From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (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 EE5F96A009 for ; Mon, 4 Nov 2024 13:32:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730727152; cv=none; b=pNnwJVcIRjdbUv8LCkKcjblObV34QdSVTy0vjCyOL3G+NjxR/V30xBuAR3RWIBPcHmx/i1eSrhcLuJMwX4dNwiT4p4dvM2Yp1yzBqxheLlyujNbLYMlqYgDgxowwQB5TfwIcENlnHtPMfQ0Gjd3uEYjvBGOvcRGbxC6QzpKI3ys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730727152; c=relaxed/simple; bh=2zzcr8dahGRVDNl3wZ1YqXvn1JcqJa8MzblIuk2DUSc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Ov+7kaLqwoakzQqmMwokulG0rAsQnDgLjvCU7VvcjH68m1j50QiuIyRSVjZVTH8XZxZBoZuLAjs0xhV2lHJ0TSh8dZqx4i+qBYJxfln4X8GBSW0J52yTF2A4VWf+Ge+O7X0HbeNGa/JAcohUzXKGlyg1VdgVQnxPpo4Zeeqvk6w= 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=ALlbgIaH; arc=none smtp.client-ip=209.85.128.202 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="ALlbgIaH" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6e32b43e053so61927077b3.1 for ; Mon, 04 Nov 2024 05:32:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1730727150; x=1731331950; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=PBItirLg5Oir0h+eEpcfLT0BceEfQcKCnavoc0LgXGQ=; b=ALlbgIaHYl7oLhlM6pmELoctJBApYeAXyfrcR+ayItarxmKKYY0xwiqhIIfOStPnkJ r1Auw/Xtae/XpR5rfuAJr0izpQZTqKuXn9ONgUdLKTMmTvZUReXAZMFqKQNZicODHde8 uzpjEf9KhkFrmEpbN41VFtHHxc9eCu0CltCjwlzznqUmAin2DIkFkAQ7LDc/s2g7aYNy ig8wBizKoCl2MNHMnchm13W4NYF7K1EUDuMHAzzjaBOfO1DyraLcw5XehB+D0m6BnRTI URtSpNufwJhFC4W+3hVYQAd9JWdAGl8/gZNJjhMUG6UtBtnRJKwyTYKUJC9tJp4jcqN7 vjAw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1730727150; x=1731331950; 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=PBItirLg5Oir0h+eEpcfLT0BceEfQcKCnavoc0LgXGQ=; b=xF2umUlHAqSgcC284iNQ8CMXUVk8FSdnkGnyu1SKHCWO8CvCN0R7JA/0HEf6MNyTnv h3nVM6qkX7kPp/Tml3uWyj2lWgGeGUQsQEmad4d71q28WZET8THw+aaHA9GRbC43OCsY SVZDrtHB6xAMFEZAarexhgcv/JdhfQj20OjPzAMt8hGFL5IyaxMd8RF7liXXDz2IPv9p sbPw+KO2ttxnxq/Ui/uWBB0hUJ68QJvLymXeybQAHj0Znu15inTGDQTh5cNRRlsffUae GAzI4N8mI3Xz6x9GOG2UAG3JeXUVXCVjgklhYCEccfIpz/NKa951DU1LiRaK6HBTwwKw kIkA== X-Forwarded-Encrypted: i=1; AJvYcCXwYxh2UPVJq5WvyxfDSPRQ7+aKSjbdz7idc0rWqcIVmF/EmTVBBjbsmquQrDELBCUf2fv87CQ=@lists.linux.dev X-Gm-Message-State: AOJu0YzAEyIbhm1bb984PajmGMwISRgIedVx8RMLlb1b8L+qlITfyGV3 3yOtBro8mZzGgOaA+t66TAqdr7ij926Ce/HRcSlryal4H4P7ovDtuIFSr2NIUMsChpL4txaLv2b yl1QlTg== X-Google-Smtp-Source: AGHT+IFvrgh3CVf1TWze2me+UFlYP3CJE1J8M2LCwjOfq5XmD1MuK3gwOqhUj0cOzAZs1ZrUlVldZRwY5pmA X-Received: from big-boi.c.googlers.com ([fda3:e722:ac3:cc00:31:98fb:c0a8:129]) (user=qperret job=sendgmr) by 2002:a25:2bc9:0:b0:e27:3e6a:345 with SMTP id 3f1490d57ef6-e33026dcafemr8506276.10.1730727149901; Mon, 04 Nov 2024 05:32:29 -0800 (PST) Date: Mon, 4 Nov 2024 13:31:55 +0000 In-Reply-To: <20241104133204.85208-1-qperret@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241104133204.85208-1-qperret@google.com> X-Mailer: git-send-email 2.47.0.163.g1226f6d8fa-goog Message-ID: <20241104133204.85208-10-qperret@google.com> Subject: [PATCH 09/18] KVM: arm64: Introduce {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 gettemporary 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 6940eb171a52..be52c5b15e21 100644 --- a/arch/arm64/kvm/hyp/include/nvhe/pkvm.h +++ b/arch/arm64/kvm/hyp/include/nvhe/pkvm.h @@ -77,4 +77,7 @@ struct pkvm_hyp_vcpu *pkvm_load_hyp_vcpu(pkvm_handle_t handle, void pkvm_put_hyp_vcpu(struct pkvm_hyp_vcpu *hyp_vcpu); struct pkvm_hyp_vcpu *pkvm_get_loaded_hyp_vcpu(void); +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 9ed2b8a63371..d242da1ec56a 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -317,6 +317,26 @@ struct pkvm_hyp_vcpu *pkvm_get_loaded_hyp_vcpu(void) return __this_cpu_read(loaded_hyp_vcpu); } +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 unpin_host_vcpu(struct kvm_vcpu *host_vcpu) { if (host_vcpu) -- 2.47.0.163.g1226f6d8fa-goog