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[81.2.115.148]) by smtp.gmail.com with ESMTPSA id o14sm20756504wmh.22.2020.03.30.06.36.51 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 30 Mar 2020 06:36:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:subject:date:message-id:in-reply-to:references:mime-version :content-transfer-encoding; bh=WTqWyO7pGTPXb6HXG/SCIMQhmD5yDN8g6Rdw1sDZPts=; b=w6FmxZwXaVZA1naDD9FOHNSgnAJ1xKhvMqCvmBiEeqdl9VYDDKW/qdzVHwHvuOQujt CXw5XGlKmFTv6tzlkOasDJYrZjnXgLHftvQE7BGL5WNRP0fu+ZQxP8ZSi7Jh2HlRG669 2yxeuUd2rFGm9qBu2IVAI3D8i3iIUCz28rs6IrW0tjhtC3Y7eQDy4NuivpjCePBbK8rc qr2mAsw9ha1o7tCDjyAZ97l5bIZqyieAwAZp0tlGL2gx8NdtjOc+sCzqNTT0K5/CtlVs SrfBIpuUO8EpbYz1unSPQPjjMut3TGrcuYYrG90HurU6QmL+l6WnpXPWZ3c4JaqcOeXD MI1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=WTqWyO7pGTPXb6HXG/SCIMQhmD5yDN8g6Rdw1sDZPts=; b=HkmeVKaBLIAzf9J0IbMMsSAnPcwQnyNanKOMeEWENNs5Zh5biYPsYaztIzRv4Gs/Dw g7R1waYdTbbCnf0Su3Byrznk2QN33wMW+oz6xLkoVFFRp1SfR2ZDkjMMd8Vb/cHZxZAC lVLhPCnTop3gsmiO/E3zw5LgOwDRC02ab3k5sFlxQz1uZxBhyM4habEgemyzeOlnOQTo rNNfMydOggaJu56xDx31VWmlUoN/ljN7rPQIp5aljDe2bWisWQacj1aKH15gFWPdPnCL PMI6+0Shau7UuUCoKVvtekdqCeFQFHjX1FVOEGfXfhYpTWbMVacG+ctixbTnqXHhp03D 4uEw== X-Gm-Message-State: ANhLgQ3BeYFAheNe8E+ZajmKMQ/lNZ1XSai2DEbwDIthuzRMwmrhIpTs lTiUFzdH92w2f4DoDBdbdYwjEbXC0tds/g== X-Google-Smtp-Source: ADFU+vsTsaFXtoOMrzH4di9IwSjRVUIp0y3IbY/TrXOcGeMJumGPhFH+lVppGjFl23LpAjaZtc1u+Q== X-Received: by 2002:a7b:c40b:: with SMTP id k11mr1686190wmi.157.1585575412614; Mon, 30 Mar 2020 06:36:52 -0700 (PDT) From: Peter Maydell To: qemu-devel@nongnu.org Subject: [PULL 2/6] hw/misc/allwinner-h3-dramc: enforce 64-bit multiply when calculating row mirror address Date: Mon, 30 Mar 2020 14:36:44 +0100 Message-Id: <20200330133648.22297-3-peter.maydell@linaro.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200330133648.22297-1-peter.maydell@linaro.org> References: <20200330133648.22297-1-peter.maydell@linaro.org> MIME-Version: 1.0 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::336 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: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" From: Niek Linnenbank The allwinner_h3_dramc_map_rows function simulates row addressing behavior when bootloader software attempts to detect the amount of available SDRAM. Currently the line that calculates the 64-bit address of the mirrored row uses a signed 32-bit multiply operation that in theory could result in the upper 32-bit be all 1s. This commit ensures that the row mirror address is calculated using only 64-bit operations. Reported-by: Peter Maydell Signed-off-by: Niek Linnenbank Message-id: 20200323192944.5967-1-nieklinnenbank@gmail.com Reviewed-by: Peter Maydell Signed-off-by: Peter Maydell --- hw/misc/allwinner-h3-dramc.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/misc/allwinner-h3-dramc.c b/hw/misc/allwinner-h3-dramc.c index 2b5260260e7..1d37cf422cd 100644 --- a/hw/misc/allwinner-h3-dramc.c +++ b/hw/misc/allwinner-h3-dramc.c @@ -85,8 +85,8 @@ static void allwinner_h3_dramc_map_rows(AwH3DramCtlState = *s, uint8_t row_bits, =20 } else if (row_bits_actual) { /* Row bits not matching ram_size, install the rows mirror */ - hwaddr row_mirror =3D s->ram_addr + ((1 << (row_bits_actual + - bank_bits)) * page_size); + hwaddr row_mirror =3D s->ram_addr + ((1ULL << (row_bits_actual + + bank_bits)) * page_si= ze); =20 memory_region_set_enabled(&s->row_mirror_alias, true); memory_region_set_address(&s->row_mirror_alias, row_mirror); --=20 2.20.1