diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-16 13:00:24 -0800 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-11-16 13:00:24 -0800 |
commit | 974aa5630b318938273d7efe7a2cf031c7b927db (patch) | |
tree | b79803c07b9c16d87058ce69f80ebe173cdfd838 /arch/powerpc | |
parent | 441692aafc1731087bbaf657a8b6059d95c2a6df (diff) | |
parent | a6014f1ab7088dc02b58991cfb6b32a34afdbf12 (diff) |
Merge tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Radim Krčmář:
"First batch of KVM changes for 4.15
Common:
- Python 3 support in kvm_stat
- Accounting of slabs to kmemcg
ARM:
- Optimized arch timer handling for KVM/ARM
- Improvements to the VGIC ITS code and introduction of an ITS reset
ioctl
- Unification of the 32-bit fault injection logic
- More exact external abort matching logic
PPC:
- Support for running hashed page table (HPT) MMU mode on a host that
is using the radix MMU mode; single threaded mode on POWER 9 is
added as a pre-requisite
- Resolution of merge conflicts with the last second 4.14 HPT fixes
- Fixes and cleanups
s390:
- Some initial preparation patches for exitless interrupts and crypto
- New capability for AIS migration
- Fixes
x86:
- Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs,
and after-reset state
- Refined dependencies for VMX features
- Fixes for nested SMI injection
- A lot of cleanups"
* tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (89 commits)
KVM: s390: provide a capability for AIS state migration
KVM: s390: clear_io_irq() requests are not expected for adapter interrupts
KVM: s390: abstract conversion between isc and enum irq_types
KVM: s390: vsie: use common code functions for pinning
KVM: s390: SIE considerations for AP Queue virtualization
KVM: s390: document memory ordering for kvm_s390_vcpu_wakeup
KVM: PPC: Book3S HV: Cosmetic post-merge cleanups
KVM: arm/arm64: fix the incompatible matching for external abort
KVM: arm/arm64: Unify 32bit fault injection
KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESET
KVM: arm/arm64: Document KVM_DEV_ARM_ITS_CTRL_RESET
KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is cleared
KVM: arm/arm64: vgic-its: New helper functions to free the caches
KVM: arm/arm64: vgic-its: Remove kvm_its_unmap_device
arm/arm64: KVM: Load the timer state when enabling the timer
KVM: arm/arm64: Rework kvm_timer_should_fire
KVM: arm/arm64: Get rid of kvm_timer_flush_hwstate
KVM: arm/arm64: Avoid phys timer emulation in vcpu entry/exit
KVM: arm/arm64: Move phys_timer_emulate function
KVM: arm/arm64: Use kvm_arm_timer_set/get_reg for guest register traps
...
Diffstat (limited to 'arch/powerpc')
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s.h | 3 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_64.h | 140 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_book3s_asm.h | 13 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_host.h | 6 | ||||
-rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 3 | ||||
-rw-r--r-- | arch/powerpc/kernel/asm-offsets.c | 3 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_hv.c | 128 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_64_mmu_radix.c | 51 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_64_slb.S | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 347 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv_builtin.c | 117 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv_rm_mmu.c | 65 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_hv_rmhandlers.S | 197 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_pr.c | 16 | ||||
-rw-r--r-- | arch/powerpc/kvm/book3s_pr_papr.c | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/e500_mmu_host.c | 2 | ||||
