[linux-block.git] / arch / x86 / kernel / eisa.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * EISA specific code
 */
#include <linux/cc_platform.h>
#include <linux/ioport.h>
#include <linux/eisa.h>
#include <linux/io.h>

#include <xen/xen.h>

static __init int eisa_bus_probe(void)
{
	void __iomem *p;

	if ((xen_pv_domain() && !xen_initial_domain()) || cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
		return 0;

	p = ioremap(0x0FFFD9, 4);
	if (p && readl(p) == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
		EISA_bus = 1;
	iounmap(p);
	return 0;
}
subsys_initcall(eisa_bus_probe);
Commit	Line	Data
82c73e0a	1	// SPDX-License-Identifier: GPL-2.0-only
f7eaf6e0 TG	2	/*
f7eaf6e0 TG	3	* EISA specific code
f7eaf6e0	4	*/
0f4a1e80	5	#include <linux/cc_platform.h>
f7eaf6e0 TG	6	#include <linux/ioport.h>
f7eaf6e0 TG	7	#include <linux/eisa.h>
ef1d4dea	8	#include <linux/io.h>
f7eaf6e0	9
6a92b111 BO	10	#include <xen/xen.h>
6a92b111 BO	11
f7eaf6e0 TG	12	static __init int eisa_bus_probe(void)
f7eaf6e0 TG	13	{
6a92b111 BO	14	void __iomem *p;
6a92b111 BO	15
0f4a1e80	16	if ((xen_pv_domain() && !xen_initial_domain()) \|\| cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
6a92b111	17	return 0;
f7eaf6e0	18
6a92b111 BO	19	p = ioremap(0x0FFFD9, 4);
6a92b111 BO	20	if (p && readl(p) == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
f7eaf6e0 TG	21	EISA_bus = 1;
	22	iounmap(p);
	23	return 0;
	24	}
	25	subsys_initcall(eisa_bus_probe);