0eaeafa10f
From: Martin Schwidefsky <schwidefsky@de.ibm.com> This patch fixes a bug with cpu bound guest on kvm-s390. Sometimes it was impossible to deliver a signal to a spinning guest. We used preemption as a circumvention. The preemption notifiers called vcpu_load, which checked for pending signals and triggered a host intercept. But even with preemption, a sigkill was not delivered immediately. This patch changes the low level host interrupt handler to check for the SIE instruction, if TIF_WORK is set. In that case we change the instruction pointer of the return PSW to rerun the vcpu_run loop. The kvm code sees an intercept reason 0 if that happens. This patch adds accounting for these types of intercept as well. The advantages: - works with and without preemption - signals are delivered immediately - much better host latencies without preemption Acked-by: Carsten Otte <cotte@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
683 lines
18 KiB
C
683 lines
18 KiB
C
/*
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* s390host.c -- hosting zSeries kernel virtual machines
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*
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* Copyright IBM Corp. 2008
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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 only)
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* as published by the Free Software Foundation.
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*
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* Author(s): Carsten Otte <cotte@de.ibm.com>
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* Christian Borntraeger <borntraeger@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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*/
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#include <linux/compiler.h>
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#include <linux/err.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/kvm.h>
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#include <linux/kvm_host.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/timer.h>
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#include <asm/lowcore.h>
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#include <asm/pgtable.h>
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#include "kvm-s390.h"
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#include "gaccess.h"
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#define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU
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struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ "userspace_handled", VCPU_STAT(exit_userspace) },
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{ "exit_null", VCPU_STAT(exit_null) },
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{ "exit_validity", VCPU_STAT(exit_validity) },
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{ "exit_stop_request", VCPU_STAT(exit_stop_request) },
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{ "exit_external_request", VCPU_STAT(exit_external_request) },
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{ "exit_external_interrupt", VCPU_STAT(exit_external_interrupt) },
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{ "exit_instruction", VCPU_STAT(exit_instruction) },
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{ "exit_program_interruption", VCPU_STAT(exit_program_interruption) },
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{ "exit_instr_and_program_int", VCPU_STAT(exit_instr_and_program) },
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{ "instruction_lctg", VCPU_STAT(instruction_lctg) },
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{ "instruction_lctl", VCPU_STAT(instruction_lctl) },
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{ "deliver_emergency_signal", VCPU_STAT(deliver_emergency_signal) },
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{ "deliver_service_signal", VCPU_STAT(deliver_service_signal) },
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{ "deliver_virtio_interrupt", VCPU_STAT(deliver_virtio_interrupt) },
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{ "deliver_stop_signal", VCPU_STAT(deliver_stop_signal) },
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{ "deliver_prefix_signal", VCPU_STAT(deliver_prefix_signal) },
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{ "deliver_restart_signal", VCPU_STAT(deliver_restart_signal) },
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{ "deliver_program_interruption", VCPU_STAT(deliver_program_int) },
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{ "exit_wait_state", VCPU_STAT(exit_wait_state) },
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{ "instruction_stidp", VCPU_STAT(instruction_stidp) },
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{ "instruction_spx", VCPU_STAT(instruction_spx) },
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{ "instruction_stpx", VCPU_STAT(instruction_stpx) },
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{ "instruction_stap", VCPU_STAT(instruction_stap) },
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{ "instruction_storage_key", VCPU_STAT(instruction_storage_key) },
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{ "instruction_stsch", VCPU_STAT(instruction_stsch) },
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{ "instruction_chsc", VCPU_STAT(instruction_chsc) },
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{ "instruction_stsi", VCPU_STAT(instruction_stsi) },
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{ "instruction_stfl", VCPU_STAT(instruction_stfl) },
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{ "instruction_sigp_sense", VCPU_STAT(instruction_sigp_sense) },
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{ "instruction_sigp_emergency", VCPU_STAT(instruction_sigp_emergency) },
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{ "instruction_sigp_stop", VCPU_STAT(instruction_sigp_stop) },
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{ "instruction_sigp_set_arch", VCPU_STAT(instruction_sigp_arch) },
