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Date:   Mon, 6 Nov 2023 15:26:44 +0100
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Subject: Re: [PATCH 31/34] KVM: selftests: Expand set_memory_region_test to
 validate guest_memfd()
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To:     Marc Zyngier <maz@kernel.org>,
        Oliver Upton <oliver.upton@linux.dev>,
        Huacai Chen <chenhuacai@kernel.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Anup Patel <anup@brainfault.org>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Sean Christopherson <seanjc@google.com>,
        Alexander Viro <viro@zeniv.linux.org.uk>,
        Christian Brauner <brauner@kernel.org>,
        "Matthew Wilcox (Oracle)" <willy@infradead.org>,
        Andrew Morton <akpm@linux-foundation.org>
Cc:     kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        kvmarm@lists.linux.dev, linux-mips@vger.kernel.org,
        linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org,
        linux-riscv@lists.infradead.org, linux-fsdevel@vger.kernel.org,
        linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Xiaoyao Li <xiaoyao.li@intel.com>,
        Xu Yilun <yilun.xu@intel.com>,
        Chao Peng <chao.p.peng@linux.intel.com>,
        Fuad Tabba <tabba@google.com>,
        Jarkko Sakkinen <jarkko@kernel.org>,
        Anish Moorthy <amoorthy@google.com>,
        David Matlack <dmatlack@google.com>,
        Yu Zhang <yu.c.zhang@linux.intel.com>,
        Isaku Yamahata <isaku.yamahata@intel.com>,
        =?UTF-8?B?TWlja2HDq2wgU2FsYcO8?= =?UTF-8?Q?n?= <mic@digikod.net>,
        Vlastimil Babka <vbabka@suse.cz>,
        Vishal Annapurve <vannapurve@google.com>,
        Ackerley Tng <ackerleytng@google.com>,
        Maciej Szmigiero <mail@maciej.szmigiero.name>,
        David Hildenbrand <david@redhat.com>,
        Quentin Perret <qperret@google.com>,
        Michael Roth <michael.roth@amd.com>,
        Wang <wei.w.wang@intel.com>,
        Liam Merwick <liam.merwick@oracle.com>,
        Isaku Yamahata <isaku.yamahata@gmail.com>,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
References: <20231105163040.14904-1-pbonzini@redhat.com>
 <20231105163040.14904-32-pbonzini@redhat.com>
From:   Paolo Bonzini <pbonzini@redhat.com>
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In-Reply-To: <20231105163040.14904-32-pbonzini@redhat.com>
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On 11/5/23 17:30, Paolo Bonzini wrote:
> From: Chao Peng <chao.p.peng@linux.intel.com>
> 
> Expand set_memory_region_test to exercise various positive and negative
> testcases for private memory.
> 
>   - Non-guest_memfd() file descriptor for private memory
>   - guest_memfd() from different VM
>   - Overlapping bindings
>   - Unaligned bindings

This needs a small fixup:

diff --git a/tools/testing/selftests/kvm/include/kvm_util_base.h b/tools/testing/selftests/kvm/include/kvm_util_base.h
index e4d2cd9218b2..1b58f943562f 100644
--- a/tools/testing/selftests/kvm/include/kvm_util_base.h
+++ b/tools/testing/selftests/kvm/include/kvm_util_base.h
@@ -819,6 +819,7 @@ static inline struct kvm_vm *vm_create_barebones(void)
  	return ____vm_create(VM_SHAPE_DEFAULT);
  }
  
+#ifdef __x86_64__
  static inline struct kvm_vm *vm_create_barebones_protected_vm(void)
  {
  	const struct vm_shape shape = {
@@ -828,6 +829,7 @@ static inline struct kvm_vm *vm_create_barebones_protected_vm(void)
  
  	return ____vm_create(shape);
  }
+#endif
  
  static inline struct kvm_vm *vm_create(uint32_t nr_runnable_vcpus)
  {
diff --git a/tools/testing/selftests/kvm/set_memory_region_test.c b/tools/testing/selftests/kvm/set_memory_region_test.c
index 1891774eb6d4..302c7a46955b 100644
--- a/tools/testing/selftests/kvm/set_memory_region_test.c
+++ b/tools/testing/selftests/kvm/set_memory_region_test.c
@@ -386,6 +386,7 @@ static void test_add_max_memory_regions(void)
  }
  
  
+#ifdef __x86_64__
  static void test_invalid_guest_memfd(struct kvm_vm *vm, int memfd,
  				     size_t offset, const char *msg)
  {
@@ -476,14 +477,13 @@ static void test_add_overlapping_private_memory_regions(void)
  	close(memfd);
  	kvm_vm_free(vm);
  }
+#endif
  
  int main(int argc, char *argv[])
  {
  #ifdef __x86_64__
  	int i, loops;
-#endif
  
-#ifdef __x86_64__
  	/*
  	 * FIXME: the zero-memslot test fails on aarch64 and s390x because
  	 * KVM_RUN fails with ENOEXEC or EFAULT.
@@ -493,6 +493,7 @@ int main(int argc, char *argv[])
  
  	test_add_max_memory_regions();
  
+#ifdef __x86_64__
  	if (kvm_has_cap(KVM_CAP_GUEST_MEMFD) &&
  	    (kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM))) {
  		test_add_private_memory_region();
@@ -501,7 +502,6 @@ int main(int argc, char *argv[])
  		pr_info("Skipping tests for KVM_MEM_GUEST_MEMFD memory regions\n");
  	}
  
-#ifdef __x86_64__
  	if (argc > 1)
  		loops = atoi_positive("Number of iterations", argv[1]);
  	else

in order to compile successfully on non-x86 platforms.