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From: Itaru Kitayama To: Sean Christopherson Cc: Paolo Bonzini , Marc Zyngier , Oliver Upton , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, Vishal Annapurve , Ackerley Tng , Andrew Jones , Tom Lendacky , Michael Roth , Peter Gonda Subject: Re: [PATCH v8 05/10] KVM: selftests: Add support for protected vm_vaddr_* allocations Message-ID: References: <20240203000917.376631-1-seanjc@google.com> <20240203000917.376631-6-seanjc@google.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20240203000917.376631-6-seanjc@google.com> X-Migadu-Flow: FLOW_OUT X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240214_212943_640575_2FD8209B X-CRM114-Status: GOOD ( 17.91 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Feb 02, 2024 at 04:09:11PM -0800, Sean Christopherson wrote: > From: Michael Roth > > Test programs may wish to allocate shared vaddrs for things like > sharing memory with the guest. Since protected vms will have their > memory encrypted by default an interface is needed to explicitly > request shared pages. > > Implement this by splitting the common code out from vm_vaddr_alloc() > and introducing a new vm_vaddr_alloc_shared(). > > Cc: Paolo Bonzini > Cc: Sean Christopherson > Cc: Vishal Annapurve > Cc: Ackerly Tng > cc: Andrew Jones > Cc: Tom Lendacky > Cc: Michael Roth > Signed-off-by: Michael Roth > Signed-off-by: Peter Gonda > Signed-off-by: Sean Christopherson > --- > .../selftests/kvm/include/kvm_util_base.h | 3 +++ > tools/testing/selftests/kvm/lib/kvm_util.c | 26 +++++++++++++++---- > 2 files changed, 24 insertions(+), 5 deletions(-) > > diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h > index a82149305349..cb3159af6db3 100644 > --- a/tools/testing/selftests/kvm/include/kvm_util_base.h > +++ b/tools/testing/selftests/kvm/include/kvm_util_base.h > @@ -590,6 +590,9 @@ vm_vaddr_t vm_vaddr_unused_gap(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_mi > vm_vaddr_t vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min); > vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, > enum kvm_mem_region_type type); > +vm_vaddr_t vm_vaddr_alloc_shared(struct kvm_vm *vm, size_t sz, > + vm_vaddr_t vaddr_min, > + enum kvm_mem_region_type type); > vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int nr_pages); > vm_vaddr_t __vm_vaddr_alloc_page(struct kvm_vm *vm, > enum kvm_mem_region_type type); > diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c > index ea677aa019ef..e7f4f84f2e68 100644 > --- a/tools/testing/selftests/kvm/lib/kvm_util.c > +++ b/tools/testing/selftests/kvm/lib/kvm_util.c > @@ -1431,15 +1431,17 @@ vm_vaddr_t vm_vaddr_unused_gap(struct kvm_vm *vm, size_t sz, > return pgidx_start * vm->page_size; > } > > -vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, > - enum kvm_mem_region_type type) > +static vm_vaddr_t ____vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, > + vm_vaddr_t vaddr_min, > + enum kvm_mem_region_type type, > + bool protected) > { > uint64_t pages = (sz >> vm->page_shift) + ((sz % vm->page_size) != 0); > > virt_pgd_alloc(vm); > - vm_paddr_t paddr = vm_phy_pages_alloc(vm, pages, > - KVM_UTIL_MIN_PFN * vm->page_size, > - vm->memslots[type]); > + vm_paddr_t paddr = __vm_phy_pages_alloc(vm, pages, > + KVM_UTIL_MIN_PFN * vm->page_size, > + vm->memslots[type], protected); > > /* > * Find an unused range of virtual page addresses of at least > @@ -1459,6 +1461,20 @@ vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, > return vaddr_start; > } > > +vm_vaddr_t __vm_vaddr_alloc(struct kvm_vm *vm, size_t sz, vm_vaddr_t vaddr_min, > + enum kvm_mem_region_type type) > +{ > + return ____vm_vaddr_alloc(vm, sz, vaddr_min, type, > + vm_arch_has_protected_memory(vm)); > +} > + > +vm_vaddr_t vm_vaddr_alloc_shared(struct kvm_vm *vm, size_t sz, > + vm_vaddr_t vaddr_min, > + enum kvm_mem_region_type type) > +{ > + return ____vm_vaddr_alloc(vm, sz, vaddr_min, type, false); > +} > + > /* > * VM Virtual Address Allocate > * Reviewied-by: Itaru Kitayama > -- > 2.43.0.594.gd9cf4e227d-goog > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel