Linaro-acpi February 2016

linaro-acpi@lists.linaro.org

29 participants
26 discussions

Fwd: [PATCH] IORT: Add in support for the SMMUv3 subtable

by Al Stone

Whups. I should have sent a copy of this to this list also... -------- Forwarded Message -------- Subject: [PATCH] IORT: Add in support for the SMMUv3 subtable Date: Wed, 24 Feb 2016 18:01:14 -0700 From: Al Stone <al.stone(a)linaro.org> To: devel(a)acpica.org CC: Al Stone <al.stone(a)linaro.org> The most recent version of the IORT specification adds in a definition for a subtable to describe SMMUv3 devices; there is already a subtable for SMMUv1/v2 devices. Add in the definition of the subtable, add in the code to compile it, and add in a template for it. Signed-off-by: Al Stone <al.stone(a)linaro.org> --- source/common/dmtbdump.c | 6 ++++++ source/common/dmtbinfo.c | 19 +++++++++++++++++++ source/compiler/dttable1.c | 17 +++++++++++++++-- source/compiler/dttemplate.h | 15 +++++++++++---- source/include/acdisasm.h | 1 + source/include/actbl2.h | 25 +++++++++++++++++++++++-- 6 files changed, 75 insertions(+), 8 deletions(-) diff --git a/source/common/dmtbdump.c b/source/common/dmtbdump.c index ce3b45b..bf09e58 100644 --- a/source/common/dmtbdump.c +++ b/source/common/dmtbdump.c @@ -1845,6 +1845,12 @@ AcpiDmDumpIort ( IortSmmu = ACPI_ADD_PTR (ACPI_IORT_SMMU, IortNode, NodeOffset); break; + case ACPI_IORT_NODE_SMMU_V3: + + InfoTable = AcpiDmTableInfoIort4; + Length = IortNode->Length - NodeOffset; + break; + default: AcpiOsPrintf ("\n**** Unknown IORT node type 0x%X\n", diff --git a/source/common/dmtbinfo.c b/source/common/dmtbinfo.c index be95f92..5edb8d4 100644 --- a/source/common/dmtbinfo.c +++ b/source/common/dmtbinfo.c @@ -242,6 +242,7 @@ #define ACPI_IORT1_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_NAMED_COMPONENT,f) #define ACPI_IORT2_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_ROOT_COMPLEX,f) #define ACPI_IORT3_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_SMMU,f) +#define ACPI_IORT4_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_SMMU_V3,f) #define ACPI_IORTA_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_MEMORY_ACCESS,f) #define ACPI_IORTH_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_NODE,f) #define ACPI_IORTM_OFFSET(f) (UINT16) ACPI_OFFSET (ACPI_IORT_ID_MAPPING,f) @@ -328,6 +329,7 @@ #define ACPI_GTDT0a_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_GTDT_TIMER_ENTRY,f,o) #define ACPI_GTDT1_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_GTDT_WATCHDOG,f,o) #define ACPI_IORT3_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_IORT_SMMU,f,o) +#define ACPI_IORT4_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_IORT_SMMU_V3,f,o) #define ACPI_IORTA_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_IORT_MEMORY_ACCESS,f,o) #define ACPI_IORTM_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_IORT_ID_MAPPING,f,o) #define ACPI_LPITH_FLAG_OFFSET(f,o) ACPI_FLAG_OFFSET (ACPI_LPIT_HEADER,f,o) @@ -1633,6 +1635,23 @@ ACPI_DMTABLE_INFO AcpiDmTableInfoIort3c[] = ACPI_DMT_TERMINATOR }; +/* 0x04: SMMUv3 */ + +ACPI_DMTABLE_INFO AcpiDmTableInfoIort4[] = +{ + {ACPI_DMT_UINT64, ACPI_IORT4_OFFSET (BaseAddress), "Base Address", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (Flags), "Flags (decoded below)", 0}, + {ACPI_DMT_FLAG0, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "COHACC Override", 0}, + {ACPI_DMT_FLAG1, ACPI_IORT4_FLAG_OFFSET (Flags, 0), "HTTU Override", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (Reserved), "Reserved", 0}, + {ACPI_DMT_UINT64, ACPI_IORT4_OFFSET (VatosAddress), "VATOS Address", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (Model), "Model", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (EventGsiv), "Event GSIV", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (PriGsiv), "PRI GSIV", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (GerrGsiv), "GERR GSIV", 0}, + {ACPI_DMT_UINT32, ACPI_IORT4_OFFSET (SyncGsiv), "Sync GSIV", 0}, + ACPI_DMT_TERMINATOR +}; /******************************************************************************* * diff --git a/source/compiler/dttable1.c b/source/compiler/dttable1.c index ada7fca..cacd9de 100644 --- a/source/compiler/dttable1.c +++ b/source/compiler/dttable1.c @@ -1315,8 +1315,8 @@ DtCompileIort ( DtInsertSubtable (ParentTable, Subtable); /* - * Using ACPI_SUB_PTR, We needn't define a seperate structure. Care - * should be taken to avoid accessing ACPI_TABLE_HADER fields. + * Using ACPI_SUB_PTR, We needn't define a separate structure. Care + * should be taken to avoid accessing ACPI_TABLE_HEADER fields. */ Iort = ACPI_SUB_PTR (ACPI_TABLE_IORT, Subtable->Buffer, sizeof (ACPI_TABLE_HEADER)); @@ -1547,6 +1547,19 @@ DtCompileIort ( IortSmmu->PmuInterruptCount = PmuIrptNumber; break; + case ACPI_IORT_NODE_SMMU_V3: + + Status = DtCompileTable (PFieldList, AcpiDmTableInfoIort4, + &Subtable, TRUE); + if (ACPI_FAILURE (Status)) + { + return (Status); + } + + DtInsertSubtable (ParentTable, Subtable); + NodeLength += Subtable->Length; + break; + default: DtFatal (ASL_MSG_UNKNOWN_SUBTABLE, SubtableStart, "IORT"); diff --git a/source/compiler/dttemplate.h b/source/compiler/dttemplate.h index f27a77a..71f0041 100644 --- a/source/compiler/dttemplate.h +++ b/source/compiler/dttemplate.h @@ -615,11 +615,11 @@ const unsigned char TemplateHpet[] = const unsigned char TemplateIort[] = { - 0x49,0x4F,0x52,0x54,0x0C,0x01,0x00,0x00, /* 00000000 "IORT...." */ - 0x00,0xBC,0x49,0x4E,0x54,0x45,0x4C,0x20, /* 00000008 "..INTEL " */ + 0x49,0x4F,0x52,0x54,0x48,0x01,0x00,0x00, /* 00000000 "IORTH..." */ + 0x00,0x02,0x49,0x4E,0x54,0x45,0x4C,0x20, /* 00000008 "..INTEL " */ 0x54,0x45,0x4D,0x50,0x4C,0x41,0x54,0x45, /* 00000010 "TEMPLATE" */ 0x00,0x00,0x00,0x00,0x49,0x4E,0x54,0x4C, /* 00000018 "....INTL" */ - 0x10,0x04,0x15,0x20,0x04,0x00,0x00,0x00, /* 00000020 "... ...." */ + 0x12,0x02,0x16,0x20,0x05,0x00,0x00,0x00, /* 00000020 "... ...." */ 0x34,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000028 "4......." */ 0x00,0x00,0x00,0x00,0x00,0x2C,0x00,0x00, /* 00000030 ".....,.." */ 0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00, /* 00000038 "........" */ @@ -648,7 +648,14 @@ const unsigned char TemplateIort[] = 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 000000F0 "........" */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 000000F8 "........" */ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000100 "........" */ - 0x00,0x00,0x00,0x00 /* 00000108 "...." */ + 0x00,0x00,0x00,0x00,0x04,0x3C,0x00,0x00, /* 00000108 ".....<.." */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000110 "........" */ + 0x3C,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000118 "<......." */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000120 "........" */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000128 "........" */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000130 "........" */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00, /* 00000138 "........" */ + 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 /* 00000140 "........" */ }; const unsigned char TemplateIvrs[] = diff --git a/source/include/acdisasm.h b/source/include/acdisasm.h index f949a8b..f962370 100644 --- a/source/include/acdisasm.h +++ b/source/include/acdisasm.h @@ -391,6 +391,7 @@ extern ACPI_DMTABLE_INFO AcpiDmTableInfoIort3[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIort3a[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIort3b[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIort3c[]; +extern ACPI_DMTABLE_INFO AcpiDmTableInfoIort4[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIortAcc[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIortHdr[]; extern ACPI_DMTABLE_INFO AcpiDmTableInfoIortMap[]; diff --git a/source/include/actbl2.h b/source/include/actbl2.h index 1cac3dc..8311e7f 100644 --- a/source/include/actbl2.h +++ b/source/include/actbl2.h @@ -834,7 +834,7 @@ typedef struct acpi_ibft_target * IORT - IO Remapping Table * * Conforms to "IO Remapping Table System Software on ARM Platforms", - * Document number: ARM DEN 0049A, 2015 + * Document number: ARM DEN 0049B, October 2015 * ******************************************************************************/ @@ -870,7 +870,8 @@ enum AcpiIortNodeType ACPI_IORT_NODE_ITS_GROUP = 0x00, ACPI_IORT_NODE_NAMED_COMPONENT = 0x01, ACPI_IORT_NODE_PCI_ROOT_COMPLEX = 0x02, - ACPI_IORT_NODE_SMMU = 0x03 + ACPI_IORT_NODE_SMMU = 0x03, + ACPI_IORT_NODE_SMMU_V3 = 0x04 }; @@ -979,6 +980,26 @@ typedef struct acpi_iort_smmu #define ACPI_IORT_SMMU_COHERENT_WALK (1<<1) +typedef struct acpi_iort_smmu_v3 +{ + UINT64 BaseAddress; /* SMMUv3 base address */ + UINT32 Flags; + UINT32 Reserved; + UINT64 VatosAddress; + UINT32 Model; /* O: generic SMMUv3 */ + UINT32 EventGsiv; + UINT32 PriGsiv; + UINT32 GerrGsiv; + UINT32 SyncGsiv; + +} ACPI_IORT_SMMU_V3; + +/* Masks for Flags field above */ + +#define ACPI_IORT_SMMU_V3_COHACC_OVERRIDE (1) +#define ACPI_IORT_SMMU_V3_HTTU_OVERRIDE (1<<1) + + /******************************************************************************* * * IVRS - I/O Virtualization Reporting Structure -- 2.5.0

