/* * blacklist.c * * Check to see if the given machine has a known bad ACPI BIOS * or if the BIOS is too old. * Check given machine against acpi_rev_dmi_table[]. * * Copyright (C) 2004 Len Brown <len.brown@intel.com> * Copyright (C) 2002 Andy Grover <andrew.grover@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/acpi.h> #include <linux/dmi.h> #include "internal.h" enum acpi_blacklist_predicates { all_versions, less_than_or_equal, equal, greater_than_or_equal, }; struct acpi_blacklist_item { char oem_id[7]; char oem_table_id[9]; u32 oem_revision; char *table; enum acpi_blacklist_predicates oem_revision_predicate; char *reason; u32 is_critical_error; }; static struct dmi_system_id acpi_rev_dmi_table[] __initdata; /* * POLICY: If *anything* doesn't work, put it on the blacklist. * If they are critical errors, mark it critical, and abort driver load. */ static struct acpi_blacklist_item acpi_blacklist[] __initdata = { /* Compaq Presario 1700 */ {"PTLTD ", " DSDT ", 0x06040000, ACPI_SIG_DSDT, less_than_or_equal, "Multiple problems", 1}, /* Sony FX120, FX140, FX150? */ {"SONY ", "U0 ", 0x20010313, ACPI_SIG_DSDT, less_than_or_equal, "ACPI driver problem", 1}, /* Compaq Presario 800, Insyde BIOS */ {"INT440", "SYSFexxx", 0x00001001, ACPI_SIG_DSDT, less_than_or_equal, "Does not use _REG to protect EC OpRegions", 1}, /* IBM 600E - _ADR should return 7, but it returns 1 */ {"IBM ", "TP600E ", 0x00000105, ACPI_SIG_DSDT, less_than_or_equal, "Incorrect _ADR", 1}, {""} }; int __init acpi_blacklisted(void) { int i = 0; int blacklisted = 0; struct acpi_table_header table_header; while (acpi_blacklist[i].oem_id[0] != '\0') { if (acpi_get_table_header(acpi_blacklist[i].table, 0, &table_header)) { i++; continue; } if (strncmp(acpi_blacklist[i].oem_id, table_header.oem_id, 6)) { i++; continue; } if (strncmp (acpi_blacklist[i].oem_table_id, table_header.oem_table_id, 8)) { i++; continue; } if ((acpi_blacklist[i].oem_revision_predicate == all_versions) || (acpi_blacklist[i].oem_revision_predicate == less_than_or_equal && table_header.oem_revision <= acpi_blacklist[i].oem_revision) || (acpi_blacklist[i].oem_revision_predicate == greater_than_or_equal && table_header.oem_revision >= acpi_blacklist[i].oem_revision) || (acpi_blacklist[i].oem_revision_predicate == equal && table_header.oem_revision == acpi_blacklist[i].oem_revision)) { printk(KERN_ERR PREFIX "Vendor \"%6.6s\" System \"%8.8s\" " "Revision 0x%x has a known ACPI BIOS problem.\n", acpi_blacklist[i].oem_id, acpi_blacklist[i].oem_table_id, acpi_blacklist[i].oem_revision); printk(KERN_ERR PREFIX "Reason: %s. This is a %s error\n", acpi_blacklist[i].reason, (acpi_blacklist[i]. is_critical_error ? "non-recoverable" : "recoverable")); blacklisted = acpi_blacklist[i].is_critical_error; break; } else { i++; } } (void)early_acpi_osi_init(); dmi_check_system(acpi_rev_dmi_table); return blacklisted; } #ifdef CONFIG_DMI #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE static int __init dmi_enable_rev_override(const struct dmi_system_id *d) { printk(KERN_NOTICE PREFIX "DMI detected: %s (force ACPI _REV to 5)\n", d->ident); acpi_rev_override_setup(NULL); return 0; } #endif static struct dmi_system_id acpi_rev_dmi_table[] __initdata = { #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE /* * DELL XPS 13 (2015) switches sound between HDA and I2S * depending on the ACPI _REV callback. If userspace supports * I2S sufficiently (or if you do not care about sound), you * can safely disable this quirk. */ { .callback = dmi_enable_rev_override, .ident = "DELL XPS 13 (2015)", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9343"), }, }, #endif {} }; #endif /* CONFIG_DMI */