Merge tag 'acpi-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull ACPI updates from Rafael Wysocki:
 "These fix a frequency limit issue in the ACPI processor performance
  library code, fix a few issues in the ACPICA code, improve Crystal
  Cove support in the ACPI PMIC driver, fix string handling in the ACPI
  battery driver, add IRQ override quirks for a few machines more, fix
  other assorted problems and clean up code and documentation.

  Specifics:

   - Drop port I/O validation for some regions to avoid AML failures due
     to rejections of legitimate port I/O writes (Mario Limonciello)

   - Constify acpi_get_handle() pathname argument to allow its callers
     to pass const pathnames to it (Sakari Ailus)

   - Prevent acpi_ns_simple_repair() from crashing in some cases when
     AE_AML_NO_RETURN_VALUE should be returned (Daniil Tatianin)

   - Fix typo in CDAT DSMAS struct definition (Lukas Wunner)

   - Drop an unnecessary (void *) conversion from the ACPI processor
     driver (Zhou jie)

   - Modify the ACPI processor performance library code to use the "no
     limit" frequency QoS as appropriate and adjust the intel_pstate
     driver accordingly (Rafael Wysocki)

   - Add support for NBFT to the ACPI table parser (Stuart Hayes)

   - Introduce list of known non-PNP devices to avoid enumerating some
     of them as PNP devices (Rafael Wysocki)

   - Add x86 ACPI paths to the ACPI entry in MAINTAINERS to allow
     scripts to report the actual maintainers information (Rafael
     Wysocki)

   - Add two more entries to the ACPI IRQ override quirk list (Adam
     Niederer, Werner Sembach)

   - Add a pmic_i2c_address entry for Intel Bay Trail Crystal Cove to
     allow intel_soc_pmic_exec_mipi_pmic_seq_element() to be used with
     the Bay Trail Crystal Cove PMIC OpRegion driver (Hans de Goede)

   - Add comments with DSDT power OpRegion field names to the ACPI PMIC
     driver (Hans de Goede)

   - Fix string termination handling in the ACPI battery driver (Armin
     Wolf)

   - Limit error type to 32-bit width in the ACPI APEI error injection
     code (Shuai Xue)

   - Fix Lenovo Ideapad Z570 DMI match in the ACPI backlight driver
     (Hans de Goede)

   - Silence missing prototype warnings in some places in the
     ACPI-related code (Ammar Faizi)

   - Make kobj_type structures used in the ACPI code constant (Thomas
     Weißschuh)

   - Correct spelling in firmware-guide/ACPI (Randy Dunlap)

   - Clarify the meaning of Explicit and Implicit in the _DSD GPIO
     properties documentation (Andy Shevchenko)

   - Fix some kernel-doc comments in the ACPI CPPC library code (Yang
     Li)"

* tag 'acpi-6.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (25 commits)
  ACPI: make kobj_type structures constant
  Documentation: firmware-guide: gpio-properties: Clarify Explicit and Implicit
  ACPICA: Fix typo in CDAT DSMAS struct definition
  ACPI: resource: Do IRQ override on all TongFang GMxRGxx
  ACPI: resource: Add IRQ overrides for MAINGEAR Vector Pro 2 models
  ACPI: CPPC: Fix some kernel-doc comments
  ACPI: video: Fix Lenovo Ideapad Z570 DMI match
  Documentation: firmware-guide/ACPI: correct spelling
  ACPI: PMIC: Add comments with DSDT power opregion field names
  ACPI: battery: Increase maximum string length
  ACPI: battery: Fix buffer overread if not NUL-terminated
  ACPI: APEI: EINJ: Limit error type to 32-bit width
  MAINTAINERS: Add x86 ACPI paths to the ACPI entry
  ACPI: battery: Fix missing NUL-termination with large strings
  ACPI: PNP: Introduce list of known non-PNP devices
  ACPICA: nsrepair: handle cases without a return value correctly
  ACPI: Silence missing prototype warnings
  cpufreq: intel_pstate: Drop ACPI _PSS states table patching
  ACPI: processor: perflib: Avoid updating frequency QoS unnecessarily
  ACPI: processor: perflib: Use the "no limit" frequency QoS
  ...