8 years, 2 months

Re: [Linaro-acpi] [PATCH v3 2/5] ACPI: parse SPCR and enable matching console

by Itaru Kitayama

The updated topic-acpi-console branch kernel with Lorenzo's acpi parking protocol patch applied booted fine on Mustang with the new Beta F/W.

8 years, 2 months

[PATCH v3 0/6] acpi, clocksource, kvm: 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 (4)Add arm_arch_timer get ppi from DT and GTDT support for kvm in virt/kvm/arm/arch_timer.c Changelog: v3: Improve GTDT driver code: (1)improve pr_* by defining pr_fmt(fmt) (2)simplify gtdt_sbsa_gwdt_init (3)improve gtdt_arch_timer_data_init, if table is NULL, it will try to get GTDT table. Move enum ppi_nr to arm_arch_timer.h, and add enum spi_nr. Add arm_arch_timer get ppi from DT and GTDT support for kvm. v2: https://lkml.org/lkml/2015/12/2/10 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 (5): 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 clocksource: move some enums to arm_arch_timer.h kvm: arm64: Add ACPI support for virt arch timer Wei Huang (1): kvm: arm64: wrapping DT support for virt arch timer drivers/acpi/Kconfig | 9 + drivers/acpi/Makefile | 1 + drivers/acpi/gtdt.c | 375 +++++++++++++++++++++++++++++++++++ drivers/clocksource/Kconfig | 1 + drivers/clocksource/arm_arch_timer.c | 191 +++++++++++++----- include/clocksource/arm_arch_timer.h | 33 +++ include/linux/acpi.h | 17 ++ virt/kvm/arm/arch_timer.c | 57 ++++-- 8 files changed, 620 insertions(+), 64 deletions(-) create mode 100644 drivers/acpi/gtdt.c -- 2.5.0

8 years, 2 months

[PATCH v2 00/23] Full ACPI compliance testing for the FADT

by Al Stone

This constitutes a major rewrite and restructuring of the FADT tests for ACPI. There is now a compliance test for every field that we can test. Some we cannot test since any possible value in the field is also an allowed value. In some cases, the tests are an extension of existing tests -- for the PM blocks, SMI_CMD and the GPE blocks, for example. In the rest, these are new tests, and all of these are part of what used to be a much smaller test1. The original test2 and test3 are almost entirely intact since they did some solid testing of semantics across several related fields. The largest structural change is around reduced hardware mode. There is now a test specific to that mode verifying that all of the fields in the FADT that are to be ignored are set to zero. Further, tests that are irrelevant to reduced hardware mode are skipped when we have tables in that mode. Some of the patches are simply to enable compiling the FADT tests on non-x86 architectures; they were completely disabled previously. I did attempt to break up the patches into reasonable chunks but some of them still may have ended up fairly large. This has been tested on arm64 and x86-64, using arm64 and x86 ACPI tables. I am sure the testing has not been exhaustive; there are a *lot* of fields in the FADT. Changes for v2: -- Print out the SEALED_CASE flag (Colin Ian King) -- Relax the revision test a little (Alex Hung) -- Simplify/clarify testing of DSDT/X_DSDT fields (Alex Hung) -- New patch: add in safety checks for many of the fields that may not occur in older FADTs (spurred by comments from Alex Hung) -- New patch: update regression tests (Colin Ian King) -- Add in Acked-bys, but only if there were NO changes to the prior version of the patch (patches 4/23, 8/23, 10/23, 22-23/23 are the only ones without Acked-bys). Al Stone (23): FADT: enable compiling on non-x86 architectures FADT: non-x86 machines need an FADT but x86 can survive without one FADT: disable SCI_EN and RESET_REG tests when in reduced hardware mode FADT: add in code to log basic info about the various FADT flag fields Add in bit masks for FACS flags. FADT: move log info out of test2, will provide it elsewhere ACPI: Add hypervisor ID field to FADT. FADT: minor cleanup and initial compliance tests FADT: expand the compliance test for FIRMWARE_CTRL fields FADT: expand compliance checks for DSDT and X_DSDT fields FADT: add compliance tests for reserved fields, PM profile, reduced hardware FADT: restructure test sequence around reduced hardware mode FADT: expand compliance tests for the SMI_CMD field FADT: add compliance tests for the ACPI_ENABLE and ACPI_DISABLE fields FADT: add compliance tests for S4BIOS_REQ and PSTATE_CNT fields FADT: extend and add PM address block compliance tests FADT: enhance compliance tests for GPE blocks FADT: add compliance test for the CST_CNT field FADT: add in compliance tests for C2/C3 latency fields FADT: add in SLEEP_CONTROL_REG and SLEEP_STATUS_REG compliance tests FADT: remove no longer useful variables from test1 FADT: add safety checks for older versions of FADT FADT: update regression tests to incorporate new/changed tests .../arg-show-tests-0001/arg-show-tests-0001.log | 1 + .../arg-show-tests-full-0001.log | 21 +- src/acpi/fadt/fadt.c | 1796 +++++++++++++++++--- src/lib/include/fwts_acpi.h | 35 + 4 files changed, 1595 insertions(+), 258 deletions(-) -- 2.5.0

