Sagi Shahar wrote:
Add utility function to issue MMIO TDCALL from TDX guests.
Some detail from the spec would be nice here.
[snip]
diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c new file mode 100644 index 000000000000..f9c1acd5b30c --- /dev/null +++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c @@ -0,0 +1,23 @@ +// SPDX-License-Identifier: GPL-2.0-only
+#include "tdx/tdcall.h" +#include "tdx/tdx.h"
+#define TDG_VP_VMCALL 0
+#define TDG_VP_VMCALL_VE_REQUEST_MMIO 48
+uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t size,
Size is limited to specific values. An enum would help here to self document/limit issues.
enum mmio_write_size { MMIO_SIZE_1B, MMIO_SIZE_2B, MMIO_SIZE_4B, MMIO_SIZE_8B };
Ira
[snip]