25 files changed, 163 insertions, 83 deletions

diff --git a/Documentation/firmware-guide/acpi/acpi-lid.rst b/Documentation/firmware-guide/acpi/acpi-lid.rst
index 71b9af13a048..03cbad6c6730 100644
--- a/Documentation/firmware-guide/acpi/acpi-lid.rst
+++ b/Documentation/firmware-guide/acpi/acpi-lid.rst
@@ -34,7 +34,7 @@ state upon the last _LID evaluation. There won't be difference when the
 _LID control method is evaluated during the runtime, the problem is its
 initial returning value. When the AML tables implement this control method
 with cached value, the initial returning value is likely not reliable.
-There are platforms always retun "closed" as initial lid state.
+There are platforms always return "closed" as initial lid state.
 
 Restrictions of the lid state change notifications
 ==================================================
diff --git a/Documentation/firmware-guide/acpi/gpio-properties.rst b/Documentation/firmware-guide/acpi/gpio-properties.rst
index eaec732cc77c..db0c0b1f3700 100644
--- a/Documentation/firmware-guide/acpi/gpio-properties.rst
+++ b/Documentation/firmware-guide/acpi/gpio-properties.rst
@@ -67,17 +67,30 @@ state of the output pin which driver should use during its initialization.
 Linux tries to use common sense here and derives the state from the bias
 and polarity settings. The table below shows the expectations:
 
-=========  =============  ==============
-Pull Bias     Polarity     Requested...
-=========  =============  ==============
-Implicit     x            AS IS (assumed firmware configured for us)
-Explicit     x (no _DSD)  as Pull Bias (Up == High, Down == Low),
-                          assuming non-active (Polarity = !Pull Bias)
-Down         Low          as low, assuming active
-Down         High         as low, assuming non-active
-Up           Low          as high, assuming non-active
-Up           High         as high, assuming active
-=========  =============  ==============
++-------------+-------------+-----------------------------------------------+
+| Pull Bias   | Polarity    | Requested...                                  |
++=============+=============+===============================================+
+| Implicit                                                                  |
++-------------+-------------+-----------------------------------------------+
+| **Default** | x           | AS IS (assumed firmware configured it for us) |
++-------------+-------------+-----------------------------------------------+
+| Explicit                                                                  |
++-------------+-------------+-----------------------------------------------+
+| **None**    | x           | AS IS (assumed firmware configured it for us) |
+|             |             | with no Pull Bias                             |
++-------------+-------------+-----------------------------------------------+
+| **Up**      | x (no _DSD) |                                               |
+|             +-------------+ as high, assuming non-active                  |
+|             | Low         |                                               |
+|             +-------------+-----------------------------------------------+
+|             | High        | as high, assuming active                      |
++-------------+-------------+-----------------------------------------------+
+| **Down**    | x (no _DSD) |                                               |
+|             +-------------+ as low, assuming non-active                   |
+|             | High        |                                               |
+|             +-------------+-----------------------------------------------+
+|             | Low         | as low, assuming active                       |
++-------------+-------------+-----------------------------------------------+
 
 That said, for our above example the both GPIOs, since the bias setting
 is explicit and _DSD is present, will be treated as active with a high
diff --git a/Documentation/firmware-guide/acpi/namespace.rst b/Documentation/firmware-guide/acpi/namespace.rst
index 6193582a2204..4ef963679a3d 100644
--- a/Documentation/firmware-guide/acpi/namespace.rst
+++ b/Documentation/firmware-guide/acpi/namespace.rst
@@ -31,7 +31,7 @@ Description Table).  The XSDT always points to the FADT (Fixed ACPI
 Description Table) using its first entry, the data within the FADT
 includes various fixed-length entries that describe fixed ACPI features
 of the hardware.  The FADT contains a pointer to the DSDT
-(Differentiated System Descripition Table).  The XSDT also contains
+(Differentiated System Description Table).  The XSDT also contains
 entries pointing to possibly multiple SSDTs (Secondary System
 Description Table).
 