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{ "instruction_sigp_set_prefix", VCPU_STAT(instruction_sigp_prefix) },
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{ "instruction_sigp_restart", VCPU_STAT(instruction_sigp_restart) },
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{ "diagnose_44", VCPU_STAT(diagnose_44) },
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{ NULL }
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};
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/* Section: not file related */
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void kvm_arch_hardware_enable(void *garbage)
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{
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/* every s390 is virtualization enabled ;-) */
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}
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void kvm_arch_hardware_disable(void *garbage)
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{
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}
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void decache_vcpus_on_cpu(int cpu)
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{
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}
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int kvm_arch_hardware_setup(void)
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{
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return 0;
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}
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void kvm_arch_hardware_unsetup(void)
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{
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}
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void kvm_arch_check_processor_compat(void *rtn)
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{
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}
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int kvm_arch_init(void *opaque)
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{
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return 0;
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}
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void kvm_arch_exit(void)
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{
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}
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/* Section: device related */
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long kvm_arch_dev_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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if (ioctl == KVM_S390_ENABLE_SIE)
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return s390_enable_sie();
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return -EINVAL;
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}
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int kvm_dev_ioctl_check_extension(long ext)
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{
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return 0;
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}
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/* Section: vm related */
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/*
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* Get (and clear) the dirty memory log for a memory slot.
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*/
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int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
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struct kvm_dirty_log *log)
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{
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return 0;
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}
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long kvm_arch_vm_ioctl(struct file *filp,
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unsigned int ioctl, unsigned long arg)
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{
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struct kvm *kvm = filp->private_data;
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void __user *argp = (void __user *)arg;
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int r;
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switch (ioctl) {
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case KVM_S390_INTERRUPT: {
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struct kvm_s390_interrupt s390int;
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r = -EFAULT;
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if (copy_from_user(&s390int, argp, sizeof(s390int)))
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break;
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r = kvm_s390_inject_vm(kvm, &s390int);
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break;
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}
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default:
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r = -EINVAL;
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}
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return r;
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}
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struct kvm *kvm_arch_create_vm(void)
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{
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struct kvm *kvm;
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int rc;
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char debug_name[16];
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rc = s390_enable_sie();
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if (rc)
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goto out_nokvm;
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rc = -ENOMEM;
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kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
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if (!kvm)
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goto out_nokvm;
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kvm->arch.sca = (struct sca_block *) get_zeroed_page(GFP_KERNEL);
