Adding upstream version 4.19.249.upstream/4.19.249upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 440 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h
new file mode 100644
index 000000000..dd18d8174
--- /dev/null
+++ b/arch/powerpc/include/asm/kvm_book3s.h
@@ -0,0 +1,440 @@
+/*
+ * 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 SUSE Linux Products GmbH 2009
+ *
+ * Authors: Alexander Graf <agraf@suse.de>
+ */
+
+#ifndef __ASM_KVM_BOOK3S_H__
+#define __ASM_KVM_BOOK3S_H__
+
+#include <linux/types.h>
+#include <linux/kvm_host.h>
+#include <asm/kvm_book3s_asm.h>
+
+struct kvmppc_bat {
+	u64 raw;
+	u32 bepi;
+	u32 bepi_mask;
+	u32 brpn;
+	u8 wimg;
+	u8 pp;
+	bool vs		: 1;
+	bool vp		: 1;
+};
+
+struct kvmppc_sid_map {
+	u64 guest_vsid;
+	u64 guest_esid;
+	u64 host_vsid;
+	bool valid	: 1;
+};
+
+#define SID_MAP_BITS    9
+#define SID_MAP_NUM     (1 << SID_MAP_BITS)
+#define SID_MAP_MASK    (SID_MAP_NUM - 1)
+
+#ifdef CONFIG_PPC_BOOK3S_64
+#define SID_CONTEXTS	1
+#else
+#define SID_CONTEXTS	128
+#define VSID_POOL_SIZE	(SID_CONTEXTS * 16)
+#endif
+
+struct hpte_cache {
+	struct hlist_node list_pte;
+	struct hlist_node list_pte_long;
+	struct hlist_node list_vpte;
+	struct hlist_node list_vpte_long;
+#ifdef CONFIG_PPC_BOOK3S_64
+	struct hlist_node list_vpte_64k;
+#endif
+	struct rcu_head rcu_head;
+	u64 host_vpn;
+	u64 pfn;
+	ulong slot;
+	struct kvmppc_pte pte;
+	int pagesize;
+};
+
+/*
+ * Struct for a virtual core.
+ * Note: entry_exit_map combines a bitmap of threads that have entered
+ * in the bottom 8 bits and a bitmap of threads that have exited in the
+ * next 8 bits.  This is so that we can atomically set the entry bit
+ * iff the exit map is 0 without taking a lock.
+ */
+struct kvmppc_vcore {
+	int n_runnable;
+	int num_threads;
+	int entry_exit_map;
+	int napping_threads;
+	int first_vcpuid;
+	u16 pcpu;
+	u16 last_cpu;
+	u8 vcore_state;
+	u8 in_guest;
+	struct kvm_vcpu *runnable_threads[MAX_SMT_THREADS];
+	struct list_head preempt_list;
+	spinlock_t lock;
+	struct swait_queue_head wq;
+	spinlock_t stoltb_lock;	/* protects stolen_tb and preempt_tb */
+	u64 stolen_tb;
+	u64 preempt_tb;
+	struct kvm_vcpu *runner;
+	struct kvm *kvm;
+	u64 tb_offset;		/* guest timebase - host timebase */
+	u64 tb_offset_applied;	/* timebase offset currently in force */
+	ulong lpcr;
+	u32 arch_compat;
+	ulong pcr;
+	ulong dpdes;		/* doorbell state (POWER8) */
+	ulong vtb;		/* virtual timebase */
+	ulong conferring_threads;
+	unsigned int halt_poll_ns;
+	atomic_t online_count;
+};
+
+struct kvmppc_vcpu_book3s {
+	struct kvmppc_sid_map sid_map[SID_MAP_NUM];
+	struct {
+		u64 esid;
+		u64 vsid;
+	} slb_shadow[64];
+	u8 slb_shadow_max;
+	struct kvmppc_bat ibat[8];
+	struct kvmppc_bat dbat[8];
+	u64 hid[6];
+	u64 gqr[8];
+	u64 sdr1;
+	u64 hior;
+	u64 msr_mask;
+	u64 vtb;
+#ifdef CONFIG_PPC_BOOK3S_32
+	u32 vsid_pool[VSID_POOL_SIZE];
+	u32 vsid_next;
+#else
+	u64 proto_vsid_first;
+	u64 proto_vsid_max;
+	u64 proto_vsid_next;
+#endif
+	int context_id[SID_CONTEXTS];
+
+	bool hior_explicit;		/* HIOR is set by ioctl, not PVR */
+
+	struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
+	struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
+	struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
+	struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
+#ifdef CONFIG_PPC_BOOK3S_64
+	struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
+#endif
+	int hpte_cache_count;
+	spinlock_t mmu_lock;
+};
+
+#define VSID_REAL	0x07ffffffffc00000ULL
+#define VSID_BAT	0x07ffffffffb00000ULL
+#define VSID_64K	0x0800000000000000ULL
+#define VSID_1T		0x1000000000000000ULL
+#define VSID_REAL_DR	0x2000000000000000ULL
+#define VSID_REAL_IR	0x4000000000000000ULL
+#define VSID_PR		0x8000000000000000ULL
+
+extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
+extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
+extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
+extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
+extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
+extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
+extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
+extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
+			       bool iswrite);
+extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
+extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
+extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
+extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
+extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
+			struct kvm_vcpu *vcpu, unsigned long addr,
+			unsigned long status);
+extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
+			unsigned long slb_v, unsigned long valid);
+extern int kvmppc_hv_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu,
+			unsigned long gpa, gva_t ea, int is_store);
+
+extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
+extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
+extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
+extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
+extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
+extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
+extern int kvmppc_mmu_hpte_sysinit(void);
+extern void kvmppc_mmu_hpte_sysexit(void);
+extern int kvmppc_mmu_hv_init(void);
+extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
+
+extern int kvmppc_book3s_radix_page_fault(struct kvm_run *run,
+			struct kvm_vcpu *vcpu,
+			unsigned long ea, unsigned long dsisr);
+extern int kvmppc_mmu_radix_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
+			struct kvmppc_pte *gpte, bool data, bool iswrite);
+extern int kvmppc_init_vm_radix(struct kvm *kvm);
+extern void kvmppc_free_radix(struct kvm *kvm);
+extern int kvmppc_radix_init(void);
+extern void kvmppc_radix_exit(void);
+extern int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
+			unsigned long gfn);
+extern int kvm_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
+			unsigned long gfn);
+extern int kvm_test_age_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
+			unsigned long gfn);
+extern long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm,
+			struct kvm_memory_slot *memslot, unsigned long *map);
+extern int kvmhv_get_rmmu_info(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
+
+/* XXX remove this export when load_last_inst() is generic */
+extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
+extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
+extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
+					  unsigned int vec);
+extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
+extern void kvmppc_trigger_fac_interrupt(struct kvm_vcpu *vcpu, ulong fac);
+extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
+			   bool upper, u32 val);
+extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
+extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
+extern kvm_pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa,
+			bool writing, bool *writable);
+extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
+			unsigned long *rmap, long pte_index, int realmode);
+extern void kvmppc_update_dirty_map(struct kvm_memory_slot *memslot,
+			unsigned long gfn, unsigned long psize);
+extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
+			unsigned long pte_index);
+void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
+			unsigned long pte_index);
+extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
+			unsigned long *nb_ret);
+extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
+			unsigned long gpa, bool dirty);
+extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
+			long pte_index, unsigned long pteh, unsigned long ptel,
+			pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
+extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
+			unsigned long pte_index, unsigned long avpn,
+			unsigned long *hpret);
+extern long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm,
+			struct kvm_memory_slot *memslot, unsigned long *map);
+extern void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa,
+			struct kvm_memory_slot *memslot,
+			unsigned long *map);
+extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
+			unsigned long mask);
+extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
+
+extern int kvmhv_p9_tm_emulation_early(struct kvm_vcpu *vcpu);
+extern int kvmhv_p9_tm_emulation(struct kvm_vcpu *vcpu);
+extern void kvmhv_emulate_tm_rollback(struct kvm_vcpu *vcpu);
+
+extern void kvmppc_entry_trampoline(void);
+extern void kvmppc_hv_entry_trampoline(void);
+extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
+extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
+extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
+extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
+extern int kvmppc_hcall_impl_pr(unsigned long cmd);
+extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
+extern void kvmppc_copy_to_svcpu(struct kvm_vcpu *vcpu);
+extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu);
+
+#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
+void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu);
+void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu);
+void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu);
+void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu);
+#else
+static inline void kvmppc_save_tm_pr(struct kvm_vcpu *vcpu) {}
+static inline void kvmppc_restore_tm_pr(struct kvm_vcpu *vcpu) {}
+static inline void kvmppc_save_tm_sprs(struct kvm_vcpu *vcpu) {}
+static inline void kvmppc_restore_tm_sprs(struct kvm_vcpu *vcpu) {}
+#endif
+
+void kvmppc_giveup_fac(struct kvm_vcpu *vcpu, ulong fac);
+
+extern int kvm_irq_bypass;
+