diff --git a/MAINTAINERS b/MAINTAINERS
index 7ae5f8b33c8c..819a22b6150f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -361,6 +361,8 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
 F:	Documentation/ABI/testing/configfs-acpi
 F:	Documentation/ABI/testing/sysfs-bus-acpi
 F:	Documentation/firmware-guide/acpi/
+F:	arch/x86/kernel/acpi/
+F:	arch/x86/pci/acpi.c
 F:	drivers/acpi/
 F:	drivers/pci/*/*acpi*
 F:	drivers/pci/*acpi*
@@ -19918,7 +19920,8 @@ L:	linux-pm@vger.kernel.org
 S:	Supported
 B:	https://bugzilla.kernel.org
 F:	Documentation/power/
-F:	arch/x86/kernel/acpi/
+F:	arch/x86/kernel/acpi/sleep*
+F:	arch/x86/kernel/acpi/wakeup*
 F:	drivers/base/power/
 F:	include/linux/freezer.h
 F:	include/linux/pm.h
diff --git a/drivers/acpi/acpi_lpit.c b/drivers/acpi/acpi_lpit.c
index 50540d4d4948..3843d2576d3f 100644
--- a/drivers/acpi/acpi_lpit.c
+++ b/drivers/acpi/acpi_lpit.c
@@ -10,6 +10,7 @@
 #include <linux/acpi.h>
 #include <asm/msr.h>
 #include <asm/tsc.h>
+#include "internal.h"
 
 struct lpit_residency_info {
 	struct acpi_generic_address gaddr;
diff --git a/drivers/acpi/acpi_pnp.c b/drivers/acpi/acpi_pnp.c
index ffdcfcd4a10d..01abf26764b0 100644
--- a/drivers/acpi/acpi_pnp.c
+++ b/drivers/acpi/acpi_pnp.c
@@ -348,10 +348,22 @@ static bool acpi_pnp_match(const char *idstr, const struct acpi_device_id **matc
 	return false;
 }
 
+/*
+ * If one of the device IDs below is present in the list of device IDs of a
+ * given ACPI device object, the PNP scan handler will not attach to that
+ * object, because there is a proper non-PNP driver in the kernel for the
+ * device represented by it.
+ */
+static const struct acpi_device_id acpi_nonpnp_device_ids[] = {
+	{"INTC1080"},
+	{"INTC1081"},
+	{""},
+};
+
 static int acpi_pnp_attach(struct acpi_device *adev,
 			   const struct acpi_device_id *id)
 {
-	return 1;
+	return !!acpi_match_device_ids(adev, acpi_nonpnp_device_ids);
 }
 
 static struct acpi_scan_handler acpi_pnp_handler = {
diff --git a/drivers/acpi/acpica/hwvalid.c b/drivers/acpi/acpica/hwvalid.c
index 915b26448d2c..0d392e7b0747 100644
--- a/drivers/acpi/acpica/hwvalid.c
+++ b/drivers/acpi/acpica/hwvalid.c
@@ -23,8 +23,8 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width);
  *
  * The table is used to implement the Microsoft port access rules that
  * first appeared in Windows XP. Some ports are always illegal, and some
- * ports are only illegal if the BIOS calls _OSI with a win_XP string or
- * later (meaning that the BIOS itelf is post-XP.)
+ * ports are only illegal if the BIOS calls _OSI with nothing newer than
+ * the specific _OSI strings.
  *
  * This provides ACPICA with the desired port protections and
  * Microsoft compatibility.
@@ -145,7 +145,8 @@ acpi_hw_validate_io_request(acpi_io_address address, u32 bit_width)
 
 			/* Port illegality may depend on the _OSI calls made by the BIOS */
 
-			if (acpi_gbl_osi_data >= port_info->osi_dependency) {
+			if (port_info->osi_dependency == ACPI_ALWAYS_ILLEGAL ||
+			    acpi_gbl_osi_data == port_info->osi_dependency) {
 				ACPI_DEBUG_PRINT((ACPI_DB_VALUES,
 						  "Denied AML access to port 0x%8.8X%8.8X/%X (%s 0x%.4X-0x%.4X)\n",
 						  ACPI_FORMAT_UINT64(address),
diff --git a/drivers/acpi/acpica/nsrepair.c b/drivers/acpi/acpica/nsrepair.c
index 367fcd201f96..ec512e06a48e 100644
--- a/drivers/acpi/acpica/nsrepair.c
+++ b/drivers/acpi/acpica/nsrepair.c
@@ -181,8 +181,9 @@ acpi_ns_simple_repair(struct acpi_evaluate_info *info,
 	 * Try to fix if there was no return object. Warning if failed to fix.
 	 */
 	if (!return_object) {
-		if (expected_btypes && (!(expected_btypes & ACPI_RTYPE_NONE))) {
-			if (package_index != ACPI_NOT_PACKAGE_ELEMENT) {
+		if (expected_btypes) {
+			if (!(expected_btypes & ACPI_RTYPE_NONE) &&
+			    package_index != ACPI_NOT_PACKAGE_ELEMENT) {
 				ACPI_WARN_PREDEFINED((AE_INFO,
 						      info->full_pathname,
 						      ACPI_WARN_ALWAYS,
@@ -196,14 +197,15 @@ acpi_ns_simple_repair(struct acpi_evaluate_info *info,
 				if (ACPI_SUCCESS(status)) {
 					return (AE_OK);	/* Repair was successful */
 				}
-			} else {
+			}
+
+			if (expected_btypes != ACPI_RTYPE_NONE) {
 				ACPI_WARN_PREDEFINED((AE_INFO,
 						      info->full_pathname,
 						      ACPI_WARN_ALWAYS,
 						      "Missing expected return value"));
+				return (AE_AML_NO_RETURN_VALUE);
 			}
-
-			return (AE_AML_NO_RETURN_VALUE);
 		}
 	}
 
diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c
index b2cfdfef3194..a0592d15dd37 100644
--- a/drivers/acpi/acpica/nsxfname.c
+++ b/drivers/acpi/acpica/nsxfname.c
@@ -44,7 +44,7 @@ static char *acpi_ns_copy_device_id(struct acpi_pnp_device_id *dest,
 
 acpi_status
 acpi_get_handle(acpi_handle parent,
-		acpi_string pathname, acpi_handle *ret_handle)
+		const char *pathname, acpi_handle *ret_handle)
 {
 	acpi_status status;
 	struct acpi_namespace_node *node = NULL;
diff --git a/drivers/acpi/apei/einj.c b/drivers/acpi/apei/einj.c
index ab86b2f4e719..b4373e575660 100644
--- a/drivers/acpi/apei/einj.c
+++ b/drivers/acpi/apei/einj.c
@@ -616,6 +616,10 @@ static int error_type_set(void *data, u64 val)
 	u32 available_error_type = 0;
 	u32 tval, vendor;
 
+	/* Only low 32 bits for error type are valid */
+	if (val & GENMASK_ULL(63, 32))
+		return -EINVAL;
+
 	/*
 	 * Vendor defined types have 0x80000000 bit set, and
 	 * are not enumerated by ACPI_EINJ_GET_ERROR_TYPE
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index f4badcdde76e..9c67ed02d797 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -42,6 +42,8 @@
 #define ACPI_BATTERY_STATE_CHARGING	0x2
 #define ACPI_BATTERY_STATE_CRITICAL	0x4
 
