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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD10AC433FE for ; Tue, 19 Oct 2021 12:13:14 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 42D426137D for ; Tue, 19 Oct 2021 12:13:14 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 42D426137D Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=google.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id D32364B160; Tue, 19 Oct 2021 08:13:13 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@google.com Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VpPDbsJvawvc; Tue, 19 Oct 2021 08:13:12 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id BD6D04B165; Tue, 19 Oct 2021 08:13:12 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id B19D44B116 for ; Tue, 19 Oct 2021 08:13:11 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id jqS64fqJNzYf for ; Tue, 19 Oct 2021 08:13:10 -0400 (EDT) Received: from mail-wr1-f74.google.com (mail-wr1-f74.google.com [209.85.221.74]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id E89EE4B0CE for ; Tue, 19 Oct 2021 08:13:09 -0400 (EDT) Received: by mail-wr1-f74.google.com with SMTP id 10-20020a5d47aa000000b001610cbda93dso10036569wrb.23 for ; Tue, 19 Oct 2021 05:13:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=tdsCErEUABqyyQ1mbx3uMSi/aufrxWWc3XxvUpZyi6c=; b=agqompm2B2MZmrGmB/gxpWpG6vgaVYlKU4CIg03TGpGC+4aalw5NfoiD3nd16AtPKC +DDl3VZfg72c4W3xGXNnVhohTo/s1mh5Cyu5/QSadO0RvwtMUqZBiqtMAx328Fh9wqjq O0Nnn+TUupK1jSkoQ6zAv3/qn9uizgYDbldXMVCRDlXhC3lCi4AOj3ogrxk1mN+ucv3t cBTjLmdxquTpk/VsYC9VrDb0/yJLDYC7h9Lyd93revkEa0NK2jXBGNPbXzqtFp+2iCfn x3H7XuI7FYVAgUe1wh0Gh6d7Wleobtrh8ZGRAvmytblQRuG07xpaCyWW6Wf03jkJTJVX x5Zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=tdsCErEUABqyyQ1mbx3uMSi/aufrxWWc3XxvUpZyi6c=; b=oG/oZjdgWSeiYpL11iP2dGcH9BAwXHJ9GG8MwLeFDvW3qkW4wM4UuKk0/q4ufzdOtF 9V8RwwJW8N3s/maiHSI4aGt64lH6ILS7w3Tc2KanncgOjERybdTRf4nZyHWkQRwaVFmr bbmCDDc9salfDmG6C5SgNHwPQenqmTS2aGKDylZwKmp/CL1u7Zk2nxye7iR2BtoWBeFY WY54lHOXGNRwRKu16pmGKTe9tfmhxFDf0sktGCoUIas2Jf81HvsQuA8iNG9kMEBW0iI+ 7U8UM1ov8u3x9wBuOPUsWLQL8LEy0/etgSWGmpafF30qmgVJi2ATAJxtVmL9cR0B61se jqcw== X-Gm-Message-State: AOAM5327m5vIGw+zbirMMYjYoH3mHXNlODTOZTRDPbHXOIE2T9XqlAzU OUYwJDSxyT1kuDf3QgMYLYOUoV4SHgXS X-Google-Smtp-Source: ABdhPJwSSTIWtOO8ktVy4rHrNPU+CIvJsJy3oLDvfo1jOaII6PMNjG5KAfWEfB/Wt+zdj/T+fCLv/8OQmHxo X-Received: from luke.lon.corp.google.com ([2a00:79e0:d:210:59ca:401f:83a8:de6d]) (user=qperret job=sendgmr) by 2002:a1c:5417:: with SMTP id i23mr5564552wmb.17.1634645589172; Tue, 19 Oct 2021 05:13:09 -0700 (PDT) Date: Tue, 19 Oct 2021 13:12:50 +0100 In-Reply-To: <20211019121304.2732332-1-qperret@google.com> Message-Id: <20211019121304.2732332-2-qperret@google.com> Mime-Version: 1.0 References: <20211019121304.2732332-1-qperret@google.com> X-Mailer: git-send-email 2.33.0.1079.g6e70778dc9-goog Subject: [PATCH v2 01/15] KVM: arm64: Check if running in VHE from kvm_host_owns_hyp_mappings() From: Quentin Perret To: Marc Zyngier , James Morse , Alexandru Elisei , Suzuki K Poulose , Catalin Marinas , Will Deacon , Fuad Tabba , David Brazdil , Andrew Walbran Cc: kernel-team@android.com, kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu The kvm_host_owns_hyp_mappings() function should return true if and only if the host kernel is responsible for creating the hypervisor stage-1 mappings. That is only possible in standard non-VHE mode, or during boot in protected nVHE mode. But either way, non of this makes sense in VHE, so make sure to catch this case as well, hence making the function return sensible values in any context (VHE or not). Suggested-by: Marc Zyngier Signed-off-by: Quentin Perret --- arch/arm64/kvm/mmu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index da10996dcdf1..0019b2309f70 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -239,6 +239,9 @@ void free_hyp_pgds(void) static bool kvm_host_owns_hyp_mappings(void) { + if (is_kernel_in_hyp_mode()) + return false; + if (static_branch_likely(&kvm_protected_mode_initialized)) return false; -- 2.33.0.1079.g6e70778dc9-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm