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Diffstat (limited to 'arch/powerpc/kernel/prom.c')
-rw-r--r--arch/powerpc/kernel/prom.c29
1 files changed, 20 insertions, 9 deletions
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index d2f0afeae5a0..40c4887c27b6 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -57,6 +57,7 @@
#include <asm/fadump.h>
#include <asm/epapr_hcalls.h>
#include <asm/firmware.h>
+#include <asm/dt_cpu_ftrs.h>
#include <mm/mmu_decl.h>
@@ -375,23 +376,31 @@ static int __init early_init_dt_scan_cpus(unsigned long node,
* A POWER6 partition in "POWER6 architected" mode
* uses the 0x0f000002 PVR value; in POWER5+ mode
* it uses 0x0f000001.
+ *
+ * If we're using device tree CPU feature discovery then we don't
+ * support the cpu-version property, and it's the responsibility of the
+ * firmware/hypervisor to provide the correct feature set for the
+ * architecture level via the ibm,powerpc-cpu-features binding.
*/
- prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
- if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000)
- identify_cpu(0, be32_to_cpup(prop));
+ if (!dt_cpu_ftrs_in_use()) {
+ prop = of_get_flat_dt_prop(node, "cpu-version", NULL);
+ if (prop && (be32_to_cpup(prop) & 0xff000000) == 0x0f000000)
+ identify_cpu(0, be32_to_cpup(prop));
- identical_pvr_fixup(node);
+ check_cpu_feature_properties(node);
+ check_cpu_pa_features(node);
+ }
- check_cpu_feature_properties(node);
- check_cpu_pa_features(node);
+ identical_pvr_fixup(node);
init_mmu_slb_size(node);
#ifdef CONFIG_PPC64
- if (nthreads > 1)
- cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
- else
+ if (nthreads == 1)
cur_cpu_spec->cpu_features &= ~CPU_FTR_SMT;
+ else if (!dt_cpu_ftrs_in_use())
+ cur_cpu_spec->cpu_features |= CPU_FTR_SMT;
#endif
+
return 0;
}
@@ -721,6 +730,8 @@ void __init early_init_devtree(void *params)
DBG("Scanning CPUs ...\n");
+ dt_cpu_ftrs_scan();
+
/* Retrieve CPU related informations from the flat tree
* (altivec support, boot CPU ID, ...)
*/