checked additionally, and -EACCES means that 'power.disable_depth' is
different from 0
+ `int pm_runtime_resume_and_get(struct device *dev);`
+ - run pm_runtime_resume(dev) and if successful, increment the device's
+ usage counter; return the result of pm_runtime_resume
+
`int pm_request_idle(struct device *dev);`
- submit a request to execute the subsystem-level idle callback for the
device (the request is represented by a work item in pm_wq); returns 0 on
F: include/linux/powercap.h
F: kernel/configs/nopm.config
+DYNAMIC THERMAL POWER MANAGEMENT (DTPM)
+M: Daniel Lezcano <daniel.lezcano@kernel.org>
+L: linux-pm@vger.kernel.org
+S: Supported
+B: https://bugzilla.kernel.org
+T: git git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
+F: drivers/powercap/dtpm*
+F: include/linux/dtpm.h
+
POWER STATE COORDINATION INTERFACE (PSCI)
M: Mark Rutland <mark.rutland@arm.com>
M: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
* - inform the user about the firmware's notion of memory layout
* via /sys/firmware/memmap
*
- * - the hibernation code uses it to generate a kernel-independent MD5
- * fingerprint of the physical memory layout of a system.
+ * - the hibernation code uses it to generate a kernel-independent CRC32
+ * checksum of the physical memory layout of a system.
*
* - 'e820_table_kexec': a slightly modified (by the kernel) firmware version
* passed to us by the bootloader - the major difference between
#include <linux/kdebug.h>
#include <linux/cpu.h>
#include <linux/pgtable.h>
-
-#include <crypto/hash.h>
+#include <linux/types.h>
+#include <linux/crc32.h>
#include <asm/e820/api.h>
#include <asm/init.h>
return pfn >= nosave_begin_pfn && pfn < nosave_end_pfn;
}
-
-#define MD5_DIGEST_SIZE 16
-
struct restore_data_record {
unsigned long jump_address;
unsigned long jump_address_phys;
unsigned long cr3;
unsigned long magic;
- u8 e820_digest[MD5_DIGEST_SIZE];
+ unsigned long e820_checksum;
};
-#if IS_BUILTIN(CONFIG_CRYPTO_MD5)
/**
- * get_e820_md5 - calculate md5 according to given e820 table
+ * compute_e820_crc32 - calculate crc32 of a given e820 table
*
* @table: the e820 table to be calculated
- * @buf: the md5 result to be stored to
+ *
+ * Return: the resulting checksum
*/
-static int get_e820_md5(struct e820_table *table, void *buf)
+static inline u32 compute_e820_crc32(struct e820_table *table)
{
- struct crypto_shash *tfm;
- struct shash_desc *desc;
- int size;
- int ret = 0;
-
- tfm = crypto_alloc_shash("md5", 0, 0);
- if (IS_ERR(tfm))
- return -ENOMEM;
-
- desc = kmalloc(sizeof(struct shash_desc) + crypto_shash_descsize(tfm),
- GFP_KERNEL);
- if (!desc) {
- ret = -ENOMEM;
- goto free_tfm;
- }
-
- desc->tfm = tfm;
-
- size = offsetof(struct e820_table, entries) +
+ int size = offsetof(struct e820_table, entries) +
sizeof(struct e820_entry) * table->nr_entries;
- if (crypto_shash_digest(desc, (u8 *)table, size, buf))
- ret = -EINVAL;
-
- kfree_sensitive(desc);
-
-free_tfm:
- crypto_free_shash(tfm);
- return ret;
-}
-
-static int hibernation_e820_save(void *buf)
-{
- return get_e820_md5(e820_table_firmware, buf);
-}
-
-static bool hibernation_e820_mismatch(void *buf)
-{
- int ret;
- u8 result[MD5_DIGEST_SIZE];
-
- memset(result, 0, MD5_DIGEST_SIZE);
- /* If there is no digest in suspend kernel, let it go. */
- if (!memcmp(result, buf, MD5_DIGEST_SIZE))
- return false;
-
- ret = get_e820_md5(e820_table_firmware, result);
- if (ret)
- return true;
-
- return memcmp(result, buf, MD5_DIGEST_SIZE) ? true : false;
-}
-#else
-static int hibernation_e820_save(void *buf)
-{
- return 0;
-}
-
-static bool hibernation_e820_mismatch(void *buf)
-{
- /* If md5 is not builtin for restore kernel, let it go. */
- return false;
+ return ~crc32_le(~0, (unsigned char const *)table, size);
}
-#endif
#ifdef CONFIG_X86_64
-#define RESTORE_MAGIC 0x23456789ABCDEF01UL
+#define RESTORE_MAGIC 0x23456789ABCDEF02UL
#else
-#define RESTORE_MAGIC 0x12345678UL
+#define RESTORE_MAGIC 0x12345679UL
#endif
/**
*/
rdr->cr3 = restore_cr3 & ~CR3_PCID_MASK;
- return hibernation_e820_save(rdr->e820_digest);
+ rdr->e820_checksum = compute_e820_crc32(e820_table_firmware);
+ return 0;
}
/**
jump_address_phys = rdr->jump_address_phys;
restore_cr3 = rdr->cr3;
- if (hibernation_e820_mismatch(rdr->e820_digest)) {
+ if (rdr->e820_checksum != compute_e820_crc32(e820_table_firmware)) {
pr_crit("Hibernate inconsistent memory map detected!\n");
return -ENODEV;
}
}
/**
- * resume_needed - Check whether to resume a device before system suspend.
