[PATCH v3 27/49] i386/sev: Set ms->require_guest_memfd for SNP

[Michael Roth <michael.roth@amd.com>]

SNP requires guest_memfd for private guest memory, so enable it so that
the appropriate guest_memfd backend will be available for normal RAM
regions.

Signed-off-by: Michael Roth <michael.roth@amd.com>
---
 target/i386/sev.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/target/i386/sev.c b/target/i386/sev.c
index e4deb7b41e..b06c796aae 100644
--- a/target/i386/sev.c
+++ b/target/i386/sev.c
@@ -880,6 +880,7 @@ out:
 static int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
 {
     SevCommonState *sev_common = SEV_COMMON(cgs);
+    MachineState *ms = MACHINE(qdev_get_machine());
     char *devname;
     int ret, fw_error, cmd;
     uint32_t ebx;
@@ -1000,6 +1001,10 @@ static int sev_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
         qemu_add_machine_init_done_notifier(&sev_machine_done_notify);
     }
 
+    if (sev_snp_enabled()) {
+        ms->require_guest_memfd = true;
+    }
+
     qemu_add_vm_change_state_handler(sev_vm_state_change, sev_common);
 
     cgs->ready = true;
-- 
2.25.1