/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H #define _ASM_POWERPC_PLPAR_WRAPPERS_H #ifdef CONFIG_PPC_PSERIES #include #include #include #include #include static inline long poll_pending(void) { return plpar_hcall_norets(H_POLL_PENDING); } static inline u8 get_cede_latency_hint(void) { return get_lppaca()->cede_latency_hint; } static inline void set_cede_latency_hint(u8 latency_hint) { get_lppaca()->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(); #ifdef CONFIG_TRACE_IRQFLAGS /* Ensure that H_CEDE returns with IRQs on */ if (WARN_ON(!(mfmsr() & MSR_EE))) __hard_irq_enable(); #endif set_cede_latency_hint(old_latency_hint); return rc; } static inline long vpa_call(unsigned long flags, unsigned long cpu, unsigned long vpa) { flags = flags << H_VPA_FUNC_SHIFT; return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa); } static inline long unregister_vpa(unsigned long cpu) { return vpa_call(H_VPA_DEREG_VPA, cpu, 0); } static inline long register_vpa(unsigned long cpu, unsigned long vpa) { return vpa_call(H_VPA_REG_VPA, cpu, vpa); } static inline long unregister_slb_shadow(unsigned long cpu) { return vpa_call(H_VPA_DEREG_SLB, cpu, 0); } static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa) { return vpa_call(H_VPA_REG_SLB, cpu, vpa); } static inline long unregister_dtl(unsigned long cpu) { return vpa_call(H_VPA_DEREG_DTL, cpu, 0); } static inline long register_dtl(unsigned long cpu, unsigned long vpa) { return vpa_call(H_VPA_REG_DTL, cpu, vpa); } extern void vpa_init(int cpu); static inline long plpar_pte_enter(unsigned long flags, unsigned long hpte_group, unsigned long hpte_v, unsigned long hpte_r, unsigned long *slot) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r); *slot = retbuf[0]; return rc; } static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex, unsigned long avpn, unsigned long *old_pteh_ret, unsigned long *old_ptel_ret) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn); *old_pteh_ret = retbuf[0]; *old_ptel_ret = retbuf[1]; return rc; } /* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */ static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex, unsigned long avpn, unsigned long *old_pteh_ret, unsigned long *old_ptel_ret) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn); *old_pteh_ret = retbuf[0]; *old_ptel_ret = retbuf[1]; return rc; } static inline long plpar_pte_read(unsigned long flags, unsigned long ptex, unsigned long *old_pteh_ret, unsigned long *old_ptel_ret) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall(H_READ, retbuf, flags, ptex); *old_pteh_ret = retbuf[0]; *old_ptel_ret = retbuf[1]; return rc; } /* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */ static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex, unsigned long *old_pteh_ret, unsigned long *old_ptel_ret) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex); *old_pteh_ret = retbuf[0]; *old_ptel_ret = retbuf[1]; return rc; } /* * ptes must be 8*sizeof(unsigned long) */ static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex, unsigned long *ptes) { long rc; unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex); memcpy(ptes, retbuf, 8*sizeof(unsigned long)); return rc; } /* * plpar_pte_read_4_raw can be called in real mode. * ptes must be 8*sizeof(unsigned long) */ static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex, unsigned long *ptes) { long rc; unsigned long retbuf[PLPAR_HCALL9_BUFSIZE]; rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex); memcpy(ptes, retbuf, 8*sizeof(unsigned long)); return rc; } static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex, unsigned long avpn) { return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn); } static inline long plpar_resize_hpt_prepare(unsigned long flags, unsigned long shift) { return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift); } static inline long plpar_resize_hpt_commit(unsigned long flags, unsigned long shift) { return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift); } static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba, unsigned long *tce_ret) { long rc; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba); *tce_ret = retbuf[0]; return rc; } static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba, unsigned long tceval) { return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval); } static inline long plpar_tce_put_indirect(unsigned long liobn, unsigned long ioba, unsigned long page, unsigned long count) { return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count); } static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba, unsigned long tceval, unsigned long count) { return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count); } /* Set various resource mode parameters */ static inline long plpar_set_mode(unsigned long mflags, unsigned long resource, unsigned long value1, unsigned long value2) { return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2); } /* * Enable relocation on exceptions on this partition * * Note: this call has a partition wide scope and can take a while to complete. * If it returns H_LONG_BUSY_* it should be retried periodically until it * returns H_SUCCESS. */ static inline long enable_reloc_on_exceptions(void) { /* mflags = 3: Exceptions at 0xC000000000004000 */ return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0); } /* * Disable relocation on exceptions on this partition * * Note: this call has a partition wide scope and can take a while to complete. * If it returns H_LONG_BUSY_* it should be retried periodically until it * returns H_SUCCESS. */ static inline long disable_reloc_on_exceptions(void) { return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0); } /* * Take exceptions in big endian mode on this partition * * Note: this call has a partition wide scope and can take a while to complete. * If it returns H_LONG_BUSY_* it should be retried periodically until it * returns H_SUCCESS. */ static inline long enable_big_endian_exceptions(void) { /* mflags = 0: big endian exceptions */ return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0); } /* * Take exceptions in little endian mode on this partition * * Note: this call has a partition wide scope and can take a while to complete. * If it returns H_LONG_BUSY_* it should be retried periodically until it * returns H_SUCCESS. */ static inline long enable_little_endian_exceptions(void) { /* mflags = 1: little endian exceptions */ return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0); } static inline long plpar_set_ciabr(unsigned long ciabr) { return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0); } static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0) { return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0); } static inline long plpar_signal_sys_reset(long cpu) { return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu); } static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p) { unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; long rc; rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf); if (rc == H_SUCCESS) { p->character = retbuf[0]; p->behaviour = retbuf[1]; } return rc; } #else /* !CONFIG_PPC_PSERIES */ static inline long plpar_set_ciabr(unsigned long ciabr) { return 0; } #endif /* CONFIG_PPC_PSERIES */ #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */