TDX only supports readonly for shared memory but not for private memory.
In the view of QEMU, it has no idea whether a memslot is used as shared
memory of private. Thus just mark kvm_readonly_mem_enabled to false to
TDX VM for simplicity.
Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Acked-by: Gerd Hoffmann <kraxel@xxxxxxxxxx>
---
target/i386/kvm/tdx.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 42dbb5ce5c15..13f069171db7 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -480,6 +480,15 @@ static int tdx_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
update_tdx_cpuid_lookup_by_tdx_caps();
+ /*
+ * Set kvm_readonly_mem_allowed to false, because TDX only supports readonly
+ * memory for shared memory but not for private memory. Besides, whether a
+ * memslot is private or shared is not determined by QEMU.
+ *
+ * Thus, just mark readonly memory not supported for simplicity.
+ */
+ kvm_readonly_mem_allowed = false;
+
tdx_guest = tdx;
return 0;
}
--
2.34.1