-rw-r--r-- | arch/powerpc/kvm/powerpc.c | 3 |
17 files changed, 800 insertions, 298 deletions
diff --git a/arch/powerpc/include/asm/kvm_book3s.h b/arch/powerpc/include/asm/kvm_book3s.h index b8d5b8e35244..9a667007bff8 100644 --- a/arch/powerpc/include/asm/kvm_book3s.h +++ b/arch/powerpc/include/asm/kvm_book3s.h @@ -216,7 +216,8 @@ 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_rmap_change(unsigned long *rmap, unsigned long psize); +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, diff --git a/arch/powerpc/include/asm/kvm_book3s_64.h b/arch/powerpc/include/asm/kvm_book3s_64.h index d55c7f881ce7..735cfa35298a 100644 --- a/arch/powerpc/include/asm/kvm_book3s_64.h +++ b/arch/powerpc/include/asm/kvm_book3s_64.h @@ -20,6 +20,8 @@ #ifndef __ASM_KVM_BOOK3S_64_H__ #define __ASM_KVM_BOOK3S_64_H__ +#include <linux/string.h> +#include <asm/bitops.h> #include <asm/book3s/64/mmu-hash.h> /* Power architecture requires HPT is at least 256kiB, at most 64TiB */ @@ -107,18 +109,96 @@ static inline void __unlock_hpte(__be64 *hpte, unsigned long hpte_v) hpte[0] = cpu_to_be64(hpte_v); } +/* + * These functions encode knowledge of the POWER7/8/9 hardware + * interpretations of the HPTE LP (large page size) field. + */ +static inline int kvmppc_hpte_page_shifts(unsigned long h, unsigned long l) +{ + unsigned int lphi; + + if (!(h & HPTE_V_LARGE)) + return 12; /* 4kB */ + lphi = (l >> 16) & 0xf; + switch ((l >> 12) & 0xf) { + case 0: + return !lphi ? 24 : -1; /* 16MB */ + break; + case 1: + return 16; /* 64kB */ + break; + case 3: + return !lphi ? 34 : -1; /* 16GB */ + break; + case 7: + return (16 << 8) + 12; /* 64kB in 4kB */ + break; + case 8: + if (!lphi) + return (24 << 8) + 16; /* 16MB in 64kkB */ + if (lphi == 3) + return (24 << 8) + 12; /* 16MB in 4kB */ + break; + } + return -1; +} + +static inline int kvmppc_hpte_base_page_shift(unsigned long h, unsigned long l) +{ + return kvmppc_hpte_page_shifts(h, l) & 0xff; +} + +static inline int kvmppc_hpte_actual_page_shift(unsigned long h, unsigned long l) +{ + int tmp = kvmppc_hpte_page_shifts(h, l); + + if (tmp >= 0x100) + tmp >>= 8; + return tmp; +} + +static inline unsigned long kvmppc_actual_pgsz(unsigned long v, unsigned long r) +{ + return 1ul << kvmppc_hpte_actual_page_shift(v, r); +} + +static inline int kvmppc_pgsize_lp_encoding(int base_shift, int actual_shift) +{ + switch (base_shift) { + case 12: + switch (actual_shift) { + case 12: + return 0; + case 16: + return 7; + case 24: + return 0x38; + } + break; + case 16: + switch (actual_shift) { + case 16: + return 1; + case 24: + return 8; + } + break; + case 24: + return 0; + } + return -1; +} + static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r, unsigned long pte_index) { - int i, b_psize = MMU_PAGE_4K, a_psize = MMU_PAGE_4K; - unsigned int penc; + int a_pgshift, b_pgshift; unsigned long rb = 0, va_low, sllp; - unsigned int lp = (r >> LP_SHIFT) & ((1 << LP_BITS) - 1); - if (v & HPTE_V_LARGE) { - i = hpte_page_sizes[lp]; - b_psize = i & 0xf; - a_psize = i >> 4; + b_pgshift = a_pgshift = kvmppc_hpte_page_shifts(v, r); + if (a_pgshift >= 0x100) { + b_pgshift &= 0xff; + a_pgshift >>= 8; } /* @@ -152,37 +232,33 @@ static inline unsigned long compute_tlbie_rb(unsigned long v, unsigned long r, va_low ^= v >> (SID_SHIFT_1T - 16); va_low &= 0x7ff; - switch (b_psize) { - case MMU_PAGE_4K: - sllp = get_sllp_encoding(a_psize); - rb |= sllp << 5; /* AP field */ + if (b_pgshift == 12) { + if (a_pgshift > 12) { + sllp = (a_pgshift == 16) ? 