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2024 11:39:07 +0000 Date: Tue, 5 Mar 2024 19:09:15 +0800 From: Yan Zhao To: Sagi Shahar CC: , Ackerley Tng , Ryan Afranji , Erdem Aktas , "Isaku Yamahata" , Sean Christopherson , Paolo Bonzini , Shuah Khan , "Peter Gonda" , Haibo Xu , Chao Peng , Vishal Annapurve , Roger Wang , Vipin Sharma , , , , , Subject: Re: [RFC PATCH v5 22/29] KVM: selftests: Add functions to allow mapping as shared Message-ID: Reply-To: Yan Zhao References: <20231212204647.2170650-1-sagis@google.com> <20231212204647.2170650-23-sagis@google.com> Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20231212204647.2170650-23-sagis@google.com> X-ClientProxiedBy: SI2PR06CA0018.apcprd06.prod.outlook.com (2603:1096:4:186::8) To DS7PR11MB5966.namprd11.prod.outlook.com (2603:10b6:8:71::6) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DS7PR11MB5966:EE_|PH8PR11MB7071:EE_ X-MS-Office365-Filtering-Correlation-Id: 037e96c1-0d2e-4dfd-2c2c-08dc3d08de02 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, Dec 12, 2023 at 12:46:37PM -0800, Sagi Shahar wrote: > From: Ackerley Tng > > Signed-off-by: Ackerley Tng > Signed-off-by: Ryan Afranji > Signed-off-by: Sagi Shahar > --- > .../selftests/kvm/include/kvm_util_base.h | 24 ++++++++++++++ > tools/testing/selftests/kvm/lib/kvm_util.c | 32 +++++++++++++++++++ > .../selftests/kvm/lib/x86_64/processor.c | 15 +++++++-- > 3 files changed, 69 insertions(+), 2 deletions(-) > > diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h > index b353617fcdd1..efd7ae8abb20 100644 > --- a/tools/testing/selftests/kvm/include/kvm_util_base.h > +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h > @@ -574,6 +574,8 @@ vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm); > > void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > unsigned int npages); > +void virt_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > + unsigned int npages); > void *addr_gpa2hva(struct kvm_vm *vm, vm_paddr_t gpa); > void *addr_gva2hva(struct kvm_vm *vm, vm_vaddr_t gva); > vm_paddr_t addr_hva2gpa(struct kvm_vm *vm, void *hva); > @@ -1034,6 +1036,28 @@ static inline void virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr > virt_arch_pg_map(vm, vaddr, paddr); > } > > +/* > + * VM Virtual Page Map as Shared > + * > + * Input Args: > + * vm - Virtual Machine > + * vaddr - VM Virtual Address > + * paddr - VM Physical Address > + * memslot - Memory region slot for new virtual translation tables > + * > + * Output Args: None > + * > + * Return: None > + * > + * Within @vm, creates a virtual translation for the page starting > + * at @vaddr to the page starting at @paddr. > + */ > +void virt_arch_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr); > + > +static inline void virt_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) > +{ > + virt_arch_pg_map_shared(vm, vaddr, paddr); > +} > > /* > * Address Guest Virtual to Guest Physical > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c > index 4f1ae0f1eef0..28780fa1f0f2 100644 > --- a/tools/testing/selftests/kvm/lib/kvm_util.c > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c > @@ -1573,6 +1573,38 @@ void virt_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > } > } > > +/* > + * Map a range of VM virtual address to the VM's physical address as shared > + * > + * Input Args: > + * vm - Virtual Machine > + * vaddr - Virtuall address to map > + * paddr - VM Physical Address > + * npages - The number of pages to map > + * > + * Output Args: None > + * > + * Return: None > + * > + * Within the VM given by @vm, creates a virtual translation for > + * @npages starting at @vaddr to the page range starting at @paddr. > + */ > +void virt_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > + unsigned int npages) > +{ > + size_t page_size = vm->page_size; > + size_t size = npages * page_size; > + > + TEST_ASSERT(vaddr + size > vaddr, "Vaddr overflow"); > + TEST_ASSERT(paddr + size > paddr, "Paddr overflow"); > + > + while (npages--) { > + virt_pg_map_shared(vm, vaddr, paddr); > + vaddr += page_size; > + paddr += page_size; > + } > +} Set vm->vpages_mapped as what's done in virt_map() ? > + > /* > * Address VM Physical to Host Virtual > * > diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c > index 566d82829da4..aa2a57ddb8d3 100644 > --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c > +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c > @@ -190,7 +190,8 @@ static uint64_t *virt_create_upper_pte(struct kvm_vm *vm, > return pte; > } > > -void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) > +static void ___virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > + int level, bool protected) > { > const uint64_t pg_size = PG_LEVEL_SIZE(level); > uint64_t *pml4e, *pdpe, *pde; > @@ -235,17 +236,27 @@ void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) > "PTE already present for 4k page at vaddr: 0x%lx\n", vaddr); > *pte = PTE_PRESENT_MASK | PTE_WRITABLE_MASK | (paddr & PHYSICAL_PAGE_MASK); > > - if (vm_is_gpa_protected(vm, paddr)) > + if (protected) > *pte |= vm->arch.c_bit; > else > *pte |= vm->arch.s_bit; > } > > +void __virt_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, int level) > +{ > + ___virt_pg_map(vm, vaddr, paddr, level, vm_is_gpa_protected(vm, paddr)); > +} > + > void virt_arch_pg_map(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) > { > __virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K); > } > > +void virt_arch_pg_map_shared(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr) > +{ > + ___virt_pg_map(vm, vaddr, paddr, PG_LEVEL_4K, false); > +} > + > void virt_map_level(struct kvm_vm *vm, uint64_t vaddr, uint64_t paddr, > uint64_t nr_bytes, int level) > { > -- > 2.43.0.472.g3155946c3a-goog > >