register - PURR: Processor utilization of resources register - SPURR: Scaled PURR - DAR: Data address register - DSISR: Data storage interrupt status register - AMR: Authority mask register - UAMOR: User authority mask override register - MMCR0, MMCR1, MMCRA: Performance monitor unit control registers - PMC1..PMC8: Performance monitor unit counter registers In order to reduce code duplication between PR and HV KVM code, this moves the kvm_vcpu_ioctl_[gs]et_one_reg functions into book3s.c and centralizes the copying between user and kernel space there. The registers that are handled differently between PR and HV, and those that exist only in one flavor, are handled in kvmppc_[gs]et_one_reg() functions that are specific to each flavor. Signed-off-by: Paul Mackerras <paulus@samba.org> [agraf: minimal style fixes] Signed-off-by: Alexander Graf <agraf@suse.de>
569 lines
14 KiB
C
569 lines
14 KiB
C
/*
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* Copyright (C) 2009. SUSE Linux Products GmbH. All rights reserved.
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*
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* Authors:
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* Alexander Graf <agraf@suse.de>
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* Kevin Wolf <mail@kevin-wolf.de>
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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 <linux/export.h>
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#include <linux/slab.h>
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#include <asm/reg.h>
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#include <asm/cputable.h>
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#include <asm/cacheflush.h>
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#include <asm/tlbflush.h>
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#include <asm/uaccess.h>
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#include <asm/io.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_context.h>
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#include <asm/page.h>
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#include <linux/gfp.h>
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#include <linux/sched.h>
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#include <linux/vmalloc.h>
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#include <linux/highmem.h>
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#include "trace.h"
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#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
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/* #define EXIT_DEBUG */
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struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "exits", VCPU_STAT(sum_exits) },
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{ "mmio", VCPU_STAT(mmio_exits) },
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{ "sig", VCPU_STAT(signal_exits) },
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{ "sysc", VCPU_STAT(syscall_exits) },
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{ "inst_emu", VCPU_STAT(emulated_inst_exits) },
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{ "dec", VCPU_STAT(dec_exits) },
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{ "ext_intr", VCPU_STAT(ext_intr_exits) },
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{ "queue_intr", VCPU_STAT(queue_intr) },
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{ "halt_wakeup", VCPU_STAT(halt_wakeup) },
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{ "pf_storage", VCPU_STAT(pf_storage) },
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{ "sp_storage", VCPU_STAT(sp_storage) },
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{ "pf_instruc", VCPU_STAT(pf_instruc) },
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{ "sp_instruc", VCPU_STAT(sp_instruc) },
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{ "ld", VCPU_STAT(ld) },
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{ "ld_slow", VCPU_STAT(ld_slow) },
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{ "st", VCPU_STAT(st) },
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{ "st_slow", VCPU_STAT(st_slow) },
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{ NULL }
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};
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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_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags)
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{
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vcpu->arch.shared->srr0 = kvmppc_get_pc(vcpu);
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vcpu->arch.shared->srr1 = vcpu->arch.shared->msr | flags;
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kvmppc_set_pc(vcpu, kvmppc_interrupt_offset(vcpu) + vec);
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vcpu->arch.mmu.reset_msr(vcpu);
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}
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static int kvmppc_book3s_vec2irqprio(unsigned int vec)
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{
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unsigned int prio;
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switch (vec) {
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case 0x100: prio = BOOK3S_IRQPRIO_SYSTEM_RESET; break;
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case 0x200: prio = BOOK3S_IRQPRIO_MACHINE_CHECK; break;
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case 0x300: prio = BOOK3S_IRQPRIO_DATA_STORAGE; break;
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case 0x380: prio = BOOK3S_IRQPRIO_DATA_SEGMENT; break;
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case 0x400: prio = BOOK3S_IRQPRIO_INST_STORAGE; break;
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case 0x480: prio = BOOK3S_IRQPRIO_INST_SEGMENT; break;
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case 0x500: prio = BOOK3S_IRQPRIO_EXTERNAL; break;
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case 0x501: prio = BOOK3S_IRQPRIO_EXTERNAL_LEVEL; break;
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case 0x600: prio = BOOK3S_IRQPRIO_ALIGNMENT; break;
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case 0x700: prio = BOOK3S_IRQPRIO_PROGRAM; break;
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case 0x800: prio = BOOK3S_IRQPRIO_FP_UNAVAIL; break;
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case 0x900: prio = BOOK3S_IRQPRIO_DECREMENTER; break;
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case 0xc00: prio = BOOK3S_IRQPRIO_SYSCALL; break;
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case 0xd00: prio = BOOK3S_IRQPRIO_DEBUG; break;
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case 0xf20: prio = BOOK3S_IRQPRIO_ALTIVEC; break;
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case 0xf40: prio = BOOK3S_IRQPRIO_VSX; break;
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default: prio = BOOK3S_IRQPRIO_MAX; break;
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}
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return prio;
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}
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static void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
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unsigned int vec)
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{
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unsigned long old_pending = vcpu->arch.pending_exceptions;
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clear_bit(kvmppc_book3s_vec2irqprio(vec),
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&vcpu->arch.pending_exceptions);
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kvmppc_update_int_pending(vcpu, vcpu->arch.pending_exceptions,
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old_pending);
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}
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void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec)
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{
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vcpu->stat.queue_intr++;
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set_bit(kvmppc_book3s_vec2irqprio(vec),
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&vcpu->arch.pending_exceptions);