+#define MAX_STRING_LENGTH	64
+
 MODULE_AUTHOR("Paul Diefenbaugh");
 MODULE_AUTHOR("Alexey Starikovskiy <astarikovskiy@suse.de>");
 MODULE_DESCRIPTION("ACPI Battery Driver");
@@ -118,10 +120,10 @@ struct acpi_battery {
 	int capacity_granularity_1;
 	int capacity_granularity_2;
 	int alarm;
-	char model_number[32];
-	char serial_number[32];
-	char type[32];
-	char oem_info[32];
+	char model_number[MAX_STRING_LENGTH];
+	char serial_number[MAX_STRING_LENGTH];
+	char type[MAX_STRING_LENGTH];
+	char oem_info[MAX_STRING_LENGTH];
 	int state;
 	int power_unit;
 	unsigned long flags;
@@ -437,16 +439,25 @@ static int extract_package(struct acpi_battery *battery,
 		element = &package->package.elements[i];
 		if (offsets[i].mode) {
 			u8 *ptr = (u8 *)battery + offsets[i].offset;
+			u32 len = MAX_STRING_LENGTH;
+
+			switch (element->type) {
+			case ACPI_TYPE_BUFFER:
+				if (len > element->buffer.length + 1)
+					len = element->buffer.length + 1;
+
+				fallthrough;
+			case ACPI_TYPE_STRING:
+				strscpy(ptr, element->string.pointer, len);
 
-			if (element->type == ACPI_TYPE_STRING ||
-			    element->type == ACPI_TYPE_BUFFER)
-				strncpy(ptr, element->string.pointer, 32);
-			else if (element->type == ACPI_TYPE_INTEGER) {
-				strncpy(ptr, (u8 *)&element->integer.value,
-					sizeof(u64));
-				ptr[sizeof(u64)] = 0;
-			} else
+				break;
+			case ACPI_TYPE_INTEGER:
+				strscpy(ptr, (u8 *)&element->integer.value, sizeof(u64) + 1);
+
+				break;
+			default:
 				*ptr = 0; /* don't have value */
+			}
 		} else {
 			int *x = (int *)((u8 *)battery + offsets[i].offset);
 			*x = (element->type == ACPI_TYPE_INTEGER) ?
diff --git a/drivers/acpi/cppc_acpi.c b/drivers/acpi/cppc_acpi.c
index 02d83c807271..c51d3ccb4cca 100644
--- a/drivers/acpi/cppc_acpi.c
+++ b/drivers/acpi/cppc_acpi.c
@@ -193,7 +193,7 @@ static struct attribute *cppc_attrs[] = {
 };
 ATTRIBUTE_GROUPS(cppc);
 
-static struct kobj_type cppc_ktype = {
+static const struct kobj_type cppc_ktype = {
 	.sysfs_ops = &kobj_sysfs_ops,
 	.default_groups = cppc_groups,
 };
@@ -595,6 +595,7 @@ bool __weak cpc_supported_by_cpu(void)
 
 /**
  * pcc_data_alloc() - Allocate the pcc_data memory for pcc subspace
+ * @pcc_ss_id: PCC Subspace index as in the PCC client ACPI package.
  *
  * Check and allocate the cppc_pcc_data memory.
  * In some processor configurations it is possible that same subspace
@@ -1603,6 +1604,7 @@ EXPORT_SYMBOL_GPL(cppc_set_perf);
 
 /**
  * cppc_get_transition_latency - returns frequency transition latency in ns
+ * @cpu_num: CPU number for per_cpu().
  *
  * ACPI CPPC does not explicitly specify how a platform can specify the
  * transition latency for performance change requests. The closest we have
diff --git a/drivers/acpi/device_sysfs.c b/drivers/acpi/device_sysfs.c
index 120873dad2cc..c3aa15571f16 100644
--- a/drivers/acpi/device_sysfs.c
+++ b/drivers/acpi/device_sysfs.c
@@ -78,7 +78,7 @@ static void acpi_data_node_release(struct kobject *kobj)
 	complete(&dn->kobj_done);
 }
 
-static struct kobj_type acpi_data_node_ktype = {
+static const struct kobj_type acpi_data_node_ktype = {
 	.sysfs_ops = &acpi_data_node_sysfs_ops,
 	.default_groups = acpi_data_node_default_groups,
 	.release = acpi_data_node_release,
diff --git a/drivers/acpi/ioapic.c b/drivers/acpi/ioapic.c
index a690c7b18623..6677955b4a8e 100644
--- a/drivers/acpi/ioapic.c
+++ b/drivers/acpi/ioapic.c
@@ -24,6 +24,7 @@
 #include <linux/acpi.h>
 #include <linux/pci.h>
 #include <acpi/acpi.h>
+#include "internal.h"
 
