mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-22 21:47:04 +07:00
53ce299615
This has not made its way to a PAPR release yet, but we have an hcall
number assigned.
H_SIGNAL_SYS_RESET = 0x380
Syntax:
hcall(uint64 H_SIGNAL_SYS_RESET, int64 target);
Generate a system reset NMI on the threads indicated by target.
Values for target:
-1 = target all online threads including the caller
-2 = target all online threads except for the caller
All other negative values: reserved
Positive values: The thread to be targeted, obtained from the value
of the "ibm,ppc-interrupt-server#s" property of the CPU in the OF
device tree.
Semantics:
- Invalid target: return H_Parameter.
- Otherwise: Generate a system reset NMI on target thread(s),
return H_Success.
This will be used by crash/debug code to get stuck CPUs into a known
state.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
317 lines
7.7 KiB
C
317 lines
7.7 KiB
C
#ifndef _ASM_POWERPC_PLPAR_WRAPPERS_H
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#define _ASM_POWERPC_PLPAR_WRAPPERS_H
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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/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()->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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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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#ifdef CONFIG_TRACE_IRQFLAGS
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/* Ensure that H_CEDE returns with IRQs on */
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if (WARN_ON(!(mfmsr() & MSR_EE)))
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__hard_irq_enable();
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#endif
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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_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 plapr_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 plapr_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_DAWR, dawr0, dawrx0);
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}
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static inline long plapr_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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#endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */
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