diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 9556de61b1bb190dc1a40be57ecc571d10dae0af..f15713ae3f34507292d8afa3cde64f77e84248cb 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -244,6 +244,7 @@ struct kvm_arch_memory_slot { struct kvm_arch { unsigned int lpid; #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + unsigned int tlb_sets; unsigned long hpt_virt; struct revmap_entry *revmap; atomic64_t mmio_update; diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c index a4f6d5e32a8120c91f2525ee46729581313501d7..195a9fc8f81c8fc41fca8b05239948d4f28d54af 100644 --- a/arch/powerpc/kernel/asm-offsets.c +++ b/arch/powerpc/kernel/asm-offsets.c @@ -487,6 +487,7 @@ int main(void) /* book3s */ #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE + DEFINE(KVM_TLB_SETS, offsetof(struct kvm, arch.tlb_sets)); DEFINE(KVM_SDR1, offsetof(struct kvm, arch.sdr1)); DEFINE(KVM_HOST_LPID, offsetof(struct kvm, arch.host_lpid)); DEFINE(KVM_HOST_LPCR, offsetof(struct kvm, arch.host_lpcr)); diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 14eeacc823361265433fd9c506da32c7067ff4d6..0a90fa44f555aedb530d7455ac53efc039ad4a07 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -3265,8 +3265,11 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm) * Since we don't flush the TLB when tearing down a VM, * and this lpid might have previously been used, * make sure we flush on each core before running the new VM. + * On POWER9, the tlbie in mmu_partition_table_set_entry() + * does this flush for us. */ - cpumask_setall(&kvm->arch.need_tlb_flush); + if (!cpu_has_feature(CPU_FTR_ARCH_300)) + cpumask_setall(&kvm->arch.need_tlb_flush); /* Start out with the default set of hcalls enabled */ memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls, @@ -3291,6 +3294,17 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm) lpcr &= ~LPCR_VPM0; kvm->arch.lpcr = lpcr; + /* + * Work out how many sets the TLB has, for the use of + * the TLB invalidation loop in book3s_hv_rmhandlers.S. + */ + if (cpu_has_feature(CPU_FTR_ARCH_300)) + kvm->arch.tlb_sets = POWER9_TLB_SETS_HASH; /* 256 */ + else if (cpu_has_feature(CPU_FTR_ARCH_207S)) + kvm->arch.tlb_sets = POWER8_TLB_SETS; /* 512 */ + else + kvm->arch.tlb_sets = POWER7_TLB_SETS; /* 128 */ + /* * Track that we now have a HV mode VM active. This blocks secondary * CPU threads from coming online. @@ -3733,3 +3747,4 @@ module_exit(kvmppc_book3s_exit_hv); MODULE_LICENSE("GPL"); MODULE_ALIAS_MISCDEV(KVM_MINOR); MODULE_ALIAS("devname:kvm"); + diff --git a/arch/powerpc/kvm/book3s_hv_rm_mmu.c b/arch/powerpc/kvm/book3s_hv_rm_mmu.c index 59d345883d9a21656465bfc061a22e146ec921a4..378b962bcf2ea6694793070c195935da1c2d9267 100644 --- a/arch/powerpc/kvm/book3s_hv_rm_mmu.c +++ b/arch/powerpc/kvm/book3s_hv_rm_mmu.c @@ -425,13 +425,18 @@ static void do_tlbies(struct kvm *kvm, unsigned long *rbvalues, { long i; + /* + * We use the POWER9 5-operand versions of tlbie and tlbiel here. + * Since we are using RIC=0 PRS=0 R=0, and P7/P8 tlbiel ignores + * the RS field, this is backwards-compatible with P7 and P8. + */ if (global) { while (!try_lock_tlbie(&kvm->arch.tlbie_lock)) cpu_relax(); if (need_sync) asm volatile("ptesync" : : : "memory"); for (i = 0; i < npages; ++i) - asm volatile(PPC_TLBIE(%1,%0) : : + asm volatile(PPC_TLBIE_5(%0,%1,0,0,0) : : "r" (rbvalues[i]), "r" (kvm->arch.lpid)); asm volatile("eieio; tlbsync; ptesync" : : : "memory"); kvm->arch.tlbie_lock = 0; @@ -439,7 +444,8 @@ static void do_tlbies(struct kvm *kvm, unsigned long *rbvalues, if (need_sync) asm volatile("ptesync" : : : "memory"); for (i = 0; i < npages; ++i) - asm volatile("tlbiel %0" : : "r" (rbvalues[i])); + asm volatile(PPC_TLBIEL(%0,%1,0,0,0) : : + "r" (rbvalues[i]), "r" (0)); asm volatile("ptesync" : : : "memory"); } } diff --git a/arch/powerpc/kvm/book3s_hv_rmhandlers.S b/arch/powerpc/kvm/book3s_hv_rmhandlers.S index 499be609c80e4196d80a2cf6e75da64fad470702..598d8281fc05e7789b02b14e43f377a0ca382d84 100644 --- a/arch/powerpc/kvm/book3s_hv_rmhandlers.S +++ b/arch/powerpc/kvm/book3s_hv_rmhandlers.S @@ -613,12 +613,8 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300) stdcx. r7,0,r6 bne 23b /* Flush the TLB of any entries for this LPID */ - /* use arch 2.07S as a proxy for POWER8 */ -BEGIN_FTR_SECTION - li r6,512 /* POWER8 has 512 sets */ -FTR_SECTION_ELSE - li r6,128 /* POWER7 has 128 sets */ -ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_207S) + lwz r6,KVM_TLB_SETS(r9) + li r0,0 /* RS for P9 version of tlbiel */ mtctr r6 li r7,0x800 /* IS field = 0b10 */ ptesync