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[94.39.199.114]) by mx.google.com with ESMTPSA id bm9sm17024308wjc.21.2015.05.18.06.49.18 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 18 May 2015 06:49:20 -0700 (PDT) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Xiao Guangrong , rkrcmar@redhat.com, bdas@redhat.com Subject: [PATCH 09/11] KVM: x86: use vcpu-specific functions to read/write/translate GFNs Date: Mon, 18 May 2015 15:48:41 +0200 Message-Id: <1431956923-35602-10-git-send-email-pbonzini@redhat.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1431956923-35602-1-git-send-email-pbonzini@redhat.com> References: <1431956923-35602-1-git-send-email-pbonzini@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Spam-Status: No, score=-6.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID,T_RP_MATCHES_RCVD,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We need to hide SMRAM from guests not running in SMM. Therefore, all uses of kvm_read_guest* and kvm_write_guest* must be changed to check whether the VCPU is in system management mode and use a different set of memslots. Switch from kvm_* to the newly-introduced kvm_vcpu_*, which call into kvm_arch_vcpu_memslots. For now, the code is just copied from virt/kvm/kvm_main.c, except for calls to other read/write functions. Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/mmu.c | 36 ++++++++++++++++++------------------ arch/x86/kvm/paging_tmpl.h | 14 +++++++------- arch/x86/kvm/svm.c | 10 +++++----- arch/x86/kvm/vmx.c | 22 +++++++++++----------- arch/x86/kvm/x86.c | 26 +++++++++++++------------- 6 files changed, 55 insertions(+), 55 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index b872bad8855e..71232ccc8fe4 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -885,7 +885,7 @@ void kvm_mmu_clear_dirty_pt_masked(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn_offset, unsigned long mask); void kvm_mmu_zap_all(struct kvm *kvm); -void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm); +void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, struct kvm_memslots *slots); unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm); void kvm_mmu_change_mmu_pages(struct kvm *kvm, unsigned int kvm_nr_mmu_pages); diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index 817ae3ece05c..7eff9d249f39 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -223,15 +223,15 @@ static unsigned int get_mmio_spte_generation(u64 spte) return gen; } -static unsigned int kvm_current_mmio_generation(struct kvm *kvm) +static unsigned int kvm_current_mmio_generation(struct kvm_vcpu *vcpu) { - return kvm_memslots(kvm)->generation & MMIO_GEN_MASK; + return kvm_vcpu_memslots(vcpu)->generation & MMIO_GEN_MASK; } -static void mark_mmio_spte(struct kvm *kvm, u64 *sptep, u64 gfn, +static void mark_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, u64 gfn, unsigned access) { - unsigned int gen = kvm_current_mmio_generation(kvm); + unsigned int gen = kvm_current_mmio_generation(vcpu); u64 mask = generation_mmio_spte_mask(gen); access &= ACC_WRITE_MASK | ACC_USER_MASK; @@ -258,22 +258,22 @@ static unsigned get_mmio_spte_access(u64 spte) return (spte & ~mask) & ~PAGE_MASK; } -static bool set_mmio_spte(struct