 struct acpi_pci_ioapic {
 	acpi_handle	root_handle;
diff --git a/drivers/acpi/pmic/intel_pmic_bytcrc.c b/drivers/acpi/pmic/intel_pmic_bytcrc.c
index 9ea79f210965..2b09f8da5400 100644
--- a/drivers/acpi/pmic/intel_pmic_bytcrc.c
+++ b/drivers/acpi/pmic/intel_pmic_bytcrc.c
@@ -283,6 +283,7 @@ static const struct intel_pmic_opregion_data intel_crc_pmic_opregion_data = {
 	.power_table_count= ARRAY_SIZE(power_table),
 	.thermal_table	= thermal_table,
 	.thermal_table_count = ARRAY_SIZE(thermal_table),
+	.pmic_i2c_address = 0x6e,
 };
 
 static int intel_crc_pmic_opregion_probe(struct platform_device *pdev)
diff --git a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
index 418eec523025..c84ef3d15181 100644
--- a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
+++ b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
@@ -20,19 +20,19 @@
 #define CHTDC_TI_GPADC		0x5a
 
 static struct pmic_table chtdc_ti_power_table[] = {
-	{ .address = 0x00, .reg = 0x41 },
-	{ .address = 0x04, .reg = 0x42 },
-	{ .address = 0x08, .reg = 0x43 },
-	{ .address = 0x0c, .reg = 0x45 },
-	{ .address = 0x10, .reg = 0x46 },
-	{ .address = 0x14, .reg = 0x47 },
-	{ .address = 0x18, .reg = 0x48 },
-	{ .address = 0x1c, .reg = 0x49 },
-	{ .address = 0x20, .reg = 0x4a },
-	{ .address = 0x24, .reg = 0x4b },
-	{ .address = 0x28, .reg = 0x4c },
-	{ .address = 0x2c, .reg = 0x4d },
-	{ .address = 0x30, .reg = 0x4e },
+	{ .address = 0x00, .reg = 0x41 }, /* LDO1 */
+	{ .address = 0x04, .reg = 0x42 }, /* LDO2 */
+	{ .address = 0x08, .reg = 0x43 }, /* LDO3 */
+	{ .address = 0x0c, .reg = 0x45 }, /* LDO5 */
+	{ .address = 0x10, .reg = 0x46 }, /* LDO6 */
+	{ .address = 0x14, .reg = 0x47 }, /* LDO7 */
+	{ .address = 0x18, .reg = 0x48 }, /* LDO8 */
+	{ .address = 0x1c, .reg = 0x49 }, /* LDO9 */
+	{ .address = 0x20, .reg = 0x4a }, /* LD10 */
+	{ .address = 0x24, .reg = 0x4b }, /* LD11 */
+	{ .address = 0x28, .reg = 0x4c }, /* LD12 */
+	{ .address = 0x2c, .reg = 0x4d }, /* LD13 */
+	{ .address = 0x30, .reg = 0x4e }, /* LD14 */
 };
 
 static struct pmic_table chtdc_ti_thermal_table[] = {
diff --git a/drivers/acpi/processor_idle.c b/drivers/acpi/processor_idle.c
index 7f77710c86fc..9718d07cc2a2 100644
--- a/drivers/acpi/processor_idle.c
+++ b/drivers/acpi/processor_idle.c
@@ -147,7 +147,7 @@ static void lapic_timer_check_state(int state, struct acpi_processor *pr,
 
 static void __lapic_timer_propagate_broadcast(void *arg)
 {
-	struct acpi_processor *pr = (struct acpi_processor *) arg;
+	struct acpi_processor *pr = arg;
 
 	if (pr->power.timer_broadcast_on_state < INT_MAX)
 		tick_broadcast_enable();
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 970f04a958cd..4265814c74f8 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -53,6 +53,8 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 {
 	acpi_status status = 0;
 	unsigned long long ppc = 0;
+	s32 qos_value;
+	int index;
 	int ret;
 
 	if (!pr)
@@ -72,17 +74,30 @@ static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
 		}
 	}
 
