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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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1839 lines
40 KiB
C
1839 lines
40 KiB
C
/*
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* kvm_ia64.c: Basic KVM suppport On Itanium series processors
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*
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*
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* Copyright (C) 2007, Intel Corporation.
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* Xiantao Zhang (xiantao.zhang@intel.com)
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 59 Temple
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* Place - Suite 330, Boston, MA 02111-1307 USA.
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*
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/percpu.h>
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#include <linux/gfp.h>
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#include <linux/fs.h>
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#include <linux/smp.h>
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#include <linux/kvm_host.h>
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#include <linux/kvm.h>
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#include <linux/bitops.h>
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#include <linux/hrtimer.h>
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#include <linux/uaccess.h>
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#include <linux/iommu.h>
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#include <linux/intel-iommu.h>
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#include <asm/pgtable.h>
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#include <asm/gcc_intrin.h>
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#include <asm/pal.h>
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#include <asm/cacheflush.h>
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#include <asm/div64.h>
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#include <asm/tlb.h>
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#include <asm/elf.h>
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#include "misc.h"
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#include "vti.h"
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#include "iodev.h"
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#include "ioapic.h"
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#include "lapic.h"
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#include "irq.h"
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static unsigned long kvm_vmm_base;
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static unsigned long kvm_vsa_base;
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static unsigned long kvm_vm_buffer;
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static unsigned long kvm_vm_buffer_size;
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unsigned long kvm_vmm_gp;
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static long vp_env_info;
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static struct kvm_vmm_info *kvm_vmm_info;
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static DEFINE_PER_CPU(struct kvm_vcpu *, last_vcpu);
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struct kvm_stats_debugfs_item debugfs_entries[] = {
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{ NULL }
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};
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static void kvm_flush_icache(unsigned long start, unsigned long len)
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{
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int l;
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for (l = 0; l < (len + 32); l += 32)
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ia64_fc(start + l);
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ia64_sync_i();
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ia64_srlz_i();
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}
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static void kvm_flush_tlb_all(void)
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{
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unsigned long i, j, count0, count1, stride0, stride1, addr;
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long flags;
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addr = local_cpu_data->ptce_base;
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count0 = local_cpu_data->ptce_count[0];
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count1 = local_cpu_data->ptce_count[1];
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stride0 = local_cpu_data->ptce_stride[0];
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stride1 = local_cpu_data->ptce_stride[1];
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local_irq_save(flags);
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for (i = 0; i < count0; ++i) {
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for (j = 0; j < count1; ++j) {
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ia64_ptce(addr);
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addr += stride1;
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}
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addr += stride0;
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}
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local_irq_restore(flags);
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ia64_srlz_i(); /* srlz.i implies srlz.d */
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}
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long ia64_pal_vp_create(u64 *vpd, u64 *host_iva, u64 *opt_handler)
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{
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struct ia64_pal_retval iprv;
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PAL_CALL_STK(iprv, PAL_VP_CREATE, (u64)vpd, (u64)host_iva,
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(u64)opt_handler);
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return iprv.status;
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}
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static DEFINE_SPINLOCK(vp_lock);
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void kvm_arch_hardware_enable(void *garbage)
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{
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long status;
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long tmp_base;
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unsigned long pte;
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unsigned long saved_psr;
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int slot;
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pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
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PAGE_KERNEL));
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local_irq_save(saved_psr);
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slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
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local_irq_restore(saved_psr);
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if (slot < 0)
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return;
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spin_lock(&vp_lock);
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status = ia64_pal_vp_init_env(kvm_vsa_base ?
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VP_INIT_ENV : VP_INIT_ENV_INITALIZE,
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__pa(kvm_vm_buffer), KVM_VM_BUFFER_BASE, &tmp_base);
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if (status != 0) {
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printk(KERN_WARNING"kvm: Failed to Enable VT Support!!!!\n");
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return ;
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}
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if (!kvm_vsa_base) {
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kvm_vsa_base = tmp_base;
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printk(KERN_INFO"kvm: kvm_vsa_base:0x%lx\n", kvm_vsa_base);
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}
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spin_unlock(&vp_lock);
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ia64_ptr_entry(0x3, slot);
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}
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void kvm_arch_hardware_disable(void *garbage)
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{
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long status;
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int slot;
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unsigned long pte;
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unsigned long saved_psr;
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unsigned long host_iva = ia64_getreg(_IA64_REG_CR_IVA);
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pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base),
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PAGE_KERNEL));
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local_irq_save(saved_psr);
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slot = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
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local_irq_restore(saved_psr);
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if (slot < 0)
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return;
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status = ia64_pal_vp_exit_env(host_iva);
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if (status)
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printk(KERN_DEBUG"kvm: Failed to disable VT support! :%ld\n",
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status);
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ia64_ptr_entry(0x3, slot);
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}
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void kvm_arch_check_processor_compat(void *rtn)
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{
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*(int *)rtn = 0;
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}
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int kvm_dev_ioctl_check_extension(long ext)
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{
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int r;
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switch (ext) {
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case KVM_CAP_IRQCHIP:
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case KVM_CAP_MP_STATE:
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r = 1;
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break;
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case KVM_CAP_COALESCED_MMIO:
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r = KVM_COALESCED_MMIO_PAGE_OFFSET;
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break;
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case KVM_CAP_IOMMU:
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r = iommu_found();
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break;
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default:
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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 struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
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gpa_t addr, int len, int is_write)
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{
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struct kvm_io_device *dev;
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dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, is_write);
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return dev;
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}
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static int handle_vm_error(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
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kvm_run->hw.hardware_exit_reason = 1;
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return 0;
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}
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static int handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct kvm_mmio_req *p;
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struct kvm_io_device *mmio_dev;
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p = kvm_get_vcpu_ioreq(vcpu);
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if ((p->addr & PAGE_MASK) == IOAPIC_DEFAULT_BASE_ADDRESS)
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goto mmio;
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vcpu->mmio_needed = 1;
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vcpu->mmio_phys_addr = kvm_run->mmio.phys_addr = p->addr;
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vcpu->mmio_size = kvm_run->mmio.len = p->size;
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vcpu->mmio_is_write = kvm_run->mmio.is_write = !p->dir;
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if (vcpu->mmio_is_write)
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memcpy(vcpu->mmio_data, &p->data, p->size);
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memcpy(kvm_run->mmio.data, &p->data, p->size);
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kvm_run->exit_reason = KVM_EXIT_MMIO;
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return 0;
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mmio:
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mmio_dev = vcpu_find_mmio_dev(vcpu, p->addr, p->size, !p->dir);
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if (mmio_dev) {
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if (!p->dir)
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kvm_iodevice_write(mmio_dev, p->addr, p->size,
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&p->data);
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else
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kvm_iodevice_read(mmio_dev, p->addr, p->size,
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&p->data);
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} else
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printk(KERN_ERR"kvm: No iodevice found! addr:%lx\n", p->addr);
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p->state = STATE_IORESP_READY;
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return 1;
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}
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static int handle_pal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct exit_ctl_data *p;
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p = kvm_get_exit_data(vcpu);
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if (p->exit_reason == EXIT_REASON_PAL_CALL)
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return kvm_pal_emul(vcpu, kvm_run);
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else {
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kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
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kvm_run->hw.hardware_exit_reason = 2;
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return 0;
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}
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}
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static int handle_sal_call(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct exit_ctl_data *p;
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p = kvm_get_exit_data(vcpu);
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if (p->exit_reason == EXIT_REASON_SAL_CALL) {
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kvm_sal_emul(vcpu);
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return 1;
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} else {
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kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
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kvm_run->hw.hardware_exit_reason = 3;
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return 0;
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}
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}
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/*
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* offset: address offset to IPI space.
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* value: deliver value.