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if (!kvm->arch.sca)
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goto out_nosca;
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sprintf(debug_name, "kvm-%u", current->pid);
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kvm->arch.dbf = debug_register(debug_name, 8, 2, 8 * sizeof(long));
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if (!kvm->arch.dbf)
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goto out_nodbf;
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spin_lock_init(&kvm->arch.float_int.lock);
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INIT_LIST_HEAD(&kvm->arch.float_int.list);
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debug_register_view(kvm->arch.dbf, &debug_sprintf_view);
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VM_EVENT(kvm, 3, "%s", "vm created");
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try_module_get(THIS_MODULE);
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return kvm;
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out_nodbf:
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free_page((unsigned long)(kvm->arch.sca));
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out_nosca:
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kfree(kvm);
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out_nokvm:
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return ERR_PTR(rc);
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}
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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
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debug_unregister(kvm->arch.dbf);
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free_page((unsigned long)(kvm->arch.sca));
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kfree(kvm);
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module_put(THIS_MODULE);
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}
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/* Section: vcpu related */
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int kvm_arch_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 kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
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{
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/* kvm common code refers to this, but does'nt call it */
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BUG();
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}
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void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
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{
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save_fp_regs(&vcpu->arch.host_fpregs);
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save_access_regs(vcpu->arch.host_acrs);
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vcpu->arch.guest_fpregs.fpc &= FPC_VALID_MASK;
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restore_fp_regs(&vcpu->arch.guest_fpregs);
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restore_access_regs(vcpu->arch.guest_acrs);
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}
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void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
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{
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save_fp_regs(&vcpu->arch.guest_fpregs);
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save_access_regs(vcpu->arch.guest_acrs);
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restore_fp_regs(&vcpu->arch.host_fpregs);
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restore_access_regs(vcpu->arch.host_acrs);
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}
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static void kvm_s390_vcpu_initial_reset(struct kvm_vcpu *vcpu)
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{
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/* this equals initial cpu reset in pop, but we don't switch to ESA */
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vcpu->arch.sie_block->gpsw.mask = 0UL;
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vcpu->arch.sie_block->gpsw.addr = 0UL;
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vcpu->arch.sie_block->prefix = 0UL;
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vcpu->arch.sie_block->ihcpu = 0xffff;
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vcpu->arch.sie_block->cputm = 0UL;
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vcpu->arch.sie_block->ckc = 0UL;
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vcpu->arch.sie_block->todpr = 0;
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memset(vcpu->arch.sie_block->gcr, 0, 16 * sizeof(__u64));
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vcpu->arch.sie_block->gcr[0] = 0xE0UL;
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vcpu->arch.sie_block->gcr[14] = 0xC2000000UL;
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vcpu->arch.guest_fpregs.fpc = 0;
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asm volatile("lfpc %0" : : "Q" (vcpu->arch.guest_fpregs.fpc));
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vcpu->arch.sie_block->gbea = 1;
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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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atomic_set(&vcpu->arch.sie_block->cpuflags, CPUSTAT_ZARCH);
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vcpu->arch.sie_block->gmslm = 0xffffffffffUL;
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vcpu->arch.sie_block->gmsor = 0x000000000000;
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vcpu->arch.sie_block->ecb = 2;
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vcpu->arch.sie_block->eca = 0xC1002001U;
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setup_timer(&vcpu->arch.ckc_timer, kvm_s390_idle_wakeup,
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(unsigned long) vcpu);
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get_cpu_id(&vcpu->arch.cpu_id);
