Linaro-acpi December 2015

linaro-acpi@lists.linaro.org

26 participants
15 discussions

[PATCH 0/4 v2] Add tool to enable APEI tables test, other minor changes.

by Tomasz Nowicki

Patch set implement as follows: 1. Minor changes around existing tools - reorganize building process, - move common code to separate direction, - no functionality changes. 2. Add BFAPEI (Blob For APEI) tool which can create blobs for APEI testing. - see commit log for more details Changes for v2: - compilation regardless of whether APEI is used or not, - correct file name in comment headers, - move ACPI structures, defines, etc. to acpi.h headers, - suppress compiler warnings. Tomasz Nowicki (4): map, cab: Reorganize building process and tree hierarchy. bfapei: Add tool that can create blobs for APEI table testing. bfapei: Move generic ACPI structures to separated file, remove duplicated defines. Suppress compiler warnings, file comment headers cleanup. Makefile | 28 +- platforms/Makefile | 9 +- tools/bfapei/Makefile | 11 + tools/bfapei/bfapei.c | 271 +++++++++++++++++++ tools/bfapei/bfapei.h | 49 ++++ tools/cab/Makefile | 12 +- tools/cab/cab.c | 535 +------------------------------------- tools/cab/cab.h | 149 ----------- tools/common/Makefile | 4 + tools/common/build_aml.c | 455 ++++++++++++++++++++++++++++++++ tools/common/check_aml.c | 512 ++++++++++++++++++++++++++++++++++++ tools/common/include/acpi.h | 204 +++++++++++++++ tools/common/include/build_aml.h | 74 ++++++ tools/common/include/check_aml.h | 92 +++++++ tools/mab/Makefile | 13 +- tools/mab/mab.c | 437 +------------------------------ tools/mab/mab.h | 77 ------ 17 files changed, 1734 insertions(+), 1198 deletions(-) create mode 100644 tools/bfapei/Makefile create mode 100644 tools/bfapei/bfapei.c create mode 100644 tools/bfapei/bfapei.h create mode 100644 tools/common/Makefile create mode 100644 tools/common/build_aml.c create mode 100644 tools/common/check_aml.c create mode 100644 tools/common/include/acpi.h create mode 100644 tools/common/include/build_aml.h create mode 100644 tools/common/include/check_aml.h -- 1.7.9.5

7 years, 9 months

[PATCH V2 00/23] MMCONFIG refactoring and support for ARM64 PCI hostbridge init based on ACPI

