| // 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); |
