From: Amit Daniel Kachhap <amit.kachhap@arm.com>
To: Kristina Martsenko <kristina.martsenko@arm.com>,
linux-arm-kernel@lists.infradead.org
Cc: Mark Rutland <mark.rutland@arm.com>,
Andrew Jones <drjones@redhat.com>,
Julien Thierry <julien.thierry@arm.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will.deacon@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
kvmarm@lists.cs.columbia.edu, James Morse <james.morse@arm.com>,
Ramana Radhakrishnan <ramana.radhakrishnan@arm.com>,
Dave Martin <Dave.Martin@arm.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 8/10] KVM: arm64: Add capability to advertise ptrauth for guest
Date: Tue, 26 Mar 2019 09:42:01 +0530 [thread overview]
Message-ID: <b46cd65c-6e4f-c946-cfb4-df95a718c48f@arm.com> (raw)
In-Reply-To: <1ea6ab95-a52e-3f14-a514-b0b747b85f3a@arm.com>
Hi,
On 3/26/19 1:35 AM, Kristina Martsenko wrote:
> On 19/03/2019 08:30, Amit Daniel Kachhap wrote:
>> This patch advertises the capability of pointer authentication
>> when system supports pointer authentication and VHE mode present.
>>
>> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@arm.com>
>> Cc: Mark Rutland <mark.rutland@arm.com>
>> Cc: Marc Zyngier <marc.zyngier@arm.com>
>> Cc: Christoffer Dall <christoffer.dall@arm.com>
>> Cc: kvmarm@lists.cs.columbia.edu
>> ---
>> arch/arm64/kvm/reset.c | 4 ++++
>> include/uapi/linux/kvm.h | 1 +
>> 2 files changed, 5 insertions(+)
>>
>> diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
>> index 00f0639..a3b269e 100644
>> --- a/arch/arm64/kvm/reset.c
>> +++ b/arch/arm64/kvm/reset.c
>> @@ -92,6 +92,10 @@ int kvm_arch_vm_ioctl_check_extension(struct kvm *kvm, long ext)
>> case KVM_CAP_ARM_VM_IPA_SIZE:
>> r = kvm_ipa_limit;
>> break;
>> + case KVM_CAP_ARM_PTRAUTH:
>> + r = has_vhe() && system_supports_address_auth() &&
>> + system_supports_generic_auth();
>> + break;
>> default:
>> r = 0;
>> }
>> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
>> index 6d4ea4b..a553477 100644
>> --- a/include/uapi/linux/kvm.h
>> +++ b/include/uapi/linux/kvm.h
>> @@ -988,6 +988,7 @@ struct kvm_ppc_resize_hpt {
>> #define KVM_CAP_ARM_VM_IPA_SIZE 165
>> #define KVM_CAP_MANUAL_DIRTY_LOG_PROTECT 166
>> #define KVM_CAP_HYPERV_CPUID 167
>> +#define KVM_CAP_ARM_PTRAUTH 168
>
> Since we now have two separate vcpu flags, then I think we also need two
> capabilities here (one for address auth and one for generic auth). This
> will allow us to support the features separately in the future if we
> need to.
I have no objection to your suggestion. Infact all other KVM_ARM_VCPU_*
features have there own capability defined. I will check other
architectures if they define separate capability for major/minor features.
Thanks,
Amit D
>
> Thanks,
> Kristina
>
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next prev parent reply other threads:[~2019-03-26 4:12 UTC|newest]
Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-19 8:30 [PATCH v7 0/10] Add ARMv8.3 pointer authentication for kvm guest Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 1/10] KVM: arm64: Propagate vcpu into read_id_reg() Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 2/10] KVM: arm64: Support runtime sysreg visibility filtering Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 3/10] KVM: arm64: Move hyp_symbol_addr to fix dependency Amit Daniel Kachhap
2019-03-20 8:49 ` Julien Thierry
2019-03-21 5:29 ` Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 4/10] KVM: arm/arm64: preserve host HCR_EL2 value Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 5/10] KVM: arm/arm64: preserve host MDCR_EL2 value Amit Daniel Kachhap
2019-03-25 20:04 ` Kristina Martsenko
2019-03-26 3:55 ` Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 6/10] KVM: arm64: Add vcpu feature flags to control ptrauth accessibility Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 7/10] KVM: arm/arm64: context-switch ptrauth registers Amit Daniel Kachhap
2019-03-20 12:13 ` Julien Thierry
2019-03-21 6:08 ` Amit Daniel Kachhap
2019-03-21 8:29 ` Julien Thierry
2019-03-25 20:04 ` Kristina Martsenko
2019-03-26 4:03 ` Amit Daniel Kachhap
2019-03-26 18:01 ` Kristina Martsenko
2019-03-27 3:21 ` Amit Daniel Kachhap
2019-03-27 18:16 ` James Morse
2019-03-28 11:29 ` Amit Daniel Kachhap
2019-03-28 18:51 ` James Morse
2019-03-29 5:54 ` Amit Daniel Kachhap
2019-03-19 8:30 ` [PATCH v7 8/10] KVM: arm64: Add capability to advertise ptrauth for guest Amit Daniel Kachhap
2019-03-25 20:05 ` Kristina Martsenko
2019-03-26 4:12 ` Amit Daniel Kachhap [this message]
2019-03-19 8:30 ` [PATCH v7 9/10] KVM: arm64: docs: document KVM support of pointer authentication Amit Daniel Kachhap
2019-03-20 13:37 ` Julien Thierry
2019-03-20 15:04 ` Kristina Martsenko
2019-03-20 18:06 ` Julien Thierry
2019-03-20 20:56 ` Kristina Martsenko
2019-03-21 6:41 ` Amit Daniel Kachhap
2019-03-25 20:05 ` Kristina Martsenko
2019-03-27 10:44 ` Dave Martin
2019-03-27 11:49 ` Amit Daniel Kachhap
2019-03-27 13:50 ` Dave Martin
2019-03-28 10:13 ` Amit Daniel Kachhap
2019-03-19 8:30 ` [kvmtool PATCH v7 10/10] KVM: arm/arm64: Add a vcpu feature for " Amit Daniel Kachhap
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