mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-03 17:40:04 +00:00
![Pratik R. Sampat](/assets/img/avatar_default.png)
Adds a syscall interface to represent the energy and frequency related PAPR attributes on the system using the new H_CALL "H_GET_ENERGY_SCALE_INFO". H_GET_EM_PARMS H_CALL was previously responsible for exporting this information in the lparcfg, however the H_GET_EM_PARMS H_CALL will be deprecated P10 onwards. The H_GET_ENERGY_SCALE_INFO H_CALL is of the following call format: hcall( uint64 H_GET_ENERGY_SCALE_INFO, // Get energy scale info uint64 flags, // Per the flag request uint64 firstAttributeId,// The attribute id uint64 bufferAddress, // Guest physical address of the output buffer uint64 bufferSize // The size in bytes of the output buffer ); As specified in PAPR+ v2.11, section 14.14.3. This H_CALL can query either all the attributes at once with firstAttributeId = 0, flags = 0 as well as query only one attribute at a time with firstAttributeId = id, flags = 1. The output buffer consists of the following 1. number of attributes - 8 bytes 2. array offset to the data location - 8 bytes 3. version info - 1 byte 4. A data array of size num attributes, which contains the following: a. attribute ID - 8 bytes b. attribute value in number - 8 bytes c. attribute name in string - 64 bytes d. attribute value in string - 64 bytes The new H_CALL exports information in direct string value format, hence a new interface has been introduced in /sys/firmware/papr/energy_scale_info to export this information to userspace so that the firmware can add new values without the need for the kernel to be changed. The H_CALL returns the name, numeric value and string value (if exists) The format of exposing the sysfs information is as follows: /sys/firmware/papr/energy_scale_info/ |-- <id>/ |-- desc |-- value |-- value_desc (if exists) |-- <id>/ |-- desc |-- value |-- value_desc (if exists) ... The energy information that is exported is useful for userspace tools such as powerpc-utils. Currently these tools infer the "power_mode_data" value in the lparcfg, which in turn is obtained from the to be deprecated H_GET_EM_PARMS H_CALL. On future platforms, such userspace utilities will have to look at the data returned from the new H_CALL being populated in this new sysfs interface and report this information directly without the need of interpretation. Signed-off-by: Pratik R. Sampat <psampat@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20220217105321.52941-2-psampat@linux.ibm.com
140 lines
5.1 KiB
C
140 lines
5.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* Copyright (C) 2001 Ben. Herrenschmidt (benh@kernel.crashing.org)
|
|
*
|
|
* Modifications for ppc64:
|
|
* Copyright (C) 2003 Dave Engebretsen <engebret@us.ibm.com>
|
|
*/
|
|
#ifndef __ASM_POWERPC_FIRMWARE_H
|
|
#define __ASM_POWERPC_FIRMWARE_H
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
#include <asm/asm-const.h>
|
|
|
|
/* firmware feature bitmask values */
|
|
|
|
#define FW_FEATURE_PFT ASM_CONST(0x0000000000000001)
|
|
#define FW_FEATURE_TCE ASM_CONST(0x0000000000000002)
|
|
#define FW_FEATURE_SPRG0 ASM_CONST(0x0000000000000004)
|
|
#define FW_FEATURE_DABR ASM_CONST(0x0000000000000008)
|
|
#define FW_FEATURE_COPY ASM_CONST(0x0000000000000010)
|
|
#define FW_FEATURE_ASR ASM_CONST(0x0000000000000020)
|
|
#define FW_FEATURE_DEBUG ASM_CONST(0x0000000000000040)
|
|
#define FW_FEATURE_TERM ASM_CONST(0x0000000000000080)
|
|
#define FW_FEATURE_PERF ASM_CONST(0x0000000000000100)
|
|
#define FW_FEATURE_DUMP ASM_CONST(0x0000000000000200)
|
|
#define FW_FEATURE_INTERRUPT ASM_CONST(0x0000000000000400)
|
|
#define FW_FEATURE_MIGRATE ASM_CONST(0x0000000000000800)
|
|
#define FW_FEATURE_PERFMON ASM_CONST(0x0000000000001000)
|
|
#define FW_FEATURE_CRQ ASM_CONST(0x0000000000002000)
|
|
#define FW_FEATURE_VIO ASM_CONST(0x0000000000004000)
|
|
#define FW_FEATURE_RDMA ASM_CONST(0x0000000000008000)
|
|
#define FW_FEATURE_LLAN ASM_CONST(0x0000000000010000)
|
|
#define FW_FEATURE_BULK_REMOVE ASM_CONST(0x0000000000020000)
|
|
#define FW_FEATURE_XDABR ASM_CONST(0x0000000000040000)
|
|
#define FW_FEATURE_PUT_TCE_IND ASM_CONST(0x0000000000080000)
