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kvm_host.h

/*
 * kvm_host.h: used for kvm module, and hold ia64-specific sections.
 *
 * Copyright (C) 2007, Intel Corporation.
 *
 * Xiantao Zhang <xiantao.zhang@intel.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307 USA.
 *
 */

#ifndef __ASM_KVM_HOST_H
#define __ASM_KVM_HOST_H


#include <linux/types.h>
#include <linux/mm.h>
#include <linux/kvm.h>
#include <linux/kvm_para.h>
#include <linux/kvm_types.h>

#include <asm/pal.h>
#include <asm/sal.h>

#define KVM_MAX_VCPUS 4
#define KVM_MEMORY_SLOTS 32
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4

#define KVM_COALESCED_MMIO_PAGE_OFFSET 1

/* define exit reasons from vmm to kvm*/
#define EXIT_REASON_VM_PANIC        0
#define EXIT_REASON_MMIO_INSTRUCTION      1
#define EXIT_REASON_PAL_CALL        2
#define EXIT_REASON_SAL_CALL        3
#define EXIT_REASON_SWITCH_RR6            4
#define EXIT_REASON_VM_DESTROY            5
#define EXIT_REASON_EXTERNAL_INTERRUPT    6
#define EXIT_REASON_IPI             7
#define EXIT_REASON_PTC_G           8

/*Define vmm address space and vm data space.*/
#define KVM_VMM_SIZE (16UL<<20)
#define KVM_VMM_SHIFT 24
#define KVM_VMM_BASE 0xD000000000000000UL
#define VMM_SIZE (8UL<<20)

/*
 * Define vm_buffer, used by PAL Services, base address.
 * Note: vmbuffer is in the VMM-BLOCK, the size must be < 8M
 */
#define KVM_VM_BUFFER_BASE (KVM_VMM_BASE + VMM_SIZE)
#define KVM_VM_BUFFER_SIZE (8UL<<20)

/*Define Virtual machine data layout.*/
#define KVM_VM_DATA_SHIFT  24
#define KVM_VM_DATA_SIZE (1UL << KVM_VM_DATA_SHIFT)
#define KVM_VM_DATA_BASE (KVM_VMM_BASE + KVM_VMM_SIZE)


#define KVM_P2M_BASE    KVM_VM_DATA_BASE
#define KVM_P2M_OFS     0
#define KVM_P2M_SIZE    (8UL << 20)

#define KVM_VHPT_BASE   (KVM_P2M_BASE + KVM_P2M_SIZE)
#define KVM_VHPT_OFS    KVM_P2M_SIZE
#define KVM_VHPT_BLOCK_SIZE   (2UL << 20)
#define VHPT_SHIFT      18
#define VHPT_SIZE       (1UL << VHPT_SHIFT)
#define VHPT_NUM_ENTRIES (1<<(VHPT_SHIFT-5))

#define KVM_VTLB_BASE   (KVM_VHPT_BASE+KVM_VHPT_BLOCK_SIZE)
#define KVM_VTLB_OFS    (KVM_VHPT_OFS+KVM_VHPT_BLOCK_SIZE)
#define KVM_VTLB_BLOCK_SIZE   (1UL<<20)
#define VTLB_SHIFT      17
#define VTLB_SIZE       (1UL<<VTLB_SHIFT)
#define VTLB_NUM_ENTRIES (1<<(VTLB_SHIFT-5))

#define KVM_VPD_BASE   (KVM_VTLB_BASE+KVM_VTLB_BLOCK_SIZE)
#define KVM_VPD_OFS    (KVM_VTLB_OFS+KVM_VTLB_BLOCK_SIZE)
#define KVM_VPD_BLOCK_SIZE   (2UL<<20)
#define VPD_SHIFT       16
#define VPD_SIZE        (1UL<<VPD_SHIFT)

