From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-lj1-f202.google.com (mail-lj1-f202.google.com [209.85.208.202]) (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 478151E377F for ; Tue, 3 Dec 2024 10:37:56 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733222277; cv=none; b=eHd8KSdGATUd+BZ54fkWTtdp5dCaZNvCKFMH1ln3Mv+ZJ7nQvpMb1/UYDwlQepp6R2gU2WyNgwecNGhaWRdyby9XkgypVSy2+DHFBPUI47s8UMyxW0CObR2FVxibEsYYOvZp/KDyjFRz8rN0qyRCobpSB1tsvtio2UwOGB3U8Sk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1733222277; c=relaxed/simple; bh=IuYyF+ZnGppO8PAFBi7Chs+i2+5hGe6b9QeErqyYhmE=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=ux42e9vbVjs63McGR4w7oHmDNJdPRqxlmTr6Wa6VT9OM0OD6AiYC4vfAjTtk/d7iGW/VL0UNe1pqO2YHBNK8dKB0OUh/Bk9OwZ/7amQtvIkSjdlwYcw/wPFJaB/tA4Y4o1vpeG2VliXD7lXTtqWFbMmgdjzlXVUPie4dw5WUqRs= 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=hirlSGAf; arc=none smtp.client-ip=209.85.208.202 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="hirlSGAf" Received: by mail-lj1-f202.google.com with SMTP id 38308e7fff4ca-30011d2f7a8so2141441fa.3 for ; Tue, 03 Dec 2024 02:37:56 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1733222274; x=1733827074; 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=BRZ2cEpW+rSNUfUs/q11EvB+KMkExBUSGtmow/HBwh4=; b=hirlSGAfimz8UekkydtdkaF2iTnr4EG2k1ebhySMz83MfrbP0XmTMNJNBo+vpxOixK O2+oxiofbWG7FkJlQSVzJPa9a9e4Docb+2iKPoOUpQqMUsIHvSmoAFwfrSu/M0C7sT5T a+yXYxneq2kHrBdrwbB6g0dEzwd8QMK4Fj4mDIhCYR4k4o9t47DvuKoAyYBC7fg3mz7G mR/vAAWfLnvHMEfBlzdRWgPqcUg+kmecMv9EAc+tRcuwqwIM20Yw7hXXtG8ZhMTuucvz 8msKsIDhlyqjo3s8Jj1VT4UThUjENG7tR4UiKfFo6LxZAjG0wAjaveqbyK/VJr13S7jC /QYw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1733222274; x=1733827074; 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=BRZ2cEpW+rSNUfUs/q11EvB+KMkExBUSGtmow/HBwh4=; b=jH8BjMApVxVmQOI7xTQ8+SqrkqT/19OdKfbaJeesSofTeHK+d08n+WhtZ2HHD+rDD5 pgRFN2XzH//VBFO+/ySwDGHFjcK8GRVjYcUpHZ8a7M4yLqjP8sd7I0HYfZPdhWi0vwEq p7BdsnX90Pt2Ife8HKitGW71QbTFVWHAFlzByho0VhYmVulIDv9t5RROb2S813na7/PX FHGODmK5H7iYCW6iwndrqU7FhpCOJOUaEtMnJd+uoYq+ndqv0pkQX3Y7DffbAZlzN4W6 ibCQpigGGnF5yyzm5tdB3Mqwzne4kcmNYHNBWuCpRVltWl8FMWrwf4cB7ZHqGCA2Ia/x vBEw== X-Forwarded-Encrypted: i=1; AJvYcCV+o0s/RIrgegE0LGJ8yGNQ8nx8jHoPrD1RR6dgN9aTpL71Br3fyR3bOOLdbkH8YySPzE6JvgPfsbmkplI=@vger.kernel.org X-Gm-Message-State: AOJu0YxS7h6TpWEct3J9KJdM/vawdq8BiHEp9ITdAFRIeejP7L77OjYa QuxqZd8ltLsxSErvSjy+9q0KgdV2NZeC4tMMlbN6+O7I0SGDT4pvpju0Pa9mwALTQ1rxL1J539q NhChgeQ== X-Google-Smtp-Source: AGHT+IEj8AuZHCZpDYFglBJG72MANHTDv565iypJfWiYGscbgWwh2Qi7NN2thjRyh4mSRHfuIeZ5D8lm4Rqv X-Received: from edxz12.prod.google.com ([2002:aa7:cf8c:0:b0:5cf:ac1b:14fa]) (user=qperret job=prod-delivery.src-stubby-dispatcher) by 2002:a2e:b890:0:b0:2ff:8e69:77ef with SMTP id 38308e7fff4ca-30009c0d863mr13033771fa.1.1733222274568; Tue, 03 Dec 2024 02:37:54 -0800 (PST) Date: Tue, 3 Dec 2024 10:37:25 +0000 In-Reply-To: <20241203103735.2267589-1-qperret@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241203103735.2267589-1-qperret@google.com> X-Mailer: git-send-email 2.47.0.338.g60cca15819-goog Message-ID: <20241203103735.2267589-9-qperret@google.com> Subject: [PATCH v2 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-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 --- 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/include/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 handle, unsigned int vcpu_idx); void pkvm_put_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu); +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 01616c39a810..4db88bedf8d5 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); } +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 = 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 = &hyp_vm->kvm; -- 2.47.0.338.g60cca15819-goog