by Tomasz Nowicki

>From the functionality point of view this series might be split into the following logic parts: 1. Make MMCONFIG code arch-agnostic which allows all architectures to collect PCI config regions and used when necessary. 2. Move non-arch specific bits to the core code. 3. Use MMCONFIG code and implement generic ACPI based PCI host controller driver. 4. Enable above driver on ARM64 Patches has been built on top of 4.4-rc4 and can be found here: git@github.com:semihalf-nowicki-tomasz/linux.git (pci-acpi-v2) NOTE, this patch set depends on Matthew's patches: http://www.spinics.net/lists/linux-pci/msg45950.html https://github.com/Vality/linux/tree/pci-fixes This has been tested on Cavium ThunderX 1 socket server and QEMU. Any help in reviewing and testing is very appreciated. v1 -> v2 - moved non-arch specific piece of code to dirver/acpi/ directory - fixed IO resource handling - introduced PCI config accessors quirks matching - moved ACPI_COMPANION_SET to generic code Liu Jiang (1): ACPI, PCI: Refine the way to handle translation_offset for ACPI resources Tomasz Nowicki (22): x86, pci: Reorder logic of pci_mmconfig_insert() function x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory pci, acpi, mcfg: Provide generic implementation of MCFG code initialization. x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication. x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver. XEN / PCI: Remove the dependence on arch x86 when PCI_MMCONFIG=y pci, acpi, mcfg: Provide default RAW ACPI PCI config space accessors. arm64, acpi: Use empty PCI config space accessors from mcfg.c file. pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not. x86, pci: Cleanup platform specific MCFG data using previously added ECAM hot_added flag. arm64, pci: Remove useless boot time IRQ assignment when booting with DT. pci, acpi: Move ACPI host bridge device companion assignment to core code. x86, ia64, pci: Remove ACPI companion device from platform specific data. pci, acpi: Provide generic way to assign bus domain number. x86, ia64, pci: Convert arches to use PCI_DOMAINS_GENERIC. x86, ia64: Include acpi_pci_{add|remove}_bus to the default pcibios_{add|remove}_bus implementation. acpi, mcfg: Implement two calls that might be used to inject/remove MCFG region. x86, acpi, pci: Use equivalent function introduced in previous patch. acpi, mcfg: Add default PCI config accessors implementation and initial support for related quirks. pci, acpi: Support for ACPI based PCI hostbridge init pci, acpi: Match PCI config space accessors against platfrom specific quirks. arm64, pci, acpi: Start using ACPI based PCI host bridge driver for ARM64. arch/arm64/Kconfig | 10 ++ arch/arm64/kernel/pci.c | 35 ------ arch/ia64/Kconfig | 3 + arch/ia64/include/asm/pci.h | 3 - arch/ia64/pci/pci.c | 53 +++----- arch/x86/Kconfig | 7 ++ arch/x86/include/asm/pci.h | 10 -- arch/x86/include/asm/pci_x86.h | 28 +---- arch/x86/pci/acpi.c | 43 ++----- arch/x86/pci/common.c | 10 -- arch/x86/pci/irq.c | 10 -- arch/x86/pci/mmconfig-shared.c | 250 ++++++-------------------------------- arch/x86/pci/mmconfig_32.c | 11 +- arch/x86/pci/mmconfig_64.c | 67 +--------- arch/x86/pci/numachip.c | 1 + drivers/acpi/Makefile | 1 + drivers/acpi/mcfg.c | 203 +++++++++++++++++++++++++++++++ drivers/acpi/pci_root.c | 5 +- drivers/acpi/resource.c | 12 +- drivers/pci/Kconfig | 10 ++ drivers/pci/Makefile | 5 + drivers/pci/ecam.c | 234 +++++++++++++++++++++++++++++++++++ drivers/pci/host/Kconfig | 6 + drivers/pci/host/Makefile | 1 + drivers/pci/host/pci-host-acpi.c | 138 +++++++++++++++++++++ drivers/pci/pci.c | 29 ++++- drivers/pci/probe.c | 5 + drivers/xen/pci.c | 7 +- include/asm-generic/vmlinux.lds.h | 7 ++ include/linux/acpi.h | 2 + include/linux/ecam.h | 61 ++++++++++ include/linux/pci-acpi.h | 17 +++ 32 files changed, 817 insertions(+), 467 deletions(-) create mode 100644 drivers/acpi/mcfg.c create mode 100644 drivers/pci/ecam.c create mode 100644 drivers/pci/host/pci-host-acpi.c create mode 100644 include/linux/ecam.h -- 1.9.1

