diff options
Diffstat (limited to 'arch/x86/events/intel/uncore.c')
| -rw-r--r-- | arch/x86/events/intel/uncore.c | 31 |
1 files changed, 24 insertions, 7 deletions
diff --git a/arch/x86/events/intel/uncore.c b/arch/x86/events/intel/uncore.c index 33c8180d5a87..d1113702e949 100644 --- a/arch/x86/events/intel/uncore.c +++ b/arch/x86/events/intel/uncore.c @@ -4,7 +4,12 @@ #include <asm/cpu_device_id.h> #include <asm/intel-family.h> #include "uncore.h" +#include "uncore_discovery.h" +static bool uncore_no_discover; +module_param(uncore_no_discover, bool, 0); +MODULE_PARM_DESC(uncore_no_discover, "Don't enable the Intel uncore PerfMon discovery mechanism " + "(default: enable the discovery mechanism)."); static struct intel_uncore_type *empty_uncore[] = { NULL, }; struct intel_uncore_type **uncore_msr_uncores = empty_uncore; struct intel_uncore_type **uncore_pci_uncores = empty_uncore; @@ -1637,6 +1642,9 @@ static const struct intel_uncore_init_fun snr_uncore_init __initconst = { .mmio_init = snr_uncore_mmio_init, }; +static const struct intel_uncore_init_fun generic_uncore_init __initconst = { +}; + static const struct x86_cpu_id intel_uncore_match[] __initconst = { X86_MATCH_INTEL_FAM6_MODEL(NEHALEM_EP, &nhm_uncore_init), X86_MATCH_INTEL_FAM6_MODEL(NEHALEM, &nhm_uncore_init), @@ -1684,17 +1692,21 @@ static int __init intel_uncore_init(void) struct intel_uncore_init_fun *uncore_init; int pret = 0, cret = 0, mret = 0, ret; - id = x86_match_cpu(intel_uncore_match); - if (!id) - return -ENODEV; - if (boot_cpu_has(X86_FEATURE_HYPERVISOR)) return -ENODEV; __uncore_max_dies = topology_max_packages() * topology_max_die_per_package(); - uncore_init = (struct intel_uncore_init_fun *)id->driver_data; + id = x86_match_cpu(intel_uncore_match); + if (!id) { + if (!uncore_no_discover && intel_uncore_has_discovery_tables()) + uncore_init = (struct intel_uncore_init_fun *)&generic_uncore_init; + else + return -ENODEV; + } else + uncore_init = (struct intel_uncore_init_fun *)id->driver_data; + if (uncore_init->pci_init) { pret = uncore_init->pci_init(); if (!pret) @@ -1711,8 +1723,10 @@ static int __init intel_uncore_init(void) mret = uncore_mmio_init(); } - if (cret && pret && mret) - return -ENODEV; + if (cret && pret && mret) { + ret = -ENODEV; + goto free_discovery; + } /* Install hotplug callbacks to setup the targets for each package */ ret = cpuhp_setup_state(CPUHP_AP_PERF_X86_UNCORE_ONLINE, @@ -1727,6 +1741,8 @@ err: uncore_types_exit(uncore_msr_uncores); uncore_types_exit(uncore_mmio_uncores); uncore_pci_exit(); +free_discovery: + intel_uncore_clear_discovery_tables(); return ret; } module_init(intel_uncore_init); @@ -1737,5 +1753,6 @@ static void __exit intel_uncore_exit(void) uncore_types_exit(uncore_msr_uncores); uncore_types_exit(uncore_mmio_uncores); uncore_pci_exit(); + intel_uncore_clear_discovery_tables(); } module_exit(intel_uncore_exit); |