| Date | Thu, 24 Feb 2022 14:14:02 -0800 | From | Dave Hansen <> | Subject | Re: [PATCHv4 15/30] x86/boot: Allow to hook up alternative port I/O helpers |
| |
On 2/24/22 07:56, Kirill A. Shutemov wrote: > Port I/O instructions trigger #VE in the TDX environment. In response to > the exception, kernel emulates these instructions using hypercalls. > > But during early boot, on the decompression stage, it is cumbersome to > deal with #VE. It is cleaner to go to hypercalls directly, bypassing #VE > handling. > > Add a way to hook up alternative port I/O helpers in the boot stub.
I'd add one more sentence to that:
... with a new pio_ops structure. For now, set the ops structure to just call the normal I/O operation functions.
But, either way:
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
|