On 7/8/26 8:42 AM, Mathieu Poirier wrote:
From: Jean-Philippe Brucker <[email protected]>
Once the Realm descriptor has been created, tell KVM to transfer runtime
images (kernel, DT, and rootfs) from guest memory to Realm memory.
Signed-off-by: Jean-Philippe Brucker <[email protected]>
Signed-off-by: Mathieu Poirier <[email protected]>
---
target/arm/kvm-rme.c | 56 ++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 56 insertions(+)
diff --git a/target/arm/kvm-rme.c b/target/arm/kvm-rme.c
index 97ec7c8934c9..58669f4a50f1 100644
--- a/target/arm/kvm-rme.c
+++ b/target/arm/kvm-rme.c
@@ -44,12 +44,68 @@ OBJECT_DEFINE_SIMPLE_TYPE_WITH_INTERFACES(RmeGuest,
rme_guest, RME_GUEST,
static RmeGuest *rme_guest;
+static int rme_populate_range(const RmeRamRegion *region, bool measure,
+ Error **errp)
+{
+ int ret;
+ void *host_ua;
+ hwaddr size = region->size;
+ hwaddr base = region->base;
+ hwaddr start = QEMU_ALIGN_DOWN(base, RME_PAGE_SIZE);
+ hwaddr end = QEMU_ALIGN_UP(base + size, RME_PAGE_SIZE);
+ struct kvm_arm_rmi_populate populate_args;
+
+ host_ua = address_space_map(region->as, base, &size, false,
+ MEMTXATTRS_UNSPECIFIED);
+
+ populate_args = (struct kvm_arm_rmi_populate) {
+ .base = start,
+ .size = end - start,
+ .source_uaddr = (uintptr_t)host_ua,
+ .flags = measure ? KVM_ARM_RMI_POPULATE_FLAGS_MEASURE : 0,
+ };
+
+ while (populate_args.size > 0) {
+ ret = kvm_vm_ioctl(kvm_state, KVM_ARM_RMI_POPULATE, &populate_args, 0);
+ if (ret) {
+ error_setg_errno(errp, -ret,
+ "failed to populate realm [0x%"HWADDR_PRIx",
0x%"HWADDR_PRIx")",
+ start, end);
+ break;
+ }
+ }
+
+ address_space_unmap(region->as, host_ua, size, false, 0);
+
+ return ret;
+}
+
Nit: The argument @measure isn't needed as it's always true, passed
by its only caller rme_populate_range(). I guess it's leftover for
the earlier host series.
+static void rme_populate_ram_region(gpointer data, gpointer err)
+{
+ Error **errp = err;
+ const RmeRamRegion *region = data;
+
+ if (*errp) {
+ return;
+ }
+
+ rme_populate_range(region, /* measure */ true, errp);
+}
+
static void rme_vm_state_change(void *opaque, bool running, RunState state)
{
+ Error *errp = NULL;
+
if (!running) {
return;
}
+ g_slist_foreach(rme_guest->ram_regions, rme_populate_ram_region, &errp);
+ g_slist_free_full(g_steal_pointer(&rme_guest->ram_regions), g_free);
+ if (errp) {
+ return;
+ }
+
kvm_mark_guest_state_protected();
}
Thanks,
Gavin
