diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2020-05-19 12:40:42 +0300 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-05-21 17:47:11 +0300 |
| commit | dd35ec07045753adcc86f89d485e589d860e298f (patch) | |
| tree | 05404e21fac8de6fb1c8cc8db86c9265c814829d /arch/arm64/kvm | |
| parent | 16824085a7dd426408d4403284374da90671e749 (diff) | |
| download | linux-dd35ec07045753adcc86f89d485e589d860e298f.tar.xz | |
arm64/cpufeature: Introduce ID_DFR1 CPU register
This adds basic building blocks required for ID_DFR1 CPU register which
provides top level information about the debug system in AArch32 state.
We hide the register from KVM guests, as we don't emulate the 'MTPMU'
feature.
This is added per ARM DDI 0487F.a specification.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Suggested-by: Will Deacon <will@kernel.org>
Reviewed-by : Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Link: https://lore.kernel.org/r/1589881254-10082-6-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kvm')
| -rw-r--r-- | arch/arm64/kvm/sys_regs.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index b784b156edb3..0723cfbff7e9 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1457,7 +1457,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_SANITISED(MVFR2_EL1), ID_UNALLOCATED(3,3), ID_SANITISED(ID_PFR2_EL1), - ID_UNALLOCATED(3,5), + ID_HIDDEN(ID_DFR1_EL1), ID_UNALLOCATED(3,6), ID_UNALLOCATED(3,7), |