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linux_dsm_epyc7002/arch/powerpc/include/asm/kvm_host.h
Paul Mackerras b2b2f16508 KVM: PPC: Keep page physical addresses in per-slot arrays 
This allocates an array for each memory slot that is added to store
the physical addresses of the pages in the slot.  This array is
vmalloc'd and accessed in kvmppc_h_enter using real_vmalloc_addr().
This allows us to remove the ram_pginfo field from the kvm_arch
struct, and removes the 64GB guest RAM limit that we had.

We use the low-order bits of the array entries to store a flag
indicating that we have done get_page on the corresponding page,
and therefore need to call put_page when we are finished with the
page.  Currently this is set for all pages except those in our
special RMO regions.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-03-05 14:52:35 +02:00

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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* Copyright IBM Corp. 2007
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
#ifndef __POWERPC_KVM_HOST_H__
#define __POWERPC_KVM_HOST_H__
#include <linux/mutex.h>
#include <linux/hrtimer.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/kvm_types.h>
#include <linux/threads.h>
#include <linux/spinlock.h>
#include <linux/kvm_para.h>
#include <linux/list.h>
#include <linux/atomic.h>
#include <asm/kvm_asm.h>
#include <asm/processor.h>
#define KVM_MAX_VCPUS NR_CPUS
#define KVM_MAX_VCORES NR_CPUS
#define KVM_MEMORY_SLOTS 32
/* memory slots that does not exposed to userspace */
#define KVM_PRIVATE_MEM_SLOTS 4
#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
#ifdef CONFIG_KVM_MMIO
#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
#endif
/* We don't currently support large pages. */
#define KVM_HPAGE_GFN_SHIFT(x) 0
#define KVM_NR_PAGE_SIZES 1
#define KVM_PAGES_PER_HPAGE(x) (1UL<<31)
#define HPTEG_CACHE_NUM (1 << 15)
#define HPTEG_HASH_BITS_PTE 13
#define HPTEG_HASH_BITS_PTE_LONG 12
#define HPTEG_HASH_BITS_VPTE 13
#define HPTEG_HASH_BITS_VPTE_LONG 5
#define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE)
#define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG)
#define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE)
#define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG)
/* Physical Address Mask - allowed range of real mode RAM access */
#define KVM_PAM 0x0fffffffffffffffULL
struct kvm;
struct kvm_run;
struct kvm_vcpu;
struct lppaca;
struct slb_shadow;
struct dtl;
struct kvm_vm_stat {
u32 remote_tlb_flush;
};
struct kvm_vcpu_stat {
u32 sum_exits;
u32 mmio_exits;
u32 dcr_exits;
u32 signal_exits;
u32 light_exits;
/* Account for special types of light exits: */
u32 itlb_real_miss_exits;
u32 itlb_virt_miss_exits;
u32 dtlb_real_miss_exits;
u32 dtlb_virt_miss_exits;
u32 syscall_exits;
u32 isi_exits;
u32 dsi_exits;
u32 emulated_inst_exits;
u32 dec_exits;
u32 ext_intr_exits;
u32 halt_wakeup;
#ifdef CONFIG_PPC_BOOK3S
u32 pf_storage;
u32 pf_instruc;
u32 sp_storage;
u32 sp_instruc;
u32 queue_intr;
u32 ld;
u32 ld_slow;
u32 st;
u32 st_slow;
#endif
};
enum kvm_exit_types {
MMIO_EXITS,
DCR_EXITS,
SIGNAL_EXITS,
ITLB_REAL_MISS_EXITS,
ITLB_VIRT_MISS_EXITS,
DTLB_REAL_MISS_EXITS,
DTLB_VIRT_MISS_EXITS,
SYSCALL_EXITS,
ISI_EXITS,
DSI_EXITS,
EMULATED_INST_EXITS,
EMULATED_MTMSRWE_EXITS,
EMULATED_WRTEE_EXITS,
EMULATED_MTSPR_EXITS,
EMULATED_MFSPR_EXITS,
EMULATED_MTMSR_EXITS,
EMULATED_MFMSR_EXITS,
EMULATED_TLBSX_EXITS,
EMULATED_TLBWE_EXITS,
EMULATED_RFI_EXITS,
DEC_EXITS,
EXT_INTR_EXITS,
HALT_WAKEUP,
USR_PR_INST,
FP_UNAVAIL,
DEBUG_EXITS,
TIMEINGUEST,
__NUMBER_OF_KVM_EXIT_TYPES
};
/* allow access to big endian 32bit upper/lower parts and 64bit var */
struct kvmppc_exit_timing {
union {
u64 tv64;
struct {
u32 tbu, tbl;
} tv32;
};
};
struct kvmppc_pginfo {
unsigned long pfn;
atomic_t refcnt;
};
struct kvmppc_spapr_tce_table {
struct list_head list;
struct kvm *kvm;
u64 liobn;
u32 window_size;
struct page *pages[0];
};
struct kvmppc_rma_info {
void *base_virt;
unsigned long base_pfn;
unsigned long npages;
struct list_head list;
atomic_t use_count;
};
/*
* The reverse mapping array has one entry for each HPTE,
* which stores the guest's view of the second word of the HPTE
* (including the guest physical address of the mapping).
*/
struct revmap_entry {
unsigned long guest_rpte;
};
/* Low-order bits in kvm->arch.slot_phys[][] */
#define KVMPPC_GOT_PAGE 0x80
struct kvm_arch {
#ifdef CONFIG_KVM_BOOK3S_64_HV
unsigned long hpt_virt;
struct revmap_entry *revmap;
unsigned long ram_psize;
unsigned long ram_porder;
unsigned int lpid;
unsigned int host_lpid;
unsigned long host_lpcr;
unsigned long sdr1;
unsigned long host_sdr1;
int tlbie_lock;
unsigned long lpcr;
unsigned long rmor;
struct kvmppc_rma_info *rma;
struct list_head spapr_tce_tables;
unsigned long *slot_phys[KVM_MEM_SLOTS_NUM];
int slot_npages[KVM_MEM_SLOTS_NUM];
unsigned short last_vcpu[NR_CPUS];
struct kvmppc_vcore *vcores[KVM_MAX_VCORES];
#endif /* CONFIG_KVM_BOOK3S_64_HV */
};
/*
* Struct for a virtual core.
* Note: entry_exit_count combines an entry count in the bottom 8 bits
* and an exit count in the next 8 bits. This is so that we can
* atomically increment the entry count iff the exit count is 0
* without taking the lock.
*/
struct kvmppc_vcore {
int n_runnable;
int n_busy;
int num_threads;
int entry_exit_count;
int n_woken;
int nap_count;
int napping_threads;
u16 pcpu;
u8 vcore_state;
u8 in_guest;
struct list_head runnable_threads;
spinlock_t lock;
wait_queue_head_t wq;
};
#define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff)
#define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8)
/* Values for vcore_state */
#define VCORE_INACTIVE 0
#define VCORE_RUNNING 1
#define VCORE_EXITING 2
#define VCORE_SLEEPING 3
struct kvmppc_pte {
ulong eaddr;
u64 vpage;
ulong raddr;
bool may_read : 1;
bool may_write : 1;
bool may_execute : 1;
};
struct kvmppc_mmu {
/* book3s_64 only */
void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs);
u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr);
u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr);
void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr);
void (*slbia)(struct kvm_vcpu *vcpu);
/* book3s */
void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value);
u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum);
int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data);
void (*reset_msr)(struct kvm_vcpu *vcpu);
void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large);
int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid);
u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data);
bool (*is_dcbz32)(struct kvm_vcpu *vcpu);
};
struct kvmppc_slb {
u64 esid;
u64 vsid;
u64 orige;
u64 origv;
bool valid : 1;
bool Ks : 1;
bool Kp : 1;
bool nx : 1;
bool large : 1; /* PTEs are 16MB */
bool tb : 1; /* 1TB segment */
bool class : 1;
};
struct kvm_vcpu_arch {
ulong host_stack;
u32 host_pid;
#ifdef CONFIG_PPC_BOOK3S
struct kvmppc_slb slb[64];
int slb_max; /* 1 + index of last valid entry in slb[] */
int slb_nr; /* total number of entries in SLB */
struct kvmppc_mmu mmu;
#endif
ulong gpr[32];
