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// 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)
{
u32 *p;
if ((xen_pv_domain() && !xen_initial_domain()) || cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
return 0;
p = memremap(0x0FFFD9, 4, MEMREMAP_WB);
if (p && *p == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
EISA_bus = 1;
memunmap(p);
return 0;
}
subsys_initcall(eisa_bus_probe);
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