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*/
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static void vcpu_deliver_ipi(struct kvm_vcpu *vcpu, uint64_t dm,
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uint64_t vector)
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{
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switch (dm) {
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case SAPIC_FIXED:
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kvm_apic_set_irq(vcpu, vector, 0);
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break;
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case SAPIC_NMI:
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kvm_apic_set_irq(vcpu, 2, 0);
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break;
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case SAPIC_EXTINT:
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kvm_apic_set_irq(vcpu, 0, 0);
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break;
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case SAPIC_INIT:
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case SAPIC_PMI:
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default:
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printk(KERN_ERR"kvm: Unimplemented Deliver reserved IPI!\n");
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break;
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}
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}
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static struct kvm_vcpu *lid_to_vcpu(struct kvm *kvm, unsigned long id,
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unsigned long eid)
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{
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union ia64_lid lid;
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int i;
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for (i = 0; i < KVM_MAX_VCPUS; i++) {
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if (kvm->vcpus[i]) {
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lid.val = VCPU_LID(kvm->vcpus[i]);
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if (lid.id == id && lid.eid == eid)
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return kvm->vcpus[i];
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}
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}
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return NULL;
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}
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static int handle_ipi(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
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struct kvm_vcpu *target_vcpu;
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struct kvm_pt_regs *regs;
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union ia64_ipi_a addr = p->u.ipi_data.addr;
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union ia64_ipi_d data = p->u.ipi_data.data;
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target_vcpu = lid_to_vcpu(vcpu->kvm, addr.id, addr.eid);
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if (!target_vcpu)
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return handle_vm_error(vcpu, kvm_run);
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if (!target_vcpu->arch.launched) {
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regs = vcpu_regs(target_vcpu);
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regs->cr_iip = vcpu->kvm->arch.rdv_sal_data.boot_ip;
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regs->r1 = vcpu->kvm->arch.rdv_sal_data.boot_gp;
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target_vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
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if (waitqueue_active(&target_vcpu->wq))
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wake_up_interruptible(&target_vcpu->wq);
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} else {
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vcpu_deliver_ipi(target_vcpu, data.dm, data.vector);
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if (target_vcpu != vcpu)
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kvm_vcpu_kick(target_vcpu);
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}
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return 1;
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}
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struct call_data {
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struct kvm_ptc_g ptc_g_data;
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struct kvm_vcpu *vcpu;
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};
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static void vcpu_global_purge(void *info)
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{
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struct call_data *p = (struct call_data *)info;
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struct kvm_vcpu *vcpu = p->vcpu;
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if (test_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
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return;
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set_bit(KVM_REQ_PTC_G, &vcpu->requests);
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if (vcpu->arch.ptc_g_count < MAX_PTC_G_NUM) {
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vcpu->arch.ptc_g_data[vcpu->arch.ptc_g_count++] =
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p->ptc_g_data;
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} else {
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clear_bit(KVM_REQ_PTC_G, &vcpu->requests);
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vcpu->arch.ptc_g_count = 0;
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set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests);
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}
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}
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static int handle_global_purge(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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struct exit_ctl_data *p = kvm_get_exit_data(vcpu);
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struct kvm *kvm = vcpu->kvm;
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struct call_data call_data;
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int i;
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call_data.ptc_g_data = p->u.ptc_g_data;
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for (i = 0; i < KVM_MAX_VCPUS; i++) {
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if (!kvm->vcpus[i] || kvm->vcpus[i]->arch.mp_state ==
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KVM_MP_STATE_UNINITIALIZED ||
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vcpu == kvm->vcpus[i])
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continue;
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if (waitqueue_active(&kvm->vcpus[i]->wq))
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wake_up_interruptible(&kvm->vcpus[i]->wq);
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if (kvm->vcpus[i]->cpu != -1) {
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call_data.vcpu = kvm->vcpus[i];
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smp_call_function_single(kvm->vcpus[i]->cpu,
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vcpu_global_purge, &call_data, 1);
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} else
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printk(KERN_WARNING"kvm: Uninit vcpu received ipi!\n");
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}
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return 1;
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}
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static int handle_switch_rr6(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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{
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return 1;
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}
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int kvm_emulate_halt(struct kvm_vcpu *vcpu)
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{
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ktime_t kt;
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long itc_diff;
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unsigned long vcpu_now_itc;
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unsigned long expires;
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struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
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unsigned long cyc_per_usec = local_cpu_data->cyc_per_usec;
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struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
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if (irqchip_in_kernel(vcpu->kvm)) {
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vcpu_now_itc = ia64_getreg(_IA64_REG_AR_ITC) + vcpu->arch.itc_offset;
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if (time_after(vcpu_now_itc, vpd->itm)) {
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vcpu->arch.timer_check = 1;
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return 1;
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}
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itc_diff = vpd->itm - vcpu_now_itc;
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if (itc_diff < 0)
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itc_diff = -itc_diff;
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expires = div64_u64(itc_diff, cyc_per_usec);
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kt = ktime_set(0, 1000 * expires);
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vcpu->arch.ht_active = 1;
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hrtimer_start(p_ht, kt, HRTIMER_MODE_ABS);
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vcpu->arch.mp_state = KVM_MP_STATE_HALTED;
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kvm_vcpu_block(vcpu);
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hrtimer_cancel(p_ht);
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vcpu->arch.ht_active = 0;
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if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests))
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if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
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vcpu->arch.mp_state =
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KVM_MP_STATE_RUNNABLE;
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if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE)
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return -EINTR;
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return 1;
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} else {
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printk(KERN_ERR"kvm: Unsupported userspace halt!");
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return 0;
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}
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}
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static int handle_vm_shutdown(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run)
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{
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kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
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return 0;
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}
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|
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static int handle_external_interrupt(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run)
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{
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return 1;
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}
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static int handle_vcpu_debug(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run)
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{
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printk("VMM: %s", vcpu->arch.log_buf);
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return 1;
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}
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|
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static int (*kvm_vti_exit_handlers[])(struct kvm_vcpu *vcpu,
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struct kvm_run *kvm_run) = {
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[EXIT_REASON_VM_PANIC] = handle_vm_error,
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[EXIT_REASON_MMIO_INSTRUCTION] = handle_mmio,
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[EXIT_REASON_PAL_CALL] = handle_pal_call,
|
|
[EXIT_REASON_SAL_CALL] = handle_sal_call,
|
|
[EXIT_REASON_SWITCH_RR6] = handle_switch_rr6,
|
|
[EXIT_REASON_VM_DESTROY] = handle_vm_shutdown,
|
|
[EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
|
|
[EXIT_REASON_IPI] = handle_ipi,
|
|
[EXIT_REASON_PTC_G] = handle_global_purge,
|
|
[EXIT_REASON_DEBUG] = handle_vcpu_debug,
|
|
|
|
};
|
|
|
|
static const int kvm_vti_max_exit_handlers =
|
|
sizeof(kvm_vti_exit_handlers)/sizeof(*kvm_vti_exit_handlers);
|
|
|
|
static uint32_t kvm_get_exit_reason(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct exit_ctl_data *p_exit_data;
|
|
|
|
p_exit_data = kvm_get_exit_data(vcpu);
|
|
return p_exit_data->exit_reason;
|
|
}
|
|
|
|
/*
|
|
* The guest has exited. See if we can fix it or if we need userspace
|
|
* assistance.
