413 lines
10 KiB
C
413 lines
10 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H
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#define _ASM_POWERPC_PLPAR_WRAPPERS_H
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#ifdef CONFIG_PPC_PSERIES
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#include <linux/string.h>
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#include <linux/irqflags.h>
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#include <asm/hvcall.h>
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#include <asm/paca.h>
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#include <asm/lppaca.h>
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#include <asm/page.h>
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static inline long poll_pending(void)
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{
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return plpar_hcall_norets(H_POLL_PENDING);
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}
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static inline u8 get_cede_latency_hint(void)
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{
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return get_lppaca()->cede_latency_hint;
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}
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static inline void set_cede_latency_hint(u8 latency_hint)
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{
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get_lppaca()->cede_latency_hint = latency_hint;
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}
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static inline long cede_processor(void)
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{
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/*
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* We cannot call tracepoints inside RCU idle regions which
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* means we must not trace H_CEDE.
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*/
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return plpar_hcall_norets_notrace(H_CEDE);
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}
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static inline long extended_cede_processor(unsigned long latency_hint)
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{
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long rc;
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u8 old_latency_hint = get_cede_latency_hint();
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set_cede_latency_hint(latency_hint);
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rc = cede_processor();
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/* Ensure that H_CEDE returns with IRQs on */
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if (WARN_ON(IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) && !(mfmsr() & MSR_EE)))
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__hard_irq_enable();
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set_cede_latency_hint(old_latency_hint);
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return rc;
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}
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static inline long vpa_call(unsigned long flags, unsigned long cpu,
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unsigned long vpa)
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{
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flags = flags << H_VPA_FUNC_SHIFT;
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return plpar_hcall_norets(H_REGISTER_VPA, flags, cpu, vpa);
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}
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static inline long unregister_vpa(unsigned long cpu)
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{
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return vpa_call(H_VPA_DEREG_VPA, cpu, 0);
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}
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static inline long register_vpa(unsigned long cpu, unsigned long vpa)
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{
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return vpa_call(H_VPA_REG_VPA, cpu, vpa);
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}
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static inline long unregister_slb_shadow(unsigned long cpu)
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{
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return vpa_call(H_VPA_DEREG_SLB, cpu, 0);
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}
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static inline long register_slb_shadow(unsigned long cpu, unsigned long vpa)
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{
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return vpa_call(H_VPA_REG_SLB, cpu, vpa);
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}
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static inline long unregister_dtl(unsigned long cpu)
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{
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return vpa_call(H_VPA_DEREG_DTL, cpu, 0);
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}
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static inline long register_dtl(unsigned long cpu, unsigned long vpa)
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{
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return vpa_call(H_VPA_REG_DTL, cpu, vpa);
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}
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extern void vpa_init(int cpu);
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static inline long plpar_pte_enter(unsigned long flags,
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unsigned long hpte_group, unsigned long hpte_v,
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unsigned long hpte_r, unsigned long *slot)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_ENTER, retbuf, flags, hpte_group, hpte_v, hpte_r);
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*slot = retbuf[0];
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return rc;
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}
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static inline long plpar_pte_remove(unsigned long flags, unsigned long ptex,
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unsigned long avpn, unsigned long *old_pteh_ret,
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unsigned long *old_ptel_ret)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_REMOVE, retbuf, flags, ptex, avpn);
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*old_pteh_ret = retbuf[0];
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*old_ptel_ret = retbuf[1];
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return rc;
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}
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/* plpar_pte_remove_raw can be called in real mode. It calls plpar_hcall_raw */
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static inline long plpar_pte_remove_raw(unsigned long flags, unsigned long ptex,
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unsigned long avpn, unsigned long *old_pteh_ret,
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unsigned long *old_ptel_ret)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall_raw(H_REMOVE, retbuf, flags, ptex, avpn);
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*old_pteh_ret = retbuf[0];
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*old_ptel_ret = retbuf[1];
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return rc;
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}
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static inline long plpar_pte_read(unsigned long flags, unsigned long ptex,
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unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_READ, retbuf, flags, ptex);
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*old_pteh_ret = retbuf[0];
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*old_ptel_ret = retbuf[1];
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return rc;
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}
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/* plpar_pte_read_raw can be called in real mode. It calls plpar_hcall_raw */
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static inline long plpar_pte_read_raw(unsigned long flags, unsigned long ptex,
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unsigned long *old_pteh_ret, unsigned long *old_ptel_ret)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall_raw(H_READ, retbuf, flags, ptex);
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*old_pteh_ret = retbuf[0];
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*old_ptel_ret = retbuf[1];
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return rc;
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}
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/*
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* ptes must be 8*sizeof(unsigned long)
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*/
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static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
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unsigned long *ptes)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
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rc = plpar_hcall9(H_READ, retbuf, flags | H_READ_4, ptex);
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memcpy(ptes, retbuf, 8*sizeof(unsigned long));
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return rc;
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}
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/*
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* plpar_pte_read_4_raw can be called in real mode.