5 : 4; + rb |= sllp << 5; /* AP field */ + } rb |= (va_low & 0x7ff) << 12; /* remaining 11 bits of AVA */ - break; - default: - { + } else { int aval_shift; /* * remaining bits of AVA/LP fields * Also contain the rr bits of LP */ - rb |= (va_low << mmu_psize_defs[b_psize].shift) & 0x7ff000; + rb |= (va_low << b_pgshift) & 0x7ff000; /* * Now clear not needed LP bits based on actual psize */ - rb &= ~((1ul << mmu_psize_defs[a_psize].shift) - 1); + rb &= ~((1ul << a_pgshift) - 1); /* * AVAL field 58..77 - base_page_shift bits of va * we have space for 58..64 bits, Missing bits should * be zero filled. +1 is to take care of L bit shift */ - aval_shift = 64 - (77 - mmu_psize_defs[b_psize].shift) + 1; + aval_shift = 64 - (77 - b_pgshift) + 1; rb |= ((va_low << aval_shift) & 0xfe); rb |= 1; /* L field */ - penc = mmu_psize_defs[b_psize].penc[a_psize]; - rb |= penc << 12; /* LP field */ - break; - } + rb |= r & 0xff000 & ((1ul << a_pgshift) - 1); /* LP field */ } rb |= (v >> HPTE_V_SSIZE_SHIFT) << 8; /* B field */ return rb; @@ -370,6 +446,28 @@ static inline unsigned long kvmppc_hpt_mask(struct kvm_hpt_info *hpt) return (1UL << (hpt->order - 7)) - 1; } +/* Set bits in a dirty bitmap, which is in LE format */ +static inline void set_dirty_bits(unsigned long *map, unsigned long i, + unsigned long npages) +{ + + if (npages >= 8) + memset((char *)map + i / 8, 0xff, npages / 8); + else + for (; npages; ++i, --npages) + __set_bit_le(i, map); +} + +static inline void set_dirty_bits_atomic(unsigned long *map, unsigned long i, + unsigned long npages) +{ + if (npages >= 8) + memset((char *)map + i / 8, 0xff, npages / 8); + else + for (; npages; ++i, --npages) + set_bit_le(i, map); +} + #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #endif /* __ASM_KVM_BOOK3S_64_H__ */ diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h index 7cea76f11c26..ab386af2904f 100644 --- a/arch/powerpc/include/asm/kvm_book3s_asm.h +++ b/arch/powerpc/include/asm/kvm_book3s_asm.h @@ -82,6 +82,16 @@ struct kvm_split_mode { u8 do_nap; u8 napped[MAX_SMT_THREADS]; struct kvmppc_vcore *vc[MAX_SUBCORES]; + /* Bits for changing lpcr on P9 */ + unsigned long lpcr_req; + unsigned long lpidr_req; + unsigned long host_lpcr; + u32 do_set; + u32 do_restore; + union { + u32 allphases; + u8 phase[4]; + } lpcr_sync; }; /* @@ -107,7 +117,8 @@ struct kvmppc_host_state { u8 hwthread_req; u8 hwthread_state; u8 host_ipi; - u8 ptid; + u8 ptid; /* thread number within subcore when split */ + u8 tid; /* thread number within whole core */ struct kvm_vcpu *kvm_vcpu; struct kvmppc_vcore *kvm_vcore; void __iomem *xics_phys; diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index e372ed871c51..3aa5b577cd60 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -235,10 +235,7 @@ struct revmap_entry { */ #define KVMPPC_RMAP_LOCK_BIT 63 #define KVMPPC_RMAP_RC_SHIFT 32 -#define KVMPPC_RMAP_CHG_SHIFT 48 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) -#define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) -#define KVMPPC_RMAP_CHG_ORDER (0x3ful << KVMPPC_RMAP_CHG_SHIFT) #define KVMPPC_RMAP_PRESENT 0x100000000ul #define KVMPPC_RMAP_INDEX 0xfffffffful @@ -276,7 +273,7 @@ struct kvm_arch { int tlbie_lock; unsigned long lpcr; unsigned long vrma_slb_v; - int hpte_setup_done; + int mmu_ready; atomic_t vcpus_running; u32 online_vcores; atomic_t hpte_mod_interest; @@ -284,6 +281,7 @@ struct kvm_arch { cpumask_t cpu_in_guest; u8 radix; u8 fwnmi_enabled; + bool threads_indep; pgd_t *pgtable; u64 process_table; struct dentry *debugfs_dir; diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index ba5fadd6f3c9..96753f3aac6d 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -168,6 +168,7 @@ 