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 BC032C433EF for ; Mon, 25 Oct 2021 20:24:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A563560724 for ; Mon, 25 Oct 2021 20:24:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236405AbhJYU1I (ORCPT ); Mon, 25 Oct 2021 16:27:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36616 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235943AbhJYU06 (ORCPT ); Mon, 25 Oct 2021 16:26:58 -0400 Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 99952C06965B for ; Mon, 25 Oct 2021 13:13:14 -0700 (PDT) Received: by mail-yb1-xb4a.google.com with SMTP id w199-20020a25c7d0000000b005bea7566924so19171377ybe.20 for ; Mon, 25 Oct 2021 13:13:14 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=reply-to:date:message-id:mime-version:subject:from:to:cc; bh=c9TMSSQDkdJckQqgk1hQJ6Z3xWFgZz2oJuTapjWnAto=; b=Hmmi585al96YhjrNsBozCKeUSsjxcY+9cb3dVhw8c8LAOlBpL6FI6zre4ofU/j2I/J V862W70ij9ivO1OZv5jdgJxaJ15S8Ia/rZT6P7IabKA/GJNEUL6a0wqOS32GO/wzzTtF Hx5w4djmSNoIi4SvDjNkaq5c/xl2t986X98KgD2AV3CZkE+ajJ/ANEYrZsaVGkx5CYa5 7mhxXq5Byy5xgwFmlSplm6VWUcQobVycDE9HXKM5DooNjtSD2FtuwkkQRDeDFVnrUGRG ifhMl9/CMlLQ8EMsnorspXLn48zgLAklfYbmFEDiPYTggB7skFlhjYV32yZ8wKlb5Oe+ 29qg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:reply-to:date:message-id:mime-version:subject :from:to:cc; bh=c9TMSSQDkdJckQqgk1hQJ6Z3xWFgZz2oJuTapjWnAto=; b=ULRRrxpPVM1Jl47bVlnPyHpBQfNN/3/+h1f0DeGdubRvq5yCwWc5C9r9SkFUM0RdgH mH9PDgxUx5VCqfbPIfchQP+CPqoTbrnhriH+95VEKaYWT0nLcJeXOCX84WuSqlR+Fl82 wCGqcvsjUKtIDW45JfSKiy1XSKtZtg5COfuePpd3E2NTswRfx8a/f0MbgBDlYK5A6wgm 2ucQsaKd1y8NUzdcYMlepDzJjWVw1Xm/a5NoVoB+keeB7dIXco1+/tXTV9MiIQ2uJpWe mX8/Lq4Ug5Lp8BhdQYQUazx2x/knwM/MV0Au31RrLcp1v282s0FDPEBjBrqWONHPa/gy xsLA== X-Gm-Message-State: AOAM533Xs+Ws4avFJ/WLHiOiEIJkWlICDhJCnsEqci2XzCYrMSa3DQZC g00+02GVI0o7Um1zh/SQ8B3Adfb7dfA= X-Google-Smtp-Source: ABdhPJzn6GPUNwCw/iEfKewQMUshkaPgozSQ1anxYst/oAgSpVR/9rUQxDjo0whaxXVvN0vFpNOzpYrJQlc= X-Received: from seanjc798194.pdx.corp.google.com ([2620:15c:90:200:ffbb:dc28:15d8:6cdc]) (user=seanjc job=sendgmr) by 2002:a25:c88:: with SMTP id 130mr19489124ybm.176.1635192793836; Mon, 25 Oct 2021 13:13:13 -0700 (PDT) Reply-To: Sean Christopherson Date: Mon, 25 Oct 2021 13:13:09 -0700 Message-Id: <20211025201311.1881846-1-seanjc@google.com> Mime-Version: 1.0 X-Mailer: git-send-email 2.33.0.1079.g6e70778dc9-goog Subject: [PATCH 0/2] KVM: x86: Rep string I/O WARN removal and test From: Sean Christopherson To: Paolo Bonzini Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Remove a WARN that was added as part of the recent I/O overhaul to play nice with SEV-ES string I/O. For the record, my FIXME in lieu of a WARN was deliberate, as I suspected userspace could trigger a WARN ;-) Based on kvm/master, commit 95e16b4792b0 ("KVM: SEV-ES: go over the sev_pio_data buffer in multiple passes if needed"). Sean Christopherson (2): KVM: x86: Don't WARN if userspace mucks with RCX during string I/O exit KVM: selftests: Add test to verify KVM doesn't explode on "bad" I/O arch/x86/kvm/x86.c | 9 +- tools/testing/selftests/kvm/.gitignore | 1 + tools/testing/selftests/kvm/Makefile | 1 + .../selftests/kvm/x86_64/userspace_io_test.c | 114 ++++++++++++++++++ 4 files changed, 123 insertions(+), 2 deletions(-) create mode 100644 tools/testing/selftests/kvm/x86_64/userspace_io_test.c -- 2.33.0.1079.g6e70778dc9-goog