kvm *kvm, u64 *sptep, gfn_t gfn, +static bool set_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn, pfn_t pfn, unsigned access) { if (unlikely(is_noslot_pfn(pfn))) { - mark_mmio_spte(kvm, sptep, gfn, access); + mark_mmio_spte(vcpu, sptep, gfn, access); return true; } return false; } -static bool check_mmio_spte(struct kvm *kvm, u64 spte) +static bool check_mmio_spte(struct kvm_vcpu *vcpu, u64 spte) { unsigned int kvm_gen, spte_gen; - kvm_gen = kvm_current_mmio_generation(kvm); + kvm_gen = kvm_current_mmio_generation(vcpu); spte_gen = get_mmio_spte_generation(spte); trace_check_mmio_spte(spte, kvm_gen, spte_gen); @@ -872,7 +872,7 @@ gfn_to_memslot_dirty_bitmap(struct kvm_vcpu *vcpu, gfn_t gfn, { struct kvm_memory_slot *slot; - slot = gfn_to_memslot(vcpu->kvm, gfn); + slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); if (!slot || slot->flags & KVM_MEMSLOT_INVALID || (no_dirty_log && slot->dirty_bitmap)) slot = NULL; @@ -2577,7 +2577,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep, u64 spte; int ret = 0; - if (set_mmio_spte(vcpu->kvm, sptep, gfn, pfn, pte_access)) + if (set_mmio_spte(vcpu, sptep, gfn, pfn, pte_access)) return 0; spte = PT_PRESENT_MASK; @@ -3424,7 +3424,7 @@ int handle_mmio_page_fault_common(struct kvm_vcpu *vcpu, u64 addr, bool direct) gfn_t gfn = get_mmio_spte_gfn(spte); unsigned access = get_mmio_spte_access(spte); - if (!check_mmio_spte(vcpu->kvm, spte)) + if (!check_mmio_spte(vcpu, spte)) return RET_MMIO_PF_INVALID; if (direct) @@ -3496,7 +3496,7 @@ static int kvm_arch_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn) arch.direct_map = vcpu->arch.mmu.direct_map; arch.cr3 = vcpu->arch.mmu.get_cr3(vcpu); - return kvm_setup_async_pf(vcpu, gva, gfn_to_hva(vcpu->kvm, gfn), &arch); + return kvm_setup_async_pf(vcpu, gva, kvm_vcpu_gfn_to_hva(vcpu, gfn), &arch); } static bool can_do_async_pf(struct kvm_vcpu *vcpu) @@ -3514,7 +3514,7 @@ static bool try_async_pf(struct kvm_vcpu *vcpu, bool prefault, gfn_t gfn, struct kvm_memory_slot *slot; bool async; - slot = gfn_to_memslot(vcpu->kvm, gfn); + slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); async = false; *pfn = __gfn_to_pfn_memslot(slot, gfn, false, &async, write, writable); if (!async) @@ -3627,7 +3627,7 @@ static void inject_page_fault(struct kvm_vcpu *vcpu, vcpu->arch.mmu.inject_page_fault(vcpu, fault); } -static bool sync_mmio_spte(struct kvm *kvm, u64 *sptep, gfn_t gfn, +static bool sync_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn, unsigned access, int *nr_present) { if (unlikely(is_mmio_spte(*sptep))) { @@ -3637,7 +3637,7 @@ static bool sync_mmio_spte(struct kvm *kvm, u64 *sptep, gfn_t gfn, } (*nr_present)++; - mark_mmio_spte(kvm, sptep, gfn, access); + mark_mmio_spte(vcpu, sptep, gfn, access); return true; } @@ -4147,7 +4147,7 @@ static u64 mmu_pte_write_fetch_gpte(struct kvm_vcpu *vcpu, gpa_t *gpa, /* Handle a 32-bit guest writing two halves of a 64-bit gpte */ *gpa &= ~(gpa_t)7; *bytes = 8; - r = kvm_read_guest(vcpu->kvm, *gpa, &gentry, 8); + r = kvm_vcpu_read_guest(vcpu, *gpa, &gentry, 8); if (r) gentry = 0; new = (const u8 *)&gentry; @@ -4773,13 +4773,13 @@ static bool kvm_has_zapped_obsolete_pages(struct kvm *kvm) return unlikely(!list_empty_careful(&kvm->arch.zapped_obsolete_pages)); } -void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm) +void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm, struct kvm_memslots *slots) { /* * The very rare case: if the generation-number is round, * zap all shadow pages. */ - if (unlikely(kvm_current_mmio_generation(kvm) == 0)) { + if (unlikely((slots->generation & MMIO_GEN_MASK) == 0)) { printk_ratelimited(KERN_DEBUG "kvm: zapping shadow pages for mmio generation wraparound\n"); kvm_mmu_invalidate_zap_all_pages(kvm); } diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h index 6e6d115fe9b5..8a6c582db4b1 100644 --- a/arch/x86/kvm/paging_tmpl.h +++ b/arch/x86/kvm/paging_tmpl.h @@ -511,11 +511,11 @@ static bool FNAME(gpte_changed)(struct kvm_vcpu *vcpu, base_gpa = pte_gpa & ~mask; index = (pte_gpa - base_gpa) / sizeof(pt_element_t); - r = kvm_read_guest_atomic(vcpu->kvm, base_gpa, + r = kvm_vcpu_read_guest_atomic(vcpu, base_gpa, gw->prefetch_ptes, sizeof(gw->prefetch_ptes)); curr_pte = gw->prefetch_ptes[index]; } else - r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, + r = kvm_vcpu_read_guest_atomic(vcpu, pte_gpa, &curr_pte, sizeof(curr_pte)); return r || curr_pte != gw->ptes[level - 1]; @@ -869,8 +869,8 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva) if (!rmap_can_add(vcpu)) break; - if (kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &gpte, - sizeof(pt_element_t))) + if (kvm_vcpu_read_guest_atomic(vcpu, pte_gpa, &gpte, + sizeof(pt_element_t))) break; FNAME(update_pte)(vcpu, sp, sptep, &gpte); @@ -956,8 +956,8 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) pte_gpa = first_pte_gpa + i * sizeof(pt_element_t); - if (kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &gpte, - sizeof(pt_element_t))) + if (kvm_vcpu_read_guest_atomic(vcpu, pte_gpa, &gpte, + sizeof(pt_element_t))) return -EINVAL; if (FNAME(prefetch_invalid_gpte)(vcpu, sp, &sp->spt[i], gpte)) { @@ -970,7 +970,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) pte_access &= FNAME(gpte_access)(vcpu, gpte); FNAME(protect_clean_gpte)(&pte_access, gpte); - if (sync_mmio_spte(vcpu->kvm, &sp->spt[i], gfn, pte_access, + if (sync_mmio_spte(vcpu, &sp->spt[i], gfn, pte_access, &nr_present)) continue; diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 6afffb82513c..ce22872cfad6 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -1955,8 +1955,8 @@ static u64 nested_svm_get_tdp_pdptr(struct kvm_vcpu *vcpu, int index) u64 pdpte; int ret; - ret = kvm_read_guest_page(vcpu->kvm, gpa_to_gfn(cr3), &pdpte, - offset_in_page(cr3) + index * 8, 8); + ret = kvm_vcpu_read_guest_page(vcpu, gpa_to_gfn(cr3), &pdpte, + offset_in_page(cr3) + index * 8, 8); if (ret) return 0; return pdpte; @@ -2153,7 +2153,7 @@ static int nested_svm_intercept_ioio(struct vcpu_svm *svm) mask = (0xf >> (4 - size)) << start_bit; val = 0; - if (kvm_read_guest(svm->vcpu.kvm, gpa, &val, iopm_len)) + if (kvm_vcpu_read_guest(&svm->vcpu, gpa, &val, iopm_len)) return NESTED_EXIT_DONE; return (val & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; @@ -2178,7 +2178,7 @@ static int nested_svm_exit_handled_msr(struct vcpu_svm *svm) /* Offset is in 32 bit units but need in 8 bit units */ offset *= 4; - if (kvm_read_guest(svm->vcpu.kvm, svm->nested.vmcb_msrpm + offset, &value, 4)) + if (kvm_vcpu_read_guest(&svm->vcpu, svm->nested.vmcb_msrpm + offset, &value, 4)) return NESTED_EXIT_DONE; return (value & mask) ? NESTED_EXIT_DONE : NESTED_EXIT_HOST; @@ -2449,7 +2449,7 @@ static bool nested_svm_vmrun_msrpm(struct vcpu_svm *svm) p = msrpm_offsets[i]; offset = svm->nested.vmcb_msrpm + (p * 4); - if (kvm_read_guest(svm->vcpu.kvm, offset, &value, 4)) + if (kvm_vcpu_read_guest(&svm->vcpu, offset, &value, 4)) return false; svm->nested.msrpm[p] = svm->msrpm[p] | value; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 9904aed78c72..c9eab7440c73 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -7323,7 +7323,7 @@ static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu, bitmap += (port & 0x7fff) / 8; if (last_bitmap != bitmap) - if (kvm_read_guest(vcpu->kvm, bitmap, &b, 1)) + if (kvm_vcpu_read_guest(vcpu, bitmap, &b, 1)) return true; if (b & (1 << (port & 7))) return true; @@ -7367,7 +7367,7 @@ static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu, /* Then read the msr_index'th bit from this bitmap: */ if (msr_index < 1024*8) { unsigned char b; - if (kvm_read_guest(vcpu->kvm, bitmap + msr_index/8, &b, 1)) + if (kvm_vcpu_read_guest(vcpu, bitmap + msr_index/8, &b, 1)) return true; return 1 & (b >> (msr_index & 7)); } else @@ -9109,8 +9109,8 @@ static u32 nested_vmx_load_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) msr.host_initiated = false; for (i = 0; i < count; i++) { - if (kvm_read_guest(vcpu->kvm, gpa + i * sizeof(e), - &e, sizeof(e))) { + if (kvm_vcpu_read_guest(vcpu, gpa + i * sizeof(e), + &e, sizeof(e))) { pr_warn_ratelimited( "%s cannot read MSR entry (%u, 0x%08llx)\n", __func__, i, gpa + i * sizeof(e)); @@ -9143,9 +9143,9 @@ static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) for (i = 0; i < count; i++) { struct msr_data msr_info; - if (kvm_read_guest(vcpu->kvm, - gpa + i * sizeof(e), - &e, 2 * sizeof(u32))) { + if (kvm_vcpu_read_guest(vcpu, + gpa + i * sizeof(e), + &e, 2 * sizeof(u32))) { pr_warn_ratelimited( "%s cannot read MSR entry (%u, 0x%08llx)\n", __func__, i, gpa + i * sizeof(e)); @@ -9165,10 +9165,10 @@ static int nested_vmx_store_msr(struct kvm_vcpu *vcpu, u64 gpa, u32 count) __func__, i, e.index); return -EINVAL; } - if (kvm_write_guest(vcpu->kvm, - gpa + i * sizeof(e) + - offsetof(struct vmx_msr_entry, value), - &msr_info.data, sizeof(msr_info.data))) { + if (kvm_vcpu_write_guest(vcpu, + gpa + i * sizeof(e) + + offsetof(struct vmx_msr_entry, value), + &msr_info.data, sizeof(msr_info.data))) { pr_warn_ratelimited( "%s cannot write MSR (%u, 0x%x, 0x%llx)\n", __func__, i, e.index, msr_info.data); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 753cf20c0ec5..0b6192fc348a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -475,7 +475,7 @@ EXPORT_SYMBOL_GPL(kvm_require_dr); /* * This function will be used to read from the physical memory of the currently - * running guest. The difference to kvm_read_guest_page is that this function + * running guest. The difference to kvm_vcpu_read_guest_page is that this function * can read from guest physical or from the guest's guest physical memory. */ int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, @@ -493,7 +493,7 @@ int kvm_read_guest_page_mmu(struct kvm_vcpu *vcpu, struct kvm_mmu *mmu, real_gfn = gpa_to_gfn(real_gfn); - return kvm_read_guest_page(vcpu->kvm, real_gfn, data, offset, len); + return kvm_vcpu_read_guest_page(vcpu, real_gfn, data, offset, len); } EXPORT_SYMBOL_GPL(kvm_read_guest_page_mmu); @@ -2022,7 +2022,7 @@ static int xen_hvm_config(struct kvm_vcpu *vcpu, u64 data) r = PTR_ERR(page); goto out; } - if (kvm_write_guest(kvm, page_addr, page, PAGE_SIZE)) + if (kvm_vcpu_write_guest(vcpu, page_addr, page, PAGE_SIZE)) goto out_free; r = 0; out_free: @@ -2122,7 +2122,7 @@ static int set_msr_hyperv(struct kvm_vcpu *vcpu, u32 msr, u64 data) break; } gfn = data >> HV_X64_MSR_APIC_ASSIST_PAGE_ADDRESS_SHIFT; - addr = gfn_to_hva(vcpu->kvm, gfn); + addr = kvm_vcpu_gfn_to_hva(vcpu, gfn); if (kvm_is_error_hva(addr)) return 1; if (__clear_user((void __user *)addr, PAGE_SIZE)) @@ -4409,8 +4409,8 @@ static int kvm_read_guest_virt_helper(gva_t addr, void *val, unsigned int bytes, if (gpa == UNMAPPED_GVA) return X86EMUL_PROPAGATE_FAULT; - ret = kvm_read_guest_page(vcpu->kvm, gpa >> PAGE_SHIFT, data, - offset, toread); + ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, data, + offset, toread); if (ret < 0) { r = X86EMUL_IO_NEEDED; goto out; @@ -4443,8 +4443,8 @@ static int kvm_fetch_guest_virt(struct x86_emulate_ctxt *ctxt, offset = addr & (PAGE_SIZE-1); if (WARN_ON(offset + bytes > PAGE_SIZE)) bytes = (unsigned)PAGE_SIZE - offset; - ret = kvm_read_guest_page(vcpu->kvm, gpa >> PAGE_SHIFT, val, - offset, bytes); + ret = kvm_vcpu_read_guest_page(vcpu, gpa >> PAGE_SHIFT, val, + offset, bytes); if (unlikely(ret < 0)) return X86EMUL_IO_NEEDED; @@ -4490,7 +4490,7 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, if (gpa == UNMAPPED_GVA) return X86EMUL_PROPAGATE_FAULT; - ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); + ret = kvm_vcpu_write_guest(vcpu, gpa, data, towrite); if (ret < 0) { r = X86EMUL_IO_NEEDED; goto out; @@ -4543,7 +4543,7 @@ int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, { int ret; - ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); + ret = kvm_vcpu_write_guest(vcpu, gpa, val, bytes); if (ret < 0) return 0; kvm_mmu_pte_write(vcpu, gpa, val, bytes); @@ -4577,7 +4577,7 @@ static int read_prepare(struct kvm_vcpu *vcpu, void *val, int bytes) static int read_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, void *val, int bytes) { - return !kvm_read_guest(vcpu->kvm, gpa, val, bytes); + return !kvm_vcpu_read_guest(vcpu, gpa, val, bytes); } static int write_emulate(struct kvm_vcpu *vcpu, gpa_t gpa, @@ -6544,7 +6544,7 @@ static void process_smi(struct kvm_vcpu *vcpu) else process_smi_save_state_32(vcpu, buf); - r = kvm_write_guest(vcpu->kvm, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); + r = kvm_vcpu_write_guest(vcpu, vcpu->arch.smbase + 0xfe00, buf, sizeof(buf)); if (r < 0) return; @@ -8034,7 +8034,7 @@ void kvm_arch_memslots_updated(struct kvm *kvm, struct kvm_memslots *slots) * memslots->generation has been incremented. * mmio generation may have reached its maximum value. */ - kvm_mmu_invalidate_mmio_sptes(kvm); + kvm_mmu_invalidate_mmio_sptes(kvm, slots); } int kvm_arch_prepare_memory_region(struct kvm *kvm,