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[83.42.66.34]) by smtp.gmail.com with ESMTPSA id l19sm2908653wmj.12.2020.01.08.10.14.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 08 Jan 2020 10:14:32 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=kXtcRU+evWm4ZwyBxV8pmjYNaAs60PlKYV5qf3mHeDM=; b=fKyQkm5A5TyB9ooCiKZxDdbvZvj9jS4PZaBW78UD8jhasA98Gsa5ITpQWI9ZyJHJbf aXuNYG5l9kctqArIcOb5MY01pAoISbyNuEmGLRNeq8NAKvzfW92q/Ru/KCTBQhcs41pz 6gODm2CT2B19JcNhcCq4ZR7nSUgAA2mLauyZPLFMwKT5yor96iO0FfXX3sokAWKdihNy YPp7a9kuE+Iwmz2hFNCL67m8yWY770JxMsAlBgZmtPpOezwRJ+cCzGNX/S5Rtk8mwvK9 NWtEySznJIEAaLasNh/C3bweSBC2os8098vZTRmkkfcTR5ks4OGiia1SgrBmNoZSHUR7 QT0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-transfer-encoding; bh=kXtcRU+evWm4ZwyBxV8pmjYNaAs60PlKYV5qf3mHeDM=; b=I3I7fgg/ilRYBZ/ZhX2Ljkv7NQqiplnsD/KQINIE0Xqk5fecFvX0Lq2TE3aUPI2L8W CMaye+4pbaaPoE4ZMUuJe99XZfE2mVwJ0luaQcvu3KUFucLSDFymiWc4SEBkz2bglff6 otwVpZss4ckAjin7QJeyjmGSDnMNA4dh9FJ3S2AClm+0P8YduPltZtcdOVBZmYCkRis0 DlkX9Rxx+COhyrOFetT3nP49XXkOjLEvPh2j91mmuKX0nxtWw6kF+DHge6U4rLacgrjc C3pjCY1QGk8ydXe3uNqvASyj9jZqM4rYDs4R2KNRTewm80OdsOlyqh4//puSCrKAt3cY q3bg== X-Gm-Message-State: APjAAAVcP4PgFypWlFEa2d8T93fCABFuvDVXV/R8lA1R3LJbiV9IisKS gR7ABjF27XY5H660e8ElWywgfFxe X-Google-Smtp-Source: APXvYqz5t5Ltixp0Z6P5pMTAyu8pmhlZi4LMoD9ExYhvdEKeO6KNxXDRL/3FfSOd3vnZzT/Z1L9tHA== X-Received: by 2002:a5d:5403:: with SMTP id g3mr6102580wrv.302.1578507273222; Wed, 08 Jan 2020 10:14:33 -0800 (PST) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: Igor Mammedov , Helge Deller , qemu-devel@nongnu.org, Sven Schnelle Subject: [RFC PATCH 3/3] hw/hppa/machine: Warn when using more than 4095MB of RAM Date: Wed, 8 Jan 2020 19:14:25 +0100 Message-Id: <20200108181425.21485-4-f4bug@amsat.org> X-Mailer: git-send-email 2.21.1 In-Reply-To: <20200108181425.21485-1-f4bug@amsat.org> References: <20200108181425.21485-1-f4bug@amsat.org> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::441 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: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Richard Henderson Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) We use SeaBIOS as firmware, and pass the RAM size in a 32-bit wide register. When using 4GB of RAM, the register is truncated to 0, SeaBIOS is confused and halts the machine: $ qemu-system-hppa -m 4g -serial stdio SeaBIOS: Machine configured with too little memory (0 MB), minimum is 16 = MB. SeaBIOS wants SYSTEM HALT. Display a warning in case the user is not looking at the serial console. Signed-off-by: Philippe Mathieu-Daud=C3=A9 --- hw/hppa/machine.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/hw/hppa/machine.c b/hw/hppa/machine.c index d10c967d06..e74aafea2f 100644 --- a/hw/hppa/machine.c +++ b/hw/hppa/machine.c @@ -159,6 +159,10 @@ static void machine_hppa_init(MachineState *machine) exit(1); } g_free(firmware_filename); + if (machine->ram_size > 4095 * MiB) { + /* FIXME As we use 32-bit registers, 4GiB is truncated to 0 */ + warn_report("Firmware might misbehave with 4GB of RAM"); + } =20 rom_region =3D g_new(MemoryRegion, 1); memory_region_init_ram(rom_region, NULL, "firmware", --=20 2.21.1