|
|
*/
|
|
static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
|
|
{
|
|
u32 exit_reason = kvm_get_exit_reason(vcpu);
|
|
vcpu->arch.last_exit = exit_reason;
|
|
|
|
if (exit_reason < kvm_vti_max_exit_handlers
|
|
&& kvm_vti_exit_handlers[exit_reason])
|
|
return kvm_vti_exit_handlers[exit_reason](vcpu, kvm_run);
|
|
else {
|
|
kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
|
|
kvm_run->hw.hardware_exit_reason = exit_reason;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void vti_set_rr6(unsigned long rr6)
|
|
{
|
|
ia64_set_rr(RR6, rr6);
|
|
ia64_srlz_i();
|
|
}
|
|
|
|
static int kvm_insert_vmm_mapping(struct kvm_vcpu *vcpu)
|
|
{
|
|
unsigned long pte;
|
|
struct kvm *kvm = vcpu->kvm;
|
|
int r;
|
|
|
|
/*Insert a pair of tr to map vmm*/
|
|
pte = pte_val(mk_pte_phys(__pa(kvm_vmm_base), PAGE_KERNEL));
|
|
r = ia64_itr_entry(0x3, KVM_VMM_BASE, pte, KVM_VMM_SHIFT);
|
|
if (r < 0)
|
|
goto out;
|
|
vcpu->arch.vmm_tr_slot = r;
|
|
/*Insert a pairt of tr to map data of vm*/
|
|
pte = pte_val(mk_pte_phys(__pa(kvm->arch.vm_base), PAGE_KERNEL));
|
|
r = ia64_itr_entry(0x3, KVM_VM_DATA_BASE,
|
|
pte, KVM_VM_DATA_SHIFT);
|
|
if (r < 0)
|
|
goto out;
|
|
vcpu->arch.vm_tr_slot = r;
|
|
r = 0;
|
|
out:
|
|
return r;
|
|
|
|
}
|
|
|
|
static void kvm_purge_vmm_mapping(struct kvm_vcpu *vcpu)
|
|
{
|
|
|
|
ia64_ptr_entry(0x3, vcpu->arch.vmm_tr_slot);
|
|
ia64_ptr_entry(0x3, vcpu->arch.vm_tr_slot);
|
|
|
|
}
|
|
|
|
static int kvm_vcpu_pre_transition(struct kvm_vcpu *vcpu)
|
|
{
|
|
int cpu = smp_processor_id();
|
|
|
|
if (vcpu->arch.last_run_cpu != cpu ||
|
|
per_cpu(last_vcpu, cpu) != vcpu) {
|
|
per_cpu(last_vcpu, cpu) = vcpu;
|
|
vcpu->arch.last_run_cpu = cpu;
|
|
kvm_flush_tlb_all();
|
|
}
|
|
|
|
vcpu->arch.host_rr6 = ia64_get_rr(RR6);
|
|
vti_set_rr6(vcpu->arch.vmm_rr);
|
|
return kvm_insert_vmm_mapping(vcpu);
|
|
}
|
|
static void kvm_vcpu_post_transition(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_purge_vmm_mapping(vcpu);
|
|
vti_set_rr6(vcpu->arch.host_rr6);
|
|
}
|
|
|
|
static int vti_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
union context *host_ctx, *guest_ctx;
|
|
int r;
|
|
|
|
/*Get host and guest context with guest address space.*/
|
|
host_ctx = kvm_get_host_context(vcpu);
|
|
guest_ctx = kvm_get_guest_context(vcpu);
|
|
|
|
r = kvm_vcpu_pre_transition(vcpu);
|
|
if (r < 0)
|
|
goto out;
|
|
kvm_vmm_info->tramp_entry(host_ctx, guest_ctx);
|
|
kvm_vcpu_post_transition(vcpu);
|
|
r = 0;
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
int r;
|
|
|
|
again:
|
|
preempt_disable();
|
|
local_irq_disable();
|
|
|
|
if (signal_pending(current)) {
|
|
local_irq_enable();
|
|
preempt_enable();
|
|
r = -EINTR;
|
|
kvm_run->exit_reason = KVM_EXIT_INTR;
|
|
goto out;
|
|
}
|
|
|
|
vcpu->guest_mode = 1;
|
|
kvm_guest_enter();
|
|
down_read(&vcpu->kvm->slots_lock);
|
|
r = vti_vcpu_run(vcpu, kvm_run);
|
|
if (r < 0) {
|
|
local_irq_enable();
|
|
preempt_enable();
|
|
kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
|
|
goto out;
|
|
}
|
|
|
|
vcpu->arch.launched = 1;
|
|
vcpu->guest_mode = 0;
|
|
local_irq_enable();
|
|
|
|
/*
|
|
* We must have an instruction between local_irq_enable() and
|
|
* kvm_guest_exit(), so the timer interrupt isn't delayed by
|
|
* the interrupt shadow. The stat.exits increment will do nicely.
|
|
* But we need to prevent reordering, hence this barrier():
|
|
*/
|
|
barrier();
|
|
kvm_guest_exit();
|
|
up_read(&vcpu->kvm->slots_lock);
|
|
preempt_enable();
|
|
|
|
r = kvm_handle_exit(kvm_run, vcpu);
|
|
|
|
if (r > 0) {
|
|
if (!need_resched())
|
|
goto again;
|
|
}
|
|
|
|
out:
|
|
if (r > 0) {
|
|
kvm_resched(vcpu);
|
|
goto again;
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
static void kvm_set_mmio_data(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_mmio_req *p = kvm_get_vcpu_ioreq(vcpu);
|
|
|
|
if (!vcpu->mmio_is_write)
|
|
memcpy(&p->data, vcpu->mmio_data, 8);
|
|
p->state = STATE_IORESP_READY;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
|
|
{
|
|
int r;
|
|
sigset_t sigsaved;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
|
|
|
|
if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
|
|
kvm_vcpu_block(vcpu);
|
|
clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
|
|
r = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
if (vcpu->mmio_needed) {
|
|
memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
|
|
kvm_set_mmio_data(vcpu);
|
|
vcpu->mmio_read_completed = 1;
|
|
vcpu->mmio_needed = 0;
|
|
}
|
|
r = __vcpu_run(vcpu, kvm_run);
|
|
out:
|
|
if (vcpu->sigset_active)
|
|
sigprocmask(SIG_SETMASK, &sigsaved, NULL);
|
|
|
|
vcpu_put(vcpu);
|
|
return r;
|
|
}
|
|
|
|
static struct kvm *kvm_alloc_kvm(void)
|
|
{
|
|
|
|
struct kvm *kvm;
|
|
uint64_t vm_base;
|
|
|
|
BUG_ON(sizeof(struct kvm) > KVM_VM_STRUCT_SIZE);
|
|
|
|
vm_base = __get_free_pages(GFP_KERNEL, get_order(KVM_VM_DATA_SIZE));
|
|
|
|
if (!vm_base)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
|
|
kvm = (struct kvm *)(vm_base +
|
|
offsetof(struct kvm_vm_data, kvm_vm_struct));
|
|
kvm->arch.vm_base = vm_base;
|
|
printk(KERN_DEBUG"kvm: vm's data area:0x%lx\n", vm_base);
|
|
|
|
return kvm;
|
|
}
|
|
|
|
struct kvm_io_range {
|
|
unsigned long start;
|
|
unsigned long size;
|
|
unsigned long type;
|
|
};
|
|
|
|
static const struct kvm_io_range io_ranges[] = {
|
