Commit 6553fb79 authored by Aneesh Kumar K.V's avatar Aneesh Kumar K.V Committed by Michael Ellerman

powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)

On p6 and before we should avoid updating UAMOR SPRN. This resulted
in boot failure on Nemo board.

Fixes: 269e829f ("powerpc/book3s64/pkey: Disable pkey on POWER6 and before")
Reported-by: default avatarChristian Zigotzky <chzigotzky@xenosoft.de>
Signed-off-by: default avatarAneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200810102623.685083-1-aneesh.kumar@linux.ibm.com
parent 7b9de977
......@@ -1115,9 +1115,8 @@ void hash__early_init_mmu_secondary(void)
&& cpu_has_feature(CPU_FTR_HVMODE))
tlbiel_all();
#ifdef CONFIG_PPC_MEM_KEYS
mtspr(SPRN_UAMOR, default_uamor);
#endif
if (IS_ENABLED(CONFIG_PPC_MEM_KEYS) && mmu_has_feature(MMU_FTR_PKEY))
mtspr(SPRN_UAMOR, default_uamor);
}
#endif /* CONFIG_SMP */
......
......@@ -73,12 +73,6 @@ static int scan_pkey_feature(void)
if (early_radix_enabled())
return 0;
/*
* Only P7 and above supports SPRN_AMR update with MSR[PR] = 1
*/
if (!early_cpu_has_feature(CPU_FTR_ARCH_206))
return 0;
ret = of_scan_flat_dt(dt_scan_storage_keys, &pkeys_total);
if (ret == 0) {
/*
......@@ -124,6 +118,12 @@ void __init pkey_early_init_devtree(void)
__builtin_popcountl(ARCH_VM_PKEY_FLAGS >> VM_PKEY_SHIFT)
!= (sizeof(u64) * BITS_PER_BYTE));
/*
* Only P7 and above supports SPRN_AMR update with MSR[PR] = 1
*/
if (!early_cpu_has_feature(CPU_FTR_ARCH_206))
return;
/* scan the device tree for pkey feature */
pkeys_total = scan_pkey_feature();
if (!pkeys_total)
......
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