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 1F55AC0218F for ; Sun, 2 Feb 2025 21:47:37 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1teho1-0002xH-9n; Sun, 02 Feb 2025 16:47:05 -0500 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 1tehnz-0002wv-Em for qemu-devel@nongnu.org; Sun, 02 Feb 2025 16:47:03 -0500 Received: from mail-pl1-x62e.google.com ([2607:f8b0:4864:20::62e]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1tehnx-0003Ac-Ay for qemu-devel@nongnu.org; Sun, 02 Feb 2025 16:47:02 -0500 Received: by mail-pl1-x62e.google.com with SMTP id d9443c01a7336-216728b1836so60288175ad.0 for ; Sun, 02 Feb 2025 13:47:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1738532819; x=1739137619; darn=nongnu.org; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=HfpE/R9iLcGVeARr5s0wabl+HdNGI9pRHFGDnTtin5Y=; b=jgR3WQUraS6RGkqZE5itCm7xAmAS4YaFaFSVrH7+e8diGEd9/b1qBb5UHIs/eglpxD Or3SzG7kBhvnmxBp56K24+V+Peh0/G3/bXDXnjaG+1D/kYJAmouotpJOlJ8W+KfORwEJ CVmUqtNAKTKo6dd2ImbdCYV1sJOq6JLzaP0GrmRdgtGzVzhSpYvGxgJJpHpWe3olrSQ5 zZUfeVlu1MEWb9hX+3p9nzCC09yqygUzt8T+v6ScOIKyXMcsnxt4hKOY2xaLhANvPlvO lTY7crHT1eqpT7y9Viq+FZ9YcSYxGpI49gO02OK3b+xEzBLEm/BPdVKuc0OQcy7nzXoS yQ4w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738532819; x=1739137619; h=content-transfer-encoding:in-reply-to:from:content-language :references:cc:to:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=HfpE/R9iLcGVeARr5s0wabl+HdNGI9pRHFGDnTtin5Y=; b=wzcXaDZ/WIgpqiXeXrTOC1H3qlJ9aG1aOgpFJpuVIeF81k2S955dokBELSrQPYzSsi YwWwn281s7CzGX9OPo7DlWHutl0XB6cdUehCqB9wraVwM3mYRsHGvAmLaE4glkUonvXf dFH6z+h3LBD1uVe0RJliz/jKpCT7Dlslsdr42cTlEBkv9kp726ib/Z8DxmfGFGNwd1Ln 8H+2tZzB6rGz+NvTPDm1JPZxbro70nZ4dt/EbGzDf3Kf9eQwMo5h55DOb0vjzsyM8kMo hZZGoNiJOV/hBQ3TZQf56zIFwVFPulxQ82aWylxKY4DO4kXvKoqvz08j2HTQJfOCfffY y8Mg== X-Forwarded-Encrypted: i=1; AJvYcCV/z9aIHpmALVnaHe5oJ6GkjoxOZ1pLoJJvoMVh/UMsbhdtqgRkBjIIRvfTHdMTJWw4XUe+ftqRIlQH@nongnu.org X-Gm-Message-State: AOJu0YwiqcwtHKTXexK69L4Uf/sVRCAsELFbE740Kf1rBjA4TDUTOvZg P6dy5lNjiyf/x+qlG/6ZjM6pHJNMla1YHAfFacsECgkn25rpiCb7bqbs2lnmNUU= X-Gm-Gg: ASbGnct+9gLCg9KGyUvs1AUgT27wcvDIbrRMIlAIjet5iXuC07Kw6fch8pdRHuKx+FL EKlYWS6EzkCR+r9igSZn+NbGx6Lj8mPeoxYOGZnEeTrE3vD94lR06oXFoyoMOv4QAsX0leBEcWu vI5TGeRikyUz0EvYpne2Qy3hxADCZSlihax097ItC+yg3m+NccZVMvxDNq9ZaxdF7yUgUDQap0S QMkpBELF8rorm4q6zpsqjvwroSHcRfsWj54l9zJ31ZKzJvQqQGmVTm7oEExzw107H/HkPnzZecZ KygQpFv9FSdApavKVrWbDaQZkrv94vcJ26SDaeM0mxpDFaWDMZhlYJI= X-Google-Smtp-Source: AGHT+IE7y2M78+08sErnIBZnhxFQRY9Ki7GVycvbnsIWa2Q+4YBudk5MZZYcTWf7yDypvm9qkema7w== X-Received: by 2002:a05:6a00:e8a:b0:72a:bc6a:3a87 with SMTP id d2e1a72fcca58-72fd096a0a5mr29285553b3a.0.1738532819173; Sun, 02 Feb 2025 13:46:59 -0800 (PST) Received: from [192.168.0.4] (71-212-39-66.tukw.qwest.net. [71.212.39.66]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-72fe69ba322sm6967923b3a.110.2025.02.02.13.46.