From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 DC70C1C5486 for ; Thu, 14 Aug 2025 15:57:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755187026; cv=none; b=OKUelgnEX9DJSCPmO+ss5A0pmCxP98V54csHkoKGq0uxnZnrKYfAqTcqBmoC7upUvWzvebxMqO0keW+0sv2AQNlx9K8tklSHrXdjEhjcYGXgjOYnybRIYrNpuIS1drzaMxhMiw2aE5gGfxyw0+6R1bJudJDZb20Wolpqwsnl0hk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755187026; c=relaxed/simple; bh=3M6olNCkfBgg79SBlkoN6YaHd1iwdF64SMcb1OiDJSA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=aB5w7aj95JbptJ08nmSHLm99uP0MapV8KUgBPCL9vBaVkEnt7pBdwk4aAGscUCuQ4ZomVIAl5B0ok3O7w0XHvRmSM50ei6b7sGlRIFvnLfBuhM+gzl9IMqGhdTYOnqkyTWq4scHo46npZuiqNXglgrDBV+P8WS6qdw2GIjaLE/o= 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=TdxEwGQp; arc=none smtp.client-ip=209.85.216.73 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="TdxEwGQp" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-323267915ebso2100906a91.1 for ; Thu, 14 Aug 2025 08:57:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1755187024; x=1755791824; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=dZln5AlMLNKwBYNNEImRxFo070vZbrB9DRk7vU6UURM=; b=TdxEwGQp680idpRFkaffFdK9j7GHKtd7p0B29UQVSuabnfA2w/PCBvDYRy8uNIAdp3 2Y5CZBTrh01IMbtbuN0TC1TFA8fyxCGE+G8ohoVB/H/oj8UxAxTixfFfRNVXV97q3WU/ g4cY+A6R8ujxX4C3Ooxf+JA+qZRTku19B5IyqxR5x57wQLaFc5rOrT2rXQFbg0V4iV7r +8kgn3XF+x1GikM4XBnY3kMlNaGVQR+4Mwsq57HDwyubn8C4dObIfofApoqsr4N0+GkI k9zPrEXBpZhql8IPXm/fplOFzXcadAW77rhzFKkcKIsEo21l4TBVQU0Fbno336pW0x2r WwVQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755187024; x=1755791824; 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=dZln5AlMLNKwBYNNEImRxFo070vZbrB9DRk7vU6UURM=; b=VjYcinwO12rXyo0PnxcY6tQwAS4uR8PRFQUgXHvx9vDgsIxBsTotz6hc/a/jqHQl0w B2oHb30aBRFe03aVUZ+c3oO8xMsgcZ/WkzjvjoFbCDx5EsYCBghVvC9vHypxcp9D0LFh gbo7Z2SrOJ+cfglZmb6ZP+wHhqJyW5neHbr8nXXbSAMwlN3G8t6cQ2uGBftj3l9q7dc9 o1C9aAN67Vf8dTbkfer1d6X2XedW6YCcbBJhnFcBUbAUgsjX5rwOrdXNKAnsDohvRqT/ s/JvRNl8DQ81FK8XEKB7x8Zx/wB3kRzuGUANq2cDcIMVolpY0BQI8blnNafr0ZAXJTzg RzyA== X-Gm-Message-State: AOJu0YzqesU7mYsoZ5iRv4hjcbhyQCX8KW/A+1JPX2ShyTyNatCk4hJh BPi7uyZyreePEpI6NDRLVT0kJyVcH6Z91XbVUXa5lthe5/yZWzX4Z6Aer0eowOymmplN1CADnzf wG+qTiA== X-Google-Smtp-Source: AGHT+IGkerUL2cLZDPWZvUCNahk3WWBCW43AyTuiGoYr4yc4kIJylgBdsIjSlG0DmD363AxCXFB4LnLbAA0= X-Received: from pjbsb5.prod.google.com ([2002:a17:90b:50c5:b0:312:ea08:fa64]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3a45:b0:31f:1757:f9f4 with SMTP id 98e67ed59e1d1-32327a864d1mr5906907a91.24.1755187024068; Thu, 14 Aug 2025 08:57:04 -0700 (PDT) Date: Thu, 14 Aug 2025 08:57:02 -0700 In-Reply-To: <20250814125201.2090009-3-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <2025081208-petition-barcode-1e2a@gregkh> <20250814125201.2090009-1-sashal@kernel.org> <20250814125201.2090009-3-sashal@kernel.org> Message-ID: Subject: Re: [PATCH 6.15.y 3/3] KVM: VMX: Wrap all accesses to IA32_DEBUGCTL with getter/setter APIs From: Sean Christopherson To: Sasha Levin Cc: stable@vger.kernel.org, Maxim Levitsky , Dapeng Mi Content-Type: text/plain; charset="us-ascii" On Thu, Aug 14, 2025, Sasha Levin wrote: > From: Maxim Levitsky > > [ Upstream commit 7d0cce6cbe71af6e9c1831bff101a2b9c249c4a2 ] > > Introduce vmx_guest_debugctl_{read,write}() to handle all accesses to > vmcs.GUEST_IA32_DEBUGCTL. This will allow stuffing FREEZE_IN_SMM into > GUEST_IA32_DEBUGCTL based on the host setting without bleeding the state > into the guest, and without needing to copy+paste the FREEZE_IN_SMM > logic into every patch that accesses GUEST_IA32_DEBUGCTL. > > No functional change intended. > > Cc: stable@vger.kernel.org > Signed-off-by: Maxim Levitsky > [sean: massage changelog, make inline, use in all prepare_vmcs02() cases] > Reviewed-by: Dapeng Mi > Link: https://lore.kernel.org/r/20250610232010.162191-8-seanjc@google.com > Signed-off-by: Sean Christopherson > Signed-off-by: Sasha Levin > --- Acked-by: Sean Christopherson