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[81.40.121.39]) by smtp.gmail.com with ESMTPSA id z17sm22634798wro.1.2021.04.19.02.43.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 19 Apr 2021 02:43:31 -0700 (PDT) From: =?utf-8?q?Philippe_Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH v2 0/7] hw/misc: Add memory_region_add_subregion_aliased() helper [pflash part] Date: Mon, 19 Apr 2021 11:43:22 +0200 Message-Id: <20210419094329.1402767-1-f4bug@amsat.org> X-Mailer: git-send-email 2.26.3 MIME-Version: 1.0 Received-SPF: pass client-ip=2a00:1450:4864:20::32a; envelope-from=philippe.mathieu.daude@gmail.com; helo=mail-wm1-x32a.google.com X-Spam_score_int: -14 X-Spam_score: -1.5 X-Spam_bar: - X-Spam_report: (-1.5 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.249, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: Stephen Checkoway , qemu-block@nongnu.org, Richard Henderson , =?utf-8?q?Philippe_Mathie?= =?utf-8?q?u-Daud=C3=A9?= , David Edmondson , qemu-arm@nongnu.org Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hi, This series introduce the memory_region_add_subregion_aliased() helper which basically create a device which maps a subregion multiple times. Since v1: - Split series in 2, keeping the I/O regions (showed with the q800 machine) part for 2nd part - Added R-b tags Examples are easier, so having a subregion aliased every @span_size then mapped onto a container at an offset, you get something like: ^-----------^ | | | | | +-------+ | +---------+ <--+ | | +---------+ | | | | | | | | +-----------> | alias#3 | | | | | | | | | | | +---------+ | | | | +---------+ | | | | | | | | | | +-------> | alias#2 | | | | | | | | |region | container | | | +---------+ | size | | | | +---------+ | | | | | | | | | | | | +----> | alias#1 | | | | | | | | | | | | | | | +---------+ <--+ | | | +-+---+--+--+ +---------+ | | | | | | | | |span | | | | subregion +-> | alias#0 | |size | offset | | | | | | | | +----> | +-------+ | +-----------+ +---------+ <--+ <--+ | | | | | | | | | | | | | | | | ^-----------^ I know it need more documentation and tests, but I prefer to send as draft RFC for early review before spending more time on it. Supersedes: <20210326002728.1069834-1-f4bug@amsat.org> Based-on: <20210325120921.858993-1-f4bug@amsat.org> https://www.mail-archive.com/qemu-devel@nongnu.org/msg795218.html Philippe Mathieu-Daudé (7): hw/misc: Add device to help managing aliased memory regions hw/arm/musicpal: Open-code pflash_cfi02_register() call hw/arm/musicpal: Map flash using memory_region_add_subregion_aliased() hw/arm/digic: Open-code pflash_cfi02_register() call hw/arm/digic: Map flash using memory_region_add_subregion_aliased() hw/block/pflash_cfi02: Remove pflash_setup_mappings() hw/block/pflash_cfi02: Simplify pflash_cfi02_register() prototype include/hw/block/flash.h | 1 - include/hw/misc/aliased_region.h | 87 ++++++++++++++++++++ hw/arm/digic_boards.c | 28 +++++-- hw/arm/musicpal.c | 29 +++++-- hw/arm/xilinx_zynq.c | 2 +- hw/block/pflash_cfi02.c | 36 +-------- hw/lm32/lm32_boards.c | 4 +- hw/misc/aliased_region.c | 132 +++++++++++++++++++++++++++++++ hw/ppc/ppc405_boards.c | 6 +- hw/sh4/r2d.c | 2 +- MAINTAINERS | 6 ++ hw/arm/Kconfig | 2 + hw/misc/Kconfig | 3 + hw/misc/meson.build | 1 + 14 files changed, 285 insertions(+), 54 deletions(-) create mode 100644 include/hw/misc/aliased_region.h create mode 100644 hw/misc/aliased_region.c