From: Grant Likely <grant.likely@linaro.org>
To: Hanjun Guo <hanjun.guo@linaro.org>,
Catalin Marinas <catalin.marinas@arm.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Will Deacon <will.deacon@arm.com>,
Olof Johansson <olof@lixom.net>
Cc: Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
Arnd Bergmann <arnd@arndb.de>,
Mark Rutland <mark.rutland@arm.com>,
Graeme Gregory <graeme.gregory@linaro.org>,
Sudeep Holla <Sudeep.Holla@arm.com>, Jon Masters <jcm@redhat.com>,
Marc Zyngier <marc.zyngier@arm.com>,
Mark Brown <broonie@kernel.org>, Robert Richter <rric@kernel.org>,
Timur Tabi <timur@codeaurora.org>,
Ashwin Chaugule <ashwinc@codeaurora.org>,
suravee.suthikulpanit@amd.com, linux-acpi@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linaro-acpi@lists.linaro.org,
Al Stone <al.stone@linaro.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Tomasz Nowicki <tomasz.nowicki@linaro.org>,
Hanjun Guo <hanjun.guo@linaro.org>
Subject: Re: [PATCH v9 05/21] ARM64 / ACPI: Get RSDP and ACPI boot-time tables
Date: Fri, 06 Mar 2015 20:28:01 +0000 [thread overview]
Message-ID: <20150306202801.8BFE3C40AA9@trevor.secretlab.ca> (raw)
In-Reply-To: <1424853601-6675-6-git-send-email-hanjun.guo@linaro.org>
On Wed, 25 Feb 2015 16:39:45 +0800
, Hanjun Guo <hanjun.guo@linaro.org>
wrote:
> From: Al Stone <al.stone@linaro.org>
>
> As we want to get ACPI tables to parse and then use the information
> for system initialization, we should get the RSDP (Root System
> Description Pointer) first, it then locates Extended Root Description
> Table (XSDT) which contains all the 64-bit physical address that
> pointer to other boot-time tables.
>
> Introduce acpi.c and its related head file in this patch to provide
> fundamental needs of extern variables and functions for ACPI core,
> and then get boot-time tables as needed.
> - asm/acenv.h for arch specific ACPICA environments and
> implementation, It is needed unconditionally by ACPI core;
> - asm/acpi.h for arch specific variables and functions needed by
> ACPI driver core;
> - acpi.c for ARM64 related ACPI implementation for ACPI driver
> core;
>
> acpi_boot_table_init() is introduced to get RSDP and boot-time tables,
> it will be called in setup_arch() before paging_init(), so we should
> use eary_memremap() mechanism here to get the RSDP and all the table
> pointers.
>
> FADT Major.Minor version was introduced in ACPI 5.1, it is the same
> as ACPI version.
>
> In ACPI 5.1, some major gaps are fixed for ARM, such as updates in
> MADT table for GIC and SMP init, without those updates, we can not
> get the MPIDR for SMP init, and GICv2/3 related init information, so
> we can't boot arm64 ACPI properly with table versions predating 5.1.
>
> If firmware provides ACPI tables with ACPI version less than 5.1,
> OS has no way to retrieve the configuration data that is necessary
> to init SMP boot protocol and the GIC properly, so disable ACPI if
> we get an FADT table with version less that 5.1 when acpi_boot_table_init()
> called.
