From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from out-179.mta1.migadu.com (out-179.mta1.migadu.com [95.215.58.179]) (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 54DA71DF25C for ; Wed, 7 May 2025 07:57:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=95.215.58.179 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746604631; cv=none; b=a2FE14lW0MzH+byvFAnZvcSjKbvL3+HK8tjLpGXzj1H891I7qmf1yvA7y2gWipUFfB0YtALyDAgTBiO7mQptuAwFOvU3yKe3npAmsC4bJW/P5Izcmu5TZ81UaV4oYFLC1pAu101KyoCAoAMmF3x8Yz/PhPtukQmUnavViA3Q0j4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1746604631; c=relaxed/simple; bh=uuJWPfHJXcnB4dBIwpisrMyjhNK9JSAOkWSSPue3dkQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version:Content-Type; b=HoJ4YMXvqDHdbsXjnWyg/WWjv+kdR9kFeHy/oO38lTLi6zrhyMOb4N/VbZnFmKaOBVGgXUeDGmnlQptyttHa+xcXIy6n7MXfvyer18S9YJIPM0YmeTA75W7wOwdDXaa41+g0jgqPUsD04htSMI9EOxO94MapsADv/1aCll+Wi48= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b=krCymqbL; arc=none smtp.client-ip=95.215.58.179 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.dev header.i=@linux.dev header.b="krCymqbL" X-Report-Abuse: Please report any abuse attempt to abuse@migadu.com and include these headers. DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.dev; s=key1; t=1746604626; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=nHAbVa6E1A/wHvD5/4+iVSocKc6b/G3IZErcqqcFL0s=; b=krCymqbLFkpq88vV/Mhy4It39SJqdhzNcJtBDki6dLsYGxo/0LkfTarWJ4hw2m9MsghJ/K dUDJZJvsi5y+TSOOUJd78Eap71hGr0jO49hbYlhznHBcDrCkTufg5nfuPxwd6IIuomgo+X NfzwyoYrIAvLzcA73mtDg0KTiSdOQAI= From: Oliver Upton To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org, Marc Zyngier Cc: Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Ganapatrao Kulkarni Subject: Re: [PATCH 0/2] KVM: arm64: Make AArch64 support sticky Date: Wed, 7 May 2025 00:56:49 -0700 Message-Id: <174660459090.2542293.281555922316726481.b4-ty@linux.dev> In-Reply-To: <20250429114117.3618800-1-maz@kernel.org> References: <20250429114117.3618800-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Migadu-Flow: FLOW_OUT On Tue, 29 Apr 2025 12:41:15 +0100, Marc Zyngier wrote: > It's been recently reported[1] that our sorry excuse for a test suite > is writing a bunch of zeroes to ID_AA64PFR0_EL1.EL{0,1,2,3}, > effectively removing the advertised support for AArch64 to the guest. > > This leads to an interesting interaction with the NV code which reacts > in a slightly overzealous way and inject an UNDEF at the earliest > opportunity. > > [...] Applied to fixes, thanks! [1/2] KVM: arm64: Prevent userspace from disabling AArch64 support at any virtualisable EL https://git.kernel.org/kvmarm/kvmarm/c/7af7cfbe78e2 [2/2] KVM: arm64: selftest: Don't try to disable AArch64 support https://git.kernel.org/kvmarm/kvmarm/c/b60e285b6acd -- Best, Oliver