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Date:   Mon, 29 Aug 2022 10:10:20 -0700
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Subject: [V4 7/8] KVM: selftests: Update ucall pool to allocate from shared memory
From:   Peter Gonda <pgonda@google.com>
To:     kvm@vger.kernel.org
Cc:     linux-kernel@vger.kernel.org, marcorr@google.com,
        seanjc@google.com, michael.roth@amd.com, thomas.lendacky@amd.com,
        joro@8bytes.org, mizhang@google.com, pbonzini@redhat.com,
        andrew.jones@linux.dev, Peter Gonda <pgonda@google.com>
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Precedence: bulk

Update the per VM ucall_header allocation from vm_vaddr_alloc() to
vm_vaddr_alloc_shared(). This allows encrypted guests to use ucall pools
by placing their shared ucall structures in unencrypted (shared) memory.
No behavior change for non encrypted guests.

Signed-off-by: Peter Gonda <pgonda@google.com>
---
 tools/testing/selftests/kvm/lib/ucall_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
index cc79d497b6b4..8e164c47e2fb 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -22,7 +22,7 @@ void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa)
 	vm_vaddr_t vaddr;
 	int i;
 
-	vaddr = vm_vaddr_alloc(vm, sizeof(*hdr), KVM_UTIL_MIN_VADDR);
+	vaddr = vm_vaddr_alloc_shared(vm, sizeof(*hdr), KVM_UTIL_MIN_VADDR);
 	hdr = (struct ucall_header *)addr_gva2hva(vm, vaddr);
 	memset(hdr, 0, sizeof(*hdr));
 
-- 
2.37.2.672.g94769d06f0-goog