|
{VGA_IO_START, VGA_IO_SIZE, GPFN_FRAME_BUFFER},
|
|
{MMIO_START, MMIO_SIZE, GPFN_LOW_MMIO},
|
|
{LEGACY_IO_START, LEGACY_IO_SIZE, GPFN_LEGACY_IO},
|
|
{IO_SAPIC_START, IO_SAPIC_SIZE, GPFN_IOSAPIC},
|
|
{PIB_START, PIB_SIZE, GPFN_PIB},
|
|
};
|
|
|
|
static void kvm_build_io_pmt(struct kvm *kvm)
|
|
{
|
|
unsigned long i, j;
|
|
|
|
/* Mark I/O ranges */
|
|
for (i = 0; i < (sizeof(io_ranges) / sizeof(struct kvm_io_range));
|
|
i++) {
|
|
for (j = io_ranges[i].start;
|
|
j < io_ranges[i].start + io_ranges[i].size;
|
|
j += PAGE_SIZE)
|
|
kvm_set_pmt_entry(kvm, j >> PAGE_SHIFT,
|
|
io_ranges[i].type, 0);
|
|
}
|
|
|
|
}
|
|
|
|
/*Use unused rids to virtualize guest rid.*/
|
|
#define GUEST_PHYSICAL_RR0 0x1739
|
|
#define GUEST_PHYSICAL_RR4 0x2739
|
|
#define VMM_INIT_RR 0x1660
|
|
|
|
static void kvm_init_vm(struct kvm *kvm)
|
|
{
|
|
BUG_ON(!kvm);
|
|
|
|
kvm->arch.metaphysical_rr0 = GUEST_PHYSICAL_RR0;
|
|
kvm->arch.metaphysical_rr4 = GUEST_PHYSICAL_RR4;
|
|
kvm->arch.vmm_init_rr = VMM_INIT_RR;
|
|
|
|
/*
|
|
*Fill P2M entries for MMIO/IO ranges
|
|
*/
|
|
kvm_build_io_pmt(kvm);
|
|
|
|
INIT_LIST_HEAD(&kvm->arch.assigned_dev_head);
|
|
|
|
/* Reserve bit 0 of irq_sources_bitmap for userspace irq source */
|
|
set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap);
|
|
}
|
|
|
|
struct kvm *kvm_arch_create_vm(void)
|
|
{
|
|
struct kvm *kvm = kvm_alloc_kvm();
|
|
|
|
if (IS_ERR(kvm))
|
|
return ERR_PTR(-ENOMEM);
|
|
kvm_init_vm(kvm);
|
|
|
|
return kvm;
|
|
|
|
}
|
|
|
|
static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm,
|
|
struct kvm_irqchip *chip)
|
|
{
|
|
int r;
|
|
|
|
r = 0;
|
|
switch (chip->chip_id) {
|
|
case KVM_IRQCHIP_IOAPIC:
|
|
memcpy(&chip->chip.ioapic, ioapic_irqchip(kvm),
|
|
sizeof(struct kvm_ioapic_state));
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
|
|
{
|
|
int r;
|
|
|
|
r = 0;
|
|
switch (chip->chip_id) {
|
|
case KVM_IRQCHIP_IOAPIC:
|
|
memcpy(ioapic_irqchip(kvm),
|
|
&chip->chip.ioapic,
|
|
sizeof(struct kvm_ioapic_state));
|
|
break;
|
|
default:
|
|
r = -EINVAL;
|
|
break;
|
|
}
|
|
return r;
|
|
}
|
|
|
|
#define RESTORE_REGS(_x) vcpu->arch._x = regs->_x
|
|
|
|
int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
|
|
int i;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
vpd->vgr[i] = regs->vpd.vgr[i];
|
|
vpd->vbgr[i] = regs->vpd.vbgr[i];
|
|
}
|
|
for (i = 0; i < 128; i++)
|
|
vpd->vcr[i] = regs->vpd.vcr[i];
|
|
vpd->vhpi = regs->vpd.vhpi;
|
|
vpd->vnat = regs->vpd.vnat;
|
|
vpd->vbnat = regs->vpd.vbnat;
|
|
vpd->vpsr = regs->vpd.vpsr;
|
|
|
|
vpd->vpr = regs->vpd.vpr;
|
|
|
|
memcpy(&vcpu->arch.guest, ®s->saved_guest, sizeof(union context));
|
|
|
|
RESTORE_REGS(mp_state);
|
|
RESTORE_REGS(vmm_rr);
|
|
memcpy(vcpu->arch.itrs, regs->itrs, sizeof(struct thash_data) * NITRS);
|
|
memcpy(vcpu->arch.dtrs, regs->dtrs, sizeof(struct thash_data) * NDTRS);
|
|
RESTORE_REGS(itr_regions);
|
|
RESTORE_REGS(dtr_regions);
|
|
RESTORE_REGS(tc_regions);
|
|
RESTORE_REGS(irq_check);
|
|
RESTORE_REGS(itc_check);
|
|
RESTORE_REGS(timer_check);
|
|
RESTORE_REGS(timer_pending);
|
|
RESTORE_REGS(last_itc);
|
|
for (i = 0; i < 8; i++) {
|
|
vcpu->arch.vrr[i] = regs->vrr[i];
|
|
vcpu->arch.ibr[i] = regs->ibr[i];
|
|
vcpu->arch.dbr[i] = regs->dbr[i];
|
|
}
|
|
for (i = 0; i < 4; i++)
|
|
vcpu->arch.insvc[i] = regs->insvc[i];
|
|
RESTORE_REGS(xtp);
|
|
RESTORE_REGS(metaphysical_rr0);
|
|
RESTORE_REGS(metaphysical_rr4);
|
|
RESTORE_REGS(metaphysical_saved_rr0);
|
|
RESTORE_REGS(metaphysical_saved_rr4);
|
|
RESTORE_REGS(fp_psr);
|
|
RESTORE_REGS(saved_gp);
|
|
|
|
vcpu->arch.irq_new_pending = 1;
|
|
vcpu->arch.itc_offset = regs->saved_itc - ia64_getreg(_IA64_REG_AR_ITC);
|
|
set_bit(KVM_REQ_RESUME, &vcpu->requests);
|
|
|
|
vcpu_put(vcpu);
|
|
|
|
return 0;
|
|
}
|
|
|
|
long kvm_arch_vm_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
struct kvm *kvm = filp->private_data;
|
|
void __user *argp = (void __user *)arg;
|
|
int r = -EINVAL;
|
|
|
|
switch (ioctl) {
|
|
case KVM_SET_MEMORY_REGION: {
|
|
struct kvm_memory_region kvm_mem;
|
|
struct kvm_userspace_memory_region kvm_userspace_mem;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
|
|
goto out;
|
|
kvm_userspace_mem.slot = kvm_mem.slot;
|
|
kvm_userspace_mem.flags = kvm_mem.flags;
|
|
kvm_userspace_mem.guest_phys_addr =
|
|
kvm_mem.guest_phys_addr;
|
|
kvm_userspace_mem.memory_size = kvm_mem.memory_size;
|
|
r = kvm_vm_ioctl_set_memory_region(kvm,
|
|
&kvm_userspace_mem, 0);
|
|
if (r)
|
|
goto out;
|
|
break;
|
|
}
|
|
case KVM_CREATE_IRQCHIP:
|
|
r = -EFAULT;
|
|
r = kvm_ioapic_init(kvm);
|
|
if (r)
|
|
goto out;
|
|
break;
|
|
case KVM_IRQ_LINE: {
|
|
struct kvm_irq_level irq_event;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&irq_event, argp, sizeof irq_event))
|
|
goto out;
|
|
if (irqchip_in_kernel(kvm)) {
|
|
mutex_lock(&kvm->lock);
|
|
kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
|
|
irq_event.irq, irq_event.level);
|
|
mutex_unlock(&kvm->lock);
|
|
r = 0;
|
|
}
|
|
break;
|
|
}
|
|
case KVM_GET_IRQCHIP: {
|
|
/* 0: PIC master, 1: PIC slave, 2: IOAPIC */
|
|
struct kvm_irqchip chip;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&chip, argp, sizeof chip))
|
|
goto out;
|
|
r = -ENXIO;
|
|
if (!irqchip_in_kernel(kvm))
|
|
goto out;
|
|
r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
|
|
if (r)
|
|
goto out;
