/* SPDX-License-Identifier: GPL-2.0-only */
/*
*
* Copyright IBM Corp. 2008
*
* Authors: Hollis Blanchard <hollisb@us.ibm.com>
*/
#ifndef __POWERPC_KVM_PPC_H__
#define __POWERPC_KVM_PPC_H__
/* This file exists just so we can dereference kvm_vcpu, avoiding nested header
* dependencies. */
#include <linux/mutex.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/kvm_types.h>
#include <linux/kvm_host.h>
#include <linux/bug.h>
#ifdef CONFIG_PPC_BOOK3S
#include <asm/kvm_book3s.h>
#else
#include <asm/kvm_booke.h>
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
#include <asm/paca.h>
#include <asm/xive.h>
#include <asm/cpu_has_feature.h>
#endif
#include <asm/inst.h>
/*
* KVMPPC_INST_SW_BREAKPOINT is debug Instruction
* for supporting software breakpoint.
*/
#define KVMPPC_INST_SW_BREAKPOINT 0x00dddd00
enum emulation_result {
EMULATE_DONE, /* no further processing */
EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */
EMULATE_FAIL, /* can't emulate this instruction */
EMULATE_AGAIN, /* something went wrong. go again */
EMULATE_EXIT_USER, /* emulation requires exit to user-space */
};
enum instruction_fetch_type {
INST_GENERIC,
INST_SC, /* system call */
};
enum xlate_instdata {
XLATE_INST, /* translate instruction address */
XLATE_DATA /* translate data address */
};
enum xlate_readwrite {
XLATE_READ, /* check for read permissions */
XLATE_WRITE /* check for write permissions */
};
extern int kvmppc_vcpu_run(struct kvm_vcpu *vcpu);
extern int __kvmppc_vcpu_run(struct kvm_vcpu *vcpu);
extern void kvmppc_handler_highmem(void);
extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
extern int kvmppc_handle_load(struct kvm_vcpu *vcpu,
unsigned int rt, unsigned int bytes,
int is_default_endian);
extern int kvmppc_handle_loads(struct kvm_vcpu *vcpu,
unsigned int rt, unsigned int bytes,
int is_default_endian);
extern int kvmppc_handle_vsx_load(struct kvm_vcpu *vcpu,
unsigned int rt, unsigned int bytes,
int is_default_endian, int mmio_sign_extend);
extern int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
unsigned int rt, unsigned int bytes, int is_default_endian);
extern int kvmppc_handle_vmx_store(struct kvm_vcpu *vcpu,
unsigned int rs, unsigned int bytes, int is_default_endian);
extern int kvmppc_handle_store(struct kvm_vcpu *vcpu,
u64 val, unsigned int bytes,
int is_default_endian);
extern int kvmppc_handle_vsx_store(struct kvm_vcpu *vcpu,
int rs, unsigned int bytes,
int is_default_endian);
extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
enum instruction_fetch_type type,
unsigned long *inst);
extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
bool data);
extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
bool data);
extern int kvmppc_emulate_instruction(struct kvm_vcpu *vcpu);
extern int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu);
extern int kvmppc_emulate_mmio(struct kvm_vcpu *vcpu);
extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
extern void kvmppc_decrementer_func(struct kvm_vcpu *vcpu);
extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
/* Core-specific hooks */
extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
unsigned int gtlb_idx);
extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
gva_t eaddr);
extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
extern int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr,
enum xlate_instdata xlid, enum xlate_readwrite xlrw,
struct kvmppc_pte *pte);
extern int kvmppc_core_vcpu_create(struct kvm_vcpu *vcpu);
extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
struct kvm_translation *tr);
extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_machine_check(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_queue_syscall(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
struct kvm_interrupt *irq);
extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu,
ulong dear_flags,
ulong esr_flags);
extern void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
ulong srr1_flags,
ulong dar,
ulong dsisr);
extern void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu);
extern void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
ulong srr1_flags);
extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
extern int kvmppc_booke_init(void);
extern void kvmppc_booke_exit(void);
extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
extern int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order);
extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
extern int kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
extern void kvmppc_rmap_reset(struct kvm *kvm);
extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
struct kvm_memory_slot *memslot, unsigned long porder);
extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
extern long kvm_spapr_tce_attach_iommu_group(struct kvm *kvm, int tablefd,
struct iommu_group *grp);
extern void kvm_spapr_tce_release_iommu_group(struct kvm *kvm,
struct iommu_group *grp);
extern int kvmppc_switch_mmu_to_hpt(struct kvm *kvm);
extern int kvmppc_switch_mmu_to_radix(struct kvm *kvm);
extern void kvmppc_setup_partition_table(struct kvm *kvm);
extern int kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
struct kvm_create_spapr_tce_64 *args);
#define kvmppc_ioba_validate(stt, ioba, npages) \
(iommu_tce_check_ioba((stt)->page_shift, (stt)->offset, \
(stt)->size, (ioba), (npages)) ? \
H_PARAMETER : H_SUCCESS)
extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba, unsigned long tce);
extern long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_list, unsigned long npages);
extern long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_value, unsigned long npages);
extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba);
extern struct page *kvm_alloc_hpt_cma(unsigned long nr_pages);
extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
extern int kvmppc_core_init_vm(struct kvm *kvm);
extern void kvmppc_core_destroy_vm(struct kvm *kvm);
extern void kvmppc_core_free_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot);
extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
const struct kvm_memory_slot *old,
struct kvm_memory_slot *new,
enum kvm_mr_change change);
extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
struct kvm_memory_slot *old,
const struct kvm_memory_slot *new,
enum kvm_mr_change change);
extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
struct kvm_ppc_smmu_info *info);
extern void kvmppc_core_flush_memslot(struct kvm *kvm,
struct kvm_memory_slot *memslot);
extern int kvmppc_bookehv_init(void);
extern void kvmppc_bookehv_exit(void);
extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
extern int kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
struct kvm_ppc_resize_hpt *rhpt);
extern int kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
struct kvm_ppc_resize_hpt *rhpt);
int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
u32 priority);
extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
u32 *priority);
extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);
void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu);
void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu);
union kvmppc_one_reg {
u32 wval;
u64 dval;
vector128 vval;
u64 vsxval[2];
u32 vsx32val[4];
u16 vsx16val[8];
u8 vsx8val[16];
struct {
u64 addr;
u64 length;
} vpaval;
u64 xive_timaval[2];
};
struct kvmppc_ops {
struct module *owner;
int (*get_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int (*set_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int (*get_one_reg)(struct kvm_vcpu *vcpu, u64 id,
union kvmppc_one_reg *val);
int (*set_one_reg)(struct kvm_vcpu *vcpu, u64 id,
union kvmppc_one_reg *val);
void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
