From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 59B5C20B808; Tue, 12 Nov 2024 08:55:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731401752; cv=none; b=klBtLlOERJgxEBOQsohg025XFkAtkJKCSMoBF33VotIVFlhp47S5WQgl98v7v5GCEGw1qaMrICd1Js1SVeKEHc//UKDrE/RX544y0sD0KiPvmqEXpx4z+YSHTm9CWrz4WV7GzH4wLlzjUnE0Iu/uNe0cMX68U50bZI+yhVTcejY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1731401752; c=relaxed/simple; bh=9KPjbGFgKVffy1NdZyWY6hn+AJ5QYKBppGaPpt7/5Js=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=N5xtm/MuvpuBjnmMjweyQZ8lptxdJ8ihjCuTo8yu/6N5R02+RwJdbP0xJRVMyzCHfXP6NML1ikuylT9A/ox/h5jeYOnmvDnbOOwW7EmtOSv3AwFku0ZS6jfYkzx7kzpt9omuQyau1m4I7tkoFExH85MYtA3I2paHm9rn+H4KE98= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KVt4jXhY; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KVt4jXhY" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9FF33C4CED4; Tue, 12 Nov 2024 08:55:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1731401751; bh=9KPjbGFgKVffy1NdZyWY6hn+AJ5QYKBppGaPpt7/5Js=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=KVt4jXhYzwWoAmlLgCOxjuxiZq3oWsqyWjMnROJ2HPYwJhJJzlpyLYMC/DmYNY/ki cad1OzJ96MBYbzAOrGL/zJnXudP+iFjQwOlBiMbPS+VUEXdE64iK4nK4Ut13585PvP WHc8nrBwKIHFZoqsUn+tTQmkBCeQ1YYh1YpUB1F8zvwpxoCrq+xgYPr37xFSPpiIMi mpMDnSDj7iNYUy2uvg+wrqHIm9ZOBbpv/AJl7pTqjDQqWT9B1e96d8WhHAFbXs3hqt pjWv4e7HCYOnY1Gul840q+HDgnRo/fqx5Kx68PH2Nc+IQy34K0NdLIRFo518nNfJhj 8nhMP5aQY8vgA== Received: from [82.132.184.86] (helo=wait-a-minute.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tAmge-00C7Nt-WA; Tue, 12 Nov 2024 08:55:49 +0000 Date: Tue, 12 Nov 2024 08:55:21 +0000 Message-ID: <877c98u8zq.wl-maz@kernel.org> From: Marc Zyngier To: Jiaqi Yan Cc: oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, pbonzini@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, duenwen@google.com, rananta@google.com, James Houghton , Linux Kernel Mailing List Subject: Re: [RFC PATCH v1] KVM: arm64: Introduce KVM_CAP_ARM_SIGBUS_ON_SEA In-Reply-To: References: <20241031212104.1429609-1-jiaqiyan@google.com> <86r07v1g2z.wl-maz@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 82.132.184.86 X-SA-Exim-Rcpt-To: jiaqiyan@google.com, oliver.upton@linux.dev, joey.gouly@arm.com, suzuki.poulose@arm.com, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, pbonzini@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, duenwen@google.com, rananta@google.com, jthoughton@google.com, linux-kernel@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Fri, 08 Nov 2024 21:18:50 +0000, Jiaqi Yan wrote: > > There is also a kernel config called ARM64_RAS_EXTN but I believe it > is for the host CPU, not about VM's RAS. > > But taking Oliver's opinion into account, I think we want to remove > KVM_CAP_ARM_SIGBUS_ON_SEA. Wonder what your thoughts are. If we stick to a signal-based signalling (which I still dislike with a burning passion), then I agree it can be removed, as this is no different from a signal being delivered from the rest of the kernel. M. -- Without deviation from the norm, progress is not possible.