a43c159042
On pseries, as of today system crashes if we get a machine check exceptions due to SLB errors. These are soft errors and can be fixed by flushing the SLBs so the kernel can continue to function instead of system crash. We do this in real mode before turning on MMU. Otherwise we would run into nested machine checks. This patch now fetches the rtas error log in real mode and flushes the SLBs on SLB/ERAT errors. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: Michal Suchanek <msuchanek@suse.com> Reviewed-by: Nicholas Piggin <npiggin@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
115 lines
2.9 KiB
C
115 lines
2.9 KiB
C
/*
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* Copyright 2006 IBM Corporation.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _PSERIES_PSERIES_H
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#define _PSERIES_PSERIES_H
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#include <linux/interrupt.h>
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#include <asm/rtas.h>
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struct device_node;
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extern void request_event_sources_irqs(struct device_node *np,
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irq_handler_t handler, const char *name);
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#include <linux/of.h>
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struct pt_regs;
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extern int pSeries_system_reset_exception(struct pt_regs *regs);
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extern int pSeries_machine_check_exception(struct pt_regs *regs);
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extern long pseries_machine_check_realmode(struct pt_regs *regs);
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#ifdef CONFIG_SMP
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extern void smp_init_pseries(void);
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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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#else
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static inline void smp_init_pseries(void) { };
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#endif
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extern void pseries_kexec_cpu_down(int crash_shutdown, int secondary);
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extern void pSeries_final_fixup(void);
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/* Poweron flag used for enabling auto ups restart */
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extern unsigned long rtas_poweron_auto;
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/* Provided by HVC VIO */
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extern void hvc_vio_init_early(void);
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/* Dynamic logical Partitioning/Mobility */
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extern void dlpar_free_cc_nodes(struct device_node *);
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extern void dlpar_free_cc_property(struct property *);
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extern struct device_node *dlpar_configure_connector(__be32,
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struct device_node *);
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extern int dlpar_attach_node(struct device_node *, struct device_node *);
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extern int dlpar_detach_node(struct device_node *);
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extern int dlpar_acquire_drc(u32 drc_index);
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extern int dlpar_release_drc(u32 drc_index);
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void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog,
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struct completion *hotplug_done, int *rc);
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#ifdef CONFIG_MEMORY_HOTPLUG
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int dlpar_memory(struct pseries_hp_errorlog *hp_elog);
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#else
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static inline int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
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{
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return -EOPNOTSUPP;
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}
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#endif
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#ifdef CONFIG_HOTPLUG_CPU
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int dlpar_cpu(struct pseries_hp_errorlog *hp_elog);
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#else
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static inline int dlpar_cpu(struct pseries_hp_errorlog *hp_elog)
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{
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return -EOPNOTSUPP;
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}
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#endif
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/* PCI root bridge prepare function override for pseries */
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struct pci_host_bridge;
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int pseries_root_bridge_prepare(struct pci_host_bridge *bridge);
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extern struct pci_controller_ops pseries_pci_controller_ops;
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unsigned long pseries_memory_block_size(void);
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extern int CMO_PrPSP;
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extern int CMO_SecPSP;
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extern unsigned long CMO_PageSize;
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static inline int cmo_get_primary_psp(void)
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{
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return CMO_PrPSP;
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}
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static inline int cmo_get_secondary_psp(void)
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{
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return CMO_SecPSP;
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}
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static inline unsigned long cmo_get_page_size(void)
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{
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return CMO_PageSize;
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}
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int dlpar_workqueue_init(void);
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void pseries_setup_rfi_flush(void);
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#endif /* _PSERIES_PSERIES_H */
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