pub unsafe fn _mm_loadiwkey(
    control: u32,
    integrity_key: __m128i,
    key_lo: __m128i,
    key_hi: __m128i,
)🔬This is a nightly-only experimental API. (
keylocker_x86 #134813)Available on (x86 or x86-64) and target feature 
kl and x86-64 only.Expand description
Load internal wrapping key (IWKey). The 32-bit unsigned integer control specifies IWKey’s KeySource
and whether backing up the key is permitted. IWKey’s 256-bit encryption key is loaded from key_lo
and key_hi.
- control[0]: NoBackup bit. If set, the IWKey cannot be backed up.
- control[1:4]: KeySource bits. These bits specify the encoding method of the IWKey. The only allowed values are- 0(AES GCM SIV wrapping algorithm with the specified key) and- 1(AES GCM SIV wrapping algorithm with random keys enforced by hardware). After calling- _mm_loadiwkeywith KeySource set to- 1, software must check- ZFto ensure that the key was loaded successfully. Using any other value may result in a General Protection Exception.
- control[5:31]: Reserved for future use, must be set to- 0.
Note that setting the NoBackup bit and using the KeySource value 1 requires hardware support. These
permissions can be found by calling __cpuid(0x19) and checking the ECX[0:1] bits. Failing to follow
these restrictions may result in a General Protection Exception.