diff options
| author | Anshuman Khandual <anshuman.khandual@arm.com> | 2020-05-12 07:27:27 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-05-20 15:59:23 +0100 |
| commit | c73433fc630cda102f6527d4e5dfd289a9baec08 (patch) | |
| tree | 74f7dec4356f79cdea99be5dfde31134e8bf6497 /arch/arm64/kvm/reset.c | |
| parent | eeb2d87ece1219cff33e5107c2a6d57803354d15 (diff) | |
arm64/cpufeature: Validate hypervisor capabilities during CPU hotplug
This validates hypervisor capabilities like VMID width, IPA range for any
hot plug CPU against system finalized values. KVM's view of the IPA space
is used while allowing a given CPU to come up. While here, it factors out
get_vmid_bits() for general use.
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: linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-kernel@vger.kernel.org
Suggested-by: Suzuki Poulose <suzuki.poulose@arm.com>
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/1589248647-22925-1-git-send-email-anshuman.khandual@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kvm/reset.c')
| -rw-r--r-- | arch/arm64/kvm/reset.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 102e5c4e01a0..d4eb6612bb3c 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -332,6 +332,11 @@ out: return ret; } +u32 get_kvm_ipa_limit(void) +{ + return kvm_ipa_limit; +} + void kvm_set_ipa_limit(void) { unsigned int ipa_max, pa_max, va_max, parange; |