- * @dev: Device to check.
- * @genpd: PM domain the device belongs to.
- *
- * There are two cases in which a device that can wake up the system from sleep
- * states should be resumed by genpd_prepare(): (1) if the device is enabled
- * to wake up the system and it has to remain active for this purpose while the
- * system is in the sleep state and (2) if the device is not enabled to wake up
- * the system from sleep states and it generally doesn't generate wakeup signals
- * by itself (those signals are generated on its behalf by other parts of the
- * system). In the latter case it may be necessary to reconfigure the device's
- * wakeup settings during system suspend, because it may have been set up to
- * signal remote wakeup from the system's working state as needed by runtime PM.
- * Return 'true' in either of the above cases.
- */
-static bool resume_needed(struct device *dev,
- const struct generic_pm_domain *genpd)
-{
- bool active_wakeup;
-
- if (!device_can_wakeup(dev))
- return false;
-
- active_wakeup = genpd_is_active_wakeup(genpd);
- return device_may_wakeup(dev) ? active_wakeup : !active_wakeup;
-}
-
-/**
* genpd_prepare - Start power transition of a device in a PM domain.
* @dev: Device to start the transition of.
*
if (IS_ERR(genpd))
return -EINVAL;
- /*
- * If a wakeup request is pending for the device, it should be woken up
- * at this point and a system wakeup event should be reported if it's
- * set up to wake up the system from sleep states.
- */
- if (resume_needed(dev, genpd))
- pm_runtime_resume(dev);
-
genpd_lock(genpd);
if (genpd->prepared_count++ == 0)
struct wakeup_source *ws)
{
struct device *dev = NULL;
- int retval = -ENODEV;
+ int retval;
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (!dev) {
dev_set_drvdata(dev, ws);
device_set_pm_not_required(dev);
- retval = kobject_set_name(&dev->kobj, "wakeup%d", ws->id);
+ retval = dev_set_name(dev, "wakeup%d", ws->id);
if (retval)
goto error;
int err;
int i, bars = 0;
- /*
- * Power state could be unknown at this point, either due to a fresh
- * boot or a device removal call. So get the current power state
- * so that things like MSI message writing will behave as expected
- * (e.g. if the device really is in D0 at enable time).
- */
- if (dev->pm_cap) {
- u16 pmcsr;
- pci_read_config_word(dev, dev->pm_cap + PCI_PM_CTRL, &pmcsr);
- dev->current_state = (pmcsr & PCI_PM_CTRL_STATE_MASK);
- }
-
- if (atomic_inc_return(&dev->enable_cnt) > 1)
+ if (atomic_inc_return(&dev->enable_cnt) > 1) {
+ pci_update_current_state(dev, dev->current_state);
return 0; /* already enabled */
+ }
bridge = pci_upstream_bridge(dev);
if (bridge)
X86_MATCH_VENDOR_FAM(AMD, 0x17, &rapl_defaults_amd),
X86_MATCH_VENDOR_FAM(AMD, 0x19, &rapl_defaults_amd),
+ X86_MATCH_VENDOR_FAM(HYGON, 0x18, &rapl_defaults_amd),
{}
};
MODULE_DEVICE_TABLE(x86cpu, rapl_ids);
case X86_VENDOR_INTEL:
rapl_msr_priv = &rapl_msr_priv_intel;
break;
+ case X86_VENDOR_HYGON:
case X86_VENDOR_AMD:
rapl_msr_priv = &rapl_msr_priv_amd;
break;
static inline void thaw_processes(void) {}
static inline void thaw_kernel_threads(void) {}
-static inline bool try_to_freeze_nowarn(void) { return false; }
static inline bool try_to_freeze(void) { return false; }
static inline void freezer_do_not_count(void) {}
RAPL_DOMAIN_REG_MAX,
};
-struct rapl_package;
+struct rapl_domain;
enum rapl_primitives {
ENERGY_COUNTER,
* Device power management
*/
-struct device;
#ifdef CONFIG_PM
extern const char power_group_name[]; /* = "power" */
static inline void pm_runtime_irq_safe(struct device *dev) {}
static inline bool pm_runtime_is_irq_safe(struct device *dev) { return false; }
-static inline bool pm_runtime_callbacks_present(struct device *dev) { return false; }
+static inline bool pm_runtime_has_no_callbacks(struct device *dev) { return false; }
static inline void pm_runtime_mark_last_busy(struct device *dev) {}
static inline void __pm_runtime_use_autosuspend(struct device *dev,
bool use) {}
goto out;
/*
- * If the wakeup occured for an unknown reason, wait to prevent the
+ * If the wakeup occurred for an unknown reason, wait to prevent the
* system from trying to suspend and waking up in a tight loop.
*/
if (final_count == initial_count)
/**
* Data types related to memory bitmaps.
*
- * Memory bitmap is a structure consiting of many linked lists of
+ * Memory bitmap is a structure consisting of many linked lists of
* objects. The main list's elements are of type struct zone_bitmap
* and each of them corresonds to one zone. For each zone bitmap
* object there is a list of objects of type struct bm_block that
* enough_swap - Make sure we have enough swap to save the image.
*
* Returns TRUE or FALSE after checking the total amount of swap
- * space avaiable from the resume partition.
+ * space available from the resume partition.
*/
static int enough_swap(unsigned int nr_pages)
projects / platform / kernel / linux-rpi.git / commitdiff