From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E5ABBCCF2F6 for ; Mon, 19 Jan 2026 12:48:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=yNMML/VuNh25QmGXHqI9c5GU4AilrbOqSpr0b0Ncf9I=; b=uCUopAp2pO50ePzLeOi0SzcEvc EZno4zfZtN1fFG+E+SyUg0o67NsGA5xkVnwSTvq5rIU4Di8RbbKJFEg3iPr2cZGU1kF4rzXbOgrUV G9H8cJpWOdDOYH2750DMQrWxyDRp9c2f9s7aIqSBw5/6SOCedXJ4Hyn9XmHNf/1DTuagQGcEOO3bM aNOMZstJfwy8pgAnPey3gKrCw7lTfoViG2WlqqHTeasCzXItErwc+BwRk1egjt5nOwrRYZOtSKHMK 3/afpzO8X4xcFWdW44ubq3NTDKnjSbpImgIMlBKJvdATNTcibMr8dJarKkIwwKaLwEDXryF9/Qc4i stiCKcaw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhogP-000000024DC-2tRF; Mon, 19 Jan 2026 12:48:37 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhoft-000000023lE-1Brd for linux-arm-kernel@bombadil.infradead.org; Mon, 19 Jan 2026 12:48:06 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=yNMML/VuNh25QmGXHqI9c5GU4AilrbOqSpr0b0Ncf9I=; b=LPvgBuj1MM6NyxPgO/1DTaErrE XRhH5Ee6FT5mPDwrxaQCeTEcLNGYTId+nkGfYWY79T32n5bikC1+wdvZqLUeq58WfaXlw5L4Hp44w qGc66/PpiVIpaAkTYr38Z4TvmXjpNSjIgrna7zZUvr56mNVonRMnXfg5qHxSUD2MEJR+32CqWYyfi IH0Us0bMEoTGpRlBnVBnrwnOHh1pu4AirWClk7Zz23nuSL0/2y8tiH/V36e/cKonsBxl/tP7MALNh tZqXykX6ehFtyJ+hKfifhr2kkIMlQsIKlTVd3XDfhe2DEU13Kdxhemd8q3cPU4e7mmWNO1GGqZ/Ol GXtIc+Bw==; Received: from sea.source.kernel.org ([172.234.252.31]) by desiato.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vhofq-0000000C6Us-1VwC for linux-arm-kernel@lists.infradead.org; Mon, 19 Jan 2026 12:48:04 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sea.source.kernel.org (Postfix) with ESMTP id 1A02F406D3; Mon, 19 Jan 2026 12:48:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6BACBC19423; Mon, 19 Jan 2026 12:47:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768826881; bh=rCOXphOI3XK5NnEllmo3VoHDVO0FW1vpq5O+0ieRUpw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=j+WpvLTFQhrGPx0xi1BvJMivvp00zo/X4d1UCM9uPt4jAwVgDlqhyLUmiejG4PLyL VrxI8K94/3rV3bBzoK59aC9F0qnGzK09jOkE1mtcutqIiMynnESfRGf05GLA1DLXvm WtmYOyRWAAyIkGJ5kM24yERZy9MZrDnwDwu1kpt4tVTGnCtj6XRi18HW9wyH6taZu8 2MjF5YOJmXQecsvzpbDhxnlQW+Pw6SH6VOPfrb7wPpMZc2RhV6or+aNDY//j5eomAp GbIUvvaLyuwBZe20yjZviluvzhhN5RVcvclzXgUG262URiayk+4JhZxMtNYFgYq5fk 5f1bTbnmWyNTg== From: Will Deacon To: kvmarm@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org, Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Quentin Perret , Fuad Tabba , Vincent Donnefort , Mostafa Saleh Subject: [PATCH v2 22/35] KVM: arm64: Change 'pkvm_handle_t' to u16 Date: Mon, 19 Jan 2026 12:46:15 +0000 Message-ID: <20260119124629.2563-23-will@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260119124629.2563-1-will@kernel.org> References: <20260119124629.2563-1-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260119_124802_605152_C16C7F1C X-CRM114-Status: GOOD ( 13.62 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 'pkvm_handle_t' doesn't need to be a 32-bit type and subsequent patches will rely on it being no more than 16 bits so that it can be encoded into a pte annotation. Change 'pkvm_handle_t' to a u16 and add a compile-type check that the maximum handle fits into the reduced type. Signed-off-by: Will Deacon --- arch/arm64/include/asm/kvm_host.h | 2 +- arch/arm64/kvm/hyp/nvhe/pkvm.c | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 3191d10a2622..60a5c87b0a17 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -247,7 +247,7 @@ struct kvm_smccc_features { unsigned long vendor_hyp_bmap_2; /* Function numbers 64-127 */ }; -typedef unsigned int pkvm_handle_t; +typedef u16 pkvm_handle_t; struct kvm_protected_vm { pkvm_handle_t handle; diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index 9f0997150cf5..c5772417372d 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -223,6 +223,7 @@ static struct pkvm_hyp_vm **vm_table; void pkvm_hyp_vm_table_init(void *tbl) { + BUILD_BUG_ON((u64)HANDLE_OFFSET + KVM_MAX_PVMS > (pkvm_handle_t)-1); WARN_ON(vm_table); vm_table = tbl; } -- 2.52.0.457.g6b5491de43-goog