From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 7B66D13A86C for ; Fri, 6 Jun 2025 16:30:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749227440; cv=none; b=brmfuulwBrRwzmksTDSSeJHiUrwS2K7Qki3E1Mty2+gdtrdVit76MKVS9MoRtn9AGJMIQZmIETIHXcsn6cykn5JGUaXBZefkoYdE6rybeuH4JSeS4SMAr1deLOtTGXwLOrVBIxiOe0JwsxBLBL75BtMb5WqP2AsiCcCWrHCc3OE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749227440; c=relaxed/simple; bh=If3SHFV9BXuXwcKjic0mO7s+6R902Ahr/7djWF8FbuQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=Kc2WCqlasOcnNEPYpaApSonxOaejyoi2M6pgv9xj8ZYIwQQBBYqstN8Tj83daO/hmyEBLJpEO0GcCXvmbuAlZzFHVIs1mKvypl90P3dc13tZQwO2NrhxKtx6hg4wWqnHrQ0fWm/iBNv5obWPP5gnjb8IuhyPFOLrd3K5j1cd/3g= 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=mJ0ME9Hw; arc=none smtp.client-ip=209.85.215.201 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="mJ0ME9Hw" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-b2c38df7ed2so1653087a12.3 for ; Fri, 06 Jun 2025 09:30:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749227439; x=1749832239; 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=PeZDoSbBvqkhPAnxH1AxtEkHDzzgin1oETJTbTd+Zhs=; b=mJ0ME9HwFOS8xYirpNsRajmu0+OhLCrV38244snO4KUQm57GazPQ+1wEaoX2dTsVKg I/o9dtxMDYmzTdl9v9CtOPEjDmPfY802gpo/DQSevPANV9YKsgDKpb3MexBEH7Lrk390 At3wgzt2WA/GDAK5/64gblGtLOpD83I2FtoXZOeux/3ufexRsJwSAuwXxx/VhNEJZBIM CToyOAx+vBxloNnqAMGLabtV2rvXR0WPt94adzXCHZMIMplLl1xB2CyTBbCpmxpDLHFd OiZQ96rJTjO+xmy2yx8vgk6/+lSvuOqHV1EGPkbcdMh3+mjuFK/hEnwxek0310H+b2rH vv4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749227439; x=1749832239; 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=PeZDoSbBvqkhPAnxH1AxtEkHDzzgin1oETJTbTd+Zhs=; b=BCAe/uMvwUfwVa+WzS1DfcF+96B4pRKd67sQgyPuPeVhQrzV8+nvK7ZjKFbe0Z7BLD qsD7Y9kwikPjWaJXZTBf5zC/bSEYcG4fnSsh4QlPIf3ctxl0/W8QEmmcCyztEyBQg/oR dJkvBIp6Myw9wpUdvYQ55CQ37WVezcXb89m4fUwNJqziK2rWM090kficTSjaQS/tDbUM kDE1QtM1w1tN7MVB29VqCvmBm7THuHdpjBF5faQgTXREDX+jCHo7o9AaVZGxocy1xOWD c+uVB2OF53Leb1t99jMw3rWxYqhRPrKh/CmfEOw4s4Z0RRhu9DihQ6XC1bs+YqI0KFdr aDcQ== X-Forwarded-Encrypted: i=1; AJvYcCVqIGsV1mvY32q5vSJcxaTwxRBJKAGRmKf6UgiFuWZoz7MRUz1TsLwpuQhuK7yj5Etnxlg=@vger.kernel.org X-Gm-Message-State: AOJu0YyqhhH7didbopa9M0n0mk8hPMV0zCuZhENglCQGtskihbcEHUww m6qTMRd9DeRqE9vyDlAJBzvnCASiSJBOhKyiVt+3IprNQ97ixTEftPLLYFPD1NfNt5Q67fwZYKA e03XP3A== X-Google-Smtp-Source: AGHT+IHke24X9i3QXxhH+WOCf5tN70TEkBtw4F1fB6ZHJgw9mRBnHIQUbobGqbQD12aEDHqeBnktZkH7jjw= X-Received: from pjuu14.prod.google.com ([2002:a17:90b:586e:b0:311:ef56:7694]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:d88f:b0:312:f0d0:bc4 with SMTP id 98e67ed59e1d1-313472c04b5mr5729832a91.5.1749227438821; Fri, 06 Jun 2025 09:30:38 -0700 (PDT) Date: Fri, 6 Jun 2025 09:30:37 -0700 In-Reply-To: <20250401161106.790710-21-pbonzini@redhat.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250401161106.790710-1-pbonzini@redhat.com> <20250401161106.790710-21-pbonzini@redhat.com> Message-ID: Subject: Re: [PATCH 20/29] KVM: x86: add planes support for interrupt delivery From: Sean Christopherson To: Paolo Bonzini Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, roy.hopkins@suse.com, thomas.lendacky@amd.com, ashish.kalra@amd.com, michael.roth@amd.com, jroedel@suse.de, nsaenz@amazon.com, anelkz@amazon.de, James.Bottomley@hansenpartnership.com Content-Type: text/plain; charset="us-ascii" On Tue, Apr 01, 2025, Paolo Bonzini wrote: > Plumb the destination plane into struct kvm_lapic_irq and propagate it > everywhere. The in-kernel IOAPIC only targets plane 0. Can we get more aggressive and make KVM_CREATE_IRQCHIP mutually exclusive with planes? AIUI, literally every use case for planes is for folks that run split IRQ chips. And we should require an in-kernel local APIC to create a plane.