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 long 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 long kvmppc_prepare_vrma(struct kvm *kvm, struct kvm_userspace_memory_region *mem); extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu, @@ -177,6 +178,8 @@ 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 long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm, struct kvm_create_spapr_tce_64 *args); diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index 9aace433491a..6b958414b4e0 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -642,6 +642,7 @@ int main(void) HSTATE_FIELD(HSTATE_SAVED_XIRR, saved_xirr); HSTATE_FIELD(HSTATE_HOST_IPI, host_ipi); HSTATE_FIELD(HSTATE_PTID, ptid); + HSTATE_FIELD(HSTATE_TID, tid); HSTATE_FIELD(HSTATE_MMCR0, host_mmcr[0]); HSTATE_FIELD(HSTATE_MMCR1, host_mmcr[1]); HSTATE_FIELD(HSTATE_MMCRA, host_mmcr[2]); @@ -667,6 +668,8 @@ int main(void) OFFSET(KVM_SPLIT_LDBAR, kvm_split_mode, ldbar); OFFSET(KVM_SPLIT_DO_NAP, kvm_split_mode, do_nap); OFFSET(KVM_SPLIT_NAPPED, kvm_split_mode, napped); + OFFSET(KVM_SPLIT_DO_SET, kvm_split_mode, do_set); + OFFSET(KVM_SPLIT_DO_RESTORE, kvm_split_mode, do_restore); #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #ifdef CONFIG_PPC_BOOK3S_64 diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c index 59247af5fd45..235319c2574e 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_hv.c +++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c @@ -73,8 +73,6 @@ struct kvm_resize_hpt { struct kvm_hpt_info hpt; }; -static void kvmppc_rmap_reset(struct kvm *kvm); - int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order) { unsigned long hpt = 0; @@ -106,7 +104,6 @@ int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order) /* Allocate reverse map array */ rev = vmalloc(sizeof(struct revmap_entry) * npte); if (!rev) { - pr_err("kvmppc_allocate_hpt: Couldn't alloc reverse map array\n"); if (cma) kvm_free_hpt_cma(page, 1 << (order - PAGE_SHIFT)); else @@ -137,19 +134,22 @@ long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order) long err = -EBUSY; struct kvm_hpt_info info; - if (kvm_is_radix(kvm)) - return -EINVAL; - mutex_lock(&kvm->lock); - if (kvm->arch.hpte_setup_done) { - kvm->arch.hpte_setup_done = 0; - /* order hpte_setup_done vs. vcpus_running */ + if (kvm->arch.mmu_ready) { + kvm->arch.mmu_ready = 0; + /* order mmu_ready vs. vcpus_running */ smp_mb(); if (atomic_read(&kvm->arch.vcpus_running)) { - kvm->arch.hpte_setup_done = 1; + kvm->arch.mmu_ready = 1; goto out; } } + if (kvm_is_radix(kvm)) { + err = kvmppc_switch_mmu_to_hpt(kvm); + if (err) + goto out; + } + if (kvm->arch.hpt.order == order) { /* We already have a suitable HPT */ @@ -183,6 +183,7 @@ out: void kvmppc_free_hpt(struct kvm_hpt_info *info) { vfree(info->rev); + info->rev = NULL; if (info->cma) kvm_free_hpt_cma(virt_to_page(info->virt), 1 << (info->order - PAGE_SHIFT)); @@ -334,7 +335,7 @@ static unsigned long kvmppc_mmu_get_real_addr(unsigned long v, unsigned long r, { unsigned long ra_mask; - ra_mask = hpte_page_size(v, r) - 1; + ra_mask = kvmppc_actual_pgsz(v, r) - 1; return (r & HPTE_R_RPN & ~ra_mask) | (ea & ra_mask); } @@ -350,6 +351,9 @@ static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr, int index; int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR); + if (kvm_is_radix(vcpu->kvm)) + return kvmppc_mmu_radix_xlate(vcpu, eaddr, gpte, data, iswrite); + /* Get SLB entry */ if (virtmode) { slbe = kvmppc_mmu_book3s_hv_find_slbe(vcpu, eaddr); @@ -505,7 +509,8 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, mmio_update = atomic64_read(&kvm->arch.mmio_update); if (mmio_update == vcpu->arch.pgfault_cache->mmio_update) { r = vcpu->arch.pgfault_cache->rpte; - psize = hpte_page_size(vcpu->arch.pgfault_hpte[0], r); + psize = kvmppc_actual_pgsz(vcpu->arch.pgfault_hpte[0], + r); gpa_base = r & HPTE_R_RPN & ~(psize - 1); gfn_base = gpa_base >> PAGE_SHIFT; gpa = gpa_base | (ea & (psize - 1)); @@ -534,7 +539,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, return RESUME_GUEST; /* Translate the logical address and get the page */ - psize = hpte_page_size(hpte[0], r); + psize = kvmppc_actual_pgsz(hpte[0], r); gpa_base = r & HPTE_R_RPN & ~(psize - 1); gfn_base = gpa_base >> PAGE_SHIFT; gpa = gpa_base | (ea & (psize - 1)); @@ -650,10 +655,10 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, /* * If the HPT is being resized, don't update the HPTE, * instead let the guest retry after the resize operation is complete. - * The synchronization for hpte_setup_done test vs. set is provided + * The synchronization for mmu_ready test vs. set is provided * by the HPTE lock. */ - if (!kvm->arch.hpte_setup_done) + if (!kvm->arch.mmu_ready) goto out_unlock; if ((hnow_v & ~HPTE_V_HVLOCK) != hpte[0] || hnow_r != hpte[1] || @@ -720,7 +725,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, goto out_put; } -static void kvmppc_rmap_reset(struct kvm *kvm) +void kvmppc_rmap_reset(struct kvm *kvm) { struct kvm_memslots *slots; struct kvm_memory_slot *memslot; @@ -786,6 +791,7 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva, /* Must be called with both HPTE and rmap locked */ static void kvmppc_unmap_hpte(struct kvm *kvm, unsigned long i, + struct kvm_memory_slot *memslot, unsigned long *rmapp, unsigned long gfn) { __be64 *hptep = (__be64 *) (kvm->arch.hpt.virt + (i << 4)); @@ -808,7 +814,7 @@ static void kvmppc_unmap_hpte(struct kvm *kvm, unsigned long i, /* Now check and modify the HPTE */ ptel = rev[i].guest_rpte; - psize = hpte_page_size(be64_to_cpu(hptep[0]), ptel); + psize = kvmppc_actual_pgsz(be64_to_cpu(hptep[0]), ptel); if ((be64_to_cpu(hptep[0]) & HPTE_V_VALID) && hpte_rpn(ptel, psize) == gfn) { hptep[0] |= cpu_to_be64(HPTE_V_ABSENT); @@ -817,8 +823,8 @@ static void kvmppc_unmap_hpte(struct kvm *kvm, unsigned long i, /* Harvest R and C */ rcbits = be64_to_cpu(hptep[1]) & (HPTE_R_R | HPTE_R_C); *rmapp |= rcbits << KVMPPC_RMAP_RC_SHIFT; - if (rcbits & HPTE_R_C) - kvmppc_update_rmap_change(rmapp, psize); + if ((rcbits & HPTE_R_C) && memslot->dirty_bitmap) + kvmppc_update_dirty_map(memslot, gfn, psize); if (rcbits & ~rev[i].guest_rpte) { rev[i].guest_rpte = ptel | rcbits; note_hpte_modification(kvm, &rev[i]); @@ -856,7 +862,7 @@ static int kvm_unmap_rmapp(struct kvm *kvm, struct kvm_memory_slot *memslot, continue; } - kvmppc_unmap_hpte(kvm, i, rmapp, gfn); + kvmppc_unmap_hpte(kvm, i, memslot, rmapp, gfn); unlock_rmap(rmapp); __unlock_hpte(hptep, be64_to_cpu(hptep[0])); } @@ -1039,14 +1045,6 @@ static int kvm_test_clear_dirty_npages(struct kvm *kvm, unsigned long *rmapp) retry: lock_rmap(rmapp); - if (*rmapp & KVMPPC_RMAP_CHANGED) { - long change_order = (*rmapp & KVMPPC_RMAP_CHG_ORDER) - >> KVMPPC_RMAP_CHG_SHIFT; - *rmapp &= ~(KVMPPC_RMAP_CHANGED | KVMPPC_RMAP_CHG_ORDER); - npages_dirty = 1; - if (change_order > PAGE_SHIFT) - npages_dirty = 1ul << (change_order - PAGE_SHIFT); - } if (!