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vcpu->arch.cpu_id.version = 0xfe;
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return 0;
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}
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struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
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unsigned int id)
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{
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struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL);
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int rc = -ENOMEM;
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if (!vcpu)
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goto out_nomem;
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vcpu->arch.sie_block = (struct sie_block *) get_zeroed_page(GFP_KERNEL);
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if (!vcpu->arch.sie_block)
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goto out_free_cpu;
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vcpu->arch.sie_block->icpua = id;
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BUG_ON(!kvm->arch.sca);
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BUG_ON(kvm->arch.sca->cpu[id].sda);
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kvm->arch.sca->cpu[id].sda = (__u64) vcpu->arch.sie_block;
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vcpu->arch.sie_block->scaoh = (__u32)(((__u64)kvm->arch.sca) >> 32);
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vcpu->arch.sie_block->scaol = (__u32)(__u64)kvm->arch.sca;
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spin_lock_init(&vcpu->arch.local_int.lock);
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INIT_LIST_HEAD(&vcpu->arch.local_int.list);
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vcpu->arch.local_int.float_int = &kvm->arch.float_int;
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spin_lock_bh(&kvm->arch.float_int.lock);
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kvm->arch.float_int.local_int[id] = &vcpu->arch.local_int;
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init_waitqueue_head(&vcpu->arch.local_int.wq);
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vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
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spin_unlock_bh(&kvm->arch.float_int.lock);
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rc = kvm_vcpu_init(vcpu, kvm, id);
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if (rc)
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goto out_free_cpu;
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VM_EVENT(kvm, 3, "create cpu %d at %p, sie block at %p", id, vcpu,
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vcpu->arch.sie_block);
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try_module_get(THIS_MODULE);
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return vcpu;
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out_free_cpu:
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kfree(vcpu);
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out_nomem:
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return ERR_PTR(rc);
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}
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void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
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{
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VCPU_EVENT(vcpu, 3, "%s", "destroy cpu");
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free_page((unsigned long)(vcpu->arch.sie_block));
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kfree(vcpu);
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module_put(THIS_MODULE);
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}
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int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
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{
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/* kvm common code refers to this, but never calls it */
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BUG();
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return 0;
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}
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static int kvm_arch_vcpu_ioctl_initial_reset(struct kvm_vcpu *vcpu)
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{
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vcpu_load(vcpu);
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kvm_s390_vcpu_initial_reset(vcpu);
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vcpu_put(vcpu);
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return 0;
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}
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int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
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{
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vcpu_load(vcpu);
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memcpy(&vcpu->arch.guest_gprs, ®s->gprs, sizeof(regs->gprs));
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vcpu_put(vcpu);
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return 0;
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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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vcpu_load(vcpu);
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memcpy(®s->gprs, &vcpu->arch.guest_gprs, sizeof(regs->gprs));
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vcpu_put(vcpu);
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return 0;
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}
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int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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vcpu_load(vcpu);
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memcpy(&vcpu->arch.guest_acrs, &sregs->acrs, sizeof(sregs->acrs));
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memcpy(&vcpu->arch.sie_block->gcr, &sregs->crs, sizeof(sregs->crs));