>
> CC: Catalin Marinas <catalin.marinas@arm.com>
> CC: Will Deacon <will.deacon@arm.com>
> CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
> Tested-by: Yijing Wang <wangyijing@huawei.com>
> Tested-by: Mark Langsdorf <mlangsdo@redhat.com>
> Tested-by: Jon Masters <jcm@redhat.com>
> Tested-by: Timur Tabi <timur@codeaurora.org>
> Tested-by: Robert Richter <rrichter@cavium.com>
> Acked-by: Robert Richter <rrichter@cavium.com>
> Signed-off-by: Al Stone <al.stone@linaro.org>
> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org>
> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Acked-by: Grant Likely <grant.likely@linaro.org>
> ---
> arch/arm64/include/asm/acenv.h | 18 ++++++++
> arch/arm64/include/asm/acpi.h | 45 ++++++++++++++++++
> arch/arm64/kernel/Makefile | 1 +
> arch/arm64/kernel/acpi.c | 101 +++++++++++++++++++++++++++++++++++++++++
> arch/arm64/kernel/setup.c | 5 ++
> 5 files changed, 170 insertions(+)
> create mode 100644 arch/arm64/include/asm/acenv.h
> create mode 100644 arch/arm64/include/asm/acpi.h
> create mode 100644 arch/arm64/kernel/acpi.c
>
> diff --git a/arch/arm64/include/asm/acenv.h b/arch/arm64/include/asm/acenv.h
> new file mode 100644
> index 0000000..b49166f
> --- /dev/null
> +++ b/arch/arm64/include/asm/acenv.h
> @@ -0,0 +1,18 @@
> +/*
> + * ARM64 specific ACPICA environments and implementation
> + *
> + * Copyright (C) 2014, Linaro Ltd.
> + * Author: Hanjun Guo <hanjun.guo@linaro.org>
> + * Author: Graeme Gregory <graeme.gregory@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#ifndef _ASM_ACENV_H
> +#define _ASM_ACENV_H
> +
> +/* It is required unconditionally by ACPI core, update it when needed. */
> +
> +#endif /* _ASM_ACENV_H */
> diff --git a/arch/arm64/include/asm/acpi.h b/arch/arm64/include/asm/acpi.h
> new file mode 100644
> index 0000000..8b837ab
> --- /dev/null
> +++ b/arch/arm64/include/asm/acpi.h
> @@ -0,0 +1,45 @@
> +/*
> + * Copyright (C) 2013-2014, Linaro Ltd.
> + * Author: Al Stone <al.stone@linaro.org>
> + * Author: Graeme Gregory <graeme.gregory@linaro.org>
> + * Author: Hanjun Guo <hanjun.guo@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation;
> + */
> +
> +#ifndef _ASM_ACPI_H
> +#define _ASM_ACPI_H
> +
> +/* Basic configuration for ACPI */
> +#ifdef CONFIG_ACPI
> +#define acpi_strict 1 /* No out-of-spec workarounds on ARM64 */
> +extern int acpi_disabled;
> +extern int acpi_noirq;
> +extern int acpi_pci_disabled;
> +
> +static inline void disable_acpi(void)
> +{
> + acpi_disabled = 1;
> + acpi_pci_disabled = 1;
> + acpi_noirq = 1;
> +}
> +
> +/*
> + * It's used from ACPI core in kdump to boot UP system with SMP kernel,
> + * with this check the ACPI core will not override the CPU index
> + * obtained from GICC with 0 and not print some error message as well.
> + * Since MADT must provide at least one GICC structure for GIC
> + * initialization, CPU will be always available in MADT on ARM64.
> + */
> +static inline bool acpi_has_cpu_in_madt(void)
> +{
> + return true;
> +}
> +
> +static inline void arch_fix_phys_package_id(int num, u32 slot) { }
> +
> +#endif /* CONFIG_ACPI */
> +
> +#endif /*_ASM_ACPI_H*/
> diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
> index bef04af..218eb7e 100644
> --- a/arch/arm64/kernel/Makefile
> +++ b/arch/arm64/kernel/Makefile
> @@ -34,6 +34,7 @@ arm64-obj-$(CONFIG_KGDB) += kgdb.o
> arm64-obj-$(CONFIG_EFI) += efi.o efi-stub.o efi-entry.o
> arm64-obj-$(CONFIG_PCI) += pci.o
> arm64-obj-$(CONFIG_ARMV8_DEPRECATED) += armv8_deprecated.o
> +arm64-obj-$(CONFIG_ACPI) += acpi.o
>
> obj-y += $(arm64-obj-y) vdso/
> obj-m += $(arm64-obj-m)
> diff --git a/arch/arm64/kernel/acpi.c b/arch/arm64/kernel/acpi.c
> new file mode 100644
> index 0000000..f052e7a
> --- /dev/null
> +++ b/arch/arm64/kernel/acpi.c
> @@ -0,0 +1,101 @@
> +/*
> + * ARM64 Specific Low-Level ACPI Boot Support
> + *
> + * Copyright (C) 2013-2014, Linaro Ltd.