void (*vcpu_put)(struct kvm_vcpu *vcpu);
void (*inject_interrupt)(struct kvm_vcpu *vcpu, int vec, u64 srr1_flags);
void (*set_msr)(struct kvm_vcpu *vcpu, u64 msr);
int (*vcpu_run)(struct kvm_vcpu *vcpu);
int (*vcpu_create)(struct kvm_vcpu *vcpu);
void (*vcpu_free)(struct kvm_vcpu *vcpu);
int (*check_requests)(struct kvm_vcpu *vcpu);
int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log);
void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot);
int (*prepare_memory_region)(struct kvm *kvm,
const struct kvm_memory_slot *old,
struct kvm_memory_slot *new,
enum kvm_mr_change change);
void (*commit_memory_region)(struct kvm *kvm,
struct kvm_memory_slot *old,
const struct kvm_memory_slot *new,
enum kvm_mr_change change);
bool (*unmap_gfn_range)(struct kvm *kvm, struct kvm_gfn_range *range);
bool (*age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
bool (*test_age_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
bool (*set_spte_gfn)(struct kvm *kvm, struct kvm_gfn_range *range);
void (*free_memslot)(struct kvm_memory_slot *slot);
int (*init_vm)(struct kvm *kvm);
void (*destroy_vm)(struct kvm *kvm);
int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);
int (*emulate_op)(struct kvm_vcpu *vcpu,
unsigned int inst, int *advance);
int (*emulate_mtspr)(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
int (*emulate_mfspr)(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu);
int (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl,
unsigned long arg);
int (*hcall_implemented)(unsigned long hcall);
int (*irq_bypass_add_producer)(struct irq_bypass_consumer *,
struct irq_bypass_producer *);
void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
struct irq_bypass_producer *);
int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
int (*set_smt_mode)(struct kvm *kvm, unsigned long mode,
unsigned long flags);
void (*giveup_ext)(struct kvm_vcpu *vcpu, ulong msr);
int (*enable_nested)(struct kvm *kvm);
int (*load_from_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size);
int (*store_to_eaddr)(struct kvm_vcpu *vcpu, ulong *eaddr, void *ptr,
int size);
int (*enable_svm)(struct kvm *kvm);
int (*svm_off)(struct kvm *kvm);
int (*enable_dawr1)(struct kvm *kvm);
bool (*hash_v3_possible)(void);
int (*create_vm_debugfs)(struct kvm *kvm);
int (*create_vcpu_debugfs)(struct kvm_vcpu *vcpu, struct dentry *debugfs_dentry);
};
extern struct kvmppc_ops *kvmppc_hv_ops;
extern struct kvmppc_ops *kvmppc_pr_ops;
static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu,
enum instruction_fetch_type type, ppc_inst_t *inst)
{
int ret = EMULATE_DONE;
u32 fetched_inst;
/* Load the instruction manually if it failed to do so in the
* exit path */
if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst);
/* Write fetch_failed unswapped if the fetch failed */
if (ret != EMULATE_DONE) {
*inst = ppc_inst(KVM_INST_FETCH_FAILED);
return ret;
}
#ifdef CONFIG_PPC64
/* Is this a prefixed instruction? */
if ((vcpu->arch.last_inst >> 32) != 0) {
u32 prefix = vcpu->arch.last_inst >> 32;
u32 suffix = vcpu->arch.last_inst;
if (kvmppc_need_byteswap(vcpu)) {
prefix = swab32(prefix);
suffix = swab32(suffix);
}
*inst = ppc_inst_prefix(prefix, suffix);
return EMULATE_DONE;
}
#endif
fetched_inst = kvmppc_need_byteswap(vcpu) ?
swab32(vcpu->arch.last_inst) :
vcpu->arch.last_inst;
*inst = ppc_inst(fetched_inst);
return EMULATE_DONE;
}
static inline bool is_kvmppc_hv_enabled(struct kvm *kvm)
{
return kvm->arch.kvm_ops == kvmppc_hv_ops;
}
extern int kvmppc_hwrng_present(void);
/*
* Cuts out inst bits with ordering according to spec.
* That means the leftmost bit is zero. All given bits are included.
*/
static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
{
u32 r;
u32 mask;
BUG_ON(msb > lsb);
mask = (1 << (lsb - msb + 1)) - 1;
r = (inst >> (63 - lsb)) & mask;
return r;
}
/*
* Replaces inst bits with ordering according to spec.
