mshv-ioctls: Add ioctls def for SEV-SNP AP create

This would be used by SEV-SNP guest during SMP bringup to create AP
threads.

Signed-off-by: Jinank Jain <jinankjain@microsoft.com>

mshv-ioctls/src/ioctls/vm.rs

@@ -146,6 +146,16 @@ impl VmFd {
             Err(errno::Error::last())
         }
     }
+    /// Create AP threads for SEV-SNP guest
+    pub fn sev_snp_ap_create(&self, data: &mshv_sev_snp_ap_create) -> Result<()> {
+        // SAFETY: IOCTL with correct types
+        let ret = unsafe { ioctl_with_ref(self, MSHV_SEV_SNP_AP_CREATE(), data) };
+        if ret == 0 {
+            Ok(())
+        } else {
+            Err(errno::Error::last())
+        }
+    }
     /// Creates/modifies a guest physical memory.
     pub fn map_user_memory(&self, user_memory_region: mshv_user_mem_region) -> Result<()> {
         // SAFETY: IOCTL with correct types

mshv-ioctls/src/mshv_ioctls.rs

@@ -125,3 +125,9 @@ ioctl_iow_nr!(
 );
 ioctl_iowr_nr!(MSHV_READ_GPA, MSHV_IOCTL, 0x32, mshv_read_write_gpa);
 ioctl_iow_nr!(MSHV_WRITE_GPA, MSHV_IOCTL, 0x33, mshv_read_write_gpa);
+ioctl_iow_nr!(
+    MSHV_SEV_SNP_AP_CREATE,
+    MSHV_IOCTL,
+    0x34,
+    mshv_sev_snp_ap_create
+);