|
|
#define FW_FEATURE_SPLPAR ASM_CONST(0x0000000000100000)
|
|
#define FW_FEATURE_LPAR ASM_CONST(0x0000000000400000)
|
|
#define FW_FEATURE_PS3_LV1 ASM_CONST(0x0000000000800000)
|
|
#define FW_FEATURE_HPT_RESIZE ASM_CONST(0x0000000001000000)
|
|
#define FW_FEATURE_CMO ASM_CONST(0x0000000002000000)
|
|
#define FW_FEATURE_VPHN ASM_CONST(0x0000000004000000)
|
|
#define FW_FEATURE_XCMO ASM_CONST(0x0000000008000000)
|
|
#define FW_FEATURE_OPAL ASM_CONST(0x0000000010000000)
|
|
#define FW_FEATURE_SET_MODE ASM_CONST(0x0000000040000000)
|
|
#define FW_FEATURE_BEST_ENERGY ASM_CONST(0x0000000080000000)
|
|
#define FW_FEATURE_FORM1_AFFINITY ASM_CONST(0x0000000100000000)
|
|
#define FW_FEATURE_PRRN ASM_CONST(0x0000000200000000)
|
|
#define FW_FEATURE_DRMEM_V2 ASM_CONST(0x0000000400000000)
|
|
#define FW_FEATURE_DRC_INFO ASM_CONST(0x0000000800000000)
|
|
#define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000)
|
|
#define FW_FEATURE_PAPR_SCM ASM_CONST(0x0000002000000000)
|
|
#define FW_FEATURE_ULTRAVISOR ASM_CONST(0x0000004000000000)
|
|
#define FW_FEATURE_STUFF_TCE ASM_CONST(0x0000008000000000)
|
|
#define FW_FEATURE_RPT_INVALIDATE ASM_CONST(0x0000010000000000)
|
|
#define FW_FEATURE_FORM2_AFFINITY ASM_CONST(0x0000020000000000)
|
|
#define FW_FEATURE_ENERGY_SCALE_INFO ASM_CONST(0x0000040000000000)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
enum {
|
|
#ifdef CONFIG_PPC64
|
|
FW_FEATURE_PSERIES_POSSIBLE = FW_FEATURE_PFT | FW_FEATURE_TCE |
|
|
FW_FEATURE_SPRG0 | FW_FEATURE_DABR | FW_FEATURE_COPY |
|
|
FW_FEATURE_ASR | FW_FEATURE_DEBUG | FW_FEATURE_TERM |
|
|
FW_FEATURE_PERF | FW_FEATURE_DUMP | FW_FEATURE_INTERRUPT |
|
|
FW_FEATURE_MIGRATE | FW_FEATURE_PERFMON | FW_FEATURE_CRQ |
|
|
FW_FEATURE_VIO | FW_FEATURE_RDMA | FW_FEATURE_LLAN |
|
|
FW_FEATURE_BULK_REMOVE | FW_FEATURE_XDABR |
|
|
FW_FEATURE_PUT_TCE_IND | FW_FEATURE_STUFF_TCE |
|
|
FW_FEATURE_SPLPAR | FW_FEATURE_LPAR |
|
|
FW_FEATURE_CMO | FW_FEATURE_VPHN | FW_FEATURE_XCMO |
|
|
FW_FEATURE_SET_MODE | FW_FEATURE_BEST_ENERGY |
|
|
FW_FEATURE_FORM1_AFFINITY | FW_FEATURE_PRRN |
|
|
FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
|
|
FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
|
|
FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR |
|
|
FW_FEATURE_RPT_INVALIDATE | FW_FEATURE_FORM2_AFFINITY |
|
|
FW_FEATURE_ENERGY_SCALE_INFO,
|
|
FW_FEATURE_PSERIES_ALWAYS = 0,
|
|
FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR,
|
|
FW_FEATURE_POWERNV_ALWAYS = 0,
|
|
FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
|
|
FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
|
|
FW_FEATURE_POSSIBLE =
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
FW_FEATURE_PSERIES_POSSIBLE |
|
|
#endif
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
FW_FEATURE_POWERNV_POSSIBLE |
|
|
#endif
|
|
#ifdef CONFIG_PPC_PS3
|
|
FW_FEATURE_PS3_POSSIBLE |
|
|
#endif
|
|
0,
|
|
FW_FEATURE_ALWAYS =
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
FW_FEATURE_PSERIES_ALWAYS &
|
|
#endif
|
|
#ifdef CONFIG_PPC_POWERNV
|
|
FW_FEATURE_POWERNV_ALWAYS &
|
|
#endif
|
|
#ifdef CONFIG_PPC_PS3
|
|
FW_FEATURE_PS3_ALWAYS &
|
|
#endif
|
|
FW_FEATURE_POSSIBLE,
|
|
|
|
#else /* CONFIG_PPC64 */
|
|
FW_FEATURE_POSSIBLE = 0,
|
|
FW_FEATURE_ALWAYS = 0,
|
|
#endif
|
|
};
|
|
|
|
/* This is used to identify firmware features which are available
|
|
* to the kernel.
|
|
*/
|
|
extern unsigned long powerpc_firmware_features;
|
|
|
|
#define firmware_has_feature(feature) \
|
|
((FW_FEATURE_ALWAYS & (feature)) || \
|
|
(FW_FEATURE_POSSIBLE & powerpc_firmware_features & (feature)))
|
|
|
|
extern void system_reset_fwnmi(void);
|
|
extern void machine_check_fwnmi(void);
|
|
|
|
/* This is true if we are using the firmware NMI handler (typically LPAR) */
|
|
extern int fwnmi_active;
|
|
extern int ibm_nmi_interlock_token;
|
|
|
|
extern unsigned int __start___fw_ftr_fixup, __stop___fw_ftr_fixup;
|
|
|
|
#ifdef CONFIG_PPC_PSERIES
|
|
void pseries_probe_fw_features(void);
|
|
#else
|
|
static inline void pseries_probe_fw_features(void) { }
|
|
#endif
|
|
|
|
#endif /* __ASSEMBLY__ */
|
|
#endif /* __KERNEL__ */
|
|
#endif /* __ASM_POWERPC_FIRMWARE_H */
|