From: Lv Zheng Date: Wed, 8 Jan 2014 05:43:40 +0000 (+0800) Subject: ACPICA: Cleanup the option of forcing the use of the RSDT. X-Git-Tag: firefly_0821_release~176^2~4497^2~1^6~16 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=fab4610583855d544394320d47fccb43305a6398;p=firefly-linux-kernel-4.4.55.git ACPICA: Cleanup the option of forcing the use of the RSDT. This change adds a runtime option that will force ACPICA to use the RSDT instead of the XSDT. Although the ACPI spec requires that an XSDT be used instead of the RSDT, the XSDT has been found to be corrupt or ill-formed on some machines. This option is already in the Linux kernel. When it is back ported to ACPICA, code is re-written to follow ACPICA coding style. This patch is the generation of the integration. Signed-off-by: Lv Zheng Signed-off-by: Bob Moore Signed-off-by: Rafael J. Wysocki --- diff --git a/arch/ia64/kernel/acpi.c b/arch/ia64/kernel/acpi.c index 59d52e3aef12..28dc6ba6690a 100644 --- a/arch/ia64/kernel/acpi.c +++ b/arch/ia64/kernel/acpi.c @@ -61,7 +61,6 @@ #define PREFIX "ACPI: " -u32 acpi_rsdt_forced; unsigned int acpi_cpei_override; unsigned int acpi_cpei_phys_cpuid; diff --git a/arch/x86/kernel/acpi/boot.c b/arch/x86/kernel/acpi/boot.c index 6c0b43bd024b..0b0b91b83d51 100644 --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -46,7 +46,6 @@ #include "sleep.h" /* To include x86_acpi_suspend_lowlevel */ static int __initdata acpi_force = 0; -u32 acpi_rsdt_forced; int acpi_disabled; EXPORT_SYMBOL(acpi_disabled); @@ -1564,7 +1563,7 @@ static int __init parse_acpi(char *arg) } /* acpi=rsdt use RSDT instead of XSDT */ else if (strcmp(arg, "rsdt") == 0) { - acpi_rsdt_forced = 1; + acpi_gbl_do_not_use_xsdt = TRUE; } /* "acpi=noirq" disables ACPI interrupt routing */ else if (strcmp(arg, "noirq") == 0) { diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index e9f1fc7f99c7..cffb45742aa5 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -118,6 +118,14 @@ bool ACPI_INIT_GLOBAL(acpi_gbl_enable_aml_debug_object, FALSE); */ u8 ACPI_INIT_GLOBAL(acpi_gbl_copy_dsdt_locally, FALSE); +/* + * Optionally ignore an XSDT if present and use the RSDT instead. + * Although the ACPI specification requires that an XSDT be used instead + * of the RSDT, the XSDT has been found to be corrupt or ill-formed on + * some machines. Default behavior is to use the XSDT if present. + */ +u8 ACPI_INIT_GLOBAL(acpi_gbl_do_not_use_xsdt, FALSE); + /* * Optionally truncate I/O addresses to 16 bits. Provides compatibility * with other ACPI implementations. NOTE: During ACPICA initialization, diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c index ee6067062cdc..6412d3c301cb 100644 --- a/drivers/acpi/acpica/tbutils.c +++ b/drivers/acpi/acpica/tbutils.c @@ -478,10 +478,10 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) ACPI_CAST_PTR(struct acpi_table_header, rsdp)); - /* Differentiate between RSDT and XSDT root tables */ + /* Use XSDT if present and not overridden. Otherwise, use RSDT */ - if ((rsdp->revision > 1) && rsdp->xsdt_physical_address - && !acpi_rsdt_forced) { + if ((rsdp->revision > 1) && + rsdp->xsdt_physical_address && !acpi_gbl_do_not_use_xsdt) { /* * RSDP contains an XSDT (64-bit physical addresses). We must use * the XSDT if the revision is > 1 and the XSDT pointer is present, @@ -503,8 +503,8 @@ acpi_status __init acpi_tb_parse_root_table(acpi_physical_address rsdp_address) acpi_os_unmap_memory(rsdp, sizeof(struct acpi_table_rsdp)); /* - * If it is present, validate the XSDT for access/size and ensure - * that all table entries are at least non-NULL + * If it is present and used, validate the XSDT for access/size + * and ensure that all table entries are at least non-NULL */ if (table_entry_size == ACPI_XSDT_ENTRY_SIZE) { status = acpi_tb_validate_xsdt(address); diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index 4278aba96503..30b01f889538 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -54,7 +54,6 @@ #include extern u8 acpi_gbl_permanent_mmap; -extern u32 acpi_rsdt_forced; /* * Globals that are publically available @@ -72,17 +71,18 @@ extern u32 acpi_dbg_layer; /* ACPICA runtime options */ -extern u8 acpi_gbl_enable_interpreter_slack; extern u8 acpi_gbl_all_methods_serialized; -extern u8 acpi_gbl_create_osi_method; -extern u8 acpi_gbl_use_default_register_widths; -extern acpi_name acpi_gbl_trace_method_name; -extern u32 acpi_gbl_trace_flags; -extern bool acpi_gbl_enable_aml_debug_object; extern u8 acpi_gbl_copy_dsdt_locally; -extern u8 acpi_gbl_truncate_io_addresses; +extern u8 acpi_gbl_create_osi_method; extern u8 acpi_gbl_disable_auto_repair; extern u8 acpi_gbl_disable_ssdt_table_load; +extern u8 acpi_gbl_do_not_use_xsdt; +extern bool acpi_gbl_enable_aml_debug_object; +extern u8 acpi_gbl_enable_interpreter_slack; +extern u32 acpi_gbl_trace_flags; +extern acpi_name acpi_gbl_trace_method_name; +extern u8 acpi_gbl_truncate_io_addresses; +extern u8 acpi_gbl_use_default_register_widths; /* * Hardware-reduced prototypes. All interfaces that use these macros will