Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
42 lines
774 B
C
42 lines
774 B
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef BOOT_IO_H
|
|
#define BOOT_IO_H
|
|
|
|
#include <asm/shared/io.h>
|
|
|
|
#undef inb
|
|
#undef inw
|
|
#undef inl
|
|
#undef outb
|
|
#undef outw
|
|
#undef outl
|
|
|
|
struct port_io_ops {
|
|
u8 (*f_inb)(u16 port);
|
|
void (*f_outb)(u8 v, u16 port);
|
|
void (*f_outw)(u16 v, u16 port);
|
|
};
|
|
|
|
extern struct port_io_ops pio_ops;
|
|
|
|
/*
|
|
* Use the normal I/O instructions by default.
|
|
* TDX guests override these to use hypercalls.
|
|
*/
|
|
static inline void init_default_io_ops(void)
|
|
{
|
|
pio_ops.f_inb = __inb;
|
|
pio_ops.f_outb = __outb;
|
|
pio_ops.f_outw = __outw;
|
|
}
|
|
|
|
/*
|
|
* Redirect port I/O operations via pio_ops callbacks.
|
|
* TDX guests override these callbacks with TDX-specific helpers.
|
|
*/
|
|
#define inb pio_ops.f_inb
|
|
#define outb pio_ops.f_outb
|
|
#define outw pio_ops.f_outw
|
|
|
|
#endif
|