From: Dave Martin <Dave.Martin@arm.com>
To: kvmarm@lists.cs.columbia.edu
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Okamoto Takayuki" <tokamoto@jp.fujitsu.com>,
"Christoffer Dall" <cdall@kernel.org>,
"Ard Biesheuvel" <ard.biesheuvel@linaro.org>,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Will Deacon" <will.deacon@arm.com>,
"Zhang Lei" <zhang.lei@jp.fujitsu.com>,
"Julien Grall" <julien.grall@arm.com>,
"Alex Bennée" <alex.bennee@linaro.org>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH v6 25/27] KVM: arm64: Add a capability to advertise SVE support
Date: Tue, 19 Mar 2019 17:52:16 +0000 [thread overview]
Message-ID: <1553017938-710-26-git-send-email-Dave.Martin@arm.com> (raw)
In-Reply-To: <1553017938-710-1-git-send-email-Dave.Martin@arm.com>
To provide a uniform way to check for KVM SVE support amongst other
features, this patch adds a suitable capability KVM_CAP_ARM_SVE,
and reports it as present when SVE is available.
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
Changes since v5:
* [Julien Thierry] Strip out has_vhe() sanity-check, which wasn't in
the most logical place, and anyway doesn't really belong in this
patch.
Moved to KVM: arm64/sve: Allow userspace to enable SVE for vcpus
instead.
---
arch/arm64/kvm/reset.c | 3 +++
include/uapi/linux/kvm.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 4f04dbf..180d7a5 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -98,6 +98,9 @@ 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_SVE:
+ r = system_supports_sve();
+ break;
default:
r = 0;
}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index c3b8e7a..1d56444 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_SVE 168
#ifdef KVM_CAP_IRQ_ROUTING
--
2.1.4
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next prev parent reply other threads:[~2019-03-19 17:58 UTC|newest]
Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-19 17:51 [PATCH v5 00/26] KVM: arm64: SVE guest support Dave Martin
2019-03-19 17:51 ` [PATCH v6 01/27] KVM: Documentation: Document arm64 core registers in detail Dave Martin
2019-03-19 17:51 ` [PATCH v6 02/27] arm64: fpsimd: Always set TIF_FOREIGN_FPSTATE on task state flush Dave Martin
2019-03-19 17:51 ` [PATCH v6 03/27] KVM: arm64: Delete orphaned declaration for __fpsimd_enabled() Dave Martin
2019-03-19 17:51 ` [PATCH v6 04/27] KVM: arm64: Refactor kvm_arm_num_regs() for easier maintenance Dave Martin
2019-03-19 17:51 ` [PATCH v6 05/27] KVM: arm64: Add missing #includes to kvm_host.h Dave Martin
2019-03-19 17:51 ` [PATCH v6 06/27] arm64/sve: Clarify role of the VQ map maintenance functions Dave Martin
2019-03-19 17:51 ` [PATCH v6 07/27] arm64/sve: Check SVE virtualisability Dave Martin
2019-03-19 17:51 ` [PATCH v6 08/27] arm64/sve: Enable SVE state tracking for non-task contexts Dave Martin
2019-03-19 17:52 ` [PATCH v6 09/27] KVM: arm64: Add a vcpu flag to control SVE visibility for the guest Dave Martin
2019-03-19 17:52 ` [PATCH v6 10/27] KVM: arm64: Propagate vcpu into read_id_reg() Dave Martin
2019-03-19 17:52 ` [PATCH v6 11/27] KVM: arm64: Support runtime sysreg visibility filtering Dave Martin
2019-04-02 2:49 ` Amit Daniel Kachhap
2019-03-19 17:52 ` [PATCH v6 12/27] KVM: arm64/sve: System register context switch and access support Dave Martin
2019-03-26 13:58 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 13/27] KVM: arm64/sve: Context switch the SVE registers Dave Martin
2019-03-27 8:15 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 14/27] KVM: Allow 2048-bit register access via ioctl interface Dave Martin
2019-03-19 17:52 ` [PATCH v6 15/27] KVM: arm64: Add missing #include of <linux/string.h> in guest.c Dave Martin
2019-03-19 17:52 ` [PATCH v6 16/27] KVM: arm64: Factor out core register ID enumeration Dave Martin
2019-03-27 8:46 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 17/27] KVM: arm64: Reject ioctl access to FPSIMD V-regs on SVE vcpus Dave Martin
2019-03-27 8:46 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 18/27] KVM: arm64/sve: Add SVE support to register access ioctl interface Dave Martin
2019-03-27 9:23 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 19/27] KVM: arm64: Enumerate SVE register indices for KVM_GET_REG_LIST Dave Martin
2019-03-27 9:47 ` Julien Thierry
2019-03-27 10:33 ` Dave Martin
2019-03-27 15:21 ` Julien Thierry
2019-03-28 12:27 ` Dave Martin
2019-03-28 14:29 ` Julien Thierry
2019-03-28 16:48 ` Dave Martin
2019-03-28 16:59 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 20/27] arm64/sve: In-kernel vector length availability query interface Dave Martin
2019-03-19 17:52 ` [PATCH v6 21/27] KVM: arm/arm64: Add hook for arch-specific KVM initialisation Dave Martin
2019-03-27 10:07 ` Julien Thierry
2019-03-27 10:41 ` Dave Martin
2019-03-27 15:23 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 22/27] KVM: arm/arm64: Add KVM_ARM_VCPU_FINALIZE ioctl Dave Martin
2019-03-27 14:07 ` Julien Thierry
2019-03-27 17:42 ` Dave Martin
2019-03-19 17:52 ` [PATCH v6 23/27] KVM: arm64/sve: Add pseudo-register for the guest's vector lengths Dave Martin
2019-03-27 14:57 ` Julien Thierry
2019-03-19 17:52 ` [PATCH v6 24/27] KVM: arm64/sve: Allow userspace to enable SVE for vcpus Dave Martin
2019-03-27 15:15 ` Julien Thierry
2019-03-19 17:52 ` Dave Martin [this message]
2019-03-27 15:16 ` [PATCH v6 25/27] KVM: arm64: Add a capability to advertise SVE support Julien Thierry
2019-03-19 17:52 ` [PATCH v6 26/27] KVM: Document errors for KVM_GET_ONE_REG and KVM_SET_ONE_REG Dave Martin
2019-03-19 17:52 ` [PATCH v6 27/27] KVM: arm64/sve: Document KVM API extensions for SVE Dave Martin
2019-03-19 17:58 ` [PATCH v5 00/26] KVM: arm64: SVE guest support Dave Martin
2019-03-27 5:51 ` Zhang, Lei
2019-03-20 12:30 ` Dave Martin
2019-03-25 16:32 ` Andrew Jones
2019-03-25 16:38 ` Peter Maydell
2019-03-25 16:49 ` Andrew Jones
2019-03-26 11:28 ` Dave Martin
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