> + * Author: Al Stone <al.stone@linaro.org>
> + * Author: Graeme Gregory <graeme.gregory@linaro.org>
> + * Author: Hanjun Guo <hanjun.guo@linaro.org>
> + * Author: Tomasz Nowicki <tomasz.nowicki@linaro.org>
> + * Author: Naresh Bhat <naresh.bhat@linaro.org>
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +
> +#define pr_fmt(fmt) "ACPI: " fmt
> +
> +#include <linux/acpi.h>
> +#include <linux/bootmem.h>
> +#include <linux/cpumask.h>
> +#include <linux/init.h>
> +#include <linux/irq.h>
> +#include <linux/irqdomain.h>
> +#include <linux/memblock.h>
> +#include <linux/smp.h>
> +
> +int acpi_noirq; /* skip ACPI IRQ initialization */
> +int acpi_disabled;
> +EXPORT_SYMBOL(acpi_disabled);
> +
> +int acpi_pci_disabled; /* skip ACPI PCI scan and IRQ initialization */
> +EXPORT_SYMBOL(acpi_pci_disabled);
> +
> +/*
> + * __acpi_map_table() will be called before page_init(), so early_ioremap()
> + * or early_memremap() should be called here to for ACPI table mapping.
> + */
> +char *__init __acpi_map_table(unsigned long phys, unsigned long size)
> +{
> + if (!phys || !size)
> + return NULL;
> +
> + return early_memremap(phys, size);
> +}
> +
> +void __init __acpi_unmap_table(char *map, unsigned long size)
> +{
> + if (!map || !size)
> + return;
> +
> + early_memunmap(map, size);
> +}
> +
> +static int __init acpi_parse_fadt(struct acpi_table_header *table)
> +{
> + struct acpi_table_fadt *fadt = (struct acpi_table_fadt *)table;
> +
> + /*
> + * Revision in table header is the FADT Major revision, and there
> + * is a minor revision of FADT which was introduced by ACPI 5.1,
> + * we only deal with ACPI 5.1 or newer revision to get GIC and SMP
> + * boot protocol configuration data, or we will disable ACPI.
> + */
> + if (table->revision > 5 ||
> + (table->revision == 5 && fadt->minor_revision >= 1))
> + return 0;
> +
> + pr_warn("Unsupported FADT revision %d.%d, should be 5.1+, will disable ACPI\n",
> + table->revision, fadt->minor_revision);
> + disable_acpi();
> +
> + return -EINVAL;
> +}
> +
> +/*
> + * acpi_boot_table_init() called from setup_arch(), always.
> + * 1. find RSDP and get its address, and then find XSDT
> + * 2. extract all tables and checksums them all
> + * 3. check ACPI FADT revision
> + *
> + * We can parse ACPI boot-time tables such as MADT after
> + * this function is called.
> + */
> +void __init acpi_boot_table_init(void)
> +{
> + /* If acpi_disabled, bail out */
> + if (acpi_disabled)
> + return;
> +
> + /* Initialize the ACPI boot-time table parser. */
> + if (acpi_table_init()) {
> + disable_acpi();
> + return;
> + }
> +
> + if (acpi_table_parse(ACPI_SIG_FADT, acpi_parse_fadt)) {
> + /* disable ACPI if no FADT is found */
> + disable_acpi();
> + pr_err("Can't find FADT\n");
> + }
> +}
> diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
> index e8420f6..4f1a014 100644
> --- a/arch/arm64/kernel/setup.c
> +++ b/arch/arm64/kernel/setup.c
> @@ -17,6 +17,7 @@
> * along with this program. If not, see <http://www.gnu.org/licenses/>.
> */
>
> +#include <linux/acpi.h>
> #include <linux/export.h>
> #include <linux/kernel.h>
> #include <linux/stddef.h>
> @@ -46,6 +47,7 @@
> #include <linux/efi.h>
> #include <linux/personality.h>
>
> +#include <asm/acpi.h>
> #include <asm/fixmap.h>
> #include <asm/cpu.h>
> #include <asm/cputype.h>
> @@ -380,6 +382,9 @@ void __init setup_arch(char **cmdline_p)
> efi_init();
> arm64_memblock_init();
>
> + /* Parse the ACPI tables for possible boot-time configuration */
> + acpi_boot_table_init();
> +
> paging_init();
> request_standard_resources();
>
> --
> 1.9.1
>
next prev parent reply other threads:[~2015-03-06 20:28 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-25 8:39 [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1 Hanjun Guo
2015-02-25 8:39 ` [PATCH v9 01/21] ACPI / table: Use pr_debug() instead of pr_info() for MADT table scanning Hanjun Guo
2015-03-04 22:33 ` Rafael J. Wysocki
2015-03-05 17:55 ` Olof Johansson
2015-03-06 20:17 ` Grant Likely
2015-03-06 20:31 ` Joe Perches
2015-03-10 2:35 ` Hanjun Guo
2015-02-25 8:39 ` [PATCH v9 02/21] ACPI / processor: Introduce phys_cpuid_t for CPU hardware ID Hanjun Guo
2015-03-04 22:29 ` Rafael J. Wysocki
2015-03-05 7:44 ` Hanjun Guo
2015-03-05 13:23 ` Rafael J. Wysocki
2015-03-06 6:48 ` Hanjun Guo
2015-03-06 20:19 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 03/21] ACPI: add arm64 to the platforms that use ioremap Hanjun Guo
2015-03-04 22:33 ` Rafael J. Wysocki
2015-03-06 20:20 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 04/21] ARM64: allow late use of early_ioremap Hanjun Guo
2015-03-06 20:24 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 05/21] ARM64 / ACPI: Get RSDP and ACPI boot-time tables Hanjun Guo
2015-03-05 18:10 ` Olof Johansson
2015-03-05 18:51 ` Lorenzo Pieralisi
2015-03-10 8:01 ` Hanjun Guo
2015-03-10 9:32 ` Lorenzo Pieralisi
2015-03-10 11:19 ` Leif Lindholm
2015-03-10 11:36 ` Hanjun Guo
2015-03-06 20:28 ` Grant Likely [this message]
2015-02-25 8:39 ` [PATCH v9 06/21] ACPI: fix acpi_os_ioremap for arm64 Hanjun Guo
2015-03-04 22:36 ` Rafael J. Wysocki
2015-03-06 20:30 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 07/21] ACPI / sleep: Introduce arm64 specific acpi_sleep.c Hanjun Guo
2015-03-04 22:38 ` Rafael J. Wysocki
2015-03-04 22:49 ` G Gregory
2015-03-04 23:25 ` Rafael J. Wysocki
2015-03-05 0:16 ` Rafael J. Wysocki
2015-03-06 12:36 ` Lorenzo Pieralisi
2015-03-06 20:34 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 08/21] ARM64 / ACPI: Introduce PCI stub functions for ACPI Hanjun Guo
2015-03-06 18:31 ` Lorenzo Pieralisi
2015-03-10 9:21 ` Hanjun Guo
2015-03-06 20:36 ` Grant Likely
2015-03-09 15:01 ` Liviu Dudau
2015-03-10 9:34 ` Hanjun Guo
2015-02-25 8:39 ` [PATCH v9 09/21] ARM64 / ACPI: Introduce early_param "acpi=" to enable/disable ACPI Hanjun Guo
2015-03-05 18:11 ` Olof Johansson
2015-03-06 20:37 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 10/21] ARM64 / ACPI: If we chose to boot from acpi then disable FDT Hanjun Guo