|
|
r = -EFAULT;
|
|
if (copy_to_user(argp, &chip, sizeof chip))
|
|
goto out;
|
|
r = 0;
|
|
break;
|
|
}
|
|
case KVM_SET_IRQCHIP: {
|
|
/* 0: PIC master, 1: PIC slave, 2: IOAPIC */
|
|
struct kvm_irqchip chip;
|
|
|
|
r = -EFAULT;
|
|
if (copy_from_user(&chip, argp, sizeof chip))
|
|
goto out;
|
|
r = -ENXIO;
|
|
if (!irqchip_in_kernel(kvm))
|
|
goto out;
|
|
r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
|
|
if (r)
|
|
goto out;
|
|
r = 0;
|
|
break;
|
|
}
|
|
default:
|
|
;
|
|
}
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
|
|
struct kvm_sregs *sregs)
|
|
{
|
|
return -EINVAL;
|
|
|
|
}
|
|
int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
|
|
struct kvm_translation *tr)
|
|
{
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static int kvm_alloc_vmm_area(void)
|
|
{
|
|
if (!kvm_vmm_base && (kvm_vm_buffer_size < KVM_VM_BUFFER_SIZE)) {
|
|
kvm_vmm_base = __get_free_pages(GFP_KERNEL,
|
|
get_order(KVM_VMM_SIZE));
|
|
if (!kvm_vmm_base)
|
|
return -ENOMEM;
|
|
|
|
memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
|
|
kvm_vm_buffer = kvm_vmm_base + VMM_SIZE;
|
|
|
|
printk(KERN_DEBUG"kvm:VMM's Base Addr:0x%lx, vm_buffer:0x%lx\n",
|
|
kvm_vmm_base, kvm_vm_buffer);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kvm_free_vmm_area(void)
|
|
{
|
|
if (kvm_vmm_base) {
|
|
/*Zero this area before free to avoid bits leak!!*/
|
|
memset((void *)kvm_vmm_base, 0, KVM_VMM_SIZE);
|
|
free_pages(kvm_vmm_base, get_order(KVM_VMM_SIZE));
|
|
kvm_vmm_base = 0;
|
|
kvm_vm_buffer = 0;
|
|
kvm_vsa_base = 0;
|
|
}
|
|
}
|
|
|
|
static void vti_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
|
|
{
|
|
}
|
|
|
|
static int vti_init_vpd(struct kvm_vcpu *vcpu)
|
|
{
|
|
int i;
|
|
union cpuid3_t cpuid3;
|
|
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
|
|
|
|
if (IS_ERR(vpd))
|
|
return PTR_ERR(vpd);
|
|
|
|
/* CPUID init */
|
|
for (i = 0; i < 5; i++)
|
|
vpd->vcpuid[i] = ia64_get_cpuid(i);
|
|
|
|
/* Limit the CPUID number to 5 */
|
|
cpuid3.value = vpd->vcpuid[3];
|
|
cpuid3.number = 4; /* 5 - 1 */
|
|
vpd->vcpuid[3] = cpuid3.value;
|
|
|
|
/*Set vac and vdc fields*/
|
|
vpd->vac.a_from_int_cr = 1;
|
|
vpd->vac.a_to_int_cr = 1;
|
|
vpd->vac.a_from_psr = 1;
|
|
vpd->vac.a_from_cpuid = 1;
|
|
vpd->vac.a_cover = 1;
|
|
vpd->vac.a_bsw = 1;
|
|
vpd->vac.a_int = 1;
|
|
vpd->vdc.d_vmsw = 1;
|
|
|
|
/*Set virtual buffer*/
|
|
vpd->virt_env_vaddr = KVM_VM_BUFFER_BASE;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int vti_create_vp(struct kvm_vcpu *vcpu)
|
|
{
|
|
long ret;
|
|
struct vpd *vpd = vcpu->arch.vpd;
|
|
unsigned long vmm_ivt;
|
|
|
|
vmm_ivt = kvm_vmm_info->vmm_ivt;
|
|
|
|
printk(KERN_DEBUG "kvm: vcpu:%p,ivt: 0x%lx\n", vcpu, vmm_ivt);
|
|
|
|
ret = ia64_pal_vp_create((u64 *)vpd, (u64 *)vmm_ivt, 0);
|
|
|
|
if (ret) {
|
|
printk(KERN_ERR"kvm: ia64_pal_vp_create failed!\n");
|
|
return -EINVAL;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void init_ptce_info(struct kvm_vcpu *vcpu)
|
|
{
|
|
ia64_ptce_info_t ptce = {0};
|
|
|
|
ia64_get_ptce(&ptce);
|
|
vcpu->arch.ptce_base = ptce.base;
|
|
vcpu->arch.ptce_count[0] = ptce.count[0];
|
|
vcpu->arch.ptce_count[1] = ptce.count[1];
|
|
vcpu->arch.ptce_stride[0] = ptce.stride[0];
|
|
vcpu->arch.ptce_stride[1] = ptce.stride[1];
|
|
}
|
|
|
|
static void kvm_migrate_hlt_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct hrtimer *p_ht = &vcpu->arch.hlt_timer;
|
|
|
|
if (hrtimer_cancel(p_ht))
|
|
hrtimer_start_expires(p_ht, HRTIMER_MODE_ABS);
|
|
}
|
|
|
|
static enum hrtimer_restart hlt_timer_fn(struct hrtimer *data)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
wait_queue_head_t *q;
|
|
|
|
vcpu = container_of(data, struct kvm_vcpu, arch.hlt_timer);
|
|
q = &vcpu->wq;
|
|
|
|
if (vcpu->arch.mp_state != KVM_MP_STATE_HALTED)
|
|
goto out;
|
|
|
|
if (waitqueue_active(q))
|
|
wake_up_interruptible(q);
|
|
|
|
out:
|
|
vcpu->arch.timer_fired = 1;
|
|
vcpu->arch.timer_check = 1;
|
|
return HRTIMER_NORESTART;
|
|
}
|
|
|
|
#define PALE_RESET_ENTRY 0x80000000ffffffb0UL
|
|
|
|
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct kvm_vcpu *v;
|
|
int r;
|
|
int i;
|
|
long itc_offset;
|
|
struct kvm *kvm = vcpu->kvm;
|
|
struct kvm_pt_regs *regs = vcpu_regs(vcpu);
|
|
|
|
union context *p_ctx = &vcpu->arch.guest;
|
|
struct kvm_vcpu *vmm_vcpu = to_guest(vcpu->kvm, vcpu);
|
|
|
|
/*Init vcpu context for first run.*/
|
|
if (IS_ERR(vmm_vcpu))
|
|
return PTR_ERR(vmm_vcpu);
|
|
|
|
if (vcpu->vcpu_id == 0) {
|
|
vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
|
|
|
|
/*Set entry address for first run.*/
|
|
regs->cr_iip = PALE_RESET_ENTRY;
|
|
|
|
/*Initialize itc offset for vcpus*/
|
|
itc_offset = 0UL - ia64_getreg(_IA64_REG_AR_ITC);
|
|
for (i = 0; i < KVM_MAX_VCPUS; i++) {
|
|
v = (struct kvm_vcpu *)((char *)vcpu +
|
|
sizeof(struct kvm_vcpu_data) * i);
|
|
v->arch.itc_offset = itc_offset;
|
|
v->arch.last_itc = 0;
|
|
}
|
|
} else
|
|
vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
|
|
|
|
r = -ENOMEM;
|
|
vcpu->arch.apic = kzalloc(sizeof(struct kvm_lapic), GFP_KERNEL);
|
|
if (!vcpu->arch.apic)
|
|
goto out;
|
|
vcpu->arch.apic->vcpu = vcpu;
|
|
|
|
p_ctx->gr[1] = 0;
|
|
p_ctx->gr[12] = (unsigned long)((char *)vmm_vcpu + KVM_STK_OFFSET);
|
|
p_ctx->gr[13] = (unsigned long)vmm_vcpu;
|
|
p_ctx->psr = 0x1008522000UL;
|
|
p_ctx->ar[40] = FPSR_DEFAULT; /*fpsr*/