8 years, 2 months

[PATCH v13 0/4] Watchdog: introduce ARM SBSA watchdog driver

by fu.wei＠linaro.org

From: Fu Wei <fu.wei(a)linaro.org> This patchset: (1)Introduce Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt for FDT info of SBSA Generic Watchdog, and give two examples of adding SBSA Generic Watchdog device node into the dts files: foundation-v8.dts and amd-seattle-soc.dtsi. (2)Introduce ARM SBSA watchdog driver: a.Use linux kernel watchdog framework; b.Work with FDT on ARM64; c.Support getting timeout from parameter and FDT at the driver init stage. d.The driver works in two modes: (1) single stage timeout (ignore WS0 interrupt) (2) two stages timeout (register WS0 interrupt, do panic in routine) e.User can config working mode by module parameter "action". This patchset has been tested with watchdog daemon (ACPI/FDT, module/build-in) on the following platforms: (1)ARM Foundation v8 model (2)AMD Seattle platform This patchset has been tested with kdump successfully. Changelog: v13:Fix a dev_warn message typo"signle"-->"single" Add MODULE_ALIAS Add more *ed-by in commit message. v12:https://lkml.org/lkml/2016/2/16/154 Fix a dev_warn message typo"fall"--"falling" Remove unnecessary "status" in dts Add more *ed-by in commit message. v11:https://lkml.org/lkml/2016/2/9/577 Merge patch 4 and 5. Improve some comments. The driver works in two modes, it's configured by "action"(instead of panic_enabled). Improve the initialization of the timeout limits. Feeding dog by writing "0" to WRR. v10:https://lkml.org/lkml/2016/2/3/817 Delete pretimeout support. Separate the driver to two parts: (1) single stage timeout driver(ignore WS0 interrupt); (2) register WS0 interrupt for the half timeout panic. timeout == (enable --> WS1). v9: https://lkml.org/lkml/2015/11/9/57 Rebase to latest kernel version(4.3). Update the Documentation of sbsa-gwdt device node info of FDT: (1) move some introduction to pretimeout patch (2) delete WS1 value from "interrupts" of binding documentation, since WS1 won't be handled by Linux. v8: https://lkml.org/lkml/2015/10/27/466 Rebase to latest kernel version(4.3-rc7). Separate the patches of GTDT support and arm_arch_timer. This clocksource relevant patch will upstreamed in a individual patchset. Update all the default timeout and pretimeout to 30s and 60s. Improve documentation and inline comments. Fix a bug in pretimeout support which makes timeout and pretimeout parameters initialization fail. v7: https://lkml.org/lkml/2015/8/24/611 Rebase to latest kernel version(4.2-rc7). Improve FDT support: geting resource by order, instead of name. According to the FDT support, Update the example dts file, gtdt.c and sbsa_gwdt.c. Pass the sparse test, and fix the warning. Fix the max_pretimeout and max_timeout value overflow bug. Delete the WCV output value. v6: https://lkml.org/lkml/2015/6/23/359 Improve the dtb example files: reduce the register frame size to 4K. Improve pretimeout support: (1) improve watchdog_init_timeouts function (2) rename watchdog_check_min_max_timeouts back to the original name (1) improve watchdog_timeout_invalid/watchdog_pretimeout_invalid Add the new features in the sbsa_gwdt driver: (1) In the second stage, user can feed the dog without cleaning WS0. (2) In the second stage, user can trigger WS1 by setting pretimeout = 0. (3) expand the max value of pretimeout, in case 10 second is not enough for a kdump kernel reboot in panic. v5: https://lkml.org/lkml/2015/6/10/357 Improve pretimeout support: (1)fix typo in documentation and comments. (2)fix the timeout limits validation bug. Simplify sbsa_gwdt driver: (1)integrate all the registers access functions into caller. v4: https://lkml.org/lkml/2015/6/2/4 Refactor GTDT support code: remove it from arch/arm64/kernel/acpi.c, put it into drivers/acpi/gtdt.c file. Integrate the GTDT code of drivers/clocksource/arm_arch_timer.c into drivers/acpi/gtdt.c. Improve pretimeout support, fix "pretimeout == 0" problem. Simplify sbsa_gwdt driver: (1)timeout/pretimeout limits setup; (2)keepalive function; (3)delete "clk == 0" check; (4)delete WS0 status bit check in interrupt routine; (5)sbsa_gwdt_set_wcv function. v3: https://lkml.org/lkml/2015/5/25/111 Delete "export arch_timer_get_rate" patch. Driver back to use arch_timer_get_cntfrq. Improve watchdog_init_timeouts function and update relevant documentation. Improve watchdog_timeout_invalid and watchdog_pretimeout_invalid. Improve foundation-v8.dts: delete the unnecessary tag of device node. Remove "ARM64 || COMPILE_TEST" from Kconfig. Add comments in arch/arm64/kernel/acpi.c Fix typoes and incorrect comments. v2: https://lkml.org/lkml/2015/5/21/172 Improve watchdog-kernel-api.txt documentation for pretimeout support. Export "arch_timer_get_rate" in arm_arch_timer.c. Add watchdog_init_timeouts API for pretimeout support in framework. Improve suspend and resume foundation in driver Improve timeout/pretimeout values init code in driver. Delete unnecessary items of the sbsa_gwdt struct and #define. Delete all unnecessary debug info in driver. Fix 64bit division bug. Use the arch_timer interface to get watchdog clock rate. Add MODULE_DEVICE_TABLE for platform device id. Fix typoes. v1: https://lkml.org/lkml/2015/5/15/279 The first version upstream patchset to linux mailing list. Fu Wei (4): Documentation: add sbsa-gwdt driver documentation ARM64: add SBSA Generic Watchdog device node in foundation-v8.dts ARM64: add SBSA Generic Watchdog device node in amd-seattle-soc.dtsi Watchdog: introduce ARM SBSA watchdog driver .../devicetree/bindings/watchdog/sbsa-gwdt.txt | 31 ++ Documentation/watchdog/watchdog-parameters.txt | 7 + arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi | 8 + arch/arm64/boot/dts/arm/foundation-v8.dts | 7 + drivers/watchdog/Kconfig | 20 + drivers/watchdog/Makefile | 1 + drivers/watchdog/sbsa_gwdt.c | 404 +++++++++++++++++++++ 7 files changed, 478 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt create mode 100644 drivers/watchdog/sbsa_gwdt.c -- 2.5.0

8 years, 2 months

[PATCH 00/21] Full ACPI compliance testing for the FADT

by Al Stone

This constitutes a major rewrite and restructuring of the FADT tests for ACPI. There is now a compliance test for every field that we can test. Some we cannot test since any possible value in the field is also an allowed value. In some cases, the tests are an extension of existing tests -- for the PM blocks, SMI_CMD and the GPE blocks, for example. In the rest, these are new tests, and all of these are part of what used to be a much smaller test1. The original test2 and test3 are almost entirely intact since they did some solid testing of semantics across several related fields. The largest structural change is around reduced hardware mode. There is now a test specific to that mode verifying that all of the fields in the FADT that are to be ignored are set to zero. Further, tests that are irrelevant to reduced hardware mode are skipped when we have tables in that mode. Some of the patches are simply to enable compiling the FADT tests on non-x86 architectures; they were completely disabled previously. I did attempt to break up the patches into reasonable chunks but some of them still may have ended up fairly large. This has been tested on arm64 and x86-64, using arm64 and x86 ACPI tables. I am sure the testing has not been exhaustive; there are a *lot* of fields in the FADT. Al Stone (21): FADT: enable compiling on non-x86 architectures FADT: non-x86 machines need an FADT but x86 can survive without one FADT: disable SCI_EN and RESET_REG tests when in reduced hardware mode FADT: add in code to log basic info about the various FADT flag fields Add in bit masks for FACS flags. FADT: move log info out of test2, will provide it elsewhere ACPI: Add hypervisor ID field to FADT. FADT: minor cleanup and initial compliance tests FADT: expand the compliance test for FIRMWARE_CTRL fields FADT: expand compliance checks for DSDT and X_DSDT fields FADT: add compliance tests for reserved fields, PM profile, reduced hardware FADT: restructure test sequence around reduced hardware mode FADT: expand compliance tests for the SMI_CMD field FADT: add compliance tests for the ACPI_ENABLE and ACPI_DISABLE fields FADT: add compliance tests for S4BIOS_REQ and PSTATE_CNT fields FADT: extend and add PM address block compliance tests FADT: enhance compliance tests for GPE blocks FADT: add compliance test for the CST_CNT field FADT: add in compliance tests for C2/C3 latency fields FADT: add in SLEEP_CONTROL_REG and SLEEP_STATUS_REG compliance tests FADT: remove no longer useful variables from test1 src/acpi/fadt/fadt.c | 1718 ++++++++++++++++++++++++++++++++++++------- src/lib/include/fwts_acpi.h | 35 + 2 files changed, 1499 insertions(+), 254 deletions(-) -- 2.5.0