+static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.book3s;
+}
+
+/* Also add subarch specific defines */
+
+#ifdef CONFIG_KVM_BOOK3S_32_HANDLER
+#include <asm/kvm_book3s_32.h>
+#endif
+#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
+#include <asm/kvm_book3s_64.h>
+#endif
+
+static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
+{
+	vcpu->arch.regs.gpr[num] = val;
+}
+
+static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
+{
+	return vcpu->arch.regs.gpr[num];
+}
+
+static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
+{
+	vcpu->arch.regs.ccr = val;
+}
+
+static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.regs.ccr;
+}
+
+static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, ulong val)
+{
+	vcpu->arch.regs.xer = val;
+}
+
+static inline ulong kvmppc_get_xer(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.regs.xer;
+}
+
+static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
+{
+	vcpu->arch.regs.ctr = val;
+}
+
+static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.regs.ctr;
+}
+
+static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
+{
+	vcpu->arch.regs.link = val;
+}
+
+static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.regs.link;
+}
+
+static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
+{
+	vcpu->arch.regs.nip = val;
+}
+
+static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.regs.nip;
+}
+
+static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
+static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
+{
+	return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
+}
+
+static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
+{
+	return vcpu->arch.fault_dar;
+}
+
+static inline bool is_kvmppc_resume_guest(int r)
+{
+	return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
+}
+
+static inline bool is_kvmppc_hv_enabled(struct kvm *kvm);
+static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu)
+{
+	/* Only PR KVM supports the magic page */
+	return !is_kvmppc_hv_enabled(vcpu->kvm);
+}
+
+extern int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu);
+extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu);
+
+/* Magic register values loaded into r3 and r4 before the 'sc' assembly
+ * instruction for the OSI hypercalls */
+#define OSI_SC_MAGIC_R3			0x113724FA
+#define OSI_SC_MAGIC_R4			0x77810F9B
+
+#define INS_DCBZ			0x7c0007ec
+/* TO = 31 for unconditional trap */
+#define INS_TW				0x7fe00008
+
+/* LPIDs we support with this build -- runtime limit may be lower */
+#define KVMPPC_NR_LPIDS			(LPID_RSVD + 1)
+
+#define SPLIT_HACK_MASK			0xff000000
+#define SPLIT_HACK_OFFS			0xfb000000
+
+/*
+ * This packs a VCPU ID from the [0..KVM_MAX_VCPU_ID) space down to the
+ * [0..KVM_MAX_VCPUS) space, using knowledge of the guest's core stride
+ * (but not its actual threading mode, which is not available) to avoid
+ * collisions.
+ *
+ * The implementation leaves VCPU IDs from the range [0..KVM_MAX_VCPUS) (block
+ * 0) unchanged: if the guest is filling each VCORE completely then it will be
+ * using consecutive IDs and it will fill the space without any packing.
+ *
+ * For higher VCPU IDs, the packed ID is based on the VCPU ID modulo
+ * KVM_MAX_VCPUS (effectively masking off the top bits) and then an offset is
+ * added to avoid collisions.
+ *
+ * VCPU IDs in the range [KVM_MAX_VCPUS..(KVM_MAX_VCPUS*2)) (block 1) are only
+ * possible if the guest is leaving at least 1/2 of each VCORE empty, so IDs
+ * can be safely packed into the second half of each VCORE by adding an offset
+ * of (stride / 2).
+ *
+ * Similarly, if VCPU IDs in the range [(KVM_MAX_VCPUS*2)..(KVM_MAX_VCPUS*4))
+ * (blocks 2 and 3) are seen, the guest must be leaving at least 3/4 of each
+ * VCORE empty so packed IDs can be offset by (stride / 4) and (stride * 3 / 4).
+ *
+ * Finally, VCPU IDs from blocks 5..7 will only be seen if the guest is using a
+ * stride of 8 and 1 thread per core so the remaining offsets of 1, 5, 3 and 7
+ * must be free to use.
+ *
+ * (The offsets for each block are stored in block_offsets[], indexed by the
+ * block number if the stride is 8. For cases where the guest's stride is less
+ * than 8, we can re-use the block_offsets array by multiplying the block
+ * number by (MAX_SMT_THREADS / stride) to reach the correct entry.)
+ */
+static inline u32 kvmppc_pack_vcpu_id(struct kvm *kvm, u32 id)
+{
+	const int block_offsets[MAX_SMT_THREADS] = {0, 4, 2, 6, 1, 5, 3, 7};
+	int stride = kvm->arch.emul_smt_mode;
+	int block = (id / KVM_MAX_VCPUS) * (MAX_SMT_THREADS / stride);
+	u32 packed_id;
+
+	if (WARN_ONCE(block >= MAX_SMT_THREADS, "VCPU ID too large to pack"))
+		return 0;
+	packed_id = (id % KVM_MAX_VCPUS) + block_offsets[block];
+	if (WARN_ONCE(packed_id >= KVM_MAX_VCPUS, "VCPU ID packing failed"))
+		return 0;
+	return packed_id;
+}
+
+#endif /* __ASM_KVM_BOOK3S_H__ */