2015-03-05 18:12 ` Olof Johansson
2015-03-06 20:38 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 11/21] ARM64 / ACPI: Get PSCI flags in FADT for PSCI init Hanjun Guo
2015-03-05 18:19 ` Olof Johansson
2015-03-06 20:40 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 12/21] ACPI / table: Print GIC information when MADT is parsed Hanjun Guo
2015-03-04 22:40 ` Rafael J. Wysocki
2015-03-06 18:06 ` Lorenzo Pieralisi
2015-03-06 20:40 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 13/21] ARM64 / ACPI: Parse MADT for SMP initialization Hanjun Guo
2015-03-05 18:49 ` Olof Johansson
2015-03-10 11:33 ` Hanjun Guo
2015-03-07 22:49 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 14/21] ACPI / processor: Make it possible to get CPU hardware ID via GICC Hanjun Guo
2015-03-04 22:46 ` Rafael J. Wysocki
2015-03-05 8:03 ` Hanjun Guo
2015-03-05 11:27 ` Catalin Marinas
2015-03-05 13:13 ` Rafael J. Wysocki
2015-03-05 15:19 ` Catalin Marinas
2015-03-06 6:51 ` Hanjun Guo
2015-03-07 22:52 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 15/21] ARM64 / ACPI: Introduce ACPI_IRQ_MODEL_GIC and register device's gsi Hanjun Guo
2015-03-04 22:47 ` Rafael J. Wysocki
2015-03-07 23:05 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 16/21] irqchip: Add GICv2 specific ACPI boot support Hanjun Guo
2015-03-04 22:50 ` Rafael J. Wysocki
2015-03-05 9:06 ` Hanjun Guo
2015-03-05 11:53 ` Catalin Marinas
2015-03-06 0:42 ` Rafael J. Wysocki
2015-03-05 8:21 ` Hanjun Guo
2015-03-07 23:14 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 17/21] clocksource / arch_timer: Parse GTDT to initialize arch timer Hanjun Guo
2015-03-07 23:16 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 18/21] ARM64 / ACPI: Select ACPI_REDUCED_HARDWARE_ONLY if ACPI is enabled on ARM64 Hanjun Guo
2015-03-06 17:47 ` Lorenzo Pieralisi
2015-03-10 12:23 ` Hanjun Guo
2015-03-10 14:16 ` Lorenzo Pieralisi
2015-03-07 23:16 ` Grant Likely
2015-02-25 8:39 ` [PATCH v9 19/21] ARM64 / ACPI: Enable ARM64 in Kconfig Hanjun Guo
2015-03-04 22:52 ` Rafael J. Wysocki
2015-03-07 23:17 ` Grant Likely
2015-02-25 8:40 ` [PATCH v9 20/21] Documentation: ACPI for ARM64 Hanjun Guo
2015-02-27 10:53 ` Shannon Zhao
2015-02-27 11:13 ` Shannon Zhao
2015-02-27 11:20 ` Shannon Zhao
2015-02-25 8:40 ` [PATCH v9 21/21] ARM64 / ACPI: additions of ACPI documentation for arm64 Hanjun Guo
2015-02-27 11:22 ` Shannon Zhao
2015-02-27 14:19 ` Hanjun Guo
2015-03-05 18:54 ` Olof Johansson
2015-02-27 3:20 ` [PATCH v9 00/21] Introduce ACPI for ARM64 based on ACPI 5.1 Timur Tabi
2015-02-27 8:37 ` Hanjun Guo
2015-02-27 10:51 ` Shannon Zhao
2015-02-27 8:50 ` Ard Biesheuvel
2015-02-27 10:36 ` Mark Rutland
2015-02-27 21:05 ` Timur Tabi
2015-03-04 23:18 ` Timur Tabi
2015-03-04 22:56 ` Rafael J. Wysocki
2015-03-05 7:03 ` Hanjun Guo
2015-03-05 18:57 ` Olof Johansson
2015-03-06 4:26 ` Hanjun Guo
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