#define KVM_VCPU_BASE   (KVM_VPD_BASE+KVM_VPD_BLOCK_SIZE)
#define KVM_VCPU_OFS    (KVM_VPD_OFS+KVM_VPD_BLOCK_SIZE)
#define KVM_VCPU_BLOCK_SIZE   (2UL<<20)
#define VCPU_SHIFT 18
#define VCPU_SIZE (1UL<<VCPU_SHIFT)
#define MAX_VCPU_NUM KVM_VCPU_BLOCK_SIZE/VCPU_SIZE

#define KVM_VM_BASE     (KVM_VCPU_BASE+KVM_VCPU_BLOCK_SIZE)
#define KVM_VM_OFS      (KVM_VCPU_OFS+KVM_VCPU_BLOCK_SIZE)
#define KVM_VM_BLOCK_SIZE     (1UL<<19)

#define KVM_MEM_DIRTY_LOG_BASE (KVM_VM_BASE+KVM_VM_BLOCK_SIZE)
#define KVM_MEM_DIRTY_LOG_OFS  (KVM_VM_OFS+KVM_VM_BLOCK_SIZE)
#define KVM_MEM_DIRTY_LOG_SIZE (1UL<<19)

/* Get vpd, vhpt, tlb, vcpu, base*/
#define VPD_ADDR(n) (KVM_VPD_BASE+n*VPD_SIZE)
#define VHPT_ADDR(n) (KVM_VHPT_BASE+n*VHPT_SIZE)
#define VTLB_ADDR(n) (KVM_VTLB_BASE+n*VTLB_SIZE)
#define VCPU_ADDR(n) (KVM_VCPU_BASE+n*VCPU_SIZE)

/*IO section definitions*/
#define IOREQ_READ      1
#define IOREQ_WRITE     0

#define STATE_IOREQ_NONE        0
#define STATE_IOREQ_READY       1
#define STATE_IOREQ_INPROCESS   2
#define STATE_IORESP_READY      3

/*Guest Physical address layout.*/
#define GPFN_MEM        (0UL << 60) /* Guest pfn is normal mem */
#define GPFN_FRAME_BUFFER   (1UL << 60) /* VGA framebuffer */
#define GPFN_LOW_MMIO       (2UL << 60) /* Low MMIO range */
#define GPFN_PIB        (3UL << 60) /* PIB base */
#define GPFN_IOSAPIC        (4UL << 60) /* IOSAPIC base */
#define GPFN_LEGACY_IO      (5UL << 60) /* Legacy I/O base */
#define GPFN_GFW        (6UL << 60) /* Guest Firmware */
#define GPFN_PHYS_MMIO      (7UL << 60) /* Directed MMIO Range */

#define GPFN_IO_MASK        (7UL << 60) /* Guest pfn is I/O type */
#define GPFN_INV_MASK       (1UL << 63) /* Guest pfn is invalid */
#define INVALID_MFN       (~0UL)
#define MEM_G   (1UL << 30)
#define MEM_M   (1UL << 20)
#define MMIO_START       (3 * MEM_G)
#define MMIO_SIZE        (512 * MEM_M)
#define VGA_IO_START     0xA0000UL
#define VGA_IO_SIZE      0x20000
#define LEGACY_IO_START  (MMIO_START + MMIO_SIZE)
#define LEGACY_IO_SIZE   (64 * MEM_M)
#define IO_SAPIC_START   0xfec00000UL
#define IO_SAPIC_SIZE    0x100000
#define PIB_START 0xfee00000UL
#define PIB_SIZE 0x200000
#define GFW_START        (4 * MEM_G - 16 * MEM_M)
#define GFW_SIZE         (16 * MEM_M)

/*Deliver mode, defined for ioapic.c*/
#define dest_Fixed IOSAPIC_FIXED
#define dest_LowestPrio IOSAPIC_LOWEST_PRIORITY

#define NMI_VECTOR                  2
#define ExtINT_VECTOR               0
#define NULL_VECTOR                 (-1)
#define IA64_SPURIOUS_INT_VECTOR          0x0f

#define VCPU_LID(v) (((u64)(v)->vcpu_id) << 24)