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#ifdef EXIT_DEBUG
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printk(KERN_INFO "Queueing interrupt %x\n", vec);
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#endif
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}
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void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags)
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{
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/* might as well deliver this straight away */
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kvmppc_inject_interrupt(vcpu, BOOK3S_INTERRUPT_PROGRAM, flags);
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}
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void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu)
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{
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kvmppc_book3s_queue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
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}
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int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu)
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{
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return test_bit(BOOK3S_IRQPRIO_DECREMENTER, &vcpu->arch.pending_exceptions);
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}
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void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu)
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{
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kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_DECREMENTER);
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}
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void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
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struct kvm_interrupt *irq)
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{
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unsigned int vec = BOOK3S_INTERRUPT_EXTERNAL;
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if (irq->irq == KVM_INTERRUPT_SET_LEVEL)
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vec = BOOK3S_INTERRUPT_EXTERNAL_LEVEL;
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kvmppc_book3s_queue_irqprio(vcpu, vec);
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}
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void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu,
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struct kvm_interrupt *irq)
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{
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kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL);
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kvmppc_book3s_dequeue_irqprio(vcpu, BOOK3S_INTERRUPT_EXTERNAL_LEVEL);
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}
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int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu, unsigned int priority)
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{
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int deliver = 1;
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int vec = 0;
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bool crit = kvmppc_critical_section(vcpu);
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switch (priority) {
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case BOOK3S_IRQPRIO_DECREMENTER:
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deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
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vec = BOOK3S_INTERRUPT_DECREMENTER;
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break;
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case BOOK3S_IRQPRIO_EXTERNAL:
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case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
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deliver = (vcpu->arch.shared->msr & MSR_EE) && !crit;
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vec = BOOK3S_INTERRUPT_EXTERNAL;
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break;
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case BOOK3S_IRQPRIO_SYSTEM_RESET:
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vec = BOOK3S_INTERRUPT_SYSTEM_RESET;
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break;
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case BOOK3S_IRQPRIO_MACHINE_CHECK:
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vec = BOOK3S_INTERRUPT_MACHINE_CHECK;
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break;
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case BOOK3S_IRQPRIO_DATA_STORAGE:
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vec = BOOK3S_INTERRUPT_DATA_STORAGE;
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break;
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case BOOK3S_IRQPRIO_INST_STORAGE:
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vec = BOOK3S_INTERRUPT_INST_STORAGE;
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break;
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case BOOK3S_IRQPRIO_DATA_SEGMENT:
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vec = BOOK3S_INTERRUPT_DATA_SEGMENT;
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break;
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case BOOK3S_IRQPRIO_INST_SEGMENT:
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vec = BOOK3S_INTERRUPT_INST_SEGMENT;
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break;
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case BOOK3S_IRQPRIO_ALIGNMENT:
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vec = BOOK3S_INTERRUPT_ALIGNMENT;
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break;
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case BOOK3S_IRQPRIO_PROGRAM:
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vec = BOOK3S_INTERRUPT_PROGRAM;
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break;
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case BOOK3S_IRQPRIO_VSX:
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vec = BOOK3S_INTERRUPT_VSX;
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break;
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case BOOK3S_IRQPRIO_ALTIVEC:
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vec = BOOK3S_INTERRUPT_ALTIVEC;
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break;
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case BOOK3S_IRQPRIO_FP_UNAVAIL:
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vec = BOOK3S_INTERRUPT_FP_UNAVAIL;
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break;
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case BOOK3S_IRQPRIO_SYSCALL:
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vec = BOOK3S_INTERRUPT_SYSCALL;
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break;
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case BOOK3S_IRQPRIO_DEBUG:
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vec = BOOK3S_INTERRUPT_TRACE;
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break;
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case BOOK3S_IRQPRIO_PERFORMANCE_MONITOR:
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vec = BOOK3S_INTERRUPT_PERFMON;
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break;
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default:
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deliver = 0;
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printk(KERN_ERR "KVM: Unknown interrupt: 0x%x\n", priority);
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break;
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}
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#if 0
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printk(KERN_INFO "Deliver interrupt 0x%x? %x\n", vec, deliver);
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#endif
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if (deliver)
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kvmppc_inject_interrupt(vcpu, vec, 0);
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return deliver;
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}
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/*
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* This function determines if an irqprio should be cleared once issued.
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*/
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static bool clear_irqprio(struct kvm_vcpu *vcpu, unsigned int priority)
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{
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switch (priority) {
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case BOOK3S_IRQPRIO_DECREMENTER:
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/* DEC interrupts get cleared by mtdec */
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return false;
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case BOOK3S_IRQPRIO_EXTERNAL_LEVEL:
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/* External interrupts get cleared by userspace */
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return false;
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}
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return true;
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}
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int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu)
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{
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unsigned long *pending = &vcpu->arch.pending_exceptions;
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unsigned long old_pending = vcpu->arch.pending_exceptions;
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unsigned int priority;
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#ifdef EXIT_DEBUG
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if (vcpu->arch.pending_exceptions)
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printk(KERN_EMERG "KVM: Check pending: %lx\n", vcpu->arch.pending_exceptions);
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#endif
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priority = __ffs(*pending);
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while (priority < BOOK3S_IRQPRIO_MAX) {
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if (kvmppc_book3s_irqprio_deliver(vcpu, priority) &&
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clear_irqprio(vcpu, priority)) {
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clear_bit(priority, &vcpu->arch.pending_exceptions);
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break;
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}
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priority = find_next_bit(pending,
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BITS_PER_BYTE * sizeof(*pending),
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priority + 1);
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}
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/* Tell the guest about our interrupt status */
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kvmppc_update_int_pending(vcpu, *pending, old_pending);
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return 0;
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}
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pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn)
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{
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ulong mp_pa = vcpu->arch.magic_page_pa;
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if (!(vcpu->arch.shared->msr & MSR_SF))
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mp_pa = (uint32_t)mp_pa;
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/* Magic page override */
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if (unlikely(mp_pa) &&
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unlikely(((gfn << PAGE_SHIFT) & KVM_PAM) ==
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((mp_pa & PAGE_MASK) & KVM_PAM))) {
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ulong shared_page = ((ulong)vcpu->arch.shared) & PAGE_MASK;
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pfn_t pfn;
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pfn = (pfn_t)virt_to_phys((void*)shared_page) >> PAGE_SHIFT;
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get_page(pfn_to_page(pfn));
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return pfn;
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}
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return gfn_to_pfn(vcpu->kvm, gfn);
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}
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static int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr, bool data,
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struct kvmppc_pte *pte)
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{
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int relocated = (vcpu->arch.shared->msr & (data ? MSR_DR : MSR_IR));
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int r;
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if (relocated) {
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r = vcpu->arch.mmu.xlate(vcpu, eaddr, pte, data);
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} else {
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pte->eaddr = eaddr;
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pte->raddr = eaddr & KVM_PAM;
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pte->vpage = VSID_REAL | eaddr >> 12;
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pte->may_read = true;
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pte->may_write = true;
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pte->may_execute = true;
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r = 0;
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}
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return r;
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}
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static hva_t kvmppc_bad_hva(void)
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{
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return PAGE_OFFSET;
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}
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static hva_t kvmppc_pte_to_hva(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
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bool read)
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{
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hva_t hpage;
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if (read && !pte->may_read)
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goto err;
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if (!read && !pte->may_write)
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goto err;
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hpage = gfn_to_hva(vcpu->kvm, pte->raddr >> PAGE_SHIFT);
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if (kvm_is_error_hva(hpage))
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goto err;
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return hpage | (pte->raddr & ~PAGE_MASK);
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err:
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return kvmppc_bad_hva();
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}
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int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
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bool data)
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{