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vcpu_put(vcpu);
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return 0;
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}
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int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
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struct kvm_sregs *sregs)
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{
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vcpu_load(vcpu);
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memcpy(&sregs->acrs, &vcpu->arch.guest_acrs, sizeof(sregs->acrs));
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memcpy(&sregs->crs, &vcpu->arch.sie_block->gcr, sizeof(sregs->crs));
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vcpu_put(vcpu);
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return 0;
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}
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int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
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{
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vcpu_load(vcpu);
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memcpy(&vcpu->arch.guest_fpregs.fprs, &fpu->fprs, sizeof(fpu->fprs));
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vcpu->arch.guest_fpregs.fpc = fpu->fpc;
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vcpu_put(vcpu);
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return 0;
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}
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int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
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{
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vcpu_load(vcpu);
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memcpy(&fpu->fprs, &vcpu->arch.guest_fpregs.fprs, sizeof(fpu->fprs));
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fpu->fpc = vcpu->arch.guest_fpregs.fpc;
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vcpu_put(vcpu);
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return 0;
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}
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static int kvm_arch_vcpu_ioctl_set_initial_psw(struct kvm_vcpu *vcpu, psw_t psw)
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{
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int rc = 0;
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vcpu_load(vcpu);
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if (atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_RUNNING)
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rc = -EBUSY;
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else
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vcpu->arch.sie_block->gpsw = psw;
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vcpu_put(vcpu);
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return rc;
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}
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int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
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struct kvm_translation *tr)
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{
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return -EINVAL; /* not implemented yet */
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}
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int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
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struct kvm_debug_guest *dbg)
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{
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return -EINVAL; /* not implemented yet */
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}
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int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state)
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{
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return -EINVAL; /* not implemented yet */
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}
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int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
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struct kvm_mp_state *mp_state)
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{
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return -EINVAL; /* not implemented yet */
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}
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static void __vcpu_run(struct kvm_vcpu *vcpu)
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{
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memcpy(&vcpu->arch.sie_block->gg14, &vcpu->arch.guest_gprs[14], 16);
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if (need_resched())
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schedule();
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vcpu->arch.sie_block->icptcode = 0;
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local_irq_disable();
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kvm_guest_enter();
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local_irq_enable();
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VCPU_EVENT(vcpu, 6, "entering sie flags %x",
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atomic_read(&vcpu->arch.sie_block->cpuflags));
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sie64a(vcpu->arch.sie_block, vcpu->arch.guest_gprs);
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VCPU_EVENT(vcpu, 6, "exit sie icptcode %d",
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vcpu->arch.sie_block->icptcode);
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local_irq_disable();
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kvm_guest_exit();
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local_irq_enable();
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memcpy(&vcpu->arch.guest_gprs[14], &vcpu->arch.sie_block->gg14, 16);
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}
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|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
int rc;
|
|
sigset_t sigsaved;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
|
|
|
|
atomic_set_mask(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
|
|
|
|
BUG_ON(vcpu->kvm->arch.float_int.local_int[vcpu->vcpu_id] == NULL);
|
|
|
|
switch (kvm_run->exit_reason) {
|
|
case KVM_EXIT_S390_SIEIC:
|
|
vcpu->arch.sie_block->gpsw.mask = kvm_run->s390_sieic.mask;
|
|
vcpu->arch.sie_block->gpsw.addr = kvm_run->s390_sieic.addr;
|
|
break;
|
|
case KVM_EXIT_UNKNOWN:
|
|
case KVM_EXIT_S390_RESET:
|
|
break;
|
|
default:
|
|
BUG();
|
|
}
|
|
|
|
might_sleep();
|
|
|
|
do {
|
|
kvm_s390_deliver_pending_interrupts(vcpu);
|
|
__vcpu_run(vcpu);
|
|
rc = kvm_handle_sie_intercept(vcpu);
|
|
} while (!signal_pending(current) && !rc);
|
|
|
|
if (signal_pending(current) && !rc)
|
|
rc = -EINTR;
|
|
|
|
if (rc == -ENOTSUPP) {
|
|
/* intercept cannot be handled in-kernel, prepare kvm-run */
|
|
kvm_run->exit_reason = KVM_EXIT_S390_SIEIC;
|
|
kvm_run->s390_sieic.icptcode = vcpu->arch.sie_block->icptcode;
|
|
kvm_run->s390_sieic.mask = vcpu->arch.sie_block->gpsw.mask;
|
|
kvm_run->s390_sieic.addr = vcpu->arch.sie_block->gpsw.addr;
|
|
kvm_run->s390_sieic.ipa = vcpu->arch.sie_block->ipa;
|
|
kvm_run->s390_sieic.ipb = vcpu->arch.sie_block->ipb;
|
|
rc = 0;
|
|
}
|
|
|
|
if (rc == -EREMOTE) {
|
|
/* intercept was handled, but userspace support is needed
|
|
* kvm_run has been prepared by the handler */
|
|
rc = 0;
|
|
}
|
|
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
vcpu_put(vcpu);
|
|
|
|
vcpu->stat.exit_userspace++;
|
|
return rc;
|
|
}
|
|
|
|
static int __guestcopy(struct kvm_vcpu *vcpu, u64 guestdest, const void *from,
|
|
unsigned long n, int prefix)
|
|
{
|
|
if (prefix)
|
|
return copy_to_guest(vcpu, guestdest, from, n);
|
|
else
|
|
return copy_to_guest_absolute(vcpu, guestdest, from, n);
|
|
}
|
|
|
|
/*
|
|
* store status at address
|
|
* we use have two special cases:
|
|
* KVM_S390_STORE_STATUS_NOADDR: -> 0x1200 on 64 bit
|
|
* KVM_S390_STORE_STATUS_PREFIXED: -> prefix
|
|
*/
|
|
int __kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
|
|
{
|
|
const unsigned char archmode = 1;
|
|
int prefix;
|
|
|
|
if (addr == KVM_S390_STORE_STATUS_NOADDR) {
|
|
if (copy_to_guest_absolute(vcpu, 163ul, &archmode, 1))
|
|
return -EFAULT;
|
|
addr = SAVE_AREA_BASE;
|
|
prefix = 0;
|
|
} else if (addr == KVM_S390_STORE_STATUS_PREFIXED) {
|
|
if (copy_to_guest(vcpu, 163ul, &archmode, 1))
|
|
return -EFAULT;
|
|
addr = SAVE_AREA_BASE;
|
|
prefix = 1;
|
|
} else
|
|
prefix = 0;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, fp_regs),
|
|
vcpu->arch.guest_fpregs.fprs, 128, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, gp_regs),
|
|
vcpu->arch.guest_gprs, 128, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, psw),
|
|
&vcpu->arch.sie_block->gpsw, 16, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, pref_reg),
|
|
&vcpu->arch.sie_block->prefix, 4, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu,
|
|
addr + offsetof(struct save_area_s390x, fp_ctrl_reg),
|
|
&vcpu->arch.guest_fpregs.fpc, 4, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, tod_reg),
|
|
&vcpu->arch.sie_block->todpr, 4, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, timer),
|
|
&vcpu->arch.sie_block->cputm, 8, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, clk_cmp),
|
|
&vcpu->arch.sie_block->ckc, 8, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu, addr + offsetof(struct save_area_s390x, acc_regs),
|
|
&vcpu->arch.guest_acrs, 64, prefix))
|
|
return -EFAULT;
|
|
|
|
if (__guestcopy(vcpu,
|
|
addr + offsetof(struct save_area_s390x, ctrl_regs),
|
|
&vcpu->arch.sie_block->gcr, 128, prefix))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_s390_vcpu_store_status(struct kvm_vcpu *vcpu, unsigned long addr)
|
|
{
|
|
int rc;
|
|
|
|
vcpu_load(vcpu);
|
|
rc = __kvm_s390_vcpu_store_status(vcpu, addr);
|
|
vcpu_put(vcpu);
|
|
return rc;
|
|
}
|
|
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm_vcpu *vcpu = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
switch (ioctl) {
|
|
case KVM_S390_INTERRUPT: {
|
|
struct kvm_s390_interrupt s390int;
|
|
|
|
if (copy_from_user(&s390int, argp, sizeof(s390int)))
|
|
return -EFAULT;
|
|
return kvm_s390_inject_vcpu(vcpu, &s390int);
|
|
}
|
|
case KVM_S390_STORE_STATUS:
|
|
return kvm_s390_vcpu_store_status(vcpu, arg);
|
|
case KVM_S390_SET_INITIAL_PSW: {
|
|
psw_t psw;
|
|
|
|
if (copy_from_user(&psw, argp, sizeof(psw)))
|
|
return -EFAULT;
|
|
return kvm_arch_vcpu_ioctl_set_initial_psw(vcpu, psw);
|
|
}
|
|
case KVM_S390_INITIAL_RESET:
|
|
return kvm_arch_vcpu_ioctl_initial_reset(vcpu);
|
|
default:
|
|
;
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
/* Section: memory related */
|
|
int kvm_arch_set_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem,
|
|
struct kvm_memory_slot old,
|
|
int user_alloc)
|
|
{
|
|
/* A few sanity checks. We can have exactly one memory slot which has
|
|
to start at guest virtual zero and which has to be located at a
|
|
page boundary in userland and which has to end at a page boundary.
|
|
The memory in userland is ok to be fragmented into various different
|
|
vmas. It is okay to mmap() and munmap() stuff in this slot after
|
|
doing this call at any time */
|
|
|
|
if (mem->slot)
|
|
return -EINVAL;
|
|
|
|
if (mem->guest_phys_addr)
|
|
return -EINVAL;
|
|
|
|
if (mem->userspace_addr & (PAGE_SIZE - 1))
|
|
return -EINVAL;
|
|
|
|
if (mem->memory_size & (PAGE_SIZE - 1))
|
|
return -EINVAL;
|
|
|
|
kvm->arch.guest_origin = mem->userspace_addr;
|
|
kvm->arch.guest_memsize = mem->memory_size;
|
|
|
|
/* FIXME: we do want to interrupt running CPUs and update their memory
|
|
configuration now to avoid race conditions. But hey, changing the
|
|
memory layout while virtual CPUs are running is usually bad
|
|
programming practice. */
|
|
|
|
return 0;
|
|
}
|
|
|
|
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
|
|
{
|
|
return gfn;
|
|
}
|
|
|
|
static int __init kvm_s390_init(void)
|
|
{
|
|
return kvm_init(NULL, sizeof(struct kvm_vcpu), THIS_MODULE);
|
|
}
|
|
|
|
static void __exit kvm_s390_exit(void)
|
|
{
|
|
kvm_exit();
|
|
}
|
|
|
|
module_init(kvm_s390_init);
|
|
module_exit(kvm_s390_exit);
|