[RFC PATCH 03/31] Add vm_vaddr_alloc_pages_shared()

[Neeraj Upadhyay]

From: Peter Gonda <pgo...@google.com>

Add a shared page allocation. To be used for SEV-ES GHCBs.

Cc: Vishal Annapurve <vannapu...@google.com>
Cc: Ackerley Tng <ackerley...@google.com>
Cc: Paolo Bonzini <pbonz...@redhat.com>
Cc: Claudio Imbrenda <imbre...@linux.ibm.com>
Cc: Sean Christopherson <sea...@google.com>
Cc: Carlos Bilbao <carlos.bil...@amd.com>
Cc: Tom Lendacky <thomas.lenda...@amd.com>
Cc: Michael Roth <michael.r...@amd.com>
Cc: k...@vger.kernel.org
Cc: linux-kselft...@vger.kernel.org
Signed-off-by: Peter Gonda <pgo...@google.com>
Signed-off-by: Neeraj Upadhyay <neeraj.upadh...@amd.com>
---
 tools/testing/selftests/kvm/include/kvm_util.h | 1 +
 tools/testing/selftests/kvm/lib/kvm_util.c     | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/kvm_util.h 
b/tools/testing/selftests/kvm/include/kvm_util.h
index b621a0f1907e..bd963ff49bf0 100644
--- a/tools/testing/selftests/kvm/include/kvm_util.h
+++ b/tools/testing/selftests/kvm/include/kvm_util.h
@@ -605,6 +605,7 @@ 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_pages_shared(struct kvm_vm *vm, int nr_pages);
 vm_vaddr_t __vm_vaddr_alloc_page(struct kvm_vm *vm,
                                 enum kvm_mem_region_type type);
 vm_vaddr_t vm_vaddr_alloc_page(struct kvm_vm *vm);
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c 
b/tools/testing/selftests/kvm/lib/kvm_util.c
index 18a44d8220ef..4f3240976f6c 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -1470,6 +1470,12 @@ vm_vaddr_t vm_vaddr_alloc_pages(struct kvm_vm *vm, int 
nr_pages)
        return vm_vaddr_alloc(vm, nr_pages * getpagesize(), KVM_UTIL_MIN_VADDR);
 }
 
+vm_vaddr_t vm_vaddr_alloc_pages_shared(struct kvm_vm *vm, int nr_pages)
+{
+       return vm_vaddr_alloc_shared(vm, nr_pages * getpagesize(),
+                                    KVM_UTIL_MIN_VADDR, MEM_REGION_TEST_DATA);
+}
+
 vm_vaddr_t __vm_vaddr_alloc_page(struct kvm_vm *vm, enum kvm_mem_region_type 
type)
 {
        return __vm_vaddr_alloc(vm, getpagesize(), KVM_UTIL_MIN_VADDR, type);
-- 
2.34.1