From patchwork Thu Feb 20 13:49:04 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Zyngier X-Patchwork-Id: 13983997 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 9CA661FC7C1; Thu, 20 Feb 2025 13:49:15 +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=1740059355; cv=none; b=mqZRK1by9BeLo6NN0NRrKar1Oplo29KMl/uN4EG68kl17p2hWRF9plWsq26573g8N1eRLYHrSPnbsfC5H9L158UBN+RkL3xTaBKf+LlBYzfrujlZvvcBMMef6n1Rg1eCtrSSCRKV6pO1iT0BwpL64JzYlrTTqy5+LtPw0R0peRk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740059355; c=relaxed/simple; bh=XPusa/GmQMNqrhdWCp6rHpZE8+86Ko8D1+HDlpC47Ks=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=I/fEbMQcM5LNPKznaEW8PsA9YNxevt4ADML675rWXxGZoF+vxMbLbiz7x+cLqJgTO2uacAa4HO8moJgxloko6OT79RD3I1we0s//3eyyLRdWWUWdpGlRtvjTpmDDmgx+R7PFniIogF8RQXMduM5dAdSlsu/16IR5n6sOMEanABE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Z3+CA5w2; 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="Z3+CA5w2" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 80329C4CEED; Thu, 20 Feb 2025 13:49:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1740059355; bh=XPusa/GmQMNqrhdWCp6rHpZE8+86Ko8D1+HDlpC47Ks=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Z3+CA5w2wo+D8OkEMEQJS6XhdrRz7RieBN0Jb2vJRZIR92i3OiHpq7VtmgHtO/oQF GKyYTbh9axo6Kgxex+rMUbp0TsCM8ruMMALh9i61VchNWrqYez9jR39fPAfIRuYDW9 JBuErhNImtDb8FFhp1JBACGRQfuxiggk9nCXwFkRMJ5Ddi7sWXkMyRkoJB6xBHlF6q 3elWoEcBONi69Qm4+AJupZmLpIYTLlX6v6wK38+cdYn/Nx5tUgL+iS1lu2YITp7kV4 x9CK+TNk5490nm0S/ynN5++qgAXL+ni+YvP/BMMZLo1I4RbVd+3WQpIEDhqpM2BAEw C1/W4DePHICXA== 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 1tl6vR-006DXp-Oh; Thu, 20 Feb 2025 13:49:13 +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 , gankulkarni@os.amperecomputing.com Subject: [PATCH v2 11/14] KVM: arm64: Make ID_AA64MMFR4_EL1.NV_frac writable Date: Thu, 20 Feb 2025 13:49:04 +0000 Message-Id: <20250220134907.554085-12-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20250220134907.554085-1-maz@kernel.org> References: <20250220134907.554085-1-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, gankulkarni@os.amperecomputing.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 87f165289fb9f..5de542b045ac8 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -2666,7 +2666,7 @@ 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),