8 years, 12 months

[RFC 0/5] console/acpi: add DBG2 and SPCR console configuration

by Leif Lindholm

Support for configuring bootconsole and console via the ACPI tables DBG2 (Debug Port Table 2) [1] and SPCR (Serial Port Console Redirection Table) [2], defined by Microsoft, has been discussed on and off over the years. [1] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639131(v=vs.85)… [2] https://msdn.microsoft.com/en-us/library/windows/hardware/dn639132(v=vs.85)… Licensing concerns have prevented this happening in the past, but as of 10 August 2015, these tables have both been released also under OWF 1.0 (http://www.openwebfoundation.org/legal/the-owf-1-0-agreements/owfa-1-0) which is think is noncontroversially GPL-compatible? This set is a first attempt at implementing this. Submitting as an RFC since the SPCR handling currently depends on the console driver being initialized after subsystem initcalls. Workaround to enable testing surrounding infrastructure in 5/5, _really_ not intended to be merged. (Suggestions for acceptable ways of working around this appreciated.) For testing the DBG2 stuff with pl011, you would need: - A patch to unbreak pl011 earlycon, like http://permalink.gmane.org/gmane.linux.ports.arm.kernel/433219 - A QEMU that generates DBG2 tables, like current HEAD with the addition of http://lists.nongnu.org/archive/html/qemu-devel/2015-09/msg01719.html SPCR support is included in QEMU's ARM mach-virt since 2.4 release. DBG2 support has an Intel copyright notice added to it since my starting point was Lv Zheng's 2012 DBGP/DBG2 set (although not much of the original remains - this is quite a cut-down version). Leif Lindholm (4): arm64: move acpi/dt decision earlier in boot process of/serial: move earlycon early_param handling to serial acpi/serial: add DBG2 earlycon support HACK: serial: move pl011 initcall to device_initcall Torez Smith (1): tty/console: use SPCR table to define console arch/arm64/kernel/acpi.c | 55 +++++---- drivers/acpi/Makefile | 1 + drivers/acpi/console.c | 260 +++++++++++++++++++++++++++++++++++++++ drivers/of/fdt.c | 13 +- drivers/tty/serial/amba-pl011.c | 2 +- drivers/tty/serial/earlycon.c | 18 ++- drivers/tty/serial/serial_core.c | 14 ++- include/linux/acpi.h | 13 ++ include/linux/of_fdt.h | 1 + include/linux/serial_core.h | 9 +- 10 files changed, 337 insertions(+), 49 deletions(-) create mode 100644 drivers/acpi/console.c -- 2.1.4

8 years, 12 months

[PATCH v2 0/2] acpi, apei: add BERT support

by fu.wei＠linaro.org

From: Fu Wei <fu.wei(a)linaro.org> ACPI/APEI is designed to verifiy/report H/W errors, like Corrected Error(CE) and Uncorrected Error(UC). It contains four tables: HEST, ERST, EINJ and BERT. The first three tables have been merged for a long time, but because of lacking BIOS support for BERT, the support for BERT is pending until now. Recently on ARM 64 platform it is has been supported. So here we come. The following log is a BERT record after system reboot because of hitting a fatal error. BERT: Obtained BERT iomem region <00000000fe801000-00000000fe802000> for BERT. [Hardware Error]: Error record from previous boot: [Hardware Error]: event severity: fatal [Hardware Error]: Error 0, type: fatal [Hardware Error]: section_type: memory error [Hardware Error]: physical_address: 0x00000000fe800000 [Hardware Error]: physical_address_mask: 0x0000000000000fff [Hardware Error]: card: 0 module: 1 bank: 0 device: 1 row: 1 column: 1 bit_pos Changelog: v2: Delete EXPORT_SYMBOL_GPL(bert_disable), because "bert_disable" is only used in bert.c for now. Do some code-style cleanups. v1: The first upstream version submitted in linux-acpi mailing list: http://www.spinics.net/lists/linux-acpi/msg57384.html Huang Ying (1): ACPI, APEI, Boot Error Record Table (BERT) support Tomasz Nowicki (1): acpi, apei, bert: Clear error status at the end of error handling Documentation/kernel-parameters.txt | 3 + drivers/acpi/apei/Makefile | 2 +- drivers/acpi/apei/bert.c | 165 ++++++++++++++++++++++++++++++++++++ include/acpi/apei.h | 1 + 4 files changed, 170 insertions(+), 1 deletion(-) create mode 100644 drivers/acpi/apei/bert.c -- 2.4.3