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* ptes must be 8*sizeof(unsigned long)
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*/
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static inline long plpar_pte_read_4_raw(unsigned long flags, unsigned long ptex,
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unsigned long *ptes)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL9_BUFSIZE];
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rc = plpar_hcall9_raw(H_READ, retbuf, flags | H_READ_4, ptex);
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memcpy(ptes, retbuf, 8*sizeof(unsigned long));
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return rc;
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}
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static inline long plpar_pte_protect(unsigned long flags, unsigned long ptex,
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unsigned long avpn)
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{
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return plpar_hcall_norets(H_PROTECT, flags, ptex, avpn);
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}
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static inline long plpar_resize_hpt_prepare(unsigned long flags,
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unsigned long shift)
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{
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return plpar_hcall_norets(H_RESIZE_HPT_PREPARE, flags, shift);
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}
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static inline long plpar_resize_hpt_commit(unsigned long flags,
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unsigned long shift)
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{
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return plpar_hcall_norets(H_RESIZE_HPT_COMMIT, flags, shift);
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}
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static inline long plpar_tce_get(unsigned long liobn, unsigned long ioba,
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unsigned long *tce_ret)
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{
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long rc;
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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rc = plpar_hcall(H_GET_TCE, retbuf, liobn, ioba);
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*tce_ret = retbuf[0];
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return rc;
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}
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static inline long plpar_tce_put(unsigned long liobn, unsigned long ioba,
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unsigned long tceval)
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{
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return plpar_hcall_norets(H_PUT_TCE, liobn, ioba, tceval);
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}
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static inline long plpar_tce_put_indirect(unsigned long liobn,
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unsigned long ioba, unsigned long page, unsigned long count)
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{
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return plpar_hcall_norets(H_PUT_TCE_INDIRECT, liobn, ioba, page, count);
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}
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static inline long plpar_tce_stuff(unsigned long liobn, unsigned long ioba,
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unsigned long tceval, unsigned long count)
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{
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return plpar_hcall_norets(H_STUFF_TCE, liobn, ioba, tceval, count);
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}
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/* Set various resource mode parameters */
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static inline long plpar_set_mode(unsigned long mflags, unsigned long resource,
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unsigned long value1, unsigned long value2)
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{
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return plpar_hcall_norets(H_SET_MODE, mflags, resource, value1, value2);
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}
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/*
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* Enable relocation on exceptions on this partition
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*
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* Note: this call has a partition wide scope and can take a while to complete.
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* If it returns H_LONG_BUSY_* it should be retried periodically until it
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* returns H_SUCCESS.
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*/
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static inline long enable_reloc_on_exceptions(void)
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{
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/* mflags = 3: Exceptions at 0xC000000000004000 */
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return plpar_set_mode(3, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
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}
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/*
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* Disable relocation on exceptions on this partition
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*
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* Note: this call has a partition wide scope and can take a while to complete.
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* If it returns H_LONG_BUSY_* it should be retried periodically until it
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* returns H_SUCCESS.