+	index = ppc;
+
+	if (pr->performance_platform_limit == index ||
+	    ppc >= pr->performance->state_count)
+		return 0;
+
 	pr_debug("CPU %d: _PPC is %d - frequency %s limited\n", pr->id,
-		       (int)ppc, ppc ? "" : "not");
+		 index, index ? "is" : "is not");
 
-	pr->performance_platform_limit = (int)ppc;
+	pr->performance_platform_limit = index;
 
-	if (ppc >= pr->performance->state_count ||
-	    unlikely(!freq_qos_request_active(&pr->perflib_req)))
+	if (unlikely(!freq_qos_request_active(&pr->perflib_req)))
 		return 0;
 
-	ret = freq_qos_update_request(&pr->perflib_req,
-			pr->performance->states[ppc].core_frequency * 1000);
+	/*
+	 * If _PPC returns 0, it means that all of the available states can be
+	 * used ("no limit").
+	 */
+	if (index == 0)
+		qos_value = FREQ_QOS_MAX_DEFAULT_VALUE;
+	else
+		qos_value = pr->performance->states[index].core_frequency * 1000;
+
+	ret = freq_qos_update_request(&pr->perflib_req, qos_value);
 	if (ret < 0) {
 		pr_warn("Failed to update perflib freq constraint: CPU%d (%d)\n",
 			pr->id, ret);
@@ -166,9 +181,16 @@ void acpi_processor_ppc_init(struct cpufreq_policy *policy)
 		if (!pr)
 			continue;
 
+		/*
+		 * Reset performance_platform_limit in case there is a stale
+		 * value in it, so as to make it match the "no limit" QoS value
+		 * below.
+		 */
+		pr->performance_platform_limit = 0;
+
 		ret = freq_qos_add_request(&policy->constraints,
-					   &pr->perflib_req,
-					   FREQ_QOS_MAX, INT_MAX);
+					   &pr->perflib_req, FREQ_QOS_MAX,
+					   FREQ_QOS_MAX_DEFAULT_VALUE);
 		if (ret < 0)
 			pr_err("Failed to add freq constraint for CPU%d (%d)\n",
 			       cpu, ret);
diff --git a/drivers/acpi/resource.c b/drivers/acpi/resource.c
index 192d1784e409..a222bda7e15b 100644
--- a/drivers/acpi/resource.c
+++ b/drivers/acpi/resource.c
@@ -467,17 +467,34 @@ static const struct dmi_system_id lenovo_laptop[] = {
 	{ }
 };
 
-static const struct dmi_system_id schenker_gm_rg[] = {
+static const struct dmi_system_id tongfang_gm_rg[] = {
 	{
-		.ident = "XMG CORE 15 (M22)",
+		.ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD",
 		.matches = {
-			DMI_MATCH(DMI_SYS_VENDOR, "SchenkerTechnologiesGmbH"),
 			DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"),
 		},
 	},
 	{ }
 };
 
+static const struct dmi_system_id maingear_laptop[] = {
+	{
+		.ident = "MAINGEAR Vector Pro 2 15",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"),
+		}
+	},
+	{
+		.ident = "MAINGEAR Vector Pro 2 17",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"),
+		},
+	},
+	{ }
+};
+
 struct irq_override_cmp {
 	const struct dmi_system_id *system;
 	unsigned char irq;
@@ -492,7 +509,8 @@ static const struct irq_override_cmp override_table[] = {
 	{ asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false },
 	{ lenovo_laptop, 6, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, true },
 	{ lenovo_laptop, 10, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, true },
-	{ schenker_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
+	{ tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
+	{ maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true },
 };
 
 static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity,
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index 7db3b530279b..7f4ff56c9d42 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -953,7 +953,7 @@ static struct attribute *hotplug_profile_attrs[] = {
 };
 ATTRIBUTE_GROUPS(hotplug_profile);
 
-static struct kobj_type acpi_hotplug_profile_ktype = {
+static const struct kobj_type acpi_hotplug_profile_ktype = {
 	.sysfs_ops = &kobj_sysfs_ops,
 	.default_groups = hotplug_profile_groups,
 };
diff --git a/drivers/acpi/tables.c b/drivers/acpi/tables.c
index 5fbc32b802d0..7b4680da57d7 100644
--- a/drivers/acpi/tables.c
+++ b/drivers/acpi/tables.c
@@ -555,7 +555,8 @@ static const char table_sigs[][ACPI_NAMESEG_SIZE] __initconst = {
 	ACPI_SIG_WDDT, ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT,
 	ACPI_SIG_PSDT, ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT,
 	ACPI_SIG_IORT, ACPI_SIG_NFIT, ACPI_SIG_HMAT, ACPI_SIG_PPTT,
-	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI };
+	ACPI_SIG_NHLT, ACPI_SIG_AEST, ACPI_SIG_CEDT, ACPI_SIG_AGDI,
+	ACPI_SIG_NBFT };
 
 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
 
diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c
index a8c02608dde4..710ac640267d 100644
--- a/drivers/acpi/video_detect.c
+++ b/drivers/acpi/video_detect.c
@@ -434,7 +434,7 @@ static const struct dmi_system_id video_detect_dmi_table[] = {
 	 /* Lenovo Ideapad Z570 */
 	 .matches = {
 		DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
-		DMI_MATCH(DMI_PRODUCT_NAME, "102434U"),
+		DMI_MATCH(DMI_PRODUCT_VERSION, "Ideapad Z570"),
 		},
 	},
 	{
diff --git a/drivers/cpufreq/intel_pstate.c b/drivers/cpufreq/intel_pstate.c
index fd73d6d2b808..cb4beec27555 100644
--- a/drivers/cpufreq/intel_pstate.c
+++ b/drivers/cpufreq/intel_pstate.c
@@ -452,20 +452,6 @@ static void intel_pstate_init_acpi_perf_limits(struct cpufreq_policy *policy)
 			 (u32) cpu->acpi_perf_data.states[i].control);
 	}
 
-	/*
-	 * The _PSS table doesn't contain whole turbo frequency range.
-	 * This just contains +1 MHZ above the max non turbo frequency,
-	 * with control value corresponding to max turbo ratio. But
-	 * when cpufreq set policy is called, it will call with this
-	 * max frequency, which will cause a reduced performance as
-	 * this driver uses real max turbo frequency as the max
-	 * frequency. So correct this frequency in _PSS table to
-	 * correct max turbo frequency based on the turbo state.
-	 * Also need to convert to MHz as _PSS freq is in MHz.
-	 */
-	if (!global.turbo_disabled)
-		cpu->acpi_perf_data.states[0].core_frequency =
-					policy->cpuinfo.max_freq / 1000;
 	cpu->valid_pss_table = true;
 	pr_debug("_PPC limits will be enforced\n");
 
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 9778408f8db4..8e364cbdd14a 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -526,7 +526,7 @@ ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 					   struct acpi_buffer *ret_path_ptr))
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 			     acpi_get_handle(acpi_handle parent,
-					     acpi_string pathname,
+					     const char *pathname,
 					     acpi_handle *ret_handle))
 ACPI_EXTERNAL_RETURN_STATUS(acpi_status
 			     acpi_attach_data(acpi_handle object,
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 4175dce3967c..cdedccccc4f3 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -50,6 +50,8 @@
 #define ACPI_SIG_S3PT           "S3PT"	/* S3 Performance (sub)Table */
 #define ACPI_SIG_PCCS           "PCC"	/* PCC Shared Memory Region */
 
+#define ACPI_SIG_NBFT		"NBFT"	/* NVMe Boot Firmware Table */
+
 /* Reserved table signatures */
 
 #define ACPI_SIG_MATR           "MATR"	/* Memory Address Translation Table */
@@ -344,7 +346,7 @@ enum acpi_cdat_type {
 
 /* Subtable 0: Device Scoped Memory Affinity Structure (DSMAS) */
 
-struct acpi_cadt_dsmas {
+struct acpi_cdat_dsmas {
 	u8 dsmad_handle;
 	u8 flags;
 	u16 reserved;