9 years

[PATCH v2 0/3] ACPI, clocksource: add GTDT and ARM memory-mapped timer support

by fu.wei＠linaro.org

From: Fu Wei <fu.wei(a)linaro.org> This patchset: (1)Introduce ACPI GTDT parser: drivers/acpi/gtdt.c Parse all kinds of timer in GTDT table of ACPI:arch timer, memory-mapped timer and SBSA Generic Watchdog timer. This driver can help to simplify all the relevant timer drivers, and separate all the ACPI GTDT knowledge from them. (2)Simplify ACPI code for arch timer in arm_arch_timer.c (3)Add memory-mapped timer support in arm_arch_timer.c The SBSA Generic Watchdog info parsing support have been tested with a upstreaming SBSA Generic Watchdog driver: https://lkml.org/lkml/2015/10/27/466 on the following platforms: (1)ARM Foundation v8 model (2)AMD Seattle platform ARM memory-mapped timer support of this patchset has been tested on the following platforms: (1)ARM Foundation v8 model Changelog: v2: Rebase to latest kernel version(4.4-rc3). Fix the bug about the config problem, use CONFIG_ACPI_GTDT instead of CONFIG_ACPI in arm_arch_timer.c v1: The first upstreaming version: https://lkml.org/lkml/2015/10/28/553 Fu Wei (3): ACPI: add GTDT table parse driver into ACPI driver clocksource: simplify ACPI code in arm_arch_timer.c clocksource: add memory-mapped timer support in arm_arch_timer.c drivers/acpi/Kconfig | 9 + drivers/acpi/Makefile | 1 + drivers/acpi/gtdt.c | 367 +++++++++++++++++++++++++++++++++++ drivers/clocksource/arm_arch_timer.c | 178 +++++++++++++---- include/clocksource/arm_arch_timer.h | 19 ++ include/linux/acpi.h | 17 ++ 6 files changed, 555 insertions(+), 36 deletions(-) create mode 100644 drivers/acpi/gtdt.c -- 2.5.0

9 years

[PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge init based on ACPI

by Tomasz Nowicki

>From the functionality point of view this series might be split into two logic parts: 1. Making MMCONFIG code arch-agnostic which allows all architectures to collect PCI config regions and used when necessary. 2. Using generic MMCONFIG code and introducing ACPI based PCI hostbridge initialization for ARM64 Patches has been built on top of: [Patch v7 0/7] Consolidate ACPI PCI root common code into ACPI core https://lkml.org/lkml/2015/10/14/31 Git branch can be found here: https://git.linaro.org/leg/acpi/acpi.git/shortlog/refs/heads/pci-acpi-upstr… This has been tested on Cavium ThunderX 1 socket server. Any help in reviewing and testing is very appreciated. Hanjun Guo (1): XEN / PCI: Remove the dependence on arch x86 when PCI_MMCONFIG=y Tomasz Nowicki (10): x86, pci: Reorder logic of pci_mmconfig_insert() function x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory pci, acpi, mcfg: Provide generic implementation of MCFG code initialization. x86, pci: mmconfig_{32,64}.c code refactoring - remove code duplication. x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver. pci, acpi, mcfg: Provide default RAW ACPI PCI config space accessors. pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not. x86, pci: Use previously added ECAM hot_added flag to remove ECAM regions. pci, acpi: Provide generic way to assign bus domain number. arm64, pci, acpi: Support for ACPI based PCI hostbridge init arch/arm64/Kconfig | 6 + arch/arm64/kernel/pci.c | 208 ++++++++++++++++++++++++++++++++-- arch/x86/Kconfig | 4 + arch/x86/include/asm/pci_x86.h | 28 +---- arch/x86/pci/acpi.c | 17 +-- arch/x86/pci/mmconfig-shared.c | 250 +++++++---------------------------------- arch/x86/pci/mmconfig_32.c | 11 +- arch/x86/pci/mmconfig_64.c | 67 +---------- arch/x86/pci/numachip.c | 1 + drivers/acpi/Makefile | 1 + drivers/acpi/mcfg.c | 104 +++++++++++++++++ drivers/acpi/pci_root.c | 2 +- drivers/pci/Kconfig | 10 ++ drivers/pci/Makefile | 5 + drivers/pci/ecam.c | 234 ++++++++++++++++++++++++++++++++++++++ drivers/pci/pci.c | 30 ++++- drivers/xen/pci.c | 7 +- include/linux/acpi.h | 2 + include/linux/ecam.h | 44 ++++++++ 19 files changed, 691 insertions(+), 340 deletions(-) create mode 100644 drivers/acpi/mcfg.c create mode 100644 drivers/pci/ecam.c create mode 100644 include/linux/ecam.h -- 1.9.1

