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| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2020-05-13 12:03:34 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-05-20 20:40:13 +0300 |
| commit | f73531f0257f6bac44a8c9d5c2f3a3ccaea3d1e9 (patch) | |
| tree | cde6d2dc288cf9a07106718615fcf1b6a8d899f6 /arch/arm64/kernel | |
| parent | c73433fc630cda102f6527d4e5dfd289a9baec08 (diff) | |
| download | linux-f73531f0257f6bac44a8c9d5c2f3a3ccaea3d1e9.tar.xz | |
arm64/cpufeature: Drop open encodings while extracting parange
Currently there are multiple instances of parange feature width mask open
encodings while fetching it's value. Even the width mask value (0x7) itself
is not accurate. It should be (0xf) per ID_AA64MMFR0_EL1.PARange[3:0] as in
ARM ARM (0487F.a). Replace them with cpuid_feature_extract_unsigned_field()
which can extract given standard feature (4 bits width i.e 0xf mask) field.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: James Morse <james.morse@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/1589360614-1164-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel')
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index be8a634abdd4..1c5bfe48d381 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2337,7 +2337,8 @@ static void verify_hyp_capabilities(void) } /* Verify IPA range */ - parange = mmfr0 & 0x7; + parange = cpuid_feature_extract_unsigned_field(mmfr0, + ID_AA64MMFR0_PARANGE_SHIFT); ipa_max = id_aa64mmfr0_parange_to_phys_shift(parange); if (ipa_max < get_kvm_ipa_limit()) { pr_crit("CPU%d: IPA range mismatch\n", smp_processor_id()); |