On Mon, Oct 29, 2018 at 05:39:07PM +0000, Okash Khawaja wrote:
> Hi,
>
> For VMX instructions, we use opcodes instead of mnemonics, such as
>
> #define ASM_VMX_VMPTRLD_RAX ".byte 0x0f, 0xc7, 0x30" (from
> arch/x86/include/asm/vmx.h)
>
> for "vmptrld (%%rax)".
>
> Is it because when this was written, the compiler couldn't recognise
> the VMX mnemonics? Or are there other reasons?
They weren't available. This has already been remedied in kvm/next, see
commit 4b1e54786e48 ("KVM/x86: Use assembly instruction mnemonics
instead of .byte streams").