8 years, 2 months

leg-kernel tag leg-20160216.0 released

by Graeme Gregory

The leg-kernel release has been made and tagged as leg-201600216.0 This is based on mainline kernel v4.5-rc4 Repository : http://git.linaro.org/leg/acpi/leg-kernel.git Direct Link: https://git.linaro.org/leg/acpi/leg-kernel.git/commit/be063f18ad780f20de7f1… Topic Branches :- http://git.linaro.org/leg/acpi/acpi.git - topic-pci [topic-pci-20160215.0] - topic-numa [topic-numa-20160216.0] - topic-amba-probing [topic-amba-probing-20160216.0] - topic-acpi-console [topic-acpi-console-20160215.0] - topic-gtdt-wakeup-timer [topic-gtdt-wakeup-timer-20160216.0] - topic-fvp [topic-fvp-20160216.0] - topic-kvm-acpi [topic-kvm-acpi-20160216.0] - topic-sbsa-watchdog [topic-sbsa-watchdog-20160216.0] - topic-apei [topic-apei-20160216.0] http://git.linaro.org/leg/acpi/leg-kernel.git - leg-configs [leg-configs-20150216.0] NOTES:-

8 years, 2 months

[PATCH v11 0/4] Watchdog: introduce ARM SBSA watchdog driver

by fu.wei＠linaro.org

From: Fu Wei <fu.wei(a)linaro.org> This patchset: (1)Introduce Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt for FDT info of SBSA Generic Watchdog, and give two examples of adding SBSA Generic Watchdog device node into the dts files: foundation-v8.dts and amd-seattle-soc.dtsi. (2)Introduce ARM SBSA watchdog driver: a.Use linux kernel watchdog framework; b.Work with FDT on ARM64; c.Support getting timeout from parameter and FDT at the driver init stage. d.The driver works in two modes: (1) single stage timeout (ignore WS0 interrupt) (2) two stages timeout (register WS0 interrupt, do panic in routine) e.User can config working mode by module parameter "action". This patchset has been tested with watchdog daemon (ACPI/FDT, module/build-in) on the following platforms: (1)ARM Foundation v8 model (2)AMD Seattle platform This patchset has been tested with kdump successfully. Changelog: v11:Merge patch 4 and 5. Improve some comments. The driver works in two modes, it's configured by "action"(instead of panic_enabled). Improve the initialization of the timeout limits. Feeding dog by writing "0" to WRR. v10:https://lkml.org/lkml/2016/2/3/817 Delete pretimeout support. Separate the driver to two parts: (1) single stage timeout driver(ignore WS0 interrupt); (2) register WS0 interrupt for the half timeout panic. timeout == (enable --> WS1). v9: https://lkml.org/lkml/2015/11/9/57 Rebase to latest kernel version(4.3). Update the Documentation of sbsa-gwdt device node info of FDT: (1) move some introduction to pretimeout patch (2) delete WS1 value from "interrupts" of binding documentation, since WS1 won't be handled by Linux. v8: https://lkml.org/lkml/2015/10/27/466 Rebase to latest kernel version(4.3-rc7). Separate the patches of GTDT support and arm_arch_timer. This clocksource relevant patch will upstreamed in a individual patchset. Update all the default timeout and pretimeout to 30s and 60s. Improve documentation and inline comments. Fix a bug in pretimeout support which makes timeout and pretimeout parameters initialization fail. v7: https://lkml.org/lkml/2015/8/24/611 Rebase to latest kernel version(4.2-rc7). Improve FDT support: geting resource by order, instead of name. According to the FDT support, Update the example dts file, gtdt.c and sbsa_gwdt.c. Pass the sparse test, and fix the warning. Fix the max_pretimeout and max_timeout value overflow bug. Delete the WCV output value. v6: https://lkml.org/lkml/2015/6/23/359 Improve the dtb example files: reduce the register frame size to 4K. Improve pretimeout support: (1) improve watchdog_init_timeouts function (2) rename watchdog_check_min_max_timeouts back to the original name (1) improve watchdog_timeout_invalid/watchdog_pretimeout_invalid Add the new features in the sbsa_gwdt driver: (1) In the second stage, user can feed the dog without cleaning WS0. (2) In the second stage, user can trigger WS1 by setting pretimeout = 0. (3) expand the max value of pretimeout, in case 10 second is not enough for a kdump kernel reboot in panic. v5: https://lkml.org/lkml/2015/6/10/357 Improve pretimeout support: (1)fix typo in documentation and comments. (2)fix the timeout limits validation bug. Simplify sbsa_gwdt driver: (1)integrate all the registers access functions into caller. v4: https://lkml.org/lkml/2015/6/2/4 Refactor GTDT support code: remove it from arch/arm64/kernel/acpi.c, put it into drivers/acpi/gtdt.c file. Integrate the GTDT code of drivers/clocksource/arm_arch_timer.c into drivers/acpi/gtdt.c. Improve pretimeout support, fix "pretimeout == 0" problem. Simplify sbsa_gwdt driver: (1)timeout/pretimeout limits setup; (2)keepalive function; (3)delete "clk == 0" check; (4)delete WS0 status bit check in interrupt routine; (5)sbsa_gwdt_set_wcv function. v3: https://lkml.org/lkml/2015/5/25/111 Delete "export arch_timer_get_rate" patch. Driver back to use arch_timer_get_cntfrq. Improve watchdog_init_timeouts function and update relevant documentation. Improve watchdog_timeout_invalid and watchdog_pretimeout_invalid. Improve foundation-v8.dts: delete the unnecessary tag of device node. Remove "ARM64 || COMPILE_TEST" from Kconfig. Add comments in arch/arm64/kernel/acpi.c Fix typoes and incorrect comments. v2: https://lkml.org/lkml/2015/5/21/172 Improve watchdog-kernel-api.txt documentation for pretimeout support. Export "arch_timer_get_rate" in arm_arch_timer.c. Add watchdog_init_timeouts API for pretimeout support in framework. Improve suspend and resume foundation in driver Improve timeout/pretimeout values init code in driver. Delete unnecessary items of the sbsa_gwdt struct and #define. Delete all unnecessary debug info in driver. Fix 64bit division bug. Use the arch_timer interface to get watchdog clock rate. Add MODULE_DEVICE_TABLE for platform device id. Fix typoes. v1: https://lkml.org/lkml/2015/5/15/279 The first version upstream patchset to linux mailing list. Fu Wei (4): Documentation: add sbsa-gwdt driver documentation ARM64: add SBSA Generic Watchdog device node in foundation-v8.dts ARM64: add SBSA Generic Watchdog device node in amd-seattle-soc.dtsi Watchdog: introduce ARM SBSA watchdog driver .../devicetree/bindings/watchdog/sbsa-gwdt.txt | 35 ++ Documentation/watchdog/watchdog-parameters.txt | 7 + arch/arm64/boot/dts/amd/amd-seattle-soc.dtsi | 9 + arch/arm64/boot/dts/arm/foundation-v8.dts | 8 + drivers/watchdog/Kconfig | 20 + drivers/watchdog/Makefile | 1 + drivers/watchdog/sbsa_gwdt.c | 403 +++++++++++++++++++++ 7 files changed, 483 insertions(+) create mode 100644 Documentation/devicetree/bindings/watchdog/sbsa-gwdt.txt create mode 100644 drivers/watchdog/sbsa_gwdt.c -- 2.5.0

