linux-kernel - [PATCH V6 6/7] KVM: selftests: Update ucall pool to allocate from shared memory

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Message-Id: <20230110175057.715453-7-pgonda@google.com>
Date:   Tue, 10 Jan 2023 09:50:56 -0800
From:   Peter Gonda <pgonda@...gle.com>
To:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     Peter Gonda <pgonda@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        Vishal Annapurve <vannapurve@...gle.com>,
        Ackerly Tng <ackerleytng@...gle.com>,
        Andrew Jones <andrew.jones@...ux.dev>
Subject: [PATCH V6 6/7] KVM: selftests: Update ucall pool to allocate from
 shared memory

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.

Cc: Paolo Bonzini <pbonzini@...hat.com>
Cc: Sean Christopherson <seanjc@...gle.com>
Cc: Vishal Annapurve <vannapurve@...gle.com>
Cc: Ackerly Tng <ackerleytng@...gle.com>
cc: Andrew Jones <andrew.jones@...ux.dev>
Signed-off-by: Peter Gonda <pgonda@...gle.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 2f0e2ea941cc..99ef4866a001 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -24,7 +24,7 @@ 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, MEM_REGION_DATA);
+	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));
 
-- 
2.39.0.314.g84b9a713c41-goog