*/
static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
{
u32 r;
u32 mask;
BUG_ON(msb > lsb);
mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
return r;
}
#define one_reg_size(id) \
(1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
#define get_reg_val(id, reg) ({ \
union kvmppc_one_reg __u; \
switch (one_reg_size(id)) { \
case 4: __u.wval = (reg); break; \
case 8: __u.dval = (reg); break; \
default: BUG(); \
} \
__u; \
})
#define set_reg_val(id, val) ({ \
u64 __v; \
switch (one_reg_size(id)) { \
case 4: __v = (val).wval; break; \
case 8: __v = (val).dval; break; \
default: BUG(); \
} \
__v; \
})
int kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
struct openpic;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
extern void kvm_cma_reserve(void) __init;
static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{
paca_ptrs[cpu]->kvm_hstate.xics_phys = (void __iomem *)addr;
}
static inline void kvmppc_set_xive_tima(int cpu,
unsigned long phys_addr,
void __iomem *virt_addr)
{
paca_ptrs[cpu]->kvm_hstate.xive_tima_phys = (void __iomem *)phys_addr;
paca_ptrs[cpu]->kvm_hstate.xive_tima_virt = virt_addr;
}
static inline u32 kvmppc_get_xics_latch(void)
{
u32 xirr;
xirr = get_paca()->kvm_hstate.saved_xirr;
get_paca()->kvm_hstate.saved_xirr = 0;
return xirr;
}
/*
* To avoid the need to unnecessarily exit fully to the host kernel, an IPI to
* a CPU thread that's running/napping inside of a guest is by default regarded
* as a request to wake the CPU (if needed) and continue execution within the
* guest, potentially to process new state like externally-generated
* interrupts or IPIs sent from within the guest itself (e.g. H_PROD/H_IPI).
*
* To force an exit to the host kernel, kvmppc_set_host_ipi() must be called
* prior to issuing the IPI to set the corresponding 'host_ipi' flag in the
* target CPU's PACA. To avoid unnecessary exits to the host, this flag should
* be immediately cleared via kvmppc_clear_host_ipi() by the IPI handler on
* the receiving side prior to processing the IPI work.
*
* NOTE:
*
* We currently issue an smp_mb() at the beginning of kvmppc_set_host_ipi().
* This is to guard against sequences such as the following:
*
* CPU
* X: smp_muxed_ipi_set_message():
* X: smp_mb()
* X: message[RESCHEDULE] = 1
* X: doorbell_global_ipi(42):
* X: kvmppc_set_host_ipi(42)
* X: ppc_msgsnd_sync()/smp_mb()
* X: ppc_msgsnd() -> 42
* 42: doorbell_exception(): // from CPU X
* 42: ppc_msgsync()
* 105: smp_muxed_ipi_set_message():
* 105: smb_mb()
* // STORE DEFERRED DUE TO RE-ORDERING
* --105: message[CALL_FUNCTION] = 1
* | 105: doorbell_global_ipi(42):
* | 105: kvmppc_set_host_ipi(42)
* | 42: kvmppc_clear_host_ipi(42)
* | 42: smp_ipi_demux_relaxed()
* | 42: // returns to executing guest
* | // RE-ORDERED STORE COMPLETES
* ->105: message[CALL_FUNCTION] = 1
* 105: ppc_msgsnd_sync()/smp_mb()
* 105: ppc_msgsnd() -> 42
* 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
* 105: // hangs waiting on 42 to process messages/call_single_queue
*
* We also issue an smp_mb() at the end of kvmppc_clear_host_ipi(). This is
* to guard against sequences such as the following (as well as to create
* a read-side pairing with the barrier in kvmppc_set_host_ipi()):
*
* CPU
* X: smp_muxed_ipi_set_message():
* X: smp_mb()
* X: message[RESCHEDULE] = 1
* X: doorbell_global_ipi(42):
* X: kvmppc_set_host_ipi(42)
* X: ppc_msgsnd_sync()/smp_mb()
* X: ppc_msgsnd() -> 42
* 42: doorbell_exception(): // from CPU X
* 42: ppc_msgsync()
* // STORE DEFERRED DUE TO RE-ORDERING
* -- 42: kvmppc_clear_host_ipi(42)
* | 42: smp_ipi_demux_relaxed()
* | 105: smp_muxed_ipi_set_message():
* | 105: smb_mb()
* | 105: message[CALL_FUNCTION] = 1
* | 105: doorbell_global_ipi(42):
* | 105: kvmppc_set_host_ipi(42)
* | // RE-ORDERED STORE COMPLETES
* -> 42: kvmppc_clear_host_ipi(42)
* 42: // returns to executing guest