(*rmapp & KVMPPC_RMAP_PRESENT)) { unlock_rmap(rmapp); return npages_dirty; @@ -1102,7 +1100,7 @@ static int kvm_test_clear_dirty_npages(struct kvm *kvm, unsigned long *rmapp) rev[i].guest_rpte |= HPTE_R_C; note_hpte_modification(kvm, &rev[i]); } - n = hpte_page_size(v, r); + n = kvmppc_actual_pgsz(v, r); n = (n + PAGE_SIZE - 1) >> PAGE_SHIFT; if (n > npages_dirty) npages_dirty = n; @@ -1138,7 +1136,7 @@ void kvmppc_harvest_vpa_dirty(struct kvmppc_vpa *vpa, long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned long *map) { - unsigned long i, j; + unsigned long i; unsigned long *rmapp; preempt_disable(); @@ -1150,9 +1148,8 @@ long kvmppc_hv_get_dirty_log_hpt(struct kvm *kvm, * since we always put huge-page HPTEs in the rmap chain * corresponding to their page base address. */ - if (npages && map) - for (j = i; npages; ++j, --npages) - __set_bit_le(j, map); + if (npages) + set_dirty_bits(map, i, npages); ++rmapp; } preempt_enable(); @@ -1196,7 +1193,6 @@ void kvmppc_unpin_guest_page(struct kvm *kvm, void *va, unsigned long gpa, struct page *page = virt_to_page(va); struct kvm_memory_slot *memslot; unsigned long gfn; - unsigned long *rmap; int srcu_idx; put_page(page); @@ -1204,20 +1200,12 @@ void kvmppc_unpin_guest_page(struct kvm *kvm, void *va, unsigned long gpa, if (!dirty) return; - /* We need to mark this page dirty in the rmap chain */ + /* We need to mark this page dirty in the memslot dirty_bitmap, if any */ gfn = gpa >> PAGE_SHIFT; srcu_idx = srcu_read_lock(&kvm->srcu); memslot = gfn_to_memslot(kvm, gfn); - if (memslot) { - if (!kvm_is_radix(kvm)) { - rmap = &memslot->arch.rmap[gfn - memslot->base_gfn]; - lock_rmap(rmap); - *rmap |= KVMPPC_RMAP_CHANGED; - unlock_rmap(rmap); - } else if (memslot->dirty_bitmap) { - mark_page_dirty(kvm, gfn); - } - } + if (memslot && memslot->dirty_bitmap) + set_bit_le(gfn - memslot->base_gfn, memslot->dirty_bitmap); srcu_read_unlock(&kvm->srcu, srcu_idx); } @@ -1277,7 +1265,7 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize, guest_rpte = rev->guest_rpte; ret = -EIO; - apsize = hpte_page_size(vpte, guest_rpte); + apsize = kvmppc_actual_pgsz(vpte, guest_rpte); if (!apsize) goto out; @@ -1292,7 +1280,7 @@ static unsigned long resize_hpt_rehash_hpte(struct kvm_resize_hpt *resize, rmapp = &memslot->arch.rmap[gfn - memslot->base_gfn]; lock_rmap(rmapp); - kvmppc_unmap_hpte(kvm, idx, rmapp, gfn); + kvmppc_unmap_hpte(kvm, idx, memslot, rmapp, gfn); unlock_rmap(rmapp); } @@ -1465,7 +1453,7 @@ long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm, struct kvm_resize_hpt *resize; int ret; - if (flags != 0) + if (flags != 0 || kvm_is_radix(kvm)) return -EINVAL; if (shift && ((shift < 18) || (shift > 46))) @@ -1531,7 +1519,7 @@ long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm, struct kvm_resize_hpt *resize; long ret; - if (flags != 0) + if (flags != 0 || kvm_is_radix(kvm)) return -EINVAL; if (shift && ((shift < 18) || (shift > 46))) @@ -1543,15 +1531,15 @@ long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm, /* This shouldn't be possible */ ret = -EIO; - if (WARN_ON(!kvm->arch.hpte_setup_done)) + if (WARN_ON(!kvm->arch.mmu_ready)) goto out_no_hpt; /* Stop VCPUs from running while we mess with the HPT */ - kvm->arch.hpte_setup_done = 0; + kvm->arch.mmu_ready = 0; smp_mb(); /* Boot all CPUs out of the guest so they re-read - * hpte_setup_done */ + * mmu_ready */ on_each_cpu(resize_hpt_boot_vcpu, NULL, 1); ret = -ENXIO; @@ -1574,7 +1562,7 @@ long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm, out: /* Let VCPUs run again */ - kvm->arch.hpte_setup_done = 1; + kvm->arch.mmu_ready = 1; smp_mb(); out_no_hpt: resize_hpt_release(kvm, resize); @@ -1717,6 +1705,8 @@ static ssize_t kvm_htab_read(struct file *file, char __user *buf, if (!access_ok(VERIFY_WRITE, buf, count)) return -EFAULT; + if (kvm_is_radix(kvm)) + return 0; first_pass = ctx->first_pass; flags = ctx->flags; @@ -1810,20 +1800,22 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf, unsigned long tmp[2]; ssize_t nb; long int