summaryrefslogtreecommitdiff
path: root/tools/power
diff options
context:
space:
mode:
authorLv Zheng <lv.zheng@intel.com>2017-08-03 09:26:56 +0300
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-08-04 00:34:16 +0300
commit03c5b6b0da3f8ce8a4ba463daeb26b151d36f10e (patch)
tree50094f6cb2d6ad4575aab63e230c68fb3f0add6c /tools/power
parent65082bfcb486ef06f93b7603a9045cdf0c0022e8 (diff)
downloadlinux-03c5b6b0da3f8ce8a4ba463daeb26b151d36f10e.tar.xz
ACPICA: acpidump: Add DSDT/FACS instance support for Linux and EFI
ACPICA commit 343fc31840d40c06001f3b170ee5bcdfd3c7f3e0 ACPI spec allows to configure different 32-bit/64-bit table addresses for DSDT and FACS. And for FACS, it's meaningful to dump both of them as they are used to support different suspend protocols. While: 1. on Linux, only 1 instance is supported for DSDT/FACS; and 2. on EFI, the code in osl_get_table() is buggy with special table instances, causing endless file dump for such tables (reported by Shao Ming in link #2). This patch adds DSDT/FACS instance support for Linux/EFI acpidump. Fixed by Lv Zheng. Link: https://github.com/acpica/acpica/commit/343fc318 Link: https://bugs.acpica.org/show_bug.cgi?id=1407 [#1] Link: https://github.com/acpica/acpica/issues/285 [#2] Reported-by: Shao Ming <smbest163@163.com> Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/power')
-rw-r--r--tools/power/acpi/os_specific/service_layers/oslinuxtbl.c105
1 files changed, 73 insertions, 32 deletions
diff --git a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
index 82a2ff896a95..52a39ecf5ca1 100644
--- a/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
+++ b/tools/power/acpi/os_specific/service_layers/oslinuxtbl.c
@@ -759,7 +759,7 @@ static acpi_status osl_list_bios_tables(void)
/* Skip NULL entries in RSDT/XSDT */
- if (!table_address) {
+ if (table_address == 0) {
continue;
}
@@ -808,7 +808,8 @@ osl_get_bios_table(char *signature,
u8 number_of_tables;
u8 item_size;
u32 current_instance = 0;
- acpi_physical_address table_address = 0;
+ acpi_physical_address table_address;
+ acpi_physical_address first_table_address = 0;
u32 table_length = 0;
acpi_status status = AE_OK;
u32 i;
@@ -820,9 +821,10 @@ osl_get_bios_table(char *signature,
ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT) ||
ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT) ||
ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) {
- if (instance > 0) {
- return (AE_LIMIT);
- }
+
+find_next_instance:
+
+ table_address = 0;
/*
* Get the appropriate address, either 32-bit or 64-bit. Be very
@@ -830,41 +832,66 @@ osl_get_bios_table(char *signature,
* Note: The 64-bit addresses have priority.
*/
if (ACPI_COMPARE_NAME(signature, ACPI_SIG_DSDT)) {
- if ((gbl_fadt->header.length >= MIN_FADT_FOR_XDSDT) &&
- gbl_fadt->Xdsdt) {
- table_address =
- (acpi_physical_address)gbl_fadt->Xdsdt;
- } else
- if ((gbl_fadt->header.length >= MIN_FADT_FOR_DSDT)
- && gbl_fadt->dsdt) {
- table_address =
- (acpi_physical_address)gbl_fadt->dsdt;
+ if (current_instance < 2) {
+ if ((gbl_fadt->header.length >=
+ MIN_FADT_FOR_XDSDT) && gbl_fadt->Xdsdt
+ && current_instance == 0) {
+ table_address =
+ (acpi_physical_address)gbl_fadt->
+ Xdsdt;
+ } else
+ if ((gbl_fadt->header.length >=
+ MIN_FADT_FOR_DSDT)
+ && gbl_fadt->dsdt !=
+ first_table_address) {
+ table_address =
+ (acpi_physical_address)gbl_fadt->
+ dsdt;
+ }
}
} else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_FACS)) {
- if ((gbl_fadt->header.length >= MIN_FADT_FOR_XFACS) &&
- gbl_fadt->Xfacs) {
- table_address =
- (acpi_physical_address)gbl_fadt->Xfacs;
- } else
- if ((gbl_fadt->header.length >= MIN_FADT_FOR_FACS)
- && gbl_fadt->facs) {
- table_address =
- (acpi_physical_address)gbl_fadt->facs;
+ if (current_instance < 2) {
+ if ((gbl_fadt->header.length >=
+ MIN_FADT_FOR_XFACS) && gbl_fadt->Xfacs
+ && current_instance == 0) {
+ table_address =
+ (acpi_physical_address)gbl_fadt->
+ Xfacs;
+ } else
+ if ((gbl_fadt->header.length >=
+ MIN_FADT_FOR_FACS)
+ && gbl_fadt->facs !=
+ first_table_address) {
+ table_address =
+ (acpi_physical_address)gbl_fadt->
+ facs;
+ }
}
} else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_XSDT)) {
if (!gbl_revision) {
return (AE_BAD_SIGNATURE);
}
- table_address =
- (acpi_physical_address)gbl_rsdp.
- xsdt_physical_address;
+ if (current_instance == 0) {
+ table_address =
+ (acpi_physical_address)gbl_rsdp.
+ xsdt_physical_address;
+ }
} else if (ACPI_COMPARE_NAME(signature, ACPI_SIG_RSDT)) {
- table_address =
- (acpi_physical_address)gbl_rsdp.
- rsdt_physical_address;
+ if (current_instance == 0) {
+ table_address =
+ (acpi_physical_address)gbl_rsdp.
+ rsdt_physical_address;
+ }
} else {
- table_address = (acpi_physical_address)gbl_rsdp_address;
- signature = ACPI_SIG_RSDP;
+ if (current_instance == 0) {
+ table_address =
+ (acpi_physical_address)gbl_rsdp_address;
+ signature = ACPI_SIG_RSDP;
+ }
+ }
+
+ if (table_address == 0) {
+ goto exit_find_table;
}
/* Now we can get the requested special table */
@@ -875,6 +902,18 @@ osl_get_bios_table(char *signature,
}
table_length = ap_get_table_length(mapped_table);
+ if (first_table_address == 0) {
+ first_table_address = table_address;
+ }
+
+ /* Match table instance */
+
+ if (current_instance != instance) {
+ osl_unmap_table(mapped_table);
+ mapped_table = NULL;
+ current_instance++;
+ goto find_next_instance;
+ }
} else { /* Case for a normal ACPI table */
if (osl_can_use_xsdt()) {
@@ -913,7 +952,7 @@ osl_get_bios_table(char *signature,
/* Skip NULL entries in RSDT/XSDT */
- if (!table_address) {
+ if (table_address == 0) {
continue;
}
@@ -946,6 +985,8 @@ osl_get_bios_table(char *signature,
}
}
+exit_find_table:
+
if (!mapped_table) {
return (AE_LIMIT);
}