From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=209.85.214.197 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793631530; b=f2CoRZ9t2pSopjl/cWvqfMC9jN/5BNs9gIPnN7Coqmy94uwZU+gPGNeS/P4nVAelX35C g7oplgTM5mOpSsGx9su1+jrLGd/5P83n1eYmjNMDVP8qLQG+FABc1k+VznmrFQDcz+B6f V2iFVZu8ySHyqj1YxRjbmqcf8XGDUKWPbzi8DBNy08mlmBC4CUeZyZFjVBvRqlNJCzIf8 f4Mva9Nls616wDjVoRuRJMEDBN/PDGxR1P4cKYoklLxpdf0R97fdhhKrAY8XtS98y1a/k XDyVirSYPjgqUK+yCrM/dAksYK7P+nWPaHG7qHAlXdZ4xW0QZbAPy6F2jkkYKvR5esg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793631530; h=DMARC-Filter:Received:DKIM-Signature:X-Google-DKIM-Signature: X-Forwarded-Encrypted:X-Gm-Message-State:X-Received:Date:In-Reply-To: Mime-Version:References:Message-ID:Subject:From:To:Cc:Content-Type; bh=BGZaLVl/bf+VQNDSvC9YaFRzMNQ+JkOw52QT0TU0FxI=; b=zLgm0dYsfbQKQI5fEqtCMWhYkkxaA7rKIWl+4k++nzmlaAL2x+ltxzwmhgwliyXF32oB mN6/ErOdOC0W0KwprBBhZWn9ilgjVw+f0UARiwBcAx3wRwACrWyhaR3tiW+OyuaUgs841 fkqfXmvKrLmDUx+VyxXfjX0cYZprXWN+mO4vx9X/3YWVFE9geqNTByDwrRIvuD82S/Z2a qa694KT0smnmzMlY4E9pxsXfJMFas3+dZ8acf4K2yxti3TvIHolo51HYMZFfhAUMRrTCG GbKX9U2DYb8HvvbEcpch0NRNJ8HYav/bVCJt2LUgbmj2ZXd1XkbMvUjtDsCzP1zTrPg== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20260707 header.b=TZywBXE3; arc=none smtp.remote-ip=209.85.214.197 Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EFE20606C3D2 for ; Mon, 2 Nov 2026 14:58:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org EFE20606C3D2 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, unprotected) header.d=google.com header.i=@google.com header.a=rsa-sha256 header.s=20260707 header.b=TZywBXE3 Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-2e869e00005so49284795ad.2 for ; Mon, 02 Nov 2026 06:58:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20260707; t=1793631529; x=1794236329; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:from:to:cc:subject:date:message-id:reply-to :content-type; bh=BGZaLVl/bf+VQNDSvC9YaFRzMNQ+JkOw52QT0TU0FxI=; b=TZywBXE3oo1AuLBH7fBdMETQ/ZJUgYCO5nOgYZhMM2/RSWMHeOnBsVWpkN2kAt7KvD 74dzAt9PIPbwp/6+RUsGUMXtWVUoMV3MdAigrrJIZiU/oT21l+cUq8atuQ+RAalmSlHk g3RJ7DyQkTdkIAvVBxgZUe0Sz810/Xb582RtJwJCvscY3ni5bJfSTeCbvv+C4vp62UV3 an0957++A+LpFnNFNacx9MYI7lnZMrH8MOcXyiWyZ5j8n9FueDIB/nvRaAJodCsoUOg1 oMXcKKC21ctT7VDibGCwQcUAZ00IKICYtJZusuhXMeMnt4qTZRFqLClfq3HFOkmznWQ7 q4pw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1793631529; x=1794236329; h=content-type: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:content-type; bh=BGZaLVl/bf+VQNDSvC9YaFRzMNQ+JkOw52QT0TU0FxI=; b=xU/Sy8xbavCcdc1i3MBFmfhJ9Gd9nk2y0lUxG2qV8aIVBuzmhrUCuf8SNL6eZb85Oi 5M/oT+jatPPTz/ketHvTk60IvhxI5WvEqui7pQSxdr09qMG6vjN3NFpIgyYkgsZBO7Zg tPaUNfAUoySsPJQ2s97I2JpRQj2Zlj6vpoN4lO9BkzLb0CiGRto2zWKXRmSLaxSc/bZc TmL/EBNPSlOH6RKl447Lz0YTpCfKmhYPixC0OaY+OezOQMGE4Co6XPhB/qRA7SGCyWCd dLmdwOW3/ExH2lRtlHCbNlNU9Vv+lp3p0xVVzqTQ6a05bLSlYUCDEAbRn+0LkU2XDM7o fMVw== X-Forwarded-Encrypted: i=1; AKwUvBwxEUqfQTXKcYYTH/iVJXhcnOC3vxsqeetIfPyQPb02Vhv7aJjd1jZvfmfYteDzjPxdqA5OIpgKNPk=@vger.kernel.org X-Gm-Message-State: APuU4Z/upvenmjt8YEAD/h5dz4OWLR80Qqj2lN0ISdkhZrBzO5Mxrta+ T4zNG1zHz7/rSGxhvyuY8KwwK29f3C0ImTjCBzMH0TMDcpETNIQ3UT+tsBIBjlALOeuANqgeTM5 TZtVosg== X-Received: from plnl5.prod.google.com ([2002:a17:902:fd85:b0:2ea:44fa:2c44]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:f691:b0:2e2:d39f:182f with SMTP id d9443c01a7336-2eb3643d489mr99134825ad.28.1793631529137; Mon, 02 Nov 2026 06:58:49 -0800 (PST) Date: Mon, 2 Nov 2026 06:58:48 -0800 In-Reply-To: <20261102074657.27715-1-jtornosm@redhat.com> X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list Mime-Version: 1.0 References: <20261029165845.GQ1685504@ziepe.ca> <20261102074657.27715-1-jtornosm@redhat.com> Message-ID: Subject: Re: [PATCH v3 2/8] KVM: add PCI MSI hypercall for VFIO passthrough From: Sean Christopherson To: Jose Ignacio Tornos Martinez Cc: jgg@ziepe.ca, alex@shazbot.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org, bhelgaas@google.com, jjohnson@kernel.org, johannes@sipsolutions.net, kevin.tian@intel.com, kvm@vger.kernel.org, kwilczynski@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-wireless@vger.kernel.org, lpieralisi@kernel.org, mani@kernel.org, pbonzini@redhat.com, robh@kernel.org, vkuznets@redhat.com Content-Type: text/plain; charset="us-ascii" On Mon, Nov 02, 2026, Jose Ignacio Tornos Martinez wrote: > > I probably would not have selected this, it is why I suggested > > virtio-msi or something that could be optional and seperate from the > > core KVM guest ABI. > > > > But maybe there is interest in doing it this way? > > Since there was no feedback from KVM maintainers, NAK to adding any KVM-handled hypercall, and probably NAK to any approach that requires KVM changes. With regard to timing, please show a little patience and awareness. It's Monday. You posted a fairly large series on a Thursday, during a merge window. If you change direction after ~2 days for a series of this natures (touchs multiple subsystems and introduces guest/host ABI), you're likely going to end up with severe whiplash.