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 02 Feb 2025 13:46:58 -0800 (PST) Message-ID: <99ea71e8-b978-41c6-8ba5-f056935ea39e@linaro.org> Date: Sun, 2 Feb 2025 13:46:57 -0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] target/sparc: fake UltraSPARC T1 PCR and PIC registers To: Artyom Tarasenko , qemu-devel@nongnu.org Cc: Mark Cave-Ayland References: <20250131214528.117846-1-atar4qemu@gmail.com> Content-Language: en-US From: Richard Henderson In-Reply-To: <20250131214528.117846-1-atar4qemu@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=2607:f8b0:4864:20::62e; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x62e.google.com 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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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 On 1/31/25 13:44, Artyom Tarasenko wrote: > fake access to > PCR Performance Control Register > and > PIC Performance Instrumentation Counter. > > Ignore writes in privileged mode, and return 0 on reads. > > This allows booting Tribblix, MilaX and v9os under Niagara target. > > Signed-off-by: Artyom Tarasenko > --- > target/sparc/insns.decode | 7 ++++++- > target/sparc/translate.c | 20 ++++++++++++++++++++ > 2 files changed, 26 insertions(+), 1 deletion(-) > > diff --git a/target/sparc/insns.decode b/target/sparc/insns.decode > index 989c20b44a..504147563c 100644 > --- a/target/sparc/insns.decode > +++ b/target/sparc/insns.decode > @@ -96,7 +96,10 @@ CALL 01 i:s30 > RDTICK 10 rd:5 101000 00100 0 0000000000000 > RDPC 10 rd:5 101000 00101 0 0000000000000 > RDFPRS 10 rd:5 101000 00110 0 0000000000000 > - RDASR17 10 rd:5 101000 10001 0 0000000000000 > + { > + RDASR17 10 rd:5 101000 10001 0 0000000000000 > + RDPIC 10 rd:5 101000 10001 0 0000000000000 > + } > RDGSR 10 rd:5 101000 10011 0 0000000000000 > RDSOFTINT 10 rd:5 101000 10110 0 0000000000000 > RDTICK_CMPR 10 rd:5 101000 10111 0 0000000000000 > @@ -114,6 +117,8 @@ CALL 01 i:s30 > WRCCR 10 00010 110000 ..... . ............. @n_r_ri > WRASI 10 00011 110000 ..... . ............. @n_r_ri > WRFPRS 10 00110 110000 ..... . ............. @n_r_ri > + WRPCR 10 10000 110000 01000 0 0000000000000 > + WRPIC 10 10001 110000 01000 0 0000000000000 > { > WRGSR 10 10011 110000 ..... . ............. @n_r_ri > WRPOWERDOWN 10 10011 110000 ..... . ............. @n_r_ri > diff --git a/target/sparc/translate.c b/target/sparc/translate.c > index 7e5c7351cb..285c9b0a59 100644 > --- a/target/sparc/translate.c > +++ b/target/sparc/translate.c > @@ -2882,6 +2882,15 @@ static TCGv do_rd_leon3_config(DisasContext *dc, TCGv dst) > > TRANS(RDASR17, ASR17, do_rd_special, true, a->rd, do_rd_leon3_config) > > +static TCGv do_rdpic(DisasContext *dc, TCGv dst) > +{ > + tcg_gen_movi_tl(dst, 0UL); > + return dst; > +} return tcg_constant_tl(0); > + > +TRANS(RDPIC, HYPV, do_rd_special, true, a->rd, do_rdpic) Surely reads are not allowed in user mode. r~