From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C8963CD1284 for ; Tue, 2 Apr 2024 06:30:41 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1rrXeb-0004UN-ER; Tue, 02 Apr 2024 02:29:53 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rrXeZ-0004UA-9N for qemu-devel@nongnu.org; Tue, 02 Apr 2024 02:29:51 -0400 Received: from jackal.cherry.relay.mailchannels.net ([23.83.223.95]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1rrXeX-0000Sa-6k for qemu-devel@nongnu.org; Tue, 02 Apr 2024 02:29:51 -0400 X-Sender-Id: _forwarded-from|134.3.94.10 Received: from relay.mailchannels.net (localhost [127.0.0.1]) by relay.mailchannels.net (Postfix) with ESMTP id DB8736C19B4 for ; Tue, 2 Apr 2024 06:29:46 +0000 (UTC) Received: from outbound1.eu.mailhop.org (unknown [127.0.0.6]) (Authenticated sender: duocircle) by relay.mailchannels.net (Postfix) with ESMTPA id 337876C1AF0 for ; Tue, 2 Apr 2024 06:29:46 +0000 (UTC) ARC-Seal: i=2; s=arc-2022; d=mailchannels.net; t=1712039386; a=rsa-sha256; cv=fail; b=Ep0GptclR1b6pwcoJLhY4uy0qJKSzw8/6zo5yQHbGyPw7n4MoEV27orADdihq45Gw4CQXN yGUowzwWqGoQ5qe677nmUWkNbrC+Kulof3FuChVcTwk+wsStrJrrrnE2WhxHddsp4C/Mhn gSV5CApcafmNXpvGS1TC98hsMWLTXOdJKlXy2hJh6hnWuxZxn7H4ZwJh3xeFYzSkXbw3Rm gRHB9ll0XTCl9t1MOprpFPKAZqT3/IOP5h8cWX70rK31G2YCR10AkoTtZNNwYqpgwTi4He LmzzSbEvB7UCwscPsOouhJCCapkv7NXlyJ5Vqal+YOD+sD4KKERG/IxPN1eaVQ== ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=mailchannels.net; s=arc-2022; t=1712039386; 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: in-reply-to:in-reply-to:references:references:dkim-signature; bh=K3ckc+8a0AIBjXop3ZrA1Ec9emZFF4t05SJ+4BPS9bE=; b=8tYr0jNuqzhJmwI8QSK6whlIFCWH+NvSgV8+zh7c7m1ktDQNFHmL3RRyVJND12FeWkuu33 SH/tJJ1nYL0YeWpD4z+2RVX8UqFxBVrZLNToWAeqoslC/u/55H/y1S8f3wG9r7/nvUA5j4 nlddFRVTJ9sS1SE0zVmfY1oQaLwPgfQ/i5zcIS8ahMldqiaYcT3CtsH62mfmlLFkv1iIPy NYMHFQ/fXB6AFBiEoiM5oBCI4/M/oxbp2jzbGbC2FQvqg2so0FhycOWEQNxy6iyiCMEYP+ oQTpAh3Jtyx3xt7My8oGg8tW1LjkppDht3IwzsKa3/hmhmM134qzfB5jcPxyjQ== ARC-Authentication-Results: i=2; rspamd-5ffc56d49c-b7rxj; arc=reject ("signature check failed: fail, {[1] = sig:outbound.mailhop.org:reject}"); auth=pass smtp.auth=duocircle smtp.mailfrom=svens@stackframe.org X-Sender-Id: _forwarded-from|134.3.94.10 X-MC-Relay: Forwarding X-MailChannels-SenderId: _forwarded-from|134.3.94.10 X-MailChannels-Auth-Id: duocircle X-Thread-Ski: 352d317f6a69c95a_1712039386709_3701642773 X-MC-Loop-Signature: 1712039386709:3420191529 X-MC-Ingress-Time: 1712039386709 Received: from outbound1.eu.mailhop.org (outbound1.eu.mailhop.org [52.28.251.132]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384) by 100.98.182.134 (trex/6.9.2); Tue, 02 Apr 2024 06:29:46 +0000 ARC-Seal: i=1; a=rsa-sha256; t=1712039345; cv=none; d=outbound.mailhop.org; s=arc-outbound20181012; b=X/WCacVN+yv/Xm0shc9ivNFGm3vjp0nBt/GklBrYmvMlKsBsMbhDFO523kErJlP6Ihva9skwXJPzg 9iMEyyo43a/5RpCkGZKjcuZ+yIoPQRCPRzjIDAim/UmP0tHS3AjMmgwyh8vntEqwjHANl2ZN+9gRVL b/3TYimHwZYH17Pau7ZJ3oka3YWaJdWLciRCex7Zp6quCjaw+D1lHhytARah/4sryMSGoJRVfJVGTD /B1B+LO+/Ddvx+XELxUipgcgMENZakMdLLtPV3nk/hon7o152nVV0xcmXmNV91tps63i7GqW6n4UEt KybTwgrih5gBd+EqSqeNPuqGCpSU9fA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=outbound.mailhop.org; s=arc-outbound20181012; h=content-type:mime-version:message-id:date:references:in-reply-to:subject:cc: to:from:dkim-signature:dkim-signature:dkim-signature:from; bh=OeS1lRUOHLDWwbdCP5hXisgriZIRr5ijYBx0E79p3SY=; b=QtTMvF23Ty7e8GcC6BOBFoYn+JkMWYRsiJDT3TyFaABcJIjWofQ6LtvkW9nZl8mpzFNHzyX7f7kbB bwcrtzqgvlzAASa8ynhYqiblm37/BOGFldfTMMP7gHQuQVJiPObuEjyU5zztdpkbkn2lDBDDsSzewh piMBiIFttlB9JAdwGkB8mD8LZf1b2EFpzdIwZ/hOZcPHeHD6tc1mtASVmT2RmyOO5VKR6CoskfXF3s apGVu9K9TDnzHsuR46T6xJgJl29EHzy9QdRmOCsO5vtFoSSFcWx3LwmciS2pnDZiN6VsjIA2TaVZPl dgMMLyKoRBDDkrMbYacOxIEsQa1yEzA== ARC-Authentication-Results: i=1; outbound3.eu.mailhop.org; spf=pass smtp.mailfrom=stackframe.org smtp.remote-ip=130.180.31.158; dkim=pass header.d=stackframe.org header.s=dkim1 header.a=rsa-sha256 header.b=MRYfe90P; dmarc=none header.from=stackframe.org; arc=none header.oldest-pass=0; DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=stackframe.org; s=duo-1634547266507-560c42ae; h=content-type:mime-version:message-id:date:references:in-reply-to:subject:cc: to:from:from; bh=OeS1lRUOHLDWwbdCP5hXisgriZIRr5ijYBx0E79p3SY=; b=HwZQbsz3/Tdo2DxQKM791gii8LibmWQqMDwkv53Icp/3CmRh8lbQ3Sa6Hn0MduclVYzVACUNOGUv6 ttgjmQJFvCwfi+52GWQGLh1fd2S/++O0uc7LKbapN/l540R78rNdn6iNOwqPlPgdAV2yptj3Z8cfS8 ZBJIGRmIm3m++DDk= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=outbound.mailhop.org; s=dkim-high; h=content-type:mime-version:message-id:date:references:in-reply-to:subject:cc: to:from:from; bh=OeS1lRUOHLDWwbdCP5hXisgriZIRr5ijYBx0E79p3SY=; b=unwGSRrjnA3wsRpwJayxJQziQeGHzC83iBRIrUMR/j/0sCrqnUzch72Ak7AyYvCC8xL1mXrSAP5Q+ FvNN7BFSYzEt/kCZFAVsbHDU+mNkDRlfNklmHYvvEE+PJaGiwjK9u/wW2ceVRjiGvuD0rRVLxfVQ4q cG+Es0tsc8RV8iU+GqWaqxCK8qwWs3fM1C5dlNUKnChg6oiGfLX0H7xBimuoOLu3CgEwpibLsaxgfn uZdfFdsVMxdgizvVyj4ggBp2sIByZaOrVhjfBVptvng7davXPqLRb04w5dYe4+E2qqLLjDIXCU5YUT BJfBqYSKsZpGuRF1os4wDPvzydc1wIg== X-Originating-IP: 130.180.31.158 X-MHO-RoutePath: dG9ta2lzdG5lcm51 X-MHO-User: 4b9197dc-f0ba-11ee-b34b-eda7e384987e X-Report-Abuse-To: https://support.duocircle.com/support/solutions/articles/5000540958-duocircle-standard-smtp-abuse-information X-Mail-Handler: DuoCircle Outbound SMTP Received: from mail.duncanthrax.net (mail.duncanthrax.net [130.180.31.158]) by outbound3.eu.mailhop.org (Halon) with ESMTPSA id 4b9197dc-f0ba-11ee-b34b-eda7e384987e; Tue, 02 Apr 2024 06:29:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=stackframe.org; s=dkim1; h=Content-Type:MIME-Version:Message-ID:Date: References:In-Reply-To:Subject:Cc:To:From:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=OeS1lRUOHLDWwbdCP5hXisgriZIRr5ijYBx0E79p3SY=; b=MRYfe90PWO5Cuq9dB15rjc+mv7 GPUEO26Dki3WpKtixy1bE4Qyzs97bW7TEZpVj07hSe2vo286r4LMD5oajmXrar4ZOAI/KxbLzq7Fy zSrJ4o9vd8Ps+ohXZ0uFk6YYKhkaqbP15NJu/jQVSS8m1ILPIm14jnp+OQiUNCilB7H7LfvnCH/KW /xb+nt0SwlcQT5wUZOAc5JH9DiH7sTtnpfbBcuBOCy+eLL/rklxUOgT5/27anuCYzw1OZR4aYlrhr IdI8vXfVmcIEKrspLniZNGQHofWM6LlfySjO8oE/THVoOZTfXJ2lcIKp6i0s8HhIjI4zVuld1Sr7R 5eQZ4u7g==; Received: from ip-134-003-094-010.um41.pools.vodafone-ip.de ([134.3.94.10] helo=t14.stackframe.org.stackframe.org) by mail.duncanthrax.net with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1rrXeP-007A6C-2K; Tue, 02 Apr 2024 08:29:41 +0200 From: Sven Schnelle To: Richard Henderson Cc: qemu-devel@nongnu.org, Helge Deller Subject: Re: [PATCH 2/3] target/hppa: mask offset bits in gva In-Reply-To: (Richard Henderson's message of "Mon, 1 Apr 2024 20:08:42 -1000") References: <20240324080945.991100-1-svens@stackframe.org> <20240324080945.991100-3-svens@stackframe.org> <87jzlm1334.fsf@t14.stackframe.org> <87sf04xpzi.fsf@t14.stackframe.org> Date: Tue, 02 Apr 2024 08:29:41 +0200 Message-ID: <87o7asxooa.fsf@t14.stackframe.org> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=23.83.223.95; envelope-from=svens@stackframe.org; helo=jackal.cherry.relay.mailchannels.net X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_MED=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Richard Henderson writes: > On 4/1/24 20:01, Sven Schnelle wrote: >> Implement dr2 and the mfdiag/mtdiag instructions. dr2 contains a bit >> which enables/disables space id hashing. Seabios would then set >> this bit when booting. Linux would disable it again during boot (this >> would be the same like on real hardware), while HP-UX would leave it >> enabled. > > Pointer to documentation? There's no documentation about that in the public. There's this code since the beginning of linux on hppa in the linux kernel (arch/parisc/kernel/pacache.S): /* Disable Space Register Hashing for PCXL */ .word 0x141c0600 /* mfdiag %dr0, %r28 */ depwi 0,28,2, %r28 /* Clear DHASH_EN & IHASH_EN */ .word 0x141c0240 /* mtdiag %r28, %dr0 */ b,n srdis_done srdis_pa20: /* Disable Space Register Hashing for PCXU,PCXU+,PCXW,PCXW+,PCXW2 */ .word 0x144008bc /* mfdiag %dr2, %r28 */ depdi 0, 54,1, %r28 /* clear DIAG_SPHASH_ENAB (bit 54) */ .word 0x145c1840 /* mtdiag %r28, %dr2 */ So PCXL (32 bit) uses dr0, while 64 bit uses dr2. This still is the same on my C8000 - i see firmware still contains code reading dr2 to figure out whether space id hashing is enabled. The mfdiag/mtdiag instructions are described in the PCXL/PCXL2 ERS. https://parisc.wiki.kernel.org/index.php/File:PCXL_ers.pdf https://parisc.wiki.kernel.org/index.php/File:Pcxl2_ers.pdf There was a discussion mentioning disabling Space ID hashing in Linux: https://yhbt.net/lore/linux-parisc/199912161642.IAA11478@lucy.cup.hp.com/