From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 E030A395D9F for ; Thu, 9 Apr 2026 22:42:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775774569; cv=none; b=CBck3nEY6CzuQckkTUQyiApkySpm4B+yPkhBo3/VgYJPWfJY4SXfdLYKYIR1qRQJV5ponupdSOwoJcIug0YEtI/SDBOkC47ynCh/QPyM7dtEWNRqKK4XK8M0WLtk6YmSVh9xxpQQoD/wqN+ToHaB4lQN0q8yfPWnMSVIXtiogo4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775774569; c=relaxed/simple; bh=lGG123UZ3kfKMZt8jrFqzHp5bXJWmH2OP6Oz27zmQvg=; h=Date:Mime-Version:Message-ID:Subject:From:To:Cc:Content-Type; b=S2TuntXf+WL19+x3edtTc9ERv2LoM6uzLyaCk4VaUWHXWB3go/d/yTU3ljcmsSp7ZKh69TO6+WLex7eBnzNADCWKrl68wexfElch1uOwLMou8DwNUQRNWh+TDMBM6ZqY9gszQzuXFUO6ubI6eAzNWzOBlm47OGKwj3JtYAw3g6Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=DflZ8Tyz; arc=none smtp.client-ip=209.85.210.202 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="DflZ8Tyz" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-82c714cb672so726576b3a.0 for ; Thu, 09 Apr 2026 15:42:47 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1775774567; x=1776379367; darn=vger.kernel.org; h=cc:to:from:subject:message-id:mime-version:date:reply-to:from:to:cc :subject:date:message-id:reply-to; bh=15sLIW3D0vI81woyhYAJLyhIBfYvreYNWS4YkFEu4As=; b=DflZ8TyzgT/QVlY1keRD6VVwMEav5b3UXPRDVmEemrogrI1EJ71bD3+zuZsKgvmgZf pes3dpIjeLyS5nXroZ0b49dVuYF93L0qnY36Cik/vUrOtVVlFq1REc0h9vkq9onjffKN eviULfCSrkrossn5JCpKmnZYebfKiahBAPMafoMu55Dm2bwJeXgECxd8Isl1T4XWM46K 5kOCtXreKtBhcPC5wtc018QcDIZyNpWa47mb+Vpc0YMf7mgzGorgKDiYHK1DdXOHFSuT UqYHxY+i/32dkOvUxi7QvXSJ0DJRlcpVDxN39R/6nBimqpah0Vpb2tg4Mak5RHLwT+RV iA1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775774567; x=1776379367; h=cc:to:from:subject:message-id:mime-version:date:reply-to :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=15sLIW3D0vI81woyhYAJLyhIBfYvreYNWS4YkFEu4As=; b=HOicTBjjTCw4WlAh/Obiix1b0jFo5pdcYwEt38uf9tWwe0+T4BQZkYCBtNJKeJDeHS HDoTLLodwhPRjNmmJWRhhMD0E3bsx0ljPZ6fRXpzCiKY7ZUY3VHtHhQzGKd88M/zfHDF 1xOfKV1EmvwPKmdH1dtlVHCzMsJddJMLVGk6iLQD6sunXO5deF3knZbqIaWTDxiZ00yH uKP3wQv64KiDAjJewzoGHyZmHYfcY1AwuVWmPxKzqgOyixPq4nC49zxrsxJwJdDOkhHc nawS/8B6a1nWF9/frLDL9eGwYdV71lQXkT151zEwyphFiOLgKLNR0pcFtYT53hPdWtXY l9GA== X-Forwarded-Encrypted: i=1; AJvYcCUfUv04sWRiTb2nGXJliWl6eaN6g/N8Jop+296BQZsOIpJZ1vPyenkePn4iUMr0I84FmDsDCh1HROloCe0=@vger.kernel.org X-Gm-Message-State: AOJu0Ywen8EPhTXpUisL6mIvw9o5LqxOny+1BZyBA3wG42maOz9drQ9K I6d2gDmHENXRAoDbEYWsHuY0fUwZpmLYYkAAgvd+i42ZC5TD8bqfKNQb8x59sW092h/uSnlhHRF JFmaafw== X-Received: from pfbfb10.prod.google.com ([2002:a05:6a00:2d8a:b0:829:9082:12ca]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:892:b0:82a:81b6:d8a6 with SMTP id d2e1a72fcca58-82f0c302aafmr951868b3a.25.1775774567069; Thu, 09 Apr 2026 15:42:47 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 9 Apr 2026 15:42:29 -0700 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 X-Mailer: git-send-email 2.53.0.1213.gd9a14994de-goog Message-ID: <20260409224236.2021562-1-seanjc@google.com> Subject: [PATCH v2 0/6] KVM: x86: Reg cleanups / prep work for APX From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini , Kiryl Shutsemau Cc: kvm@vger.kernel.org, x86@kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, "Chang S . Bae" Content-Type: text/plain; charset="UTF-8" Clean up KVM's register tracking and storage, primarily to prepare for landing APX, which expands the maximum number of GPRs from 16 to 32. v2: - Call out the RIP is effectively an "EX" reg too (in patch 2). [Paolo] - Rework the available/dirty APIs to have an explicit "clear" operation for available, and only a full "reset" for dirty. [Yosry, Paolo] v1: https://lore.kernel.org/all/20260311003346.2626238-1-seanjc@google.com Sean Christopherson (6): KVM: x86: Add dedicated storage for guest RIP KVM: x86: Drop the "EX" part of "EXREG" to avoid collision with APX KVM: nVMX: Do a bitwise-AND of regs_avail when switching active VMCS KVM: x86: Add wrapper APIs to reset dirty/available register masks KVM: x86: Track available/dirty register masks as "unsigned long" values KVM: x86: Use a proper bitmap for tracking available/dirty registers arch/x86/include/asm/kvm_host.h | 32 +++++++++-------- arch/x86/kvm/kvm_cache_regs.h | 62 +++++++++++++++++++++++---------- arch/x86/kvm/svm/sev.c | 2 +- arch/x86/kvm/svm/svm.c | 16 ++++----- arch/x86/kvm/svm/svm.h | 2 +- arch/x86/kvm/vmx/nested.c | 10 +++--- arch/x86/kvm/vmx/tdx.c | 36 +++++++++---------- arch/x86/kvm/vmx/vmx.c | 52 +++++++++++++-------------- arch/x86/kvm/vmx/vmx.h | 24 ++++++------- arch/x86/kvm/x86.c | 20 +++++------ 10 files changed, 143 insertions(+), 113 deletions(-) base-commit: b89df297a47e641581ee67793592e5c6ae0428f4 -- 2.53.0.1213.gd9a14994de-goog