* 105: ppc_msgsnd_sync()/smp_mb()
* 105: ppc_msgsnd() -> 42
* 42: local_paca->kvm_hstate.host_ipi == 0 // IPI ignored
* 105: // hangs waiting on 42 to process messages/call_single_queue
*/
static inline void kvmppc_set_host_ipi(int cpu)
{
/*
* order stores of IPI messages vs. setting of host_ipi flag
*
* pairs with the barrier in kvmppc_clear_host_ipi()
*/
smp_mb();
WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 1);
}
static inline void kvmppc_clear_host_ipi(int cpu)
{
WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 0);
/*
* order clearing of host_ipi flag vs. processing of IPI messages
*
* pairs with the barrier in kvmppc_set_host_ipi()
*/
smp_mb();
}
static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
{
vcpu->kvm->arch.kvm_ops->fast_vcpu_kick(vcpu);
}
extern void kvm_hv_vm_activated(void);
extern void kvm_hv_vm_deactivated(void);
extern bool kvm_hv_mode_active(void);
extern void kvmppc_check_need_tlb_flush(struct kvm *kvm, int pcpu);
#else
static inline void __init kvm_cma_reserve(void)
{}
static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
{}
static inline void kvmppc_set_xive_tima(int cpu,
unsigned long phys_addr,
void __iomem *virt_addr)
{}
static inline u32 kvmppc_get_xics_latch(void)
{
return 0;
}
static inline void kvmppc_set_host_ipi(int cpu)
{}
static inline void kvmppc_clear_host_ipi(int cpu)
{}
static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
{
kvm_vcpu_kick(vcpu);
}
static inline bool kvm_hv_mode_active(void) { return false; }
#endif
#ifdef CONFIG_PPC_PSERIES
static inline bool kvmhv_on_pseries(void)
{
return !cpu_has_feature(CPU_FTR_HVMODE);
}
#else
static inline bool kvmhv_on_pseries(void)
{
return false;
}
#endif
#ifdef CONFIG_KVM_XICS
static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
{
return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
}
static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
struct kvm *kvm)
{
if (kvm && kvm_irq_bypass)
return kvm->arch.pimap;
return NULL;
}
extern void kvmppc_alloc_host_rm_ops(void);
extern void kvmppc_free_host_rm_ops(void);
extern void kvmppc_free_pimap(struct kvm *kvm);
extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
extern int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req);
extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu);
extern void kvmppc_xics_ipi_action(void);
extern void kvmppc_xics_set_mapped(struct kvm *kvm, unsigned long guest_irq,
unsigned long host_irq);
extern void kvmppc_xics_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
unsigned long host_irq);
extern long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu, __be32 xirr,
struct kvmppc_irq_map *irq_map,
struct kvmppc_passthru_irqmap *pimap,
bool *again);
extern int kvmppc_xics_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
int level, bool line_status);
extern int h_ipi_redirect;
#else
static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
struct kvm *kvm)
{ return NULL; }
static inline void kvmppc_alloc_host_rm_ops(void) {}
static inline void kvmppc_free_host_rm_ops(void) {}
static inline void kvmppc_free_pimap(struct kvm *kvm) {}
static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
{ return 0; }
static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
{ return 0; }
static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
{ return 0; }
static inline int kvmppc_xive_xics_hcall(struct kvm_vcpu *vcpu, u32 req)
{ return 0; }
#endif
#ifdef CONFIG_KVM_XIVE
/*
* Below the first "xive" is the "eXternal Interrupt Virtualization Engine"
* ie. P9 new interrupt controller, while the second "xive" is the legacy
* "eXternal Interrupt Vector Entry" which is the configuration of an
* interrupt on the "xics" interrupt controller on P8 and earlier. Those
* two function consume or produce a legacy "XIVE" state from the
* new "XIVE" interrupt controller.
*/
extern int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
u32 priority);
extern int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
u32 *priority);
extern int kvmppc_xive_int_on(struct kvm *kvm, u32 irq);
extern int kvmppc_xive_int_off(struct kvm *kvm, u32 irq);
extern int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu);
extern void kvmppc_xive_cleanup_vcpu(struct kvm_vcpu *vcpu);
extern int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
unsigned long host_irq);
extern int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
unsigned long host_irq);
extern u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu);
extern int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
extern int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
int level, bool line_status);
extern void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu);
extern void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu);
extern bool kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu);
static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
{
return vcpu->arch.irq_type == KVMPPC_IRQ_XIVE;
}
extern int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu);
extern void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu);
extern int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
union kvmppc_one_reg *val);
extern int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
union kvmppc_one_reg *val);
extern bool kvmppc_xive_native_supported(void);
#else
static inline int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
u32 priority) { return -1; }
static inline int kvmppc_xive_get_xive(struct kvm *kvm, u32 irq, u32 *server,
u32 *priority) { return -1; }
static inline int kvmppc_xive_int_on(struct kvm *kvm, u32 irq) { return -1; }
static inline int kvmppc_xive_int_off(struct kvm *kvm, u32 irq) { return -1; }
static inline int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
static inline void kvmppc_xive_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
static inline int kvmppc_xive_set_mapped(struct kvm *kvm, unsigned long guest_irq,
struct irq_desc *host_desc) { return -ENODEV; }
static inline int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
struct irq_desc *host_desc) { return -ENODEV; }
static inline u64 kvmppc_xive_get_icp(struct kvm_vcpu *vcpu) { return 0; }
static inline int kvmppc_xive_set_icp(struct kvm_vcpu *vcpu, u64 icpval) { return -ENOENT; }
static inline int kvmppc_xive_set_irq(struct kvm *kvm, int irq_source_id, u32 irq,
int level, bool line_status) { return -ENODEV; }
static inline void kvmppc_xive_push_vcpu(struct kvm_vcpu *vcpu) { }
static inline void kvmppc_xive_pull_vcpu(struct kvm_vcpu *vcpu) { }
static inline bool kvmppc_xive_rearm_escalation(struct kvm_vcpu *vcpu) { return true; }
static inline int kvmppc_xive_enabled(struct kvm_vcpu *vcpu)
{ return 0; }
static inline int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu) { return -EBUSY; }
static inline void kvmppc_xive_native_cleanup_vcpu(struct kvm_vcpu *vcpu) { }
static inline int kvmppc_xive_native_get_vp(struct kvm_vcpu *vcpu,
union kvmppc_one_reg *val)
{ return 0; }
static inline int kvmppc_xive_native_set_vp(struct kvm_vcpu *vcpu,
union kvmppc_one_reg *val)
{ return -ENOENT; }
#endif /* CONFIG_KVM_XIVE */
#if defined(CONFIG_PPC_POWERNV) && defined(CONFIG_KVM_BOOK3S_64_HANDLER)
static inline bool xics_on_xive(void)
{
return xive_enabled() && cpu_has_feature(CPU_FTR_HVMODE);
}
#else
static inline bool xics_on_xive(void)
{
return false;
}
#endif
/*
* Prototypes for functions called only from assembler code.
* Having prototypes reduces sparse errors.
*/
long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
unsigned long ioba, unsigned long tce);
long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_list, unsigned long npages);
long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
unsigned long liobn, unsigned long ioba,
unsigned long tce_value, unsigned long npages);
long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
unsigned int yield_count);
long kvmppc_rm_h_random(struct kvm_vcpu *vcpu);
void kvmhv_commence_exit(int trap);
void kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
void kvmppc_subcore_enter_guest(void);
void kvmppc_subcore_exit_guest(void);
long kvmppc_realmode_hmi_handler(void);
long kvmppc_p9_realmode_hmi_handler(struct kvm_vcpu *vcpu);
long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
long pte_index, unsigned long pteh, unsigned long ptel);
long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index, unsigned long avpn);
long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu);
long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index, unsigned long avpn);
long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index);
long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index);
long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long pte_index);
long kvmppc_rm_h_page_init(struct kvm_vcpu *vcpu, unsigned long flags,
unsigned long dest, unsigned long src);
long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
unsigned long slb_v, unsigned int status, bool data);
void kvmppc_guest_entry_inject_int(struct kvm_vcpu *vcpu);
/*
* Host-side operations we want to set up while running in real
* mode in the guest operating on the xics.
