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Violators will be prosecuted for from ; Mon, 22 Oct 2018 06:18:59 +0100 From: Bharata B Rao Subject: [RFC PATCH v1 3/4] kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls Date: Mon, 22 Oct 2018 10:48:36 +0530 In-Reply-To: <20181022051837.1165-1-bharata@linux.ibm.com> References: <20181022051837.1165-1-bharata@linux.ibm.com> Message-Id: <20181022051837.1165-4-bharata@linux.ibm.com> Sender: owner-linux-mm@kvack.org List-ID: To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, benh@linux.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, Bharata B Rao H_SVM_INIT_START: Initiate securing a VM H_SVM_INIT_DONE: Conclude securing a VM During early guest init, these hcalls will be issued by UV. As part of these hcalls, [un]register memslots with UV. Signed-off-by: Bharata B Rao --- arch/powerpc/include/asm/hvcall.h | 4 ++- arch/powerpc/include/asm/kvm_host.h | 1 + arch/powerpc/include/asm/ucall-api.h | 6 ++++ arch/powerpc/kvm/book3s_hv.c | 54 ++++++++++++++++++++++++++++ 4 files changed, 64 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 89e6b70c1857..6091276fef07 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -300,7 +300,9 @@ #define H_INT_RESET 0x3D0 #define H_SVM_PAGE_IN 0x3D4 #define H_SVM_PAGE_OUT 0x3D8 -#define MAX_HCALL_OPCODE H_SVM_PAGE_OUT +#define H_SVM_INIT_START 0x3DC +#define H_SVM_INIT_DONE 0x3E0 +#define MAX_HCALL_OPCODE H_SVM_INIT_DONE /* H_VIOCTL functions */ #define H_GET_VIOA_DUMP_SIZE 0x01 diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h index 194e6e0ff239..267f8c568bc3 100644 --- a/arch/powerpc/include/asm/kvm_host.h +++ b/arch/powerpc/include/asm/kvm_host.h @@ -292,6 +292,7 @@ struct kvm_arch { struct dentry *debugfs_dir; struct dentry *htab_dentry; struct kvm_resize_hpt *resize_hpt; /* protected by kvm->lock */ + bool svm_init_start; /* Indicates H_SVM_INIT_START has been called */ #endif /* CONFIG_KVM_BOOK3S_HV_POSSIBLE */ #ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE struct mutex hpt_mutex; diff --git a/arch/powerpc/include/asm/ucall-api.h b/arch/powerpc/include/asm/ucall-api.h index 2c12f514f8ab..9ddfcf541211 100644 --- a/arch/powerpc/include/asm/ucall-api.h +++ b/arch/powerpc/include/asm/ucall-api.h @@ -17,4 +17,10 @@ static inline int uv_page_out(u64 lpid, u64 dw0, u64 dw1, u64 dw2, u64 dw3) return U_SUCCESS; } +static inline int uv_register_mem_slot(u64 lpid, u64 dw0, u64 dw1, u64 dw2, + u64 dw3) +{ + return 0; +} + #endif /* _ASM_POWERPC_UCALL_API_H */ diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 05084eb8aadd..47f366f634fd 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -819,6 +819,50 @@ static int kvmppc_get_yield_count(struct kvm_vcpu *vcpu) return yield_count; } +#ifdef CONFIG_PPC_SVM +#include +/* + * TODO: Check if memslots related calls here need to be called + * under any lock. + */ +static unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) +{ + struct kvm_memslots *slots; + struct kvm_memory_slot *memslot; + int ret; + + slots = kvm_memslots(kvm); + kvm_for_each_memslot(memslot, slots) { + ret = uv_register_mem_slot(kvm->arch.lpid, + memslot->base_gfn << PAGE_SHIFT, + memslot->npages * PAGE_SIZE, + 0, memslot->id); + if (ret < 0) + return H_PARAMETER; + } + kvm->arch.svm_init_start = true; + return H_SUCCESS; +} + +static unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) +{ + if (kvm->arch.svm_init_start) + return H_SUCCESS; + else + return H_UNSUPPORTED; +} +#else +static unsigned long kvmppc_h_svm_init_start(struct kvm *kvm) +{ + return H_UNSUPPORTED; +} + +static unsigned long kvmppc_h_svm_init_done(struct kvm *kvm) +{ + return H_UNSUPPORTED; +} +#endif + int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) { unsigned long req = kvmppc_get_gpr(vcpu, 3); @@ -950,6 +994,12 @@ int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu) kvmppc_get_gpr(vcpu, 6), kvmppc_get_gpr(vcpu, 7)); break; + case H_SVM_INIT_START: + ret = kvmppc_h_svm_init_start(vcpu->kvm); + break; + case H_SVM_INIT_DONE: + ret = kvmppc_h_svm_init_done(vcpu->kvm); + break; default: return RESUME_HOST; } @@ -978,6 +1028,8 @@ static int kvmppc_hcall_impl_hv(unsigned long cmd) #endif case H_SVM_PAGE_IN: case H_SVM_PAGE_OUT: + case H_SVM_INIT_START: + case H_SVM_INIT_DONE: return 1; } @@ -4413,6 +4465,8 @@ static unsigned int default_hcall_list[] = { #endif H_SVM_PAGE_IN, H_SVM_PAGE_OUT, + H_SVM_INIT_START, + H_SVM_INIT_DONE, 0 }; -- 2.17.1