From nobody Mon Feb 9 20:35:42 2026 Received: from mail-ej1-f73.google.com (mail-ej1-f73.google.com [209.85.218.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E8754207E16 for ; Mon, 16 Dec 2024 17:58:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.218.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734371905; cv=none; b=CByqn7PGzUuBDOZ31W28Y70vkm6PXEEwCkc8nF418ARCUqGTp8wse/jvLiel88p5IiBUlf3oC09CS7ua8ocpu2iESl7z8n/PuF3CmO3o5u0KiID0UXeC64qEW4kekA+aTMJDmdMiP1NrE4phkp1hyMMlM0khofH29SX38A5W2hA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1734371905; c=relaxed/simple; bh=3XHMTTobse3q0dEwknl/B4DvUFVndatcPNdmNVk4PtU=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ikerUxOAAuQNFn60beIVi9mUDKNxPyDESrStG2DMzLGMf9J3Ywv+/YwgsiSmrLaO7re4jwnpC3ZcyUxcqrFC5Scgv1kVDohllcqsEL54ayR1gxhf7kPVy0/Ov53bodGVFeWtlRKYHbW4oZNW1A0br1WOkhQeRs+zcb3g0dZ/58c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=AqOHSezX; arc=none smtp.client-ip=209.85.218.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--qperret.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="AqOHSezX" Received: by mail-ej1-f73.google.com with SMTP id a640c23a62f3a-aa66bc3b46dso337418466b.3 for ; Mon, 16 Dec 2024 09:58:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1734371902; x=1734976702; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=FdcyBmRiYnupt5usNoa8YsTNzt1V3OCJZIqsaCSd/iY=; b=AqOHSezXX+lreDw14OvGmpGfaMzg+7oGK2suDC6PPL6WdzI7d1llGZXu+LIHTMTfgw lZA8vADxHiZrxgVeE2M+GVlVgIFrZkCdFI1or3qo2SnOXsV5lAZeRq6N4s4T0aD5IqlH IEY3dcZdwRUktMzFU/UcpCFiPtPYuxukJTqmByJXGilSHwjHgza1fM8fFKbM+XT6PYki 0wPPK9wJxFFWnO+1t/4RvTyVrCREdxm29qPR+H0gQXw1DuheKV5OntDZXab+8LzeXrIz 3FabWSIIbwKEEb4/4Oq3q/wPajaSdMpLCh3T9ytE+DtWPm4omqrt+kEZlSNHBnR9sDu8 98Fg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1734371902; x=1734976702; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=FdcyBmRiYnupt5usNoa8YsTNzt1V3OCJZIqsaCSd/iY=; b=eci2zGrVtSiLBdFaYeMfae3U8ose9IbTQi9Vks2D7Wo+9Q0Bgw09UKWlxO2/2Z/50s 0w3SuaWqXU9lvhQMyQARb1r3PTSXkakFV4M96lEyu68+jmUISgHtZG3ok8CCGLSuHn3P vbYxEk0HLIP+mb8sFrew4BNs3K0SI62QQXghKb+Zk4DZC4LaV+nIOVY/8N3SY/BWf2SJ dy8XDOYt0TVNqyZmc1JtwyEywLBBNgWOVNhnm8YCAAIZ5slU3XJiXa0a3Q4g8vDoqrMp daFJ3u6lLQOyThZa14AP++0qNanj16f8HfTgeD8+GWew7x+2GXfdMRYaMjZ8/UsXvAF2 omUQ== X-Forwarded-Encrypted: i=1; AJvYcCXfd8sXPHjhrrK2GJReYax1M3ihMdXZ4PmdCA+Am7PoCZOAWYUwLg9ilbPJy127D+fErp1i9kGvi7z7+1Y=@vger.kernel.org X-Gm-Message-State: AOJu0Yx7P+4MNb1LmlOhfV8EhjMRZvRk8vax2vy2TJQrIayfhp1qJEli a9WumSTKQAZkYl8DsCiTDZKIXxPeSc+VVnCT8G/kvlqqE68IDfy/O0W0Bf7mz7w/SDthKqypLrk Siz5Grw== X-Google-Smtp-Source: AGHT+IHpcpJq4kyenHoOx1fxav7mIvFDvXklCXubp7lwpwsMau839iNr+DB/Q2jwccyvsQCELDrIix68lHxb X-Received: from edbfj7.prod.google.com ([2002:a05:6402:2b87:b0:5d3:e71d:9abe]) (user=qperret job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6402:254e:b0:5d2:7270:6128 with SMTP id 4fb4d7f45d1cf-5d63c3dbe25mr31398284a12.25.1734371902351; Mon, 16 Dec 2024 09:58:22 -0800 (PST) Date: Mon, 16 Dec 2024 17:57:53 +0000 In-Reply-To: <20241216175803.2716565-1-qperret@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241216175803.2716565-1-qperret@google.com> X-Mailer: git-send-email 2.47.1.613.gc27f4b7a9f-goog Message-ID: <20241216175803.2716565-9-qperret@google.com> Subject: [PATCH v3 08/18] KVM: arm64: Add {get,put}_pkvm_hyp_vm() helpers From: Quentin Perret To: Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Will Deacon Cc: Fuad Tabba , Vincent Donnefort , Sebastian Ene , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In preparation for accessing pkvm_hyp_vm structures at EL2 in a context where we can't always expect a vCPU to be loaded (e.g. MMU notifiers), introduce get/put helpers to get temporary references to hyp VMs from any context. Signed-off-by: Quentin Perret Reviewed-by: Fuad Tabba --- arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 3 +++ arch/arm64/kvm/hyp/nvhe/pkvm.c | 20 ++++++++++++++++++++ 2 files changed, 23 insertions(+) diff --git a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h b/arch/arm64/kvm/hyp/in= clude/nvhe/pkvm.h index 24a9a8330d19..f361d8b91930 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h +++ b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h @@ -70,4 +70,7 @@ struct pkvm_hyp_vcpu *pkvm_load_hyp_vcpu(pkvm_handle_t ha= ndle, unsigned int vcpu_idx); void pkvm_put_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu); =20 +struct pkvm_hyp_vm *get_pkvm_hyp_vm(pkvm_handle_t handle); +void put_pkvm_hyp_vm(struct pkvm_hyp_vm *hyp_vm); + #endif /* __ARM64_KVM_NVHE_PKVM_H__ */ diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index 071993c16de8..d46a02e24e4a 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -327,6 +327,26 @@ void pkvm_put_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu) hyp_spin_unlock(&vm_table_lock); } =20 +struct pkvm_hyp_vm *get_pkvm_hyp_vm(pkvm_handle_t handle) +{ + struct pkvm_hyp_vm *hyp_vm; + + hyp_spin_lock(&vm_table_lock); + hyp_vm =3D get_vm_by_handle(handle); + if (hyp_vm) + hyp_page_ref_inc(hyp_virt_to_page(hyp_vm)); + hyp_spin_unlock(&vm_table_lock); + + return hyp_vm; +} + +void put_pkvm_hyp_vm(struct pkvm_hyp_vm *hyp_vm) +{ + hyp_spin_lock(&vm_table_lock); + hyp_page_ref_dec(hyp_virt_to_page(hyp_vm)); + hyp_spin_unlock(&vm_table_lock); +} + static void pkvm_init_features_from_host(struct pkvm_hyp_vm *hyp_vm, const= struct kvm *host_kvm) { struct kvm *kvm =3D &hyp_vm->kvm; --=20 2.47.1.613.gc27f4b7a9f-goog