diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/setup.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/setup.c | 97 |
1 files changed, 91 insertions, 6 deletions
diff --git a/arch/powerpc/platforms/pseries/setup.c b/arch/powerpc/platforms/pseries/setup.c index e3cb7ae61658..8bcc9ca6682f 100644 --- a/arch/powerpc/platforms/pseries/setup.c +++ b/arch/powerpc/platforms/pseries/setup.c @@ -40,6 +40,8 @@ #include <linux/seq_file.h> #include <linux/root_dev.h> #include <linux/cpuidle.h> +#include <linux/of.h> +#include <linux/kexec.h> #include <asm/mmu.h> #include <asm/processor.h> @@ -63,7 +65,7 @@ #include <asm/smp.h> #include <asm/firmware.h> #include <asm/eeh.h> -#include <asm/pSeries_reconfig.h> +#include <asm/reg.h> #include "plpar_wrappers.h" #include "pseries.h" @@ -258,7 +260,7 @@ static int pci_dn_reconfig_notifier(struct notifier_block *nb, unsigned long act int err = NOTIFY_OK; switch (action) { - case PSERIES_RECONFIG_ADD: + case OF_RECONFIG_ATTACH_NODE: pci = np->parent->data; if (pci) { update_dn_pci_info(np, pci->phb); @@ -280,7 +282,7 @@ static struct notifier_block pci_dn_reconfig_nb = { struct kmem_cache *dtl_cache; -#ifdef CONFIG_VIRT_CPU_ACCOUNTING +#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE /* * Allocate space for the dispatch trace log for all possible cpus * and register the buffers with the hypervisor. This is used for @@ -331,12 +333,12 @@ static int alloc_dispatch_logs(void) return 0; } -#else /* !CONFIG_VIRT_CPU_ACCOUNTING */ +#else /* !CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ static inline int alloc_dispatch_logs(void) { return 0; } -#endif /* CONFIG_VIRT_CPU_ACCOUNTING */ +#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */ static int alloc_dispatch_log_kmem_cache(void) { @@ -367,6 +369,67 @@ static void pSeries_idle(void) } } +/* + * Enable relocation on during exceptions. This has partition wide scope and + * may take a while to complete, if it takes longer than one second we will + * just give up rather than wasting any more time on this - if that turns out + * to ever be a problem in practice we can move this into a kernel thread to + * finish off the process later in boot. + */ +long pSeries_enable_reloc_on_exc(void) +{ + long rc; + unsigned int delay, total_delay = 0; + + while (1) { + rc = enable_reloc_on_exceptions(); + if (!H_IS_LONG_BUSY(rc)) + return rc; + + delay = get_longbusy_msecs(rc); + total_delay += delay; + if (total_delay > 1000) { + pr_warn("Warning: Giving up waiting to enable " + "relocation on exceptions (%u msec)!\n", + total_delay); + return rc; + } + + mdelay(delay); + } +} +EXPORT_SYMBOL(pSeries_enable_reloc_on_exc); + +long pSeries_disable_reloc_on_exc(void) +{ + long rc; + + while (1) { + rc = disable_reloc_on_exceptions(); + if (!H_IS_LONG_BUSY(rc)) + return rc; + mdelay(get_longbusy_msecs(rc)); + } +} +EXPORT_SYMBOL(pSeries_disable_reloc_on_exc); + +#ifdef CONFIG_KEXEC +static void pSeries_machine_kexec(struct kimage *image) +{ + long rc; + + if (firmware_has_feature(FW_FEATURE_SET_MODE) && + (image->type != KEXEC_TYPE_CRASH)) { + rc = pSeries_disable_reloc_on_exc(); + if (rc != H_SUCCESS) + pr_warning("Warning: Failed to disable relocation on " + "exceptions: %ld\n", rc); + } + + default_machine_kexec(image); +} +#endif + static void __init pSeries_setup_arch(void) { panic_timeout = 10; @@ -389,7 +452,7 @@ static void __init pSeries_setup_arch(void) /* Find and initialize PCI host bridges */ init_pci_config_tokens(); find_and_init_phbs(); - pSeries_reconfig_notifier_register(&pci_dn_reconfig_nb); + of_reconfig_notifier_register(&pci_dn_reconfig_nb); pSeries_nvram_init(); @@ -402,6 +465,14 @@ static void __init pSeries_setup_arch(void) ppc_md.enable_pmcs = pseries_lpar_enable_pmcs; else ppc_md.enable_pmcs = power4_enable_pmcs; + + if (firmware_has_feature(FW_FEATURE_SET_MODE)) { + long rc; + if ((rc = pSeries_enable_reloc_on_exc()) != H_SUCCESS) { + pr_warn("Unable to enable relocation on exceptions: " + "%ld\n", rc); + } + } } static int __init pSeries_init_panel(void) @@ -430,6 +501,14 @@ static int pseries_set_xdabr(unsigned long dabr, unsigned long dabrx) return plpar_hcall_norets(H_SET_XDABR, dabr, dabrx); } +static int pseries_set_dawr(unsigned long dawr, unsigned long dawrx) +{ + /* PAPR says we can't set HYP */ + dawrx &= ~DAWRX_HYP; + + return plapr_set_watchpoint0(dawr, dawrx); +} + #define CMO_CHARACTERISTICS_TOKEN 44 #define CMO_MAXLENGTH 1026 @@ -536,6 +615,9 @@ static void __init pSeries_init_early(void) else if (firmware_has_feature(FW_FEATURE_DABR)) ppc_md.set_dabr = pseries_set_dabr; + if (firmware_has_feature(FW_FEATURE_SET_MODE)) + ppc_md.set_dawr = pseries_set_dawr; + pSeries_cmo_feature_init(); iommu_init_early_pSeries(); @@ -659,4 +741,7 @@ define_machine(pseries) { .progress = rtas_progress, .system_reset_exception = pSeries_system_reset_exception, .machine_check_exception = pSeries_machine_check_exception, +#ifdef CONFIG_KEXEC + .machine_kexec = pSeries_machine_kexec, +#endif }; |