|
|
p_ctx->caller_unat = 0;
|
|
p_ctx->pr = 0x0;
|
|
p_ctx->ar[36] = 0x0; /*unat*/
|
|
p_ctx->ar[19] = 0x0; /*rnat*/
|
|
p_ctx->ar[18] = (unsigned long)vmm_vcpu +
|
|
((sizeof(struct kvm_vcpu)+15) & ~15);
|
|
p_ctx->ar[64] = 0x0; /*pfs*/
|
|
p_ctx->cr[0] = 0x7e04UL;
|
|
p_ctx->cr[2] = (unsigned long)kvm_vmm_info->vmm_ivt;
|
|
p_ctx->cr[8] = 0x3c;
|
|
|
|
/*Initilize region register*/
|
|
p_ctx->rr[0] = 0x30;
|
|
p_ctx->rr[1] = 0x30;
|
|
p_ctx->rr[2] = 0x30;
|
|
p_ctx->rr[3] = 0x30;
|
|
p_ctx->rr[4] = 0x30;
|
|
p_ctx->rr[5] = 0x30;
|
|
p_ctx->rr[7] = 0x30;
|
|
|
|
/*Initilize branch register 0*/
|
|
p_ctx->br[0] = *(unsigned long *)kvm_vmm_info->vmm_entry;
|
|
|
|
vcpu->arch.vmm_rr = kvm->arch.vmm_init_rr;
|
|
vcpu->arch.metaphysical_rr0 = kvm->arch.metaphysical_rr0;
|
|
vcpu->arch.metaphysical_rr4 = kvm->arch.metaphysical_rr4;
|
|
|
|
hrtimer_init(&vcpu->arch.hlt_timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
|
|
vcpu->arch.hlt_timer.function = hlt_timer_fn;
|
|
|
|
vcpu->arch.last_run_cpu = -1;
|
|
vcpu->arch.vpd = (struct vpd *)VPD_BASE(vcpu->vcpu_id);
|
|
vcpu->arch.vsa_base = kvm_vsa_base;
|
|
vcpu->arch.__gp = kvm_vmm_gp;
|
|
vcpu->arch.dirty_log_lock_pa = __pa(&kvm->arch.dirty_log_lock);
|
|
vcpu->arch.vhpt.hash = (struct thash_data *)VHPT_BASE(vcpu->vcpu_id);
|
|
vcpu->arch.vtlb.hash = (struct thash_data *)VTLB_BASE(vcpu->vcpu_id);
|
|
init_ptce_info(vcpu);
|
|
|
|
r = 0;
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
static int vti_vcpu_setup(struct kvm_vcpu *vcpu, int id)
|
|
{
|
|
unsigned long psr;
|
|
int r;
|
|
|
|
local_irq_save(psr);
|
|
r = kvm_insert_vmm_mapping(vcpu);
|
|
if (r)
|
|
goto fail;
|
|
r = kvm_vcpu_init(vcpu, vcpu->kvm, id);
|
|
if (r)
|
|
goto fail;
|
|
|
|
r = vti_init_vpd(vcpu);
|
|
if (r) {
|
|
printk(KERN_DEBUG"kvm: vpd init error!!\n");
|
|
goto uninit;
|
|
}
|
|
|
|
r = vti_create_vp(vcpu);
|
|
if (r)
|
|
goto uninit;
|
|
|
|
kvm_purge_vmm_mapping(vcpu);
|
|
local_irq_restore(psr);
|
|
|
|
return 0;
|
|
uninit:
|
|
kvm_vcpu_uninit(vcpu);
|
|
fail:
|
|
local_irq_restore(psr);
|
|
return r;
|
|
}
|
|
|
|
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
|
|
unsigned int id)
|
|
{
|
|
struct kvm_vcpu *vcpu;
|
|
unsigned long vm_base = kvm->arch.vm_base;
|
|
int r;
|
|
int cpu;
|
|
|
|
BUG_ON(sizeof(struct kvm_vcpu) > VCPU_STRUCT_SIZE/2);
|
|
|
|
r = -EINVAL;
|
|
if (id >= KVM_MAX_VCPUS) {
|
|
printk(KERN_ERR"kvm: Can't configure vcpus > %ld",
|
|
KVM_MAX_VCPUS);
|
|
goto fail;
|
|
}
|
|
|
|
r = -ENOMEM;
|
|
if (!vm_base) {
|
|
printk(KERN_ERR"kvm: Create vcpu[%d] error!\n", id);
|
|
goto fail;
|
|
}
|
|
vcpu = (struct kvm_vcpu *)(vm_base + offsetof(struct kvm_vm_data,
|
|
vcpu_data[id].vcpu_struct));
|
|
vcpu->kvm = kvm;
|
|
|
|
cpu = get_cpu();
|
|
vti_vcpu_load(vcpu, cpu);
|
|
r = vti_vcpu_setup(vcpu, id);
|
|
put_cpu();
|
|
|
|
if (r) {
|
|
printk(KERN_DEBUG"kvm: vcpu_setup error!!\n");
|
|
goto fail;
|
|
}
|
|
|
|
return vcpu;
|
|
fail:
|
|
return ERR_PTR(r);
|
|
}
|
|
|
|
int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
|
|
struct kvm_debug_guest *dbg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
static void free_kvm(struct kvm *kvm)
|
|
{
|
|
unsigned long vm_base = kvm->arch.vm_base;
|
|
|
|
if (vm_base) {
|
|
memset((void *)vm_base, 0, KVM_VM_DATA_SIZE);
|
|
free_pages(vm_base, get_order(KVM_VM_DATA_SIZE));
|
|
}
|
|
|
|
}
|
|
|
|
static void kvm_release_vm_pages(struct kvm *kvm)
|
|
{
|
|
struct kvm_memory_slot *memslot;
|
|
int i, j;
|
|
unsigned long base_gfn;
|
|
|
|
for (i = 0; i < kvm->nmemslots; i++) {
|
|
memslot = &kvm->memslots[i];
|
|
base_gfn = memslot->base_gfn;
|
|
|
|
for (j = 0; j < memslot->npages; j++) {
|
|
if (memslot->rmap[j])
|
|
put_page((struct page *)memslot->rmap[j]);
|
|
}
|
|
}
|
|
}
|
|
|
|
void kvm_arch_destroy_vm(struct kvm *kvm)
|
|
{
|
|
kvm_iommu_unmap_guest(kvm);
|
|
#ifdef KVM_CAP_DEVICE_ASSIGNMENT
|
|
kvm_free_all_assigned_devices(kvm);
|
|
#endif
|
|
kfree(kvm->arch.vioapic);
|
|
kvm_release_vm_pages(kvm);
|
|
kvm_free_physmem(kvm);
|
|
free_kvm(kvm);
|
|
}
|
|
|
|
void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
|
|
{
|
|
}
|
|
|
|
void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
|
|
{
|
|
if (cpu != vcpu->cpu) {
|
|
vcpu->cpu = cpu;
|
|
if (vcpu->arch.ht_active)
|
|
kvm_migrate_hlt_timer(vcpu);
|
|
}
|
|
}
|
|
|
|
#define SAVE_REGS(_x) regs->_x = vcpu->arch._x
|
|
|
|
int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
|
|
{
|
|
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
|
|
int i;
|
|
|
|
vcpu_load(vcpu);
|
|
|
|
for (i = 0; i < 16; i++) {
|
|
regs->vpd.vgr[i] = vpd->vgr[i];
|
|
regs->vpd.vbgr[i] = vpd->vbgr[i];
|
|
}
|
|
for (i = 0; i < 128; i++)
|
|
regs->vpd.vcr[i] = vpd->vcr[i];
|
|
regs->vpd.vhpi = vpd->vhpi;
|
|
regs->vpd.vnat = vpd->vnat;
|
|
regs->vpd.vbnat = vpd->vbnat;
|
|
regs->vpd.vpsr = vpd->vpsr;
|
|
regs->vpd.vpr = vpd->vpr;
|
|
|
|
memcpy(®s->saved_guest, &vcpu->arch.guest, sizeof(union context));
|
|
|
|
SAVE_REGS(mp_state);
|
|
SAVE_REGS(vmm_rr);
|
|
memcpy(regs->itrs, vcpu->arch.itrs, sizeof(struct thash_data) * NITRS);
|
|
memcpy(regs->dtrs, vcpu->arch.dtrs, sizeof(struct thash_data) * NDTRS);
|
|
SAVE_REGS(itr_regions);
|
|
SAVE_REGS(dtr_regions);
|
|
SAVE_REGS(tc_regions);
|
|
SAVE_REGS(irq_check);
|
|
SAVE_REGS(itc_check);
|
|
SAVE_REGS(timer_check);
|
|
