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powerpc fixes for 5.9 #2 

One fix for a boot crash on some platforms introduced by the recent pkey
 refactoring.
 
 Thanks to:
   Christian Zigotzky, Aneesh Kumar K.V.
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Merge tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "One fix for a boot crash on some platforms introduced by the recent
  pkey refactoring.

  Thanks to Christian Zigotzky and Aneesh Kumar K.V"

* tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)
This commit is contained in:
Linus Torvalds 2020-08-14 13:40:27 -07:00
parent 0520058d05 6553fb799f
commit 7fca4dee61
2 changed files with 8 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
arch/powerpc/mm/book3s64/hash_utils.c
View File

@ -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 */

12
arch/powerpc/mm/book3s64/pkeys.c
View File

@ -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)