#ifndef CT_USERMGMT_H #define CT_USERMGMT_H #include #include "curve.h" #include "crypto_hash_sha512.h" enum is_user_enum { USERNAMES_OK = 0, /* Usernames match, valid 'token' */ USERNAMES_NE, /* Usernames do not match */ USERNAMES_TS, /* Usernames match, but 'token' invalid, Drop connection here */ USERNAMES_ERR, }; struct username_struct { uint32_t salt; uint8_t hash[crypto_hash_sha512_BYTES]; }; extern int username_msg(char *username, size_t len, char *dst, size_t dlen); extern enum is_user_enum username_msg_is_user(char *src, size_t slen, char *username, size_t len); extern void parse_userfile_and_generate_user_store_or_die(char *homedir); extern void dump_user_store(void); extern void destroy_user_store(void); extern int get_user_by_socket(int sock, struct curve25519_proto **proto); extern int get_user_by_sockaddr(struct sockaddr_storage *sa, size_t sa_len, struct curve25519_proto **proto); extern int try_register_user_by_socket(struct curve25519_struct *c, char *src, size_t slen, int sock, int log); extern int try_register_user_by_sockaddr(struct curve25519_struct *c, char *src, size_t slen, struct sockaddr_storage *sa, size_t sa_len, int log); extern void remove_user_by_socket(int sock); extern void remove_user_by_sockaddr(struct sockaddr_storage *sa, size_t sa_len); #endif /* CT_USERMGMT_H */ pe='submit' value='switch'/> net-next plumbingsTobias Klauser
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authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-02-03 14:18:39 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100
commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch)
treec666f7a26b860674848949e39a610222b0723f89 /tools/testing/selftests/drivers
parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'tools/testing/selftests/drivers')