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*/
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static inline long disable_reloc_on_exceptions(void) {
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return plpar_set_mode(0, H_SET_MODE_RESOURCE_ADDR_TRANS_MODE, 0, 0);
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}
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/*
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* Take exceptions in big endian mode on this partition
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*
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* Note: this call has a partition wide scope and can take a while to complete.
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* If it returns H_LONG_BUSY_* it should be retried periodically until it
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* returns H_SUCCESS.
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*/
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static inline long enable_big_endian_exceptions(void)
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{
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/* mflags = 0: big endian exceptions */
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return plpar_set_mode(0, H_SET_MODE_RESOURCE_LE, 0, 0);
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}
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/*
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* Take exceptions in little endian mode on this partition
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*
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* Note: this call has a partition wide scope and can take a while to complete.
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* If it returns H_LONG_BUSY_* it should be retried periodically until it
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* returns H_SUCCESS.
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*/
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static inline long enable_little_endian_exceptions(void)
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{
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/* mflags = 1: little endian exceptions */
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return plpar_set_mode(1, H_SET_MODE_RESOURCE_LE, 0, 0);
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}
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static inline long plpar_set_ciabr(unsigned long ciabr)
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{
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return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_CIABR, ciabr, 0);
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}
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static inline long plpar_set_watchpoint0(unsigned long dawr0, unsigned long dawrx0)
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{
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return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR0, dawr0, dawrx0);
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}
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static inline long plpar_set_watchpoint1(unsigned long dawr1, unsigned long dawrx1)
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{
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return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR1, dawr1, dawrx1);
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}
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static inline long plpar_signal_sys_reset(long cpu)
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{
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return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu);
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}
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static inline long plpar_get_cpu_characteristics(struct h_cpu_char_result *p)
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{
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unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
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long rc;
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rc = plpar_hcall(H_GET_CPU_CHARACTERISTICS, retbuf);
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if (rc == H_SUCCESS) {
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p->character = retbuf[0];
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p->behaviour = retbuf[1];
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}
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return rc;
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}
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/*
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* Wrapper to H_RPT_INVALIDATE hcall that handles return values appropriately
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*
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* - Returns H_SUCCESS on success
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* - For H_BUSY return value, we retry the hcall.
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* - For any other hcall failures, attempt a full flush once before
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* resorting to BUG().
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*
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* Note: This hcall is expected to fail only very rarely. The correct
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* error recovery of killing the process/guest will be eventually
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* needed.
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*/
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static inline long pseries_rpt_invalidate(u32 pid, u64 target, u64 type,
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u64 page_sizes, u64 start, u64 end)
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{
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long rc;
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unsigned long all;
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while (true) {
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rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target, type,
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page_sizes, start, end);
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if (rc == H_BUSY) {
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cpu_relax();
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continue;
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} else if (rc == H_SUCCESS)
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return rc;
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/* Flush request failed, try with a full flush once */
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if (type & H_RPTI_TYPE_NESTED)
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all = H_RPTI_TYPE_NESTED | H_RPTI_TYPE_NESTED_ALL;
|
||
|
|
else
|
||
|
|
all = H_RPTI_TYPE_ALL;
|
||
|
|
retry:
|
||
|
|
rc = plpar_hcall_norets(H_RPT_INVALIDATE, pid, target,
|
||
|
|
all, page_sizes, 0, -1UL);
|
||
|
|
if (rc == H_BUSY) {
|
||
|
|
cpu_relax();
|
||
|
|
goto retry;
|
||
|
|
} else if (rc == H_SUCCESS)
|
||
|
|
return rc;
|
||
|
|
|
||
|
|
BUG();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#else /* !CONFIG_PPC_PSERIES */
|
||
|
|
|
||
|
|
static inline long plpar_set_ciabr(unsigned long ciabr)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long plpar_pte_read_4(unsigned long flags, unsigned long ptex,
|
||
|
|
unsigned long *ptes)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline long pseries_rpt_invalidate(u32 pid, u64 target, u64 type,
|
||
|
|
u64 page_sizes, u64 start, u64 end)
|
||
|
|
{
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif /* CONFIG_PPC_PSERIES */
|
||
|
|
|
||
|
|
#endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */
|