Re: [PATCH 10/26] x86/tdx: Support TDX guest port I/O at decompression time

[Kirill A. Shutemov]

On Wed, Jan 19, 2022 at 08:46:24PM +0100, Borislav Petkov wrote:
> On Wed, Jan 19, 2022 at 06:49:25PM +0300, Kirill A. Shutemov wrote:
> > const struct port_io_ops default_pio_ops = {
> > 	.inb = inb,
> > 	.inw = inw,
> > 	.inl = inl,
> > 	.outb = outb,
> > 	.outw = outw,
> > 	.outl = outl,
> > };
> > 
> > make pio_ops a pointer and assign it here:
> > 
> > 	pio_ops = &default_pio_ops;
> > 
> > But it leads to an issue on linking:
> > 
> > ld.lld: error: Unexpected run-time relocations (.rela) detected!
> 
> So the above generates absolute relocations of type R_X86_64_64
> 
> Relocation section '.rela.data.rel.local' at offset 0x5c18 contains 6 entries:
>   Offset          Info           Type           Sym. Value    Sym. Name + Addend
> 000000000000  000200000001 R_X86_64_64       0000000000000000 .text + 10
> 000000000008  000200000001 R_X86_64_64       0000000000000000 .text + 30
> 000000000010  000200000001 R_X86_64_64       0000000000000000 .text + 50
> 000000000018  000200000001 R_X86_64_64       0000000000000000 .text + 0
> 000000000020  000200000001 R_X86_64_64       0000000000000000 .text + 20
> 000000000028  000200000001 R_X86_64_64       0000000000000000 .text + 40
> 
> and the linker doesn't like them probably because of the mcmodel we use
> but I need to talk to toolchain folks first to make sense of what's
> going on...

JFYI, the message comes from ASSERT in vmlinux.lds.S.

I assume for now I can proceed with the assignment that works, right?
It can be changed later once we figure out what is going on.

-- 
 Kirill A. Shutemov