2026-01-21 18:59:54 +08:00
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* EISA specific code
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*/
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2026-01-29 22:25:33 +08:00
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#include <linux/cc_platform.h>
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2026-01-21 18:59:54 +08:00
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#include <linux/ioport.h>
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#include <linux/eisa.h>
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#include <linux/io.h>
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#include <xen/xen.h>
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static __init int eisa_bus_probe(void)
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{
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void __iomem *p;
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2026-01-29 22:25:33 +08:00
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if ((xen_pv_domain() && !xen_initial_domain()) || cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
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2026-01-21 18:59:54 +08:00
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return 0;
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p = ioremap(0x0FFFD9, 4);
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if (p && readl(p) == 'E' + ('I' << 8) + ('S' << 16) + ('A' << 24))
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EISA_bus = 1;
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iounmap(p);
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return 0;
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}
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subsys_initcall(eisa_bus_probe);
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