/*
 *Delivery mode
 */
#define SAPIC_DELIV_SHIFT      8
#define SAPIC_FIXED            0x0
#define SAPIC_LOWEST_PRIORITY  0x1
#define SAPIC_PMI              0x2
#define SAPIC_NMI              0x4
#define SAPIC_INIT             0x5
#define SAPIC_EXTINT           0x7

/*
 * vcpu->requests bit members for arch
 */
#define KVM_REQ_PTC_G         32
#define KVM_REQ_RESUME        33

#define KVM_PAGES_PER_HPAGE   1

struct kvm;
struct kvm_vcpu;
struct kvm_guest_debug{
};

struct kvm_mmio_req {
      uint64_t addr;          /*  physical address          */
      uint64_t size;          /*  size in bytes       */
      uint64_t data;          /*  data (or paddr of data)     */
      uint8_t state:4;
      uint8_t dir:1;          /*  1=read, 0=write             */
};

/*Pal data struct */
struct kvm_pal_call{
      /*In area*/
      uint64_t gr28;
      uint64_t gr29;
      uint64_t gr30;
      uint64_t gr31;
      /*Out area*/
      struct ia64_pal_retval ret;
};

/* Sal data structure */
struct kvm_sal_call{
      /*In area*/
      uint64_t in0;
      uint64_t in1;
      uint64_t in2;
      uint64_t in3;
      uint64_t in4;
      uint64_t in5;
      uint64_t in6;
      uint64_t in7;
      struct sal_ret_values ret;
};

/*Guest change rr6*/
struct kvm_switch_rr6 {
      uint64_t old_rr;
      uint64_t new_rr;
};

union ia64_ipi_a{
      unsigned long val;
      struct {
            unsigned long rv  : 3;
            unsigned long ir  : 1;
            unsigned long eid : 8;
            unsigned long id  : 8;
            unsigned long ib_base : 44;
      };
};

union ia64_ipi_d {
      unsigned long val;
      struct {
            unsigned long vector : 8;
            unsigned long dm  : 3;
            unsigned long ig  : 53;
      };
};

/*ipi check exit data*/
struct kvm_ipi_data{
      union ia64_ipi_a addr;
      union ia64_ipi_d data;
};

/*global purge data*/
struct kvm_ptc_g {
      unsigned long vaddr;
      unsigned long rr;
      unsigned long ps;
      struct kvm_vcpu *vcpu;
};

/*Exit control data */
struct exit_ctl_data{
      uint32_t exit_reason;
      uint32_t vm_status;
      union {
            struct kvm_mmio_req     ioreq;
            struct kvm_pal_call     pal_data;
            struct kvm_sal_call     sal_data;
            struct kvm_switch_rr6   rr_data;
            struct kvm_ipi_data     ipi_data;
            struct kvm_ptc_g  ptc_g_data;
      } u;
};

union pte_flags {
      unsigned long val;
      struct {
            unsigned long p    :  1; /*0      */
            unsigned long      :  1; /* 1     */
            unsigned long ma   :  3; /* 2-4   */
            unsigned long a    :  1; /* 5     */
            unsigned long d    :  1; /* 6     */
            unsigned long pl   :  2; /* 7-8   */
            unsigned long ar   :  3; /* 9-11  */
            unsigned long ppn  : 38; /* 12-49 */
            unsigned long      :  2; /* 50-51 */
            unsigned long ed   :  1; /* 52    */
      };
};

union ia64_pta {
      unsigned long val;
      struct {
            unsigned long ve : 1;
            unsigned long reserved0 : 1;
            unsigned long size : 6;
            unsigned long vf : 1;
            unsigned long reserved1 : 6;
            unsigned long base : 49;
      };
};

struct thash_cb {
      /* THASH base information */
      struct thash_data *hash; /* hash table pointer */
      union ia64_pta          pta;
      int           num;
};

struct kvm_vcpu_stat {
};

struct kvm_vcpu_arch {
      int launched;
      int last_exit;
      int last_run_cpu;
      int vmm_tr_slot;
      int vm_tr_slot;