8 years, 2 months

[PATCH v2 0/5] Update ACPI RSDP tests to be specification compliant

by Al Stone

Add in several tests that extend the testing done on the RSDP. If these tests are all passed, the RSDP being examined should be compliant with the ACPI 6.0 spec. As part of that, when creating a dummy RSDP to substitute for one that cannot be read or found, use either RsdtAddress or XsdtAddress as described in the spec. For non-arm64, either can be used, but for arm64, only the XsdtAddress is to be used. Finally, update the regression tests for RSDP. Changes for v2: -- Clean up failure messages to be more like expected messages (per Alex Hung) -- Bodge up both RSDT and XSDT pointers on x86 (Alex Hung) Al Stone (5): RSDP: minor cleanups to rsdp.c for checkpatch issues utilities: add a helper function for printing out architecture names ACPI tables: when bodging up an RSDP, do the right thing for the arch ACPI RSDP: flesh out the tests to check for full spec compliance. Update regression test rsdp-0001/test-0001.sh fwts-test/rsdp-0001/rsdp.log | 17 ++++- src/acpi/rsdp/rsdp.c | 158 +++++++++++++++++++++++++++++++++++++---- src/lib/include/fwts_arch.h | 1 + src/lib/src/fwts_acpi_tables.c | 25 ++++--- src/lib/src/fwts_arch.c | 18 +++++ 5 files changed, 195 insertions(+), 24 deletions(-) -- 2.5.0