9 years

Touching the initrd before paging_init

by Jon Masters

Hi Folks, Just a few notes that might be useful to someone else. I mentioned before that we'll want to see ACPI_INITRD_TABLE_OVERRIDE support on arm64 in due course for use during bringup of new systems. It is commonly used on x86 to provide handy updated ACPI tables via a prepended initrd cpio that is attached to the regular initrd image, which is infinitely better than respinning firmware each time you want to provide updated tables (yes yes, we all know the "devicetree" directive in GRUB does this with DT and that's great and wonderful). I know that someone is working on it, but I had a need for an interim solution over the weekend for some hardware I am bringing up here. The problem is that there's no mapping for the pages containing the ramdisk data prior to paging_init. x86 does a bit of hoop jumping (and I think they have certain assumptions about linear mapping too) and splits the initrd setup into a couple of different phases, which we may well need to do also if we want to be able to call something like: #if defined(CONFIG_ACPI) && defined(CONFIG_BLK_DEV_INITRD) acpi_initrd_override((void *)initrd_start, initrd_end - initrd_start); #endif prior to acpi_boot_table_init in arch/arm64/kernel/setup.c. That routine will correctly map memory for data it copies out of the cpio, but it assumes that the initrd is already mapped. For the very nasty hack I want over the weekend, I added some extra fixmaps and then do an early_memremap on the physical address of first page of the initrd (the cpio is tiny, and is always prepended and this is very nasty). Viz: [ 0.000000] JCM: using fixmap for first page of ramdisk... [ 0.000000] JCM: first physical page of ramdisk: [mem REDACTED] [ 0.000000] JCM: first virtual page of ramdisk: [mem REDACTED] [ 0.000000] XXXX ACPI table found in initrd [kernel/firmware/acpi/xxxx.aml][0xxxx] [ 0.000000] XXXX ACPI table found in initrd [kernel/firmware/acpi/xxxx.aml][0xxx] [ 0.000000] XXXX ACPI table found in initrd [kernel/firmware/acpi/xxxx.aml][0xxxx] So maybe I'll get what I want working, but a head's up to whoever from Linaro ends up looking into the broader implementation that I think you'll need to rework initrd mapping as part of that. Unless of course I'm missing something. Which is more than possible. Jon.

9 years

[PATCH v4] acpi, apei, arm64: APEI initial support for aarch64.

