[PATCH v3 49/70] i386/tdx: Call KVM_TDX_INIT_VCPU to initialize TDX vcpu

Xiaoyao Li
2023-11-15T07:22:12Z

TDX vcpu needs to be initialized by SEAMCALL(TDH.VP.INIT) and KVM
provides vcpu level IOCTL KVM_TDX_INIT_VCPU for it.

KVM_TDX_INIT_VCPU needs the address of the HOB as input. Invoke it for
each vcpu after HOB list is created.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
---
target/i386/kvm/tdx.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 4b8c13890b11..e55c1190c27e 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -585,6 +585,22 @@ static void tdx_init_ram_entries(void)
tdx_guest->nr_ram_entries = j;
}

+static void tdx_post_init_vcpus(void)
+{
+ TdxFirmwareEntry *hob;
+ CPUState *cpu;
+ int r;
+
+ hob = tdx_get_hob_entry(tdx_guest);
+ CPU_FOREACH(cpu) {
+ r = tdx_vcpu_ioctl(cpu, KVM_TDX_INIT_VCPU, 0, (void *)hob->address);
+ if (r < 0) {
+ error_report("KVM_TDX_INIT_VCPU failed %s", strerror(-r));
+ exit(1);
+ }
+ }
+}
+
static void tdx_finalize_vm(Notifier *notifier, void *unused)
{
TdxFirmware *tdvf = &tdx_guest->tdvf;
@@ -617,6 +633,8 @@ static void tdx_finalize_vm(Notifier *notifier, void *unused)

tdvf_hob_create(tdx_guest, tdx_get_hob_entry(tdx_guest));

+ tdx_post_init_vcpus();
+
for_each_tdx_fw_entry(tdvf, entry) {
struct kvm_tdx_init_mem_region mem_region = {
.source_addr = (__u64)entry->mem_ptr,
--
2.34.1