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[174.21.150.71]) by smtp.gmail.com with ESMTPSA id me5sm303280pjb.19.2021.02.08.14.55.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 08 Feb 2021 14:55:35 -0800 (PST) Subject: Re: [PATCH v2 63/93] tcg/tci: Use ffi for calls To: Stefan Weil , Paolo Bonzini , Peter Maydell References: <20210204014509.882821-1-richard.henderson@linaro.org> <20210204014509.882821-64-richard.henderson@linaro.org> <9d107cb2-ee8c-2a89-e004-9996a647a060@weilnetz.de> <9f552075-1783-dc8b-f338-23e12a138ffd@linaro.org> <69d3bc09-aeb8-6a40-157e-bf0dc19c0035@linaro.org> <2a61b461-c460-3b25-edd8-30e52b2eb578@redhat.com> <02ea197e-7ad0-0d85-78d7-c58f4aeceddc@weilnetz.de> <61a56eac-8afc-fa52-1681-21607b5294fd@linaro.org> <9f4e07d9-be5c-8bf4-f54a-424a844e8e7e@weilnetz.de> From: Richard Henderson Message-ID: <4ad3bbc7-20ef-974c-668e-260dfb81ee8b@linaro.org> Date: Mon, 8 Feb 2021 14:55:33 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <9f4e07d9-be5c-8bf4-f54a-424a844e8e7e@weilnetz.de> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::629; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x629.google.com X-Spam_score_int: -23 X-Spam_score: -2.4 X-Spam_bar: -- X-Spam_report: (-2.4 / 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, NICE_REPLY_A=-0.265, 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: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: QEMU Developers Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On 2/8/21 11:04 AM, Stefan Weil wrote: > > Am 08.02.21 um 18:39 schrieb Richard Henderson: >> On 2/8/21 5:07 AM, Stefan Weil wrote: >>> Richard, this commit is also the one which breaks qemu-system-i386 on sparc64 >>> for me: >> You'll have to give me more details than that, because qemu-system-i386 works >> for me on a niagara5 w/ debian sid. > > > I am testing on a similar Debian system (debian-ports unstable), but with a > Niagara3 cpu: > > Linux gcc102.fsffrance.org 5.10.0-3-sparc64-smp #1 SMP Debian 5.10.12-1 > (2021-01-30) sparc64 GNU/Linux > > gcc (Debian 10.2.1-6) 10.2.1 20210110 > > $ cat /proc/cpuinfo > cpu        : UltraSparc T3 (Niagara3) > fpu        : UltraSparc T3 integrated FPU > pmu        : niagara3 > prom        : OBP 4.34.6.c 2017/03/22 13:55 > type        : sun4v > ncpus probed    : 256 > ncpus active    : 256 > D$ parity tl1    : 0 > I$ parity tl1    : 0 > cpucaps        : > flush,stbar,swap,muldiv,v9,blkinit,n2,mul32,div32,v8plus,popc,vis,vis2,ASIBlkInit,fmaf,vis3,hpc > Ok, I've reproduced something on a T3 (gcc102.fsffrance.org). Running the same code side-by-side vs the T5, I get different results. I'll see if I can track down the difference, since they're both running the same base os. r~