Kirill A. Shutemov eb4ea1ae8f x86/boot: Port I/O: Allow to hook up alternative helpers ... 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 with a new pio_ops structure. For now, set the ops structure to just call the normal I/O operation functions. out*()/in*() macros redefined to use pio_ops callbacks. It eliminates need in changing call sites. io_delay() changed to use port I/O helper instead of inline assembly. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Link: https://lkml.kernel.org/r/20220405232939.73860-16-kirill.shutemov@linux.intel.com		2022-04-07 08:27:52 -07:00
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rm	x86/boot: Port I/O: Allow to hook up alternative helpers	2022-04-07 08:27:52 -07:00
init.c	- Flush *all* mappings from the TLB after switching to the trampoline	2022-01-10 09:51:38 -08:00
Makefile	x86, objtool: Dont exclude arch/x86/realmode/	2021-05-12 14:54:54 +02:00
rmpiggy.S	x86/asm/realmode: Use SYM_DATA_* instead of GLOBAL	2019-10-18 11:28:47 +02:00