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Message-ID: <81C3A93C17462B4BBD7E272753C1057923B924C92D@EXDCVYMBSTM005.EQ1STM.local> Date: Tue, 14 Aug 2012 19:06:05 +0200 From: Sjur BRENDELAND <sjur.brandeland@...ricsson.com> To: Ohad Ben-Cohen <ohad@...ery.com> Cc: Linus Walleij <linus.walleij@...aro.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, Sjur Brændeland <sjurbren@...il.com> Subject: Remoteproc: Translating between host and device addresses. Hi Ohad, I have one question related to address translation between device address and host-physical address referencing the data-buffer transported in the virtio-rings. The address used in the virtio-ring is the host-physical-address, but the mapping between device-address and host-physical-address is not necessarily known by the device. In my case. One way for the device to figure out the translation between host-physical and device-address is to peek into some CarveOut resource entry and compute this translation. Because a CarveOut resource entry contains both the host-physical-address and the device address for the same memory location. But this feels like a workaround, shouldn't we make a more explicit way of communicating this mapping between host-physical and device addresses? Regards, Sjur -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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