On 3/20/24 09:39, Michael Roth wrote:
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@xxxxxxx>
---
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;
+ }
Likewise, this and the following patch should be done in the
sev-snp-guest's override of kvm_init.
Paolo
qemu_add_vm_change_state_handler(sev_vm_state_change, sev_common);
cgs->ready = true;
