From patchwork Sat Feb 15 17:38:13 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13976193 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 9F3431F9A85; Sat, 15 Feb 2025 17:38:24 +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=1739641104; cv=none; b=d3nO0V/LbkugDTuaDYumRlDsksIX/JMPLb02qqaSsIf2QSlkJzvO/oRrySfb58HAQ+1gZC7cXaqhQn4w71rRP4G09ydEUtpNHT+360JQ8hLRYgrNTwmb+y4XO2wHAv8Y2cgbW/jk41a6wBx3xK8fb9orCXYdiZRctW92pHFXBqQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739641104; c=relaxed/simple; bh=XuMX9D51rOvDLqugXxKyuaKFZB0IP1O1SmRry/eT/uc=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=jPAUzBQTf4mmEJQ/5x0j0aOd3Pp42VvgAKklrlhI9DeRQzYRdzcv/5cBeQIeKjBovsv9MNRSso/UpIF9pmtX999I+oPc3dRXDL1p04Bz6nR40dWEhycBgthzKTHlkN89S7QdKf7SIV2q7n5HLGE0hJrsZvN9VfXXjJR0dfG8HJE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WvHKozje; 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="WvHKozje" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 20B04C4CEE4; Sat, 15 Feb 2025 17:38:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739641104; bh=XuMX9D51rOvDLqugXxKyuaKFZB0IP1O1SmRry/eT/uc=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WvHKozjea013rJ5CdYymCIVcomvPnzedyhCWg+IFXMlR5hleGEXLFFZS8W211fmbQ nF7vJdiPsEysLCxJoUsb+mE0gzElLPRDbvAMg51XuHVcKRQ2IYdTwxb2Fmw4WdS+6d ys97uUvr/G+cTQ+1Nbbdf/+GpuGPTkn4TT5ZKtFsTAzJWwgW3TLSU4y3TLaBvsc8nt VTZ1srnGkkGHyFaTEVEHdAJfCJszhVKns9Rg1Kt+npGULYFuKW9Lva2Il2Iv62uvCK fKwOxCaWsMqY0Bc1goy2H7UkPNUXvt3Vjb0SRav2VywPsD2+QCWeQ1oLvxyolAQEzA 8WvCNQPC96oyw== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1tjM7S-004Pqp-E4; Sat, 15 Feb 2025 17:38:22 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Joey Gouly , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Eric Auger Subject: [PATCH 11/14] KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable Date: Sat, 15 Feb 2025 17:38:13 +0000 Message-Id: <20250215173816.3767330-12-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250215173816.3767330-1-maz@kernel.org> References: <20250215173816.3767330-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, joey.gouly@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, eric.auger@redhat.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false We want to make sure that it is possible for userspace to configure whether recursive NV is possible. Make NV_frac writable for that purpose. Signed-off-by: Marc Zyngier --- arch/arm64/kvm/sys_regs.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index c1e050a58fb2e..db7c4e791b99c 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2669,7 +2669,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_WRITABLE(ID_AA64MMFR3_EL1, (ID_AA64MMFR3_EL1_TCRX | ID_AA64MMFR3_EL1_S1PIE | ID_AA64MMFR3_EL1_S1POE)), - ID_SANITISED(ID_AA64MMFR4_EL1), + ID_WRITABLE(ID_AA64MMFR4_EL1, ID_AA64MMFR4_EL1_NV_frac), ID_UNALLOCATED(7,5), ID_UNALLOCATED(7,6), ID_UNALLOCATED(7,7),