SAVE_REGS(timer_pending);
|
|
SAVE_REGS(last_itc);
|
|
for (i = 0; i < 8; i++) {
|
|
regs->vrr[i] = vcpu->arch.vrr[i];
|
|
regs->ibr[i] = vcpu->arch.ibr[i];
|
|
regs->dbr[i] = vcpu->arch.dbr[i];
|
|
}
|
|
for (i = 0; i < 4; i++)
|
|
regs->insvc[i] = vcpu->arch.insvc[i];
|
|
regs->saved_itc = vcpu->arch.itc_offset + ia64_getreg(_IA64_REG_AR_ITC);
|
|
SAVE_REGS(xtp);
|
|
SAVE_REGS(metaphysical_rr0);
|
|
SAVE_REGS(metaphysical_rr4);
|
|
SAVE_REGS(metaphysical_saved_rr0);
|
|
SAVE_REGS(metaphysical_saved_rr4);
|
|
SAVE_REGS(fp_psr);
|
|
SAVE_REGS(saved_gp);
|
|
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
|
|
{
|
|
|
|
hrtimer_cancel(&vcpu->arch.hlt_timer);
|
|
kfree(vcpu->arch.apic);
|
|
}
|
|
|
|
|
|
long kvm_arch_vcpu_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
int kvm_arch_set_memory_region(struct kvm *kvm,
|
|
struct kvm_userspace_memory_region *mem,
|
|
struct kvm_memory_slot old,
|
|
int user_alloc)
|
|
{
|
|
unsigned long i;
|
|
unsigned long pfn;
|
|
int npages = mem->memory_size >> PAGE_SHIFT;
|
|
struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot];
|
|
unsigned long base_gfn = memslot->base_gfn;
|
|
|
|
if (base_gfn + npages > (KVM_MAX_MEM_SIZE >> PAGE_SHIFT))
|
|
return -ENOMEM;
|
|
|
|
for (i = 0; i < npages; i++) {
|
|
pfn = gfn_to_pfn(kvm, base_gfn + i);
|
|
if (!kvm_is_mmio_pfn(pfn)) {
|
|
kvm_set_pmt_entry(kvm, base_gfn + i,
|
|
pfn << PAGE_SHIFT,
|
|
_PAGE_AR_RWX | _PAGE_MA_WB);
|
|
memslot->rmap[i] = (unsigned long)pfn_to_page(pfn);
|
|
} else {
|
|
kvm_set_pmt_entry(kvm, base_gfn + i,
|
|
GPFN_PHYS_MMIO | (pfn << PAGE_SHIFT),
|
|
_PAGE_MA_UC);
|
|
memslot->rmap[i] = 0;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_flush_shadow(struct kvm *kvm)
|
|
{
|
|
}
|
|
|
|
long kvm_arch_dev_ioctl(struct file *filp,
|
|
unsigned int ioctl, unsigned long arg)
|
|
{
|
|
return -EINVAL;
|
|
}
|
|
|
|
void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
|
|
{
|
|
kvm_vcpu_uninit(vcpu);
|
|
}
|
|
|
|
static int vti_cpu_has_kvm_support(void)
|
|
{
|
|
long avail = 1, status = 1, control = 1;
|
|
long ret;
|
|
|
|
ret = ia64_pal_proc_get_features(&avail, &status, &control, 0);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (!(avail & PAL_PROC_VM_BIT))
|
|
goto out;
|
|
|
|
printk(KERN_DEBUG"kvm: Hardware Supports VT\n");
|
|
|
|
ret = ia64_pal_vp_env_info(&kvm_vm_buffer_size, &vp_env_info);
|
|
if (ret)
|
|
goto out;
|
|
printk(KERN_DEBUG"kvm: VM Buffer Size:0x%lx\n", kvm_vm_buffer_size);
|
|
|
|
if (!(vp_env_info & VP_OPCODE)) {
|
|
printk(KERN_WARNING"kvm: No opcode ability on hardware, "
|
|
"vm_env_info:0x%lx\n", vp_env_info);
|
|
}
|
|
|
|
return 1;
|
|
out:
|
|
return 0;
|
|
}
|
|
|
|
static int kvm_relocate_vmm(struct kvm_vmm_info *vmm_info,
|
|
struct module *module)
|
|
{
|
|
unsigned long module_base;
|
|
unsigned long vmm_size;
|
|
|
|
unsigned long vmm_offset, func_offset, fdesc_offset;
|
|
struct fdesc *p_fdesc;
|
|
|
|
BUG_ON(!module);
|
|
|
|
if (!kvm_vmm_base) {
|
|
printk("kvm: kvm area hasn't been initilized yet!!\n");
|
|
return -EFAULT;
|
|
}
|
|
|
|
/*Calculate new position of relocated vmm module.*/
|
|
module_base = (unsigned long)module->module_core;
|
|
vmm_size = module->core_size;
|
|
if (unlikely(vmm_size > KVM_VMM_SIZE))
|
|
return -EFAULT;
|
|
|
|
memcpy((void *)kvm_vmm_base, (void *)module_base, vmm_size);
|
|
kvm_flush_icache(kvm_vmm_base, vmm_size);
|
|
|
|
/*Recalculate kvm_vmm_info based on new VMM*/
|
|
vmm_offset = vmm_info->vmm_ivt - module_base;
|
|
kvm_vmm_info->vmm_ivt = KVM_VMM_BASE + vmm_offset;
|
|
printk(KERN_DEBUG"kvm: Relocated VMM's IVT Base Addr:%lx\n",
|
|
kvm_vmm_info->vmm_ivt);
|
|
|
|
fdesc_offset = (unsigned long)vmm_info->vmm_entry - module_base;
|
|
kvm_vmm_info->vmm_entry = (kvm_vmm_entry *)(KVM_VMM_BASE +
|
|
fdesc_offset);
|
|
func_offset = *(unsigned long *)vmm_info->vmm_entry - module_base;
|
|
p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
|
|
p_fdesc->ip = KVM_VMM_BASE + func_offset;
|
|
p_fdesc->gp = KVM_VMM_BASE+(p_fdesc->gp - module_base);
|
|
|
|
printk(KERN_DEBUG"kvm: Relocated VMM's Init Entry Addr:%lx\n",
|
|
KVM_VMM_BASE+func_offset);
|
|
|
|
fdesc_offset = (unsigned long)vmm_info->tramp_entry - module_base;
|
|
kvm_vmm_info->tramp_entry = (kvm_tramp_entry *)(KVM_VMM_BASE +
|
|
fdesc_offset);
|
|
func_offset = *(unsigned long *)vmm_info->tramp_entry - module_base;
|
|
p_fdesc = (struct fdesc *)(kvm_vmm_base + fdesc_offset);
|
|
p_fdesc->ip = KVM_VMM_BASE + func_offset;
|
|
p_fdesc->gp = KVM_VMM_BASE + (p_fdesc->gp - module_base);
|
|
|
|
kvm_vmm_gp = p_fdesc->gp;
|
|
|
|
printk(KERN_DEBUG"kvm: Relocated VMM's Entry IP:%p\n",
|
|
kvm_vmm_info->vmm_entry);
|
|
printk(KERN_DEBUG"kvm: Relocated VMM's Trampoline Entry IP:0x%lx\n",
|
|
KVM_VMM_BASE + func_offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int kvm_arch_init(void *opaque)
|
|
{
|
|
int r;
|
|
struct kvm_vmm_info *vmm_info = (struct kvm_vmm_info *)opaque;
|
|
|
|
if (!vti_cpu_has_kvm_support()) {
|
|
printk(KERN_ERR "kvm: No Hardware Virtualization Support!\n");
|
|
r = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
if (kvm_vmm_info) {
|
|
printk(KERN_ERR "kvm: Already loaded VMM module!\n");
|
|
r = -EEXIST;
|
|
goto out;
|
|
}
|
|
|
|
r = -ENOMEM;
|
|
kvm_vmm_info = kzalloc(sizeof(struct kvm_vmm_info), GFP_KERNEL);
|
|
if (!kvm_vmm_info)
|
|
goto out;
|
|
|
|