err, ret; - int hpte_setup; + int mmu_ready; if (!access_ok(VERIFY_READ, buf, count)) return -EFAULT; + if (kvm_is_radix(kvm)) + return -EINVAL; /* lock out vcpus from running while we're doing this */ mutex_lock(&kvm->lock); - hpte_setup = kvm->arch.hpte_setup_done; - if (hpte_setup) { - kvm->arch.hpte_setup_done = 0; /* temporarily */ - /* order hpte_setup_done vs. vcpus_running */ + mmu_ready = kvm->arch.mmu_ready; + if (mmu_ready) { + kvm->arch.mmu_ready = 0; /* temporarily */ + /* order mmu_ready vs. vcpus_running */ smp_mb(); if (atomic_read(&kvm->arch.vcpus_running)) { - kvm->arch.hpte_setup_done = 1; + kvm->arch.mmu_ready = 1; mutex_unlock(&kvm->lock); return -EBUSY; } @@ -1876,7 +1868,7 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf, "r=%lx\n", ret, i, v, r); goto out; } - if (!hpte_setup && is_vrma_hpte(v)) { + if (!mmu_ready && is_vrma_hpte(v)) { unsigned long psize = hpte_base_page_size(v, r); unsigned long senc = slb_pgsize_encoding(psize); unsigned long lpcr; @@ -1885,7 +1877,7 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf, (VRMA_VSID << SLB_VSID_SHIFT_1T); lpcr = senc << (LPCR_VRMASD_SH - 4); kvmppc_update_lpcr(kvm, lpcr, LPCR_VRMASD); - hpte_setup = 1; + mmu_ready = 1; } ++i; hptp += 2; @@ -1901,9 +1893,9 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf, } out: - /* Order HPTE updates vs. hpte_setup_done */ + /* Order HPTE updates vs. mmu_ready */ smp_wmb(); - kvm->arch.hpte_setup_done = hpte_setup; + kvm->arch.mmu_ready = mmu_ready; mutex_unlock(&kvm->lock); if (err) @@ -2012,6 +2004,10 @@ static ssize_t debugfs_htab_read(struct file *file, char __user *buf, struct kvm *kvm; __be64 *hptp; + kvm = p->kvm; + if (kvm_is_radix(kvm)) + return 0; + ret = mutex_lock_interruptible(&p->mutex); if (ret) return ret; @@ -2034,7 +2030,6 @@ static ssize_t debugfs_htab_read(struct file *file, char __user *buf, } } - kvm = p->kvm; i = p->hpt_index; hptp = (__be64 *)(kvm->arch.hpt.virt + (i * HPTE_SIZE)); for (; len != 0 && i < kvmppc_hpt_npte(&kvm->arch.hpt); @@ -2109,10 +2104,7 @@ void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu) vcpu->arch.slb_nr = 32; /* POWER7/POWER8 */ - if (kvm_is_radix(vcpu->kvm)) - mmu->xlate = kvmppc_mmu_radix_xlate; - else - mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate; + mmu->xlate = kvmppc_mmu_book3s_64_hv_xlate; mmu->reset_msr = kvmppc_mmu_book3s_64_hv_reset_msr; vcpu->arch.hflags |= BOOK3S_HFLAG_SLB; diff --git a/arch/powerpc/kvm/book3s_64_mmu_radix.c b/arch/powerpc/kvm/book3s_64_mmu_radix.c index c5d7435455f1..58618f644c56 100644 --- a/arch/powerpc/kvm/book3s_64_mmu_radix.c +++ b/arch/powerpc/kvm/book3s_64_mmu_radix.c @@ -474,26 +474,6 @@ int kvmppc_book3s_radix_page_fault(struct kvm_run *run, struct kvm_vcpu *vcpu, return ret; } -static void mark_pages_dirty(struct kvm *kvm, struct kvm_memory_slot *memslot, - unsigned long gfn, unsigned int order) -{ - unsigned long i, limit; - unsigned long *dp; - - if (!memslot->dirty_bitmap) - return; - limit = 1ul << order; - if (limit < BITS_PER_LONG) { - for (i = 0; i < limit; ++i) - mark_page_dirty(kvm, gfn + i); - return; - } - dp = memslot->dirty_bitmap + (gfn - memslot->base_gfn); - limit /= BITS_PER_LONG; - for (i = 0; i < limit; ++i) - *dp++ = ~0ul; -} - /* Called with kvm->lock held */ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned long gfn) @@ -508,12 +488,11 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, old = kvmppc_radix_update_pte(kvm, ptep, _PAGE_PRESENT, 0, gpa, shift); kvmppc_radix_tlbie_page(kvm, gpa, shift); - if (old & _PAGE_DIRTY) { - if (!shift) - mark_page_dirty(kvm, gfn); - else - mark_pages_dirty(kvm, memslot, - gfn, shift - PAGE_SHIFT); + if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) { + unsigned long npages = 1; + if (shift) + npages = 1ul << (shift - PAGE_SHIFT); + kvmppc_update_dirty_map(memslot, gfn, npages); } } return 0; @@ -579,20 +558,8 @@ long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm, struct kvm_memory_slot *memslot, unsigned long *map) { unsigned long i, j; - unsigned long n, *p; int npages; - /* - * Radix accumulates dirty bits in the first half of the - * memslot's dirty_bitmap area, for when pages are paged - * out or modified by the host directly. Pick up these - * bits and add them to the map. - */ - n = kvm_dirty_bitmap_bytes(memslot) / sizeof(long); - p = memslot->dirty_bitmap; - for (i = 0; i < n; ++i) - map[i] |= xchg(&p[i], 0); - for (i = 0; i < memslot->npages; i = j) { npages = kvm_radix_test_clear_dirty(kvm, memslot, i); @@ -604,9 +571,10 @@ long kvmppc_hv_get_dirty_log_radix(struct kvm *kvm, * real address, if npages > 1 we can skip to i + npages. */ j = i + 1; - if (npages) - for (j = i; npages; ++j, --npages) - __set_bit_le(j, map); + if (npages) { + set_dirty_bits(map, i, npages); + i = j + npages; + } } return 0; } @@ -694,6 +662,7 @@ void kvmppc_free_radix(struct kvm *kvm) pgd_clear(pgd); } pgd_free(kvm->mm, kvm->arch.pgtable); + kvm->arch.pgtable = NULL; } static void pte_ctor(void *addr) diff --git a/arch/powerpc/kvm/book3s_64_slb.S b/arch/powerpc/kvm/book3s_64_slb.S index 3589c4e3d49b..688722acd692 100644 --- a/arch/powerpc/kvm/book3s_64_slb.S +++ b/arch/powerpc/kvm/book3s_64_slb.S @@ -113,7 +113,7 @@ slb_do_enter: /* Remove all SLB entries that are in use. */ - li r0, r0 + li r0, 0 slbmte r0, r0 slbia diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 40e5857c4b1c..79ea3d9269db 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -19,6 +19,7 @@ */ #include <linux/kvm_host.h> +#include <linux/kernel.h> #include <linux/err.h> #include <linux/slab.h> #include <linux/preempt.h> @@ -98,6 +99,10 @@ static int target_smt_mode; module_param(target_smt_mode, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(target_smt_mode, "Target threads per core (0 = max)"); +static bool indep_threads_mode = true; +module_param(indep_threads_mode, bool, S_IRUGO | S_IWUSR); +MODULE_PARM_DESC(indep_threads_mode, "Independent-threads mode (only on POWER9)"); + #ifdef CONFIG_KVM_XICS static struct kernel_param_ops module_param_ops = { .set = param_set_int, @@ -115,6 +120,7 @@ MODULE_PARM_DESC(h_ipi_redirect, "Redirect H_IPI wakeup to a free host core"); static void kvmppc_end_cede(struct kvm_vcpu *vcpu); static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu); +static void kvmppc_setup_partition_table(struct kvm *kvm); static inline struct kvm_vcpu *next_runnable_thread(struct kvmppc_vcore *vc, int *ip) @@ -1734,9 +1740,9 @@ static int kvmppc_set_one_reg_hv(struct kvm_vcpu *vcpu, u64 id, * MMU mode (radix or HPT), unfortunately, but since we only support * HPT guests on a HPT host so far, that isn't an impediment yet. */ -static int threads_per_vcore(void) +static int threads_per_vcore(struct kvm *kvm) { - if (cpu_has_feature(CPU_FTR_ARCH_300)) + if (kvm->arch.threads_indep) return 1; return threads_per_subcore; } @@ -1774,7 +1780,7 @@ static struct debugfs_timings_element { {"cede", offsetof(struct kvm_vcpu, arch.cede_time)}, }; -#define N_TIMINGS (sizeof(timings) / sizeof(timings[0])) +#define N_TIMINGS (ARRAY_SIZE(timings)) struct debugfs_timings_state { struct kvm_vcpu *vcpu; @@ -2228,11 +2234,10 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc) kvmppc_ipi_thread(cpu); } -static void kvmppc_wait_for_nap(void) +static void kvmppc_ |