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powerpc/powernv: Add support to set power-shifting-ratio

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This patch adds support to set power-shifting-ratio which hints the
firmware how to distribute/throttle power between different entities
in a system (e.g CPU v/s GPU). This ratio is used by OCC for power
capping algorithm.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Shilpasri G Bhat
2017-08-10 09:01:19 +05:30
committed by Michael Ellerman
parent cb8b340de2
commit 8e84b2d1f0
7 changed files with 204 additions and 1 deletions
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3
arch/powerpc/include/asm/opal.h
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@@ -277,6 +277,8 @@ int64_t opal_imc_counters_stop(uint32_t type, uint64_t cpu_pir);
int opal_get_powercap(u32 handle, int token, u32 *pcap);
int opal_set_powercap(u32 handle, int token, u32 pcap);
int opal_get_power_shift_ratio(u32 handle, int token, u32 *psr);
int opal_set_power_shift_ratio(u32 handle, int token, u32 psr);
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
@@ -356,6 +358,7 @@ static inline int opal_get_async_rc(struct opal_msg msg)
void opal_wake_poller(void);
void opal_powercap_init(void);
void opal_psr_init(void);
#endif /* __ASSEMBLY__ */