* Currently only VCPU wakeup is supported.
*/
union kvmppc_rm_state {
unsigned long raw;
struct {
u32 in_host;
u32 rm_action;
};
};
struct kvmppc_host_rm_core {
union kvmppc_rm_state rm_state;
void *rm_data;
char pad[112];
};
struct kvmppc_host_rm_ops {
struct kvmppc_host_rm_core *rm_core;
void (*vcpu_kick)(struct kvm_vcpu *vcpu);
};
extern struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;
static inline unsigned long kvmppc_get_epr(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_KVM_BOOKE_HV
return mfspr(SPRN_GEPR);
#elif defined(CONFIG_BOOKE)
return vcpu->arch.epr;
#else
return 0;
#endif
}
static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
{
#ifdef CONFIG_KVM_BOOKE_HV
mtspr(SPRN_GEPR, epr);
#elif defined(CONFIG_BOOKE)
vcpu->arch.epr = epr;
#endif
}
#ifdef CONFIG_KVM_MPIC
void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
u32 cpu);
void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);
#else
static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
{
}
static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
struct kvm_vcpu *vcpu, u32 cpu)
{
return -EINVAL;
}
static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
struct kvm_vcpu *vcpu)
{
}
#endif /* CONFIG_KVM_MPIC */
int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
struct kvm_config_tlb *cfg);
int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
struct kvm_dirty_tlb *cfg);
long kvmppc_alloc_lpid(void);
void kvmppc_free_lpid(long lpid);
void kvmppc_init_lpid(unsigned long nr_lpids);
static inline void kvmppc_mmu_flush_icache(kvm_pfn_t pfn)
{
struct folio *folio;
/*
* We can only access pages that the kernel maps
* as memory. Bail out for unmapped ones.
*/
if (!pfn_valid(pfn))
return;
/* Clear i-cache for new pages */
folio = page_folio(pfn_to_page(pfn));
if (!test_bit(PG_dcache_clean, &folio->flags)) {
flush_dcache_icache_folio(folio);
set_bit(PG_dcache_clean, &folio->flags);
}
}
/*
* Shared struct helpers. The shared struct can be little or big endian,
* depending on the guest endianness. So expose helpers to all of them.
*/
static inline bool kvmppc_shared_big_endian(struct kvm_vcpu *vcpu)
{
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
/* Only Book3S_64 PR supports bi-endian for now */
return vcpu->arch.shared_big_endian;
#elif defined(CONFIG_PPC_BOOK3S_64) && defined(__LITTLE_ENDIAN__)
/* Book3s_64 HV on little endian is always little endian */
return false;
#else
return true;
#endif
}
#define SPRNG_WRAPPER_GET(reg, bookehv_spr) \
static inline ulong kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
{ \
return mfspr(bookehv_spr); \
} \
#define SPRNG_WRAPPER_SET(reg, bookehv_spr) \
static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, ulong val) \
{ \
mtspr(bookehv_spr, val); \
} \
#define SHARED_WRAPPER_GET(reg, size) \
static inline u##size kvmppc_get_##reg(struct kvm_vcpu *vcpu) \
{ \
if (kvmppc_shared_big_endian(vcpu)) \
return be##size##_to_cpu(vcpu->arch.shared->reg); \
else \
return le##size##_to_cpu(vcpu->arch.shared->reg); \
} \
#define SHARED_WRAPPER_SET(reg, size) \