8 years, 2 months

[RFC PATCH] ARM64: ACPI: Update documentation for latest specification version

by Al Stone

NB: I'm only sending this to a small audience for now to get some initial feedback. If I've missed someone you think might be useful, feel free to pass this on. The ACPI 6.1 specification was recently released at the end of January 2016, but the arm64 kernel documentation for the use of ACPI was written for the 5.1 version of the spec. There were significant additions to the spec that had not yet been mentioned -- for example, the 6.0 mechanisms added to make it easier to define processors and low power idle states, as well as the 6.1 addition allowing regular interrupts (not just from GPIO) be used to signal ACPI general purpose events. This patch reflects going back through and examining the specs in detail and updating content appropriately. Whilst there, a few odds and ends of typos were caught as well. This brings the documentation up to date with ACPI 6.1 for arm64. Signed-off-by: Al Stone <al.stone(a)linaro.org> --- Documentation/arm64/acpi_object_usage.txt | 433 ++++++++++++++++++++++-------- Documentation/arm64/arm-acpi.txt | 28 +- 2 files changed, 346 insertions(+), 115 deletions(-) diff --git a/Documentation/arm64/acpi_object_usage.txt b/Documentation/arm64/acpi_object_usage.txt index a6e1a18..e321235 100644 --- a/Documentation/arm64/acpi_object_usage.txt +++ b/Documentation/arm64/acpi_object_usage.txt @@ -13,13 +13,14 @@ For ACPI on arm64, tables also fall into the following categories: -- Required: DSDT, FADT, GTDT, MADT, MCFG, RSDP, SPCR, XSDT - -- Recommended: BERT, EINJ, ERST, HEST, SSDT + -- Recommended: BERT, EINJ, ERST, HEST, IORT, PCCT, SSDT - -- Optional: BGRT, CPEP, CSRT, DRTM, ECDT, FACS, FPDT, MCHI, MPST, - MSCT, RASF, SBST, SLIT, SPMI, SRAT, TCPA, TPM2, UEFI + -- Optional: BGRT, CPEP, CSRT, DBG2, DRTM, ECDT, FACS, FPDT, MCHI, + MPST, MSCT, NFIT, PMTT, RASF, SBST, SLIT, SPMI, SRAT, STAO, TCPA, + TPM2, UEFI, XENV - -- Not supported: BOOT, DBG2, DBGP, DMAR, ETDT, HPET, IBFT, IVRS, - LPIT, MSDM, RSDT, SLIC, WAET, WDAT, WDRT, WPBT + -- Not supported: BOOT, DBGP, DMAR, ETDT, HPET, IBFT, IVRS, LPIT, + MSDM, OEMx, PSDT, RSDT, SLIC, WAET, WDAT, WDRT, WPBT Table Usage for ARMv8 Linux @@ -50,7 +51,9 @@ CSRT Signature Reserved (signature == "CSRT") DBG2 Signature Reserved (signature == "DBG2") == DeBuG port table 2 == - Microsoft only table, will not be supported. + License has changed and should be usable. Patches are available as of + this writing, but they have not been accepted into the kernel. Optional + if used instead of earlycon=<device> on the command line. DBGP Signature Reserved (signature == "DBGP") == DeBuG Port table == @@ -133,10 +136,11 @@ GTDT Section 5.2.24 (signature == "GTDT") HEST Section 18.3.2 (signature == "HEST") == Hardware Error Source Table == - Until further error source types are defined, use only types 6 (AER - Root Port), 7 (AER Endpoint), 8 (AER Bridge), or 9 (Generic Hardware - Error Source). Firmware first error handling is possible if and only - if Trusted Firmware is being used on arm64. + ARM-specific error sources have been defined; please use those or the + PCI types such as type 6 (AER Root Port), 7 (AER Endpoint), or 8 (AER + Bridge), or use type 9 (Generic Hardware Error Source). Firmware first + error handling is possible if and only if Trusted Firmware is being + used on arm64. Must be supplied if RAS support is provided by the platform. It is recommended this table be supplied. @@ -149,20 +153,26 @@ IBFT Signature Reserved (signature == "IBFT") == iSCSI Boot Firmware Table == Microsoft defined table, support TBD. +IORT Signature Reserved (signature == "IORT") + == Input Output Remapping Table == + arm64 only table, required in order to describe the SMMU and/or ITS + when it is provided by the platform. + IVRS Signature Reserved (signature == "IVRS") == I/O Virtualization Reporting Structure == x86_64 (AMD) only table, will not be supported. LPIT Signature Reserved (signature == "LPIT") == Low Power Idle Table == - x86 only table as of ACPI 5.1; future versions have been adapted for - use with ARM and will be recommended in order to support ACPI power - management. + x86 only table as of ACPI 5.1; starting with ACPI 6.0, processor + descriptions and power states on ARM platforms should use the DSDT + and define processor container devices (_HID ACPI0010, Section 8.4, + and more specifically 8.4.3 and and 8.4.4). MADT Section 5.2.12 (signature == "APIC") == Multiple APIC Description Table == Required for arm64. Only the GIC interrupt controller structures - should be used (types 0xA - 0xE). + should be used (types 0xA - 0xF). MCFG Signature Reserved (signature == "MCFG") == Memory-mapped ConFiGuration space == @@ -176,14 +186,38 @@ MPST Section 5.2.21 (signature == "MPST") == Memory Power State Table == Optional, not currently supported. +MSCT Section 5.2.19 (signature == "MSCT") + == Maximum System Characteristic Table == + Optional, not currently supported. + MSDM Signature Reserved (signature == "MSDM") == Microsoft Data Management table == Microsoft only table, will not be supported. -MSCT Section 5.2.19 (signature == "MSCT") - == Maximum System Characteristic Table == +NFIT Section 5.2.25 (signature == "NFIT") + == NVDIMM Firmware Interface Table == Optional, not currently supported. +OEMx Signature of "OEMx" only + == OEM Specific Tables == + All tables starting with a signature of "OEM" are reserved for OEM + use. Since these are not meant to be of general use but are limited + to very specific end users, they are not recommended for use and are + not supported by the kernel for arm64. + +PCCT Section 14.1 (signature == "PCCT) + == Platform Communications Channel Table == + Recommend for use on arm64, and required when using CPPC to control + power on the platform. + +PMTT Section 5.2.21.12 (signature == "PMTT") + == Platform Memory Topology Table == + Optional, but useful, but not currently supported. + +PSDT Section 5.2.11.3 (signature == "PSDT") + == Persistent System Description Table == + Obsolete table, will not be supported. + RASF Section 5.2.20 (signature == "RASF") == RAS Feature table == Optional, not currently supported. @@ -195,7 +229,7 @@ RSDP Section 5.2.5 (signature == "RSD PTR") RSDT Section 5.2.7 (signature == "RSDT") == Root System Description Table == Since this table can only provide 32-bit addresses, it is deprecated - on arm64, and will not be used. + on arm64, and will not be used. If provided, it will be ignored. SBST Section 5.2.14 (signature == "SBST") == Smart Battery Subsystem Table == @@ -207,7 +241,7 @@ SLIC Signature Reserved (signature == "SLIC") SLIT Section 5.2.17 (signature == "SLIT") == System Locality distance Information Table == - Optional in general, but required for NUMA systems. + Optional in general, but required for arm64 NUMA systems. SPCR Signature Reserved (signature == "SPCR") == Serial Port Console Redirection table == @@ -220,7 +254,7 @@ SPMI Signature Reserved (signature == "SPMI") SRAT Section 5.2.16 (signature == "SRAT") == System Resource Affinity Table == Optional, but if used, only the GICC Affinity structures are read. - To support NUMA, this table is required. + To support arm64 NUMA, this table is required. SSDT Section 5.2.11.2 (signature == "SSDT") == Secondary System Description Table == @@ -235,6 +269,11 @@ SSDT Section 5.2.11.2 (signature == "SSDT") These tables are optional, however. ACPI tables should contain only one DSDT but can contain many SSDTs. +STAO Signature Reserved (signature == "STAO") + == _STA Override table == + Optional, but only necessary in virtualized environments in order to + hide devices from guest OSs. + TCPA Signature Reserved (signature == "TCPA") == Trusted Computing Platform Alliance table == Optional, not currently supported, and may need changes to fully @@ -266,6 +305,10 @@ WPBT Signature Reserved (signature == "WPBT") == Windows Platform Binary Table == Microsoft only table, will not be supported. +XENV Signature Reserved (signature == "XENV") + == Xen project table == + Optional, used only by Xen at present. + XSDT Section 5.2.8 (signature == "XSDT") == eXtended System Description Table == Required for arm64. @@ -273,31 +316,50 @@ XSDT Section 5.2.8 (signature == "XSDT") ACPI Objects ------------ -The expectations on individual ACPI objects are discussed in the list that -follows: +The expectations on individual ACPI objects that are likely to be used are +shown in the list that follows: Name Section Usage for ARMv8 Linux ---- ------------ ------------------------------------------------- +_ACx 11.4.1 Use as needed. + _ADR 6.1.1 Use as needed. +_ALx 11.4.2 Use as needed. + +_ART 11.4.3 Use as needed. + _BBN 6.5.5 Use as needed; PCI-specific. -_BDN 6.5.3 Optional; not likely to be used on arm64. +_CCA 6.2.17 This method must be defined for all bus masters + on arm64 -- there are no assumptions made about + whether such devices are cache coherent or not. + The _CCA value is inherited by all descendants of + these devices so it does not need to be repeated. + Without _CCA on arm64, the kernel does not know what + to do about setting up DMA for the device. + +_CDM 6.2.1 Use as needed, to be used only for processor devices. -_CCA 6.2.17 This method should be defined for all bus masters - on arm64. While cache coherency is assumed, making - it explicit ensures the kernel will set up DMA as - it should. +_CID 6.1.2 Use as needed, see also _HID. -_CDM 6.2.1 Optional, to be used only for processor devices. +_CLS 6.1.3 Use as needed, see also _HID. -_CID 6.1.2 Use as needed. +_CPC 8.4.7.1 Use as needed; power management specific. CPPC is + recommended on arm64. -_CLS 6.1.3 Use as needed. +_CR3 11.4.5 Use as needed. _CRS 6.2.2 Required on arm64. -_DCK 6.5.2 Optional; not likely to be used on arm64. +_CRT 