u64 fpr[32];
u64 fpscr;
#ifdef CONFIG_SPE
ulong evr[32];
ulong spefscr;
ulong host_spefscr;
u64 acc;
#endif
#ifdef CONFIG_ALTIVEC
vector128 vr[32];
vector128 vscr;
#endif
#ifdef CONFIG_VSX
u64 vsr[64];
#endif
#ifdef CONFIG_PPC_BOOK3S
/* For Gekko paired singles */
u32 qpr[32];
#endif
ulong pc;
ulong ctr;
ulong lr;
ulong xer;
u32 cr;
#ifdef CONFIG_PPC_BOOK3S
ulong hflags;
ulong guest_owned_ext;
ulong purr;
ulong spurr;
ulong dscr;
ulong amr;
ulong uamor;
u32 ctrl;
ulong dabr;
#endif
u32 vrsave; /* also USPRG0 */
u32 mmucr;
ulong shadow_msr;
ulong csrr0;
ulong csrr1;
ulong dsrr0;
ulong dsrr1;
ulong mcsrr0;
ulong mcsrr1;
ulong mcsr;
u32 dec;
u32 decar;
u32 tbl;
u32 tbu;
u32 tcr;
ulong tsr; /* we need to perform set/clr_bits() which requires ulong */
u32 ivor[64];
ulong ivpr;
u32 pvr;
u32 shadow_pid;
u32 shadow_pid1;
u32 pid;
u32 swap_pid;
u32 ccr0;
u32 ccr1;
u32 dbcr0;
u32 dbcr1;
u32 dbsr;
u64 mmcr[3];
u32 pmc[8];
#ifdef CONFIG_KVM_EXIT_TIMING
struct mutex exit_timing_lock;
struct kvmppc_exit_timing timing_exit;
struct kvmppc_exit_timing timing_last_enter;
u32 last_exit_type;
u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES];
u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES];
u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES];
u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES];
u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES];
u64 timing_last_exit;
struct dentry *debugfs_exit_timing;
#endif
#ifdef CONFIG_PPC_BOOK3S
ulong fault_dar;
u32 fault_dsisr;
#endif
#ifdef CONFIG_BOOKE
ulong fault_dear;
ulong fault_esr;
ulong queued_dear;
ulong queued_esr;
#endif
gpa_t paddr_accessed;
u8 io_gpr; /* GPR used as IO source/target */
u8 mmio_is_bigendian;
u8 mmio_sign_extend;
u8 dcr_needed;
u8 dcr_is_write;
u8 osi_needed;
u8 osi_enabled;
u8 papr_enabled;
u8 sane;
u8 cpu_type;
u8 hcall_needed;
u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */
struct hrtimer dec_timer;
struct tasklet_struct tasklet;
u64 dec_jiffies;
u64 dec_expires;
unsigned long pending_exceptions;
u16 last_cpu;
u8 ceded;
u8 prodded;
u32 last_inst;
struct lppaca *vpa;
struct slb_shadow *slb_shadow;
struct dtl *dtl;
struct dtl *dtl_end;
wait_queue_head_t *wqp;
struct kvmppc_vcore *vcore;
int ret;
int trap;
int state;
int ptid;
bool timer_running;
wait_queue_head_t cpu_run;
struct kvm_vcpu_arch_shared *shared;
unsigned long magic_page_pa; /* phys addr to map the magic page to */
unsigned long magic_page_ea; /* effect. addr to map the magic page to */
#ifdef CONFIG_KVM_BOOK3S_64_HV
struct kvm_vcpu_arch_shared shregs;
struct list_head run_list;
struct task_struct *run_task;
struct kvm_run *kvm_run;
#endif
};
/* Values for vcpu->arch.state */
#define KVMPPC_VCPU_STOPPED 0
#define KVMPPC_VCPU_BUSY_IN_HOST 1
#define KVMPPC_VCPU_RUNNABLE 2
#endif /* __POWERPC_KVM_HOST_H__ */
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