by fu.wei＠linaro.org

From: Tomasz Nowicki <tomasz.nowicki(a)linaro.org> This commit provides APEI arch-specific bits for aarch64 Meanwhile, add a new subfunction "hest_ia_init" for "acpi_disable_cmcff" which is used by IA-32 Architecture Corrected Machine Check (CMC). Signed-off-by: Tomasz Nowicki <tomasz.nowicki(a)linaro.org> Tested-by: Jonathan (Zhixiong) Zhang <zjzhang(a)codeaurora.org> Signed-off-by: Fu Wei <fu.wei(a)linaro.org> --- Changelog: v4: Rebase to latest kernel version(4.4-rc4). Move arch_apei_flush_tlb_one into header file as a inline function Add a new subfunction "hest_ia_init" for "acpi_disable_cmcff". v3: https://lkml.org/lkml/2015/12/3/521 Remove "acpi_disable_cmcff" from arm64 code, and wrap it in hest.c by "#if defined(__i386__) || defined(__x86_64__)" v2: https://lkml.org/lkml/2015/12/2/432 Rebase to latest kernel version(4.4-rc3). Move arch_apei_flush_tlb_one() to arch/arm64/kernel/acpi.c v1: https://lkml.org/lkml/2015/8/14/199 Move arch_apei_flush_tlb_one() to arch/arm64/include/asm/apci.h. Delete arch/arm64/kernel/apei.c. Add "#ifdef CONFIG_ACPI_APEI" for "acpi_disable_cmcff". arch/arm64/Kconfig | 1 + arch/arm64/include/asm/acpi.h | 5 +++++ drivers/acpi/apei/hest.c | 19 ++++++++++++++++--- 3 files changed, 22 insertions(+), 3 deletions(-) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 871f217..58c8992 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -3,6 +3,7 @@ config ARM64 select ACPI_CCA_REQUIRED if ACPI select ACPI_GENERIC_GSI if ACPI select ACPI_REDUCED_HARDWARE_ONLY if ACPI + select HAVE_ACPI_APEI if ACPI select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_GCOV_PROFILE_ALL diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h index caafd63..31d3d9a 100644 --- a/arch/arm64/include/asm/acpi.h +++ b/arch/arm64/include/asm/acpi.h @@ -17,6 +17,7 @@ #include <asm/cputype.h> #include <asm/smp_plat.h> +#include <asm/tlbflush.h> /* Macros for consistency checks of the GICC subtable of MADT */ #define ACPI_MADT_GICC_LENGTH \ @@ -94,6 +95,10 @@ static inline const char *acpi_get_enable_method(int cpu) #ifdef CONFIG_ACPI_APEI pgprot_t arch_apei_get_mem_attribute(phys_addr_t addr); +static inline void arch_apei_flush_tlb_one(unsigned long addr) +{ + flush_tlb_kernel_range(addr, addr + PAGE_SIZE); +} #endif #endif /*_ASM_ACPI_H*/ diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c index 20b3fcf..715c58b 100644 --- a/drivers/acpi/apei/hest.c +++ b/drivers/acpi/apei/hest.c @@ -117,15 +117,27 @@ int apei_hest_parse(apei_hest_func_t func, void *data) } EXPORT_SYMBOL_GPL(apei_hest_parse); +#if defined(__i386__) || defined(__x86_64__) /* * Check if firmware advertises firmware first mode. We need FF bit to be set * along with a set of MC banks which work in FF mode. */ static int __init hest_parse_cmc(struct acpi_hest_header *hest_hdr, void *data) { - return arch_apei_enable_cmcff(hest_hdr, data); + if (!acpi_disable_cmcff) + return !arch_apei_enable_cmcff(hest_hdr, data); + + return 0; } +static inline int __init hest_ia_init(void) +{ + return apei_hest_parse(hest_parse_cmc, NULL); +} +#else +static inline int __init hest_ia_init(void) { return 0; } +#endif + struct ghes_arr { struct platform_device **ghes_devs; unsigned int count; @@ -232,8 +244,9 @@ void __init acpi_hest_init(void) goto err; } - if (!acpi_disable_cmcff) - apei_hest_parse(hest_parse_cmc, NULL); + rc = hest_ia_init(); + if (rc) + goto err; if (!ghes_disable) { rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count); -- 2.5.0

9 years

[RFC PATCH 0/2] PCI/ACPI: HiSi: Add ACPI support for Hip05 PCIe Host Bridge Controller

by Gabriele Paoloni

This patchset is based on Nowicki patchset: [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge init based on ACPI This patchset: 1) adds ACPI support for non ECAM PCI Host Bridge Controllers 2) adds ACPI support for Hip05 PCIe Host Bridge Controller Gabriele Paoloni (1): PCI/ACPI: Add ACPI support for non ECAM Host Bridge Controllers Gabriele Paoloni (1): PCI/ACPI: HiSi: Add ACPI support for HiSi PCIe Host Bridge arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/pci.c | 42 ++++++++ arch/arm64/kernel/pci_acpi_hisi.c | 198 ++++++++++++++++++++++++++++++++++++++ arch/arm64/kernel/pci_quirks.h | 24 +++++ drivers/acpi/pci_root.c | 4 + include/acpi/acpi_drivers.h | 6 ++ 6 files changed, 275 insertions(+) create mode 100644 arch/arm64/kernel/pci_acpi_hisi.c create mode 100644 arch/arm64/kernel/pci_quirks.h -- 1.9.1

9 years, 1 month

ACPI_INITRD_TABLE_OVERRIDE

by Jon Masters

Hi Folks, A quick note that I'm poking at a test kernel with ACPI_INITRD_TABLE_OVERRIDE support. I don't condone this for production kernels, but for testing fixes to DSDT's and SSDT's it can be very useful to insert updated tables into the initrd (this is commonplace on x86 during development). If someone already poked at this, let me know if you plan to post something upstream, etc. Jon.

9 years, 1 month

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Linaro-acpi December 2015