11.4.4 Use as needed. + +_CSD 8.4.2.2 Use as needed, used only in conjuction with _CST. + +_CST 8.4.2.1 Low power idle states (8.4.4) are recommended instead + of C-states. + +_CWS 9.18.6 Use as needed. _DDN 6.1.4 This field can be used for a device name. However, it is meant for DOS device names (e.g., COM1), so be @@ -305,11 +367,11 @@ _DDN 6.1.4 This field can be used for a device name. However, _DEP 6.5.8 Use as needed. -_DIS 6.2.3 Optional, for power management use. +_DIS 6.2.3 Use as needed, for power management use. -_DLM 5.7.5 Optional. +_DLM 5.7.5 Use as needed. -_DMA 6.2.4 Optional. +_DMA 6.2.4 Use as needed. _DSD 6.2.5 To be used with caution. If this object is used, try to use it within the constraints already defined by the @@ -325,19 +387,29 @@ _DSD 6.2.5 To be used with caution. If this object is used, try with the UEFI Forum; this may cause some iteration as more than one OS will be registering entries. -_DSM Do not use this method. It is not standardized, the +_DSM 9.1.1 Do not use this method. It is not standardized, the return values are not well documented, and it is currently a frequent source of error. -_DSW 7.2.1 Use as needed; power management specific. +_DSW 7.3.1 Use as needed; power management specific. -_EDL 6.3.1 Optional. +_DTI 11.4.6 Use as needed. -_EJD 6.3.2 Optional. +_EDL 6.3.1 Use as needed. -_EJx 6.3.3 Optional. +_EJD 6.3.2 Use as needed. -_FIX 6.2.7 x86 specific, not used on arm64. +_EJx 6.3.3 Use as needed. + +_FIF 11.3.1.1 Use as needed. + +_FPS 11.3.1.2 Use as needed. + +_FSL 11.3.1.3 Use as needed. + +_FST 11.3.1.4 Use as needed. + +_GCP 9.18.2 Use as needed. \_GL 5.7.1 This object is not to be used in hardware reduced mode, and therefore should not be used on arm64. @@ -349,35 +421,56 @@ _GLK 6.5.7 This object requires a global lock be defined; there \_GPE 5.3.1 This namespace is for x86 use only. Do not use it on arm64. -_GSB 6.2.7 Optional. +_GRT 9.18.3 Use as needed. + +_GSB 6.2.7 Use as needed. + +_GTF 9.9.1.1 Use as needed. + +_GWS 9.18.5 Use as needed. _HID 6.1.5 Use as needed. This is the primary object to use in device probing, though _CID and _CLS may also be used. -_HPP 6.2.8 Optional, PCI specific. +_HOT 11.4.7 Use as needed. + +_HPP 6.2.8 Use as needed, PCI specific. -_HPX 6.2.9 Optional, PCI specific. +_HPX 6.2.9 Use as needed, PCI specific. -_HRV 6.1.6 Optional, use as needed to clarify device behavior; in +_HRV 6.1.6 Use as needed, use as needed to clarify device behavior; in some cases, this may be easier to use than _DSD. _INI 6.5.1 Not required, but can be useful in setting up devices when UEFI leaves them in a state that may not be what the driver expects before it starts probing. -_IRC 7.2.15 Use as needed; power management specific. +_IRC 7.3.15 Use as needed; power management specific. + +_LCK 6.3.4 Use as needed. + +_LPI 8.4.4.3 Use as needed, but recommended for use with processor + definitions (_HID ACPI0010) on arm64. -_LCK 6.3.4 Optional. +_MAT 6.2.10 Use as needed; see also the MADT. -_MAT 6.2.10 Optional; see also the MADT. +_MBM 9.13.2.1 Use as needed. -_MLS 6.1.7 Optional, but highly recommended for use in +_MLS 6.1.7 Use as needed, but highly recommended for use in internationalization. -_OFF 7.1.2 It is recommended to define this method for any device +_MSG 9.2.2 Use as needed. + +_MSM 9.13.2.2 Use as needed. + +_MTL 11.4.8 Use as needed. + +_NTT 11.4.9 Use as needed. + +_OFF 7.2.2 It is recommended to define this method for any device that can be turned on or off. -_ON 7.1.3 It is recommended to define this method for any device +_ON 7.2.3 It is recommended to define this method for any device that can be turned on or off. \_OS 5.7.3 This method will return "Linux" by default (this is @@ -405,115 +498,219 @@ _OSC 6.2.11 This method can be a global method in ACPI (i.e., being used or what functionality is provided. The _OSC method is to be used instead. -_OST 6.3.5 Optional. +_OST 6.3.5 Use as needed. + +_PCT 8.4.6.1 Use as needed; power management specific. _PDC 8.4.1 Deprecated, do not use on arm64. +_PDL 8.4.6.2 Use as needed; power management specific. + \_PIC 5.8.1 The method should not be used. On arm64, the only interrupt model available is GIC. -_PLD 6.1.8 Optional. +_PLD 6.1.8 Use as needed. + +_PPC 8.4.6.3 Use as needed; power management specific. + +_PPE 8.4.8 Use as needed. \_PR 5.3.1 This namespace is for x86 use only on legacy systems. Do not use it on arm64. -_PRS 6.2.12 Optional. +_PRE 7.3.12 Use as needed; power management specific. + +_PRR 7.3.26 Use as needed; power management specific. + +_PRS 6.2.12 Use as needed. _PRT 6.2.13 Required as part of the definition of all PCI root devices. -_PRW 7.2.13 Use as needed; power management specific. +_PRW 7.3.13 Use as needed; power management specific. -_PRx 7.2.8-11 Use as needed; power management specific. If _PR0 is +_PRx 7.3.8-11 Use as needed; power management specific. If _PR0 is defined, _PR3 must also be defined. -_PSC 7.2.6 Use as needed; power management specific. +_PSC 7.3.6 Use as needed; power management specific. + +_PSD 8.4.6.5 Use as needed; power management specific. -_PSE 7.2.7 Use as needed; power management specific. +_PSE 7.3.7 Use as needed; power management specific. -_PSW 7.2.14 Use as needed; power management specific. +_PSL 11.4.10 Use as needed. -_PSx 7.2.2-5 Use as needed; power management specific. If _PS0 is +_PSS 8.4.6.2 Use as needed; power management specific. + +_PSV 11.4.11 Use as needed. + +_PSW 7.3.14 Use as needed; power management specific. + +_PSx 7.3.2-5 Use as needed; power management specific. If _PS0 is defined, _PS3 must also be defined. If clocks or regulators need adjusting to be consistent with power usage, change them in these methods. -\_PTS 7.3.1 Use as needed; power management specific. +_PTC 8.4.5.1 Use as needed; power management specific. + +\_PTS 7.4.1 Use as needed; power management specific. + +_PUR 8.5.1.1 Use as needed. + +_PXM 6.2.14 Use as needed. -_PXM 6.2.14 Optional. +_RDI 8.4.4.4 Use as needed, but recommended for use with processor + definitions (_HID ACPI0010) on arm64. _REG 6.5.4 Use as needed. \_REV 5.7.4 Always returns the latest version of ACPI supported. -_RMV 6.3.6 Optional. +_RMV 6.3.6 Use as needed. + +_RST 7.3.25 Use as needed; power management specific. + +_RTV 11.4.12 Use as needed. \_SB 5.3.1 Required on arm64; all devices must be defined in this namespace. +_SCP 11.4.13 Use as needed. + +_SDD 9.9.3.3.1 Use as needed. + _SEG 6.5.6 Use as needed; PCI-specific. -\_SI 5.3.1, Optional. - 9.1 +\_SI 5.3.1, Use as needed. + 9.2 + +_SLI 6.2.15 Use as needed; recommended when SLIT table is in use. -_SLI 6.2.15 Optional; recommended when SLIT table is in use. +_SRT 9.18.4 Use as needed. _STA 6.3.7, It is recommended to define this method for any device - 7.1.4 that can be turned on or off. + 7.2.4 that can be turned on or off. See also the STAO table + that provides overrides to hide devices in virtualized + environments. -_SRS 6.2.16 Optional; see also _PRS. +_SRS 6.2.16 Use as needed; see also _PRS. + +_SST 9.2.1 Use as needed. _STR 6.1.10 Recommended for conveying device names to end users; this is preferred over using _DDN. +_SST 9.2.1 Use as needed. + +_STP 9.18.7 Use as needed. + +_STV 9.18.8 Use as needed. + _SUB 6.1.9 Use as needed; _HID or _CID are preferred. -_SUN 6.1.11 Optional. +_SUN 6.1.11 Use as needed, but recommended. -\_Sx 7.3.2 Use as needed; power management specific. +\_Sx 7.4.2 Use as needed; power management specific. -_SxD 7.2.16-19 Use as needed; power management specific. +_SxD 7.3.16-19 Use as needed; power management specific. -_SxW 7.2.20-24 Use as needed; power management specific. +_SxW 7.3.20-24 Use as needed; power management specific. -_SWS 7.3.3 Use as needed; power management specific; this may +_SWS 7.4.3 Use as needed; power management specific; this may require specification changes for use on arm64. -\_TTS 7.3.4 Use as needed; power management specific. +_TC1 11.4.14 Use as needed. + +_TC2 11.4.15 Use as needed. + +_TDL 8.4.5.5 Use as needed; power management specific. + +_TFP 11.4.16 Use as needed. + +_TIP 9.18.9 Use as needed. + +_TIV 9.18.10 Use as needed. + +_TMP 11.4.17 Use as needed. + +_TPC 8.4.5.3 Use as needed; power management specific. -\_TZ 5.3.1 Optional. +_TPT 11.4.18 Use as needed. + +_TRT 11.4.19 Use as needed. + +_TSD 8.4.5.4 Use as needed; power management specific. + +_TSN 11.4.20 Use as needed. + +_TSP 11.4.21 Use as needed. + +_TSS 8.4.5.2 Use as needed; power management specific. + +_TST 11.4.22 Use as needed. + +\_TTS 7.4.4 Use as needed; power management specific. + +\_TZ 5.3.1 Use as needed. + +_TZD 11.4.23 Use as needed. + +_TZM 11.4.24 Use as needed. + +_TZP 11.4.25 Use as needed. _UID 6.1.12 Recommended for distinguishing devices of the same class; define it if at all possible. -\_WAK 7.3.5 Use as needed; power management specific. +_UPC 9.14 Use as needed. + +\_WAK 7.4.5 Use as needed; power management specific. + + ACPI Event Model ---------------- Do not use GPE block devices; these are not supported in the hardware reduced profile used by arm64. Since there are no GPE blocks defined for use on ARM -platforms, GPIO-signaled interrupts should be used for creating system events. +platforms, ACPI events must be signaled differently. + +There are two options: GPIO-signaled interrupts (Section 5.6.5), and +interrupt-signaled events (Section 5.6.9). Interrupt-signaled events are a +new feature in the ACPI 6.1 specification. Either -- or both -- can be used +on a given platform, and which to use may be dependent of limitations in any +given SoC. If possible, interrupt-signaled events are recommended. ACPI Processor Control ---------------------- -Section 8 of the ACPI specification is currently undergoing change that -should be completed in the 6.0 version of the specification. Processor -performance control will be handled differently for arm64 at that point -in time. Processor aggregator devices (section 8.5) will not be used, -for example, but another similar mechanism instead. - -While UEFI constrains what we can say until the release of 6.0, it is -recommended that CPPC (8.4.5) be used as the primary model. This will -still be useful into the future. C-states and P-states will still be -provided, but most of the current design work appears to favor CPPC. +Section 8 of the ACPI specification changed significantly in version 6.0. +Processors should now be defined as Device objects with _HID ACPI0007; do +not use the deprecated Processor statement in ASL. All multiprocessor systems +should also define a hierarchy of processors, done with Processor Container +Devices (see Section 8.4.3.1, _HID ACPI0010); do not use processor aggregator +devices (Section 8.5) to describe processor topology. Section 8.4 of the +specification describes the semantics of these object definitions and how +they interrelate. + +Most importantly, the processor hierarchy defined also defines the low power +idle states that are available to the platform, along with the rules for +determining which processors can be turned on or off and the circumstances +that control that. Without this information, the processors will run in +whatever power state they were left in by UEFI. + +Note too, that the processor Device objects defined and the entries in the +MADT for GICs are expected to be in sychronization. The _UID of the Device +object must correspond to processor IDs used in the MADT. + +It is recommended that CPPC (8.4.5) be used as the primary model for processor +performance control on arm64. C-states and P-states may become available at +some point in the future, but most current design work appears to favor CPPC. Further, it is essential that the ARMv8 SoC provide a fully functional implementation of PSCI; this will be the only mechanism supported by ACPI -to control CPU power state (including secondary CPU booting). - -More details will be provided on the release of the ACPI 6.0 specification. +to control CPU power state. Booting of secondary CPUs may be possible using +parking protocol, but only PSCI is to be used for ARM servers. ACPI System Address Map Interfaces @@ -535,21 +732,25 @@ used to indicate fatal errors that cannot be corrected, and require immediate attention. Since there is no direct equivalent of the x86 SCI or NMI, arm64 handles -these slightly differently. The SCI is handled as a normal GPIO-signaled -interrupt; given that these are corrected (or correctable) errors being -reported, this is sufficient. The NMI is emulated as the highest priority -GPIO-signaled interrupt possible. This implies some caution must be used -since there could be interrupts at higher privilege levels or even interrupts -at the same priority as the emulated NMI. In Linux, this should not be the -case but one should be aware it could happen. +these slightly differently. The SCI is handled as a high priority interrupt; +given that these are corrected (or correctable) errors being reported, this +is sufficient. The NMI is emulated as the highest priority interrupt +possible. This implies some caution must be used since there could be +interrupts at higher privilege levels or even interrupts at the same priority +as the emulated NMI. In Linux, this should not be the case but one should +be aware it could happen. ACPI Objects Not Supported on ARM64 ----------------------------------- While this may change in the future, there are several classes of objects that can be defined, but are not currently of general interest to ARM servers. +Some of these objects have x86 equivalents, and may actually make sense in ARM +servers. However, there is either no hardware available at present, or there +may not even be a non-ARM implementation yet. Hence, they are not currently +supported. -These are not supported: +The following classes of objects are not supported: -- Section 9.2: ambient light sensor devices @@ -571,16 +772,6 @@ These are not supported: -- Section 9.18: time and alarm devices (see 9.15) - -ACPI Objects Not Yet Implemented --------------------------------- -While these objects have x86 equivalents, and they do make some sense in ARM -servers, there is either no hardware available at present, or in some cases -there may not yet be a non-ARM implementation. Hence, they are currently not -implemented though that may change in the future. - -Not yet implemented are: - -- Section 10: power source and power meter devices -- Section 11: thermal management @@ -589,5 +780,31 @@ Not yet implemented are: -- Section 13: SMBus interfaces - -- Section 17: NUMA support (prototypes have been submitted for - review) + +This also mean that there is no support for the following objects: + +Name Section Name Section +---- ------------ ---- ------------ +_ALC 9.3.4 _FDM 9.10.3 +_ALI 9.3.2 _FIX 6.2.7 +_ALP 9.3.6 _GAI 10.4.5 +_ALR 9.3.5 _GHL 10.4.7 +_ALT 9.3.3 _GTM 9.9.2.1.1 +_BCT 10.2.2.10 _LID 9.5.1 +_BDN 6.5.3 _PAI 10.4.4 +_BIF 10.2.2.1 _PCL 10.3.2 +_BIX 10.2.2.1 _PIF 10.3.3 +_BLT 9.2.3 _PMC 10.4.1 +_BMA 10.2.2.4 _PMD 10.4.8 +_BMC 10.2.2.12 _PMM 10.4.3 +_BMD 10.2.2.11 _PRL 10.3.4 +_BMS 10.2.2.5 _PSR 10.3.1 +_BST 10.2.2.6 _PTP 10.4.2 +_BTH 10.2.2.7 _SBS 10.1.3 +_BTM 10.2.2.9 _SHL 10.4.6 +_BTP 10.2.2.8 _STM 9.9.2.1.1 +_DCK 6.5.2 _UPD 9.16.1 +_EC 12.12 _UPP 9.16.2 +_FDE 9.10.1 _WPC 10.5.2 +_FDI 9.10.2 _WPP 10.5.3 + diff --git a/Documentation/arm64/arm-acpi.txt b/Documentation/arm64/arm-acpi.txt index 570a4f8..12381c1 100644 --- a/Documentation/arm64/arm-acpi.txt +++ b/Documentation/arm64/arm-acpi.txt @@ -57,11 +57,11 @@ The short form of the rationale for ACPI on ARM is: -- The new ACPI governance process works well and Linux is now at the same table as hardware vendors and other OS vendors. In fact, there is no - longer any reason to feel that ACPI is only belongs to Windows or that + longer any reason to feel that ACPI only belongs to Windows or that Linux is in any way secondary to Microsoft in this arena. The move of ACPI governance into the UEFI forum has significantly opened up the specification development process, and currently, a large portion of the - changes being made to ACPI is being driven by Linux. + changes being made to ACPI are being driven by Linux. Key to the use of ACPI is the support model. For servers in general, the responsibility for hardware behaviour cannot solely be the domain of the @@ -159,7 +159,7 @@ Further, the ACPI core will only use the 64-bit address fields in the FADT (Fixed ACPI Description Table). Any 32-bit address fields in the FADT will be ignored on arm64. -Hardware reduced mode (see Section 4.1 of the ACPI 5.1 specification) will +Hardware reduced mode (see Section 4.1 of the ACPI 6.1 specification) will be enforced by the ACPI core on arm64. Doing so allows the ACPI core to run less complex code since it no longer has to provide support for legacy hardware from other architectures. Any fields that are not to be used for @@ -167,7 +167,7 @@ hardware reduced mode must be set to zero. For the ACPI core to operate properly, and in turn provide the information the kernel needs to configure devices, it expects to find the following -tables (all section numbers refer to the ACPI 5.1 specfication): +tables (all section numbers refer to the ACPI 6.1 specfication): -- RSDP (Root System Description Pointer), section 5.2.5 @@ -185,9 +185,22 @@ tables (all section numbers refer to the ACPI 5.1 specfication): -- If PCI is supported, the MCFG (Memory mapped ConFiGuration Table), section 5.2.6, specifically Table 5-31. + -- If booting without a console=<device> kernel parameter is + supported, the SPCR (Serial Port Console Redirection table), + section 5.2.6, specifically Table 5-31. + + -- If virtualization is supported, the IORT (Input Output Remapping + Table, section 5.2.6, specifically Table 5-31. + + -- If NUMA is supported, the SRAT (System Resource Affinity Table) + and SLIT (System Locality distance Information Table), sections + 5.2.16 and 5.2.17, respectively. + If the above tables are not all present, the kernel may or may not be able to boot properly since it may not be able to configure all of the -devices available. +devices available. This list of tables is not meant to be all inclusive; +in some environments other tables may be needed (e.g., any of the APEI +tables from section 18) to support specific functionality. ACPI Detection @@ -233,7 +246,7 @@ that looks like this: Name(KEY0, "value0"). An ACPI device driver would then retrieve the value of the property by evaluating the KEY0 object. However, using Name() this way has multiple problems: (1) ACPI limits names ("KEY0") to four characters unlike DT; (2) there is no industry -wide registry that maintains a list of names, minimzing re-use; (3) +wide registry that maintains a list of names, minimizing re-use; (3) there is also no registry for the definition of property values ("value0"), again making re-use difficult; and (4) how does one maintain backward compatibility as new hardware comes out? The _DSD method was created @@ -434,7 +447,8 @@ The ACPI specification changes regularly. During the year 2014, for instance, version 5.1 was released and version 6.0 substantially completed, with most of the changes being driven by ARM-specific requirements. Proposed changes are presented and discussed in the ASWG (ACPI Specification Working Group) which -is a part of the UEFI Forum. +is a part of the UEFI Forum. The current version of the ACPI specification +is 6.1 release in January 2016. Participation in this group is open to all UEFI members. Please see http://www.uefi.org/workinggroup for details on group membership. -- 2.5.0

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Linaro-acpi February 2016