The entire DRAM region of a TVM running in CoVE must be confidential by
default. If a TVM wishes to share any sub-region, the TVM has to
request it explicitly with memory share APIs.
Mark the memory region as confidential during vm create itself.
Signed-off-by: Atish Patra <atishp@xxxxxxxxxxxx>
---
arch/riscv/kvm/mmu.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/arch/riscv/kvm/mmu.c b/arch/riscv/kvm/mmu.c
index 4b0f09e..63889d9 100644
--- a/arch/riscv/kvm/mmu.c
+++ b/arch/riscv/kvm/mmu.c
@@ -499,6 +499,11 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
mmap_read_lock(current->mm);
+ if (is_cove_vm(kvm)) {
+ ret = kvm_riscv_cove_vm_add_memreg(kvm, base_gpa, size);
+ if (ret)
+ return ret;
+ }
/*
* A memory region could potentially cover multiple VMAs, and
* any holes between them, so iterate over all of them to find
--
2.25.1
