This patchset adds support for ACPI_TABLE_UPGRADE for ARM64 These patches help with: 1). During development of a platform, it is much easier to debug problems with tables if you can test replacement ones without having to respin the firmware. In the server world, you usually don't have the firmware source code, so to get it respun could be days-weeks even if you are working with the authors closely. We have practically used this feature on a number of platforms already and it will continue. 2). They empower (advanced) users and developers to work around problems that they find on platforms. Sure, we want firmware to always be fixed and working well, but it is better if folks have the tools. It's also required for parity with x86 functionality on servers as Redhat use that method in their tooling. The patchset refactors the code introduced by the patches by Lv Zheng [1], fixes access to the destination of new ACPI tables as suggested by Mark Rutland [2] and enables the feature for ARM64 It was first sent by Jon Masters [3] to linaro-acpi in December 2015 Tested on QEMU (arm64 and x86) and ThunderX Should be applied to next-20160519 v2: - add Acked-by: Lv Zheng <lv.zheng@xxxxxxxxx> - replace the original patch "ACPI: table upgrade: move early_initrd_acpi_init() to header file" with the patch "ACPI: table upgrade: refactor function definitions". This new patch is just the original one rewritten following the suggestion by Lv Zheng to use initrd_start, inird_end directly in acpi_table_initrd_init(). It simplifies things noticeably. - add Jon's explanations to the cover of the patchset and my explanations to "ACPI: ARM64: support for ACPI_TABLE_UPGRADE" - introduce ARCH_HAS_ACPI_TABLE_UPGRADE in a separate patch (Mark Rutland) - move arch-specific definition to an arch-specific header in a separate patch (Mark Rutland) v1: https://lkml.kernel.org/g/1463486765-31827-1-git-send-email-aleksey.makarov@xxxxxxxxxx [1] https://lkml.kernel.org/g/cover.1460340514.git.lv.zheng@xxxxxxxxx [2] https://lists.linaro.org/pipermail/linaro-acpi/2015-December/006101.html [3] https://lists.linaro.org/pipermail/linaro-acpi/2015-December/006099.html Aleksey Makarov (4): ACPI: table upgrade: use cacheable map for tables ACPI: table upgrade: refactor function definitions ACPI: table upgrade: move arch-specific symbol to asm/acpi.h ACPI: table upgrade: introduce ARCH_HAS_ACPI_TABLE_UPGRADE Jon Masters (1): ACPI: ARM64: support for ACPI_TABLE_UPGRADE arch/arm64/Kconfig | 1 + arch/arm64/include/asm/acpi.h | 2 ++ arch/arm64/kernel/setup.c | 6 ++++-- arch/x86/Kconfig | 1 + arch/x86/include/asm/acpi.h | 2 ++ arch/x86/kernel/setup.c | 9 +-------- drivers/acpi/Kconfig | 5 ++++- drivers/acpi/tables.c | 23 +++++++++-------------- include/linux/acpi.h | 8 ++++++-- 9 files changed, 30 insertions(+), 27 deletions(-) -- 2.8.2 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