#define KVM_MP_STATE_RUNNABLE          0
#define KVM_MP_STATE_UNINITIALIZED     1
#define KVM_MP_STATE_INIT_RECEIVED     2
#define KVM_MP_STATE_HALTED            3
      int mp_state;

#define MAX_PTC_G_NUM               3
      int ptc_g_count;
      struct kvm_ptc_g ptc_g_data[MAX_PTC_G_NUM];

      /*halt timer to wake up sleepy vcpus*/
      struct hrtimer hlt_timer;
      long ht_active;

      struct kvm_lapic *apic;    /* kernel irqchip context */
      struct vpd *vpd;

      /* Exit data for vmm_transition*/
      struct exit_ctl_data exit_data;

      cpumask_t cache_coherent_map;

      unsigned long vmm_rr;
      unsigned long host_rr6;
      unsigned long psbits[8];
      unsigned long cr_iipa;
      unsigned long cr_isr;
      unsigned long vsa_base;
      unsigned long dirty_log_lock_pa;
      unsigned long __gp;
      /* TR and TC.  */
      struct thash_data itrs[NITRS];
      struct thash_data dtrs[NDTRS];
      /* Bit is set if there is a tr/tc for the region.  */
      unsigned char itr_regions;
      unsigned char dtr_regions;
      unsigned char tc_regions;
      /* purge all */
      unsigned long ptce_base;
      unsigned long ptce_count[2];
      unsigned long ptce_stride[2];
      /* itc/itm */
      unsigned long last_itc;
      long itc_offset;
      unsigned long itc_check;
      unsigned long timer_check;
      unsigned int timer_pending;
      unsigned int timer_fired;

      unsigned long vrr[8];
      unsigned long ibr[8];
      unsigned long dbr[8];
      unsigned long insvc[4];       /* Interrupt in service.  */
      unsigned long xtp;

      unsigned long metaphysical_rr0; /* from kvm_arch (so is pinned) */
      unsigned long metaphysical_rr4;     /* from kvm_arch (so is pinned) */
      unsigned long metaphysical_saved_rr0; /* from kvm_arch          */
      unsigned long metaphysical_saved_rr4; /* from kvm_arch          */
      unsigned long fp_psr;       /*used for lazy float register */
      unsigned long saved_gp;
      /*for phycial  emulation */
      int mode_flags;
      struct thash_cb vtlb;
      struct thash_cb vhpt;
      char irq_check;
      char irq_new_pending;

      unsigned long opcode;
      unsigned long cause;
      union context host;
      union context guest;
};

struct kvm_vm_stat {
      u64 remote_tlb_flush;
};

struct kvm_sal_data {
      unsigned long boot_ip;
      unsigned long boot_gp;
};

struct kvm_arch {
      unsigned long     vm_base;
      unsigned long     metaphysical_rr0;
      unsigned long     metaphysical_rr4;
      unsigned long     vmm_init_rr;
      unsigned long     vhpt_base;
      unsigned long     vtlb_base;
      unsigned long     vpd_base;
      spinlock_t dirty_log_lock;
      struct kvm_ioapic *vioapic;
      struct kvm_vm_stat stat;
      struct kvm_sal_data rdv_sal_data;

      struct list_head assigned_dev_head;
      struct dmar_domain *intel_iommu_domain;
      struct hlist_head irq_ack_notifier_list;

      unsigned long irq_sources_bitmap;
      unsigned long irq_states[KVM_IOAPIC_NUM_PINS];
};

union cpuid3_t {
      u64 value;
      struct {
            u64 number : 8;
            u64 revision : 8;
            u64 model : 8;
            u64 family : 8;
            u64 archrev : 8;
            u64 rv : 24;
      };
};

struct kvm_pt_regs {
      /* The following registers are saved by SAVE_MIN: */
      unsigned long b6;  /* scratch */
      unsigned long b7;  /* scratch */