static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, u##size val) \
{ \
if (kvmppc_shared_big_endian(vcpu)) \
vcpu->arch.shared->reg = cpu_to_be##size(val); \
else \
vcpu->arch.shared->reg = cpu_to_le##size(val); \
} \
#define SHARED_WRAPPER(reg, size) \
SHARED_WRAPPER_GET(reg, size) \
SHARED_WRAPPER_SET(reg, size) \
#define SPRNG_WRAPPER(reg, bookehv_spr) \
SPRNG_WRAPPER_GET(reg, bookehv_spr) \
SPRNG_WRAPPER_SET(reg, bookehv_spr) \
#ifdef CONFIG_KVM_BOOKE_HV
#define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
SPRNG_WRAPPER(reg, bookehv_spr) \
#else
#define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr) \
SHARED_WRAPPER(reg, size) \
#endif
SHARED_WRAPPER(critical, 64)
SHARED_SPRNG_WRAPPER(sprg0, 64, SPRN_GSPRG0)
SHARED_SPRNG_WRAPPER(sprg1, 64, SPRN_GSPRG1)
SHARED_SPRNG_WRAPPER(sprg2, 64, SPRN_GSPRG2)
SHARED_SPRNG_WRAPPER(sprg3, 64, SPRN_GSPRG3)
SHARED_SPRNG_WRAPPER(srr0, 64, SPRN_GSRR0)
SHARED_SPRNG_WRAPPER(srr1, 64, SPRN_GSRR1)
SHARED_SPRNG_WRAPPER(dar, 64, SPRN_GDEAR)
SHARED_SPRNG_WRAPPER(esr, 64, SPRN_GESR)
SHARED_WRAPPER_GET(msr, 64)
static inline void kvmppc_set_msr_fast(struct kvm_vcpu *vcpu, u64 val)
{
if (kvmppc_shared_big_endian(vcpu))
vcpu->arch.shared->msr = cpu_to_be64(val);
else
vcpu->arch.shared->msr = cpu_to_le64(val);
}
SHARED_WRAPPER(dsisr, 32)
SHARED_WRAPPER(int_pending, 32)
SHARED_WRAPPER(sprg4, 64)
SHARED_WRAPPER(sprg5, 64)
SHARED_WRAPPER(sprg6, 64)
SHARED_WRAPPER(sprg7, 64)
static inline u32 kvmppc_get_sr(struct kvm_vcpu *vcpu, int nr)
{
if (kvmppc_shared_big_endian(vcpu))
return be32_to_cpu(vcpu->arch.shared->sr[nr]);
else
return le32_to_cpu(vcpu->arch.shared->sr[nr]);
}
static inline void kvmppc_set_sr(struct kvm_vcpu *vcpu, int nr, u32 val)
{
if (kvmppc_shared_big_endian(vcpu))
vcpu->arch.shared->sr[nr] = cpu_to_be32(val);
else
vcpu->arch.shared->sr[nr] = cpu_to_le32(val);
}
/*
* Please call after prepare_to_enter. This function puts the lazy ee and irq
* disabled tracking state back to normal mode, without actually enabling
* interrupts.
*/
static inline void kvmppc_fix_ee_before_entry(void)
{
trace_hardirqs_on();
#ifdef CONFIG_PPC64
/*
* To avoid races, the caller must have gone directly from having
* interrupts fully-enabled to hard-disabled.
*/
WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS);
/* Only need to enable IRQs by hard enabling them after this */
local_paca->irq_happened = 0;
irq_soft_mask_set(IRQS_ENABLED);
#endif
}
static inline void kvmppc_fix_ee_after_exit(void)
{
#ifdef CONFIG_PPC64
/* Only need to enable IRQs by hard enabling them after this */
local_paca->irq_happened = PACA_IRQ_HARD_DIS;
irq_soft_mask_set(IRQS_ALL_DISABLED);
#endif
trace_hardirqs_off();
}
static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
{
ulong ea;
ulong msr_64bit = 0;
ea = kvmppc_get_gpr(vcpu, rb);
if (ra)
ea += kvmppc_get_gpr(vcpu, ra);
#if defined(CONFIG_PPC_BOOK3E_64)
msr_64bit = MSR_CM;
#elif defined(CONFIG_PPC_BOOK3S_64)
msr_64bit = MSR_SF;
#endif
if (!(kvmppc_get_msr(vcpu) & msr_64bit))
ea = (uint32_t)ea;
return ea;
}
extern void xics_wake_cpu(int cpu);
#endif /* __POWERPC_KVM_PPC_H__ */