mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
b1301797f3
Recent versions of firmware will fail to unmap the virtual processor area if we have a dispatch trace log registered. This causes kexec to fail. If a trace log is registered this patch unregisters it before the SLB shadow and virtual processor areas, fixing the problem. The address argument is ignored by firmware on unregister so we may as well remove it. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: <stable@kernel.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
274 lines
6.5 KiB
C
274 lines
6.5 KiB
C
#ifndef _PSERIES_PLPAR_WRAPPERS_H
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#define _PSERIES_PLPAR_WRAPPERS_H
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#include <asm/hvcall.h>
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#include <asm/page.h>
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/* Get state of physical CPU from query_cpu_stopped */
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int smp_query_cpu_stopped(unsigned int pcpu);
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#define QCSS_STOPPED 0
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#define QCSS_STOPPING 1
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#define QCSS_NOT_STOPPED 2
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#define QCSS_HARDWARE_ERROR -1
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#define QCSS_HARDWARE_BUSY -2
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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()->gpr5_dword.fields.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()->gpr5_dword.fields.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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return plpar_hcall_norets(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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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 are in bits 16-18 (counting from most significant bit) */
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flags = flags << (63 - 18);
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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, unsigned long vpa)
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{
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return vpa_call(0x5, cpu, vpa);
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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(0x1, cpu, vpa);
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}
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static inline long unregister_slb_shadow(unsigned long cpu, unsigned long vpa)
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{
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return vpa_call(0x7, cpu, vpa);
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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(0x3, 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(0x6, 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(0x2, cpu, vpa);
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}
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static inline long plpar_page_set_loaned(unsigned long vpa)
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{
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unsigned long cmo_page_sz = cmo_get_page_size();
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long rc = 0;
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int i;
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for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
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rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED, vpa + i, 0);
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for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
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plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE,
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vpa + i - cmo_page_sz, 0);
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return rc;
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}
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static inline long plpar_page_set_active(unsigned long vpa)
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{
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unsigned long cmo_page_sz = cmo_get_page_size();
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long rc = 0;
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int i;
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for (i = 0; !rc && i < PAGE_SIZE; i += cmo_page_sz)
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rc = plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_ACTIVE, vpa + i, 0);
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for (i -= cmo_page_sz; rc && i != 0; i -= cmo_page_sz)
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plpar_hcall_norets(H_PAGE_INIT, H_PAGE_SET_LOANED,
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vpa + i - cmo_page_sz, 0);
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return rc;
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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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* 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_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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static inline long plpar_get_term_char(unsigned long termno,
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unsigned long *len_ret, char *buf_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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unsigned long *lbuf = (unsigned long *)buf_ret; /* TODO: alignment? */
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rc = plpar_hcall(H_GET_TERM_CHAR, retbuf, termno);
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*len_ret = retbuf[0];
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lbuf[0] = retbuf[1];
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lbuf[1] = retbuf[2];
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return rc;
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}
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static inline long plpar_put_term_char(unsigned long termno, unsigned long len,
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const char *buffer)
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{
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unsigned long *lbuf = (unsigned long *)buffer; /* TODO: alignment? */
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return plpar_hcall_norets(H_PUT_TERM_CHAR, termno, len, lbuf[0],
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lbuf[1]);
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}
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#endif /* _PSERIES_PLPAR_WRAPPERS_H */
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