if (kvm_alloc_vmm_area())
|
|
goto out_free0;
|
|
|
|
r = kvm_relocate_vmm(vmm_info, vmm_info->module);
|
|
if (r)
|
|
goto out_free1;
|
|
|
|
return 0;
|
|
|
|
out_free1:
|
|
kvm_free_vmm_area();
|
|
out_free0:
|
|
kfree(kvm_vmm_info);
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
void kvm_arch_exit(void)
|
|
{
|
|
kvm_free_vmm_area();
|
|
kfree(kvm_vmm_info);
|
|
kvm_vmm_info = NULL;
|
|
}
|
|
|
|
static int kvm_ia64_sync_dirty_log(struct kvm *kvm,
|
|
struct kvm_dirty_log *log)
|
|
{
|
|
struct kvm_memory_slot *memslot;
|
|
int r, i;
|
|
long n, base;
|
|
unsigned long *dirty_bitmap = (unsigned long *)(kvm->arch.vm_base +
|
|
offsetof(struct kvm_vm_data, kvm_mem_dirty_log));
|
|
|
|
r = -EINVAL;
|
|
if (log->slot >= KVM_MEMORY_SLOTS)
|
|
goto out;
|
|
|
|
memslot = &kvm->memslots[log->slot];
|
|
r = -ENOENT;
|
|
if (!memslot->dirty_bitmap)
|
|
goto out;
|
|
|
|
n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
|
|
base = memslot->base_gfn / BITS_PER_LONG;
|
|
|
|
for (i = 0; i < n/sizeof(long); ++i) {
|
|
memslot->dirty_bitmap[i] = dirty_bitmap[base + i];
|
|
dirty_bitmap[base + i] = 0;
|
|
}
|
|
r = 0;
|
|
out:
|
|
return r;
|
|
}
|
|
|
|
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
|
|
struct kvm_dirty_log *log)
|
|
{
|
|
int r;
|
|
int n;
|
|
struct kvm_memory_slot *memslot;
|
|
int is_dirty = 0;
|
|
|
|
spin_lock(&kvm->arch.dirty_log_lock);
|
|
|
|
r = kvm_ia64_sync_dirty_log(kvm, log);
|
|
if (r)
|
|
goto out;
|
|
|
|
r = kvm_get_dirty_log(kvm, log, &is_dirty);
|
|
if (r)
|
|
goto out;
|
|
|
|
/* If nothing is dirty, don't bother messing with page tables. */
|
|
if (is_dirty) {
|
|
kvm_flush_remote_tlbs(kvm);
|
|
memslot = &kvm->memslots[log->slot];
|
|
n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
|
|
memset(memslot->dirty_bitmap, 0, n);
|
|
}
|
|
r = 0;
|
|
out:
|
|
spin_unlock(&kvm->arch.dirty_log_lock);
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_hardware_setup(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void kvm_arch_hardware_unsetup(void)
|
|
{
|
|
}
|
|
|
|
static void vcpu_kick_intr(void *info)
|
|
{
|
|
#ifdef DEBUG
|
|
struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info;
|
|
printk(KERN_DEBUG"vcpu_kick_intr %p \n", vcpu);
|
|
#endif
|
|
}
|
|
|
|
void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
|
|
{
|
|
int ipi_pcpu = vcpu->cpu;
|
|
int cpu = get_cpu();
|
|
|
|
if (waitqueue_active(&vcpu->wq))
|
|
wake_up_interruptible(&vcpu->wq);
|
|
|
|
if (vcpu->guest_mode && cpu != ipi_pcpu)
|
|
smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0);
|
|
put_cpu();
|
|
}
|
|
|
|
int kvm_apic_set_irq(struct kvm_vcpu *vcpu, u8 vec, u8 trig)
|
|
{
|
|
|
|
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
|
|
|
|
if (!test_and_set_bit(vec, &vpd->irr[0])) {
|
|
vcpu->arch.irq_new_pending = 1;
|
|
kvm_vcpu_kick(vcpu);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int kvm_apic_match_physical_addr(struct kvm_lapic *apic, u16 dest)
|
|
{
|
|
return apic->vcpu->vcpu_id == dest;
|
|
}
|
|
|
|
int kvm_apic_match_logical_addr(struct kvm_lapic *apic, u8 mda)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
struct kvm_vcpu *kvm_get_lowest_prio_vcpu(struct kvm *kvm, u8 vector,
|
|
unsigned long bitmap)
|
|
{
|
|
struct kvm_vcpu *lvcpu = kvm->vcpus[0];
|
|
int i;
|
|
|
|
for (i = 1; i < KVM_MAX_VCPUS; i++) {
|
|
if (!kvm->vcpus[i])
|
|
continue;
|
|
if (lvcpu->arch.xtp > kvm->vcpus[i]->arch.xtp)
|
|
lvcpu = kvm->vcpus[i];
|
|
}
|
|
|
|
return lvcpu;
|
|
}
|
|
|
|
static int find_highest_bits(int *dat)
|
|
{
|
|
u32 bits, bitnum;
|
|
int i;
|
|
|
|
/* loop for all 256 bits */
|
|
for (i = 7; i >= 0 ; i--) {
|
|
bits = dat[i];
|
|
if (bits) {
|
|
bitnum = fls(bits);
|
|
return i * 32 + bitnum - 1;
|
|
}
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
int kvm_highest_pending_irq(struct kvm_vcpu *vcpu)
|
|
{
|
|
struct vpd *vpd = to_host(vcpu->kvm, vcpu->arch.vpd);
|
|
|
|
if (vpd->irr[0] & (1UL << NMI_VECTOR))
|
|
return NMI_VECTOR;
|
|
if (vpd->irr[0] & (1UL << ExtINT_VECTOR))
|
|
return ExtINT_VECTOR;
|
|
|
|
return find_highest_bits((int *)&vpd->irr[0]);
|
|
}
|
|
|
|
int kvm_cpu_has_interrupt(struct kvm_vcpu *vcpu)
|
|
{
|
|
if (kvm_highest_pending_irq(vcpu) != -1)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.timer_fired;
|
|
}
|
|
|
|
gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
|
|
{
|
|
return gfn;
|
|
}
|
|
|
|
int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu)
|
|
{
|
|
return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
vcpu_load(vcpu);
|
|
mp_state->mp_state = vcpu->arch.mp_state;
|
|
vcpu_put(vcpu);
|
|
return 0;
|
|
}
|
|
|
|
static int vcpu_reset(struct kvm_vcpu *vcpu)
|
|
{
|
|
int r;
|
|
long psr;
|
|
local_irq_save(psr);
|
|
r = kvm_insert_vmm_mapping(vcpu);
|
|
if (r)
|
|
goto fail;
|
|
|
|
vcpu->arch.launched = 0;
|
|
kvm_arch_vcpu_uninit(vcpu);
|
|
r = kvm_arch_vcpu_init(vcpu);
|
|
if (r)
|
|
goto fail;
|
|
|
|
kvm_purge_vmm_mapping(vcpu);
|
|
r = 0;
|
|
fail:
|
|
local_irq_restore(psr);
|
|
return r;
|
|
}
|
|
|
|
int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
|
|
struct kvm_mp_state *mp_state)
|
|
{
|
|
int r = 0;
|
|
|
|
vcpu_load(vcpu);
|
|
vcpu->arch.mp_state = mp_state->mp_state;
|
|
if (vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)
|
|
r = vcpu_reset(vcpu);
|
|
vcpu_put(vcpu);
|
|
return r;
|
|
}
|