      unsigned long ar_csd; /* used by cmp8xchg16 (scratch) */
      unsigned long ar_ssd; /* reserved for future use (scratch) */

      unsigned long r8;  /* scratch (return value register 0) */
      unsigned long r9;  /* scratch (return value register 1) */
      unsigned long r10; /* scratch (return value register 2) */
      unsigned long r11; /* scratch (return value register 3) */

      unsigned long cr_ipsr; /* interrupted task's psr */
      unsigned long cr_iip;  /* interrupted task's instruction pointer */
      unsigned long cr_ifs;  /* interrupted task's function state */

      unsigned long ar_unat; /* interrupted task's NaT register (preserved) */
      unsigned long ar_pfs;  /* prev function state  */
      unsigned long ar_rsc;  /* RSE configuration */
      /* The following two are valid only if cr_ipsr.cpl > 0: */
      unsigned long ar_rnat;  /* RSE NaT */
      unsigned long ar_bspstore; /* RSE bspstore */

      unsigned long pr;  /* 64 predicate registers (1 bit each) */
      unsigned long b0;  /* return pointer (bp) */
      unsigned long loadrs;  /* size of dirty partition << 16 */

      unsigned long r1;  /* the gp pointer */
      unsigned long r12; /* interrupted task's memory stack pointer */
      unsigned long r13; /* thread pointer */

      unsigned long ar_fpsr;  /* floating point status (preserved) */
      unsigned long r15;  /* scratch */

      /* The remaining registers are NOT saved for system calls.  */
      unsigned long r14;  /* scratch */
      unsigned long r2;  /* scratch */
      unsigned long r3;  /* scratch */
      unsigned long r16;  /* scratch */
      unsigned long r17;  /* scratch */
      unsigned long r18;  /* scratch */
      unsigned long r19;  /* scratch */
      unsigned long r20;  /* scratch */
      unsigned long r21;  /* scratch */
      unsigned long r22;  /* scratch */
      unsigned long r23;  /* scratch */
      unsigned long r24;  /* scratch */
      unsigned long r25;  /* scratch */
      unsigned long r26;  /* scratch */
      unsigned long r27;  /* scratch */
      unsigned long r28;  /* scratch */
      unsigned long r29;  /* scratch */
      unsigned long r30;  /* scratch */
      unsigned long r31;  /* scratch */
      unsigned long ar_ccv;  /* compare/exchange value (scratch) */

      /*
       * Floating point registers that the kernel considers scratch:
       */
      struct ia64_fpreg f6;  /* scratch */
      struct ia64_fpreg f7;  /* scratch */
      struct ia64_fpreg f8;  /* scratch */
      struct ia64_fpreg f9;  /* scratch */
      struct ia64_fpreg f10;  /* scratch */
      struct ia64_fpreg f11;  /* scratch */

      unsigned long r4;  /* preserved */
      unsigned long r5;  /* preserved */
      unsigned long r6;  /* preserved */
      unsigned long r7;  /* preserved */
      unsigned long eml_unat;    /* used for emulating instruction */
      unsigned long pad0;     /* alignment pad */
};

static inline struct kvm_pt_regs *vcpu_regs(struct kvm_vcpu *v)
{
      return (struct kvm_pt_regs *) ((unsigned long) v + IA64_STK_OFFSET) - 1;
}

typedef int kvm_vmm_entry(void);
typedef void kvm_tramp_entry(union context *host, union context *guest);

struct kvm_vmm_info{
      struct module     *module;
      kvm_vmm_entry     *vmm_entry;
      kvm_tramp_entry *tramp_entry;
      unsigned long     vmm_ivt;
};

int kvm_highest_pending_irq(struct kvm_vcpu *vcpu);
int kvm_emulate_halt(struct kvm_vcpu *vcpu);
int kvm_pal_emul(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
void kvm_sal_emul(struct kvm_vcpu *vcpu);

static inline void kvm_inject_nmi(struct kvm_vcpu *vcpu) {}

#endif

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