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struct kvmppc_pte pte;
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vcpu->stat.st++;
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if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
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return -ENOENT;
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*eaddr = pte.raddr;
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if (!pte.may_write)
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return -EPERM;
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if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
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return EMULATE_DO_MMIO;
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return EMULATE_DONE;
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}
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int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
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bool data)
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{
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struct kvmppc_pte pte;
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hva_t hva = *eaddr;
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vcpu->stat.ld++;
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if (kvmppc_xlate(vcpu, *eaddr, data, &pte))
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goto nopte;
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*eaddr = pte.raddr;
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hva = kvmppc_pte_to_hva(vcpu, &pte, true);
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if (kvm_is_error_hva(hva))
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goto mmio;
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if (copy_from_user(ptr, (void __user *)hva, size)) {
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printk(KERN_INFO "kvmppc_ld at 0x%lx failed\n", hva);
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goto mmio;
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}
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return EMULATE_DONE;
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nopte:
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return -ENOENT;
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mmio:
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return EMULATE_DO_MMIO;
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}
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int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
|
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|
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int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu)
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{
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return 0;
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}
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void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu)
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{
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}
|
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|
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int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
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{
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int i;
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regs->pc = kvmppc_get_pc(vcpu);
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regs->cr = kvmppc_get_cr(vcpu);
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regs->ctr = kvmppc_get_ctr(vcpu);
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regs->lr = kvmppc_get_lr(vcpu);
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regs->xer = kvmppc_get_xer(vcpu);
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regs->msr = vcpu->arch.shared->msr;
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regs->srr0 = vcpu->arch.shared->srr0;
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regs->srr1 = vcpu->arch.shared->srr1;
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regs->pid = vcpu->arch.pid;
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regs->sprg0 = vcpu->arch.shared->sprg0;
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regs->sprg1 = vcpu->arch.shared->sprg1;
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regs->sprg2 = vcpu->arch.shared->sprg2;
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regs->sprg3 = vcpu->arch.shared->sprg3;
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regs->sprg4 = vcpu->arch.shared->sprg4;
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regs->sprg5 = vcpu->arch.shared->sprg5;
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regs->sprg6 = vcpu->arch.shared->sprg6;
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regs->sprg7 = vcpu->arch.shared->sprg7;
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for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
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regs->gpr[i] = kvmppc_get_gpr(vcpu, i);
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|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
int i;
|
|
|
|
kvmppc_set_pc(vcpu, regs->pc);
|
|
kvmppc_set_cr(vcpu, regs->cr);
|
|
kvmppc_set_ctr(vcpu, regs->ctr);
|
|
kvmppc_set_lr(vcpu, regs->lr);
|
|
kvmppc_set_xer(vcpu, regs->xer);
|
|
kvmppc_set_msr(vcpu, regs->msr);
|
|
vcpu->arch.shared->srr0 = regs->srr0;
|
|
vcpu->arch.shared->srr1 = regs->srr1;
|
|
vcpu->arch.shared->sprg0 = regs->sprg0;
|
|
vcpu->arch.shared->sprg1 = regs->sprg1;
|
|
vcpu->arch.shared->sprg2 = regs->sprg2;
|
|
vcpu->arch.shared->sprg3 = regs->sprg3;
|
|
vcpu->arch.shared->sprg4 = regs->sprg4;
|
|
vcpu->arch.shared->sprg5 = regs->sprg5;
|
|
vcpu->arch.shared->sprg6 = regs->sprg6;
|
|
vcpu->arch.shared->sprg7 = regs->sprg7;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(regs->gpr); i++)
|
|
kvmppc_set_gpr(vcpu, i, regs->gpr[i]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
|
|
{
|
|
int r;
|
|
union kvmppc_one_reg val;
|
|
int size;
|
|
|
|
size = one_reg_size(reg->id);
|
|
if (size > sizeof(val))
|
|
return -EINVAL;
|
|
|
|
r = kvmppc_get_one_reg(vcpu, reg->id, &val);
|
|
|
|
if (r == -EINVAL) {
|
|
r = 0;
|
|
switch (reg->id) {
|
|
case KVM_REG_PPC_DAR:
|
|
val = get_reg_val(reg->id, vcpu->arch.shared->dar);
|
|
break;
|
|
case KVM_REG_PPC_DSISR:
|
|
val = get_reg_val(reg->id, vcpu->arch.shared->dsisr);
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
if (r)
|
|
return r;
|
|
|
|
if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
|
|
r = -EFAULT;
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
|
|
{
|
|
int r;
|
|
union kvmppc_one_reg val;
|
|
int size;
|
|
|
|
size = one_reg_size(reg->id);
|
|
if (size > sizeof(val))
|
|
return -EINVAL;
|
|
|
|
if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
|
|
return -EFAULT;
|
|
|
|
r = kvmppc_set_one_reg(vcpu, reg->id, &val);
|
|
|
|
if (r == -EINVAL) {
|
|
r = 0;
|
|
switch (reg->id) {
|
|
case KVM_REG_PPC_DAR:
|
|
vcpu->arch.shared->dar = set_reg_val(reg->id, val);
|
|
break;
|
|
case KVM_REG_PPC_DSISR:
|
|
vcpu->arch.shared->dsisr = set_reg_val(reg->id, val);
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvmppc_decrementer_func(unsigned long data)
|
|
{
|
|
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;
|
|
|
|
kvmppc_core_queue_dec(vcpu);
|
|
kvm_vcpu_kick(vcpu);
|
|
}
|