diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/plpar_wrappers.h')
| -rw-r--r-- | arch/powerpc/platforms/pseries/plpar_wrappers.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/plpar_wrappers.h b/arch/powerpc/platforms/pseries/plpar_wrappers.h index a24a6b2333b..0603c91538a 100644 --- a/arch/powerpc/platforms/pseries/plpar_wrappers.h +++ b/arch/powerpc/platforms/pseries/plpar_wrappers.h @@ -9,11 +9,33 @@ static inline long poll_pending(void) return plpar_hcall_norets(H_POLL_PENDING); } +static inline u8 get_cede_latency_hint(void) +{ + return get_lppaca()->gpr5_dword.fields.cede_latency_hint; +} + +static inline void set_cede_latency_hint(u8 latency_hint) +{ + get_lppaca()->gpr5_dword.fields.cede_latency_hint = latency_hint; +} + static inline long cede_processor(void) { return plpar_hcall_norets(H_CEDE); } +static inline long extended_cede_processor(unsigned long latency_hint) +{ + long rc; + u8 old_latency_hint = get_cede_latency_hint(); + + set_cede_latency_hint(latency_hint); + rc = cede_processor(); + set_cede_latency_hint(old_latency_hint); + + return rc; +} + static inline long vpa_call(unsigned long flags, unsigned long cpu, unsigned long vpa) { |