Merge tag 'powerpc-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

 - A series from Nick adding ARCH_WANT_IRQS_OFF_ACTIVATE_MM & selecting
   it for powerpc, as well as a related fix for sparc.

 - Remove support for PowerPC 601.

 - Some fixes for watchpoints & addition of a new ptrace flag for
   detecting ISA v3.1 (Power10) watchpoint features.

 - A fix for kernels using 4K pages and the hash MMU on bare metal
   Power9 systems with > 16TB of RAM, or RAM on the 2nd node.

 - A basic idle driver for shallow stop states on Power10.

 - Tweaks to our sched domains code to better inform the scheduler about
   the hardware topology on Power9/10, where two SMT4 cores can be
   presented by firmware as an SMT8 core.

 - A series doing further reworks & cleanups of our EEH code.

 - Addition of a filter for RTAS (firmware) calls done via sys_rtas(),
   to prevent root from overwriting kernel memory.

 - Other smaller features, fixes & cleanups.

Thanks to: Alexey Kardashevskiy, Andrew Donnellan, Aneesh Kumar K.V,
Athira Rajeev, Biwen Li, Cameron Berkenpas, Cédric Le Goater, Christophe
Leroy, Christoph Hellwig, Colin Ian King, Daniel Axtens, David Dai, Finn
Thain, Frederic Barrat, Gautham R. Shenoy, Greg Kurz, Gustavo Romero,
Ira Weiny, Jason Yan, Joel Stanley, Jordan Niethe, Kajol Jain, Konrad
Rzeszutek Wilk, Laurent Dufour, Leonardo Bras, Liu Shixin, Luca
Ceresoli, Madhavan Srinivasan, Mahesh Salgaonkar, Nathan Lynch, Nicholas
Mc Guire, Nicholas Piggin, Nick Desaulniers, Oliver O'Halloran, Pedro
Miraglia Franco de Carvalho, Pratik Rajesh Sampat, Qian Cai, Qinglang
Miao, Ravi Bangoria, Russell Currey, Satheesh Rajendran, Scott Cheloha,
Segher Boessenkool, Srikar Dronamraju, Stan Johnson, Stephen Kitt,
Stephen Rothwell, Thiago Jung Bauermann, Tyrel Datwyler, Vaibhav Jain,
Vaidyanathan Srinivasan, Vasant Hegde, Wang Wensheng, Wolfram Sang, Yang
Yingliang, zhengbin.

* tag 'powerpc-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (228 commits)
  Revert "powerpc/pci: unmap legacy INTx interrupts when a PHB is removed"
  selftests/powerpc: Fix eeh-basic.sh exit codes
  cpufreq: powernv: Fix frame-size-overflow in powernv_cpufreq_reboot_notifier
  powerpc/time: Make get_tb() common to PPC32 and PPC64
  powerpc/time: Make get_tbl() common to PPC32 and PPC64
  powerpc/time: Remove get_tbu()
  powerpc/time: Avoid using get_tbl() and get_tbu() internally
  powerpc/time: Make mftb() common to PPC32 and PPC64
  powerpc/time: Rename mftbl() to mftb()
  powerpc/32s: Remove #ifdef CONFIG_PPC_BOOK3S_32 in head_book3s_32.S
  powerpc/32s: Rename head_32.S to head_book3s_32.S
  powerpc/32s: Setup the early hash table at all time.
  powerpc/time: Remove ifdef in get_dec() and set_dec()
  powerpc: Remove get_tb_or_rtc()
  powerpc: Remove __USE_RTC()
  powerpc: Tidy up a bit after removal of PowerPC 601.
  powerpc: Remove support for PowerPC 601
  powerpc: Remove PowerPC 601
  powerpc: Drop SYNC_601() ISYNC_601() and SYNC()
  powerpc: Remove CONFIG_PPC601_SYNC_FIX
  ...

Author: torvalds

Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_24x7

@@ -1,3 +1,28 @@
+What:           /sys/bus/event_source/devices/hv_24x7/format
+Date:           September 2020
+Contact:        Linux on PowerPC Developer List <[email protected]>
+Description:    Read-only. Attribute group to describe the magic bits
+                that go into perf_event_attr.config for a particular pmu.
+                (See ABI/testing/sysfs-bus-event_source-devices-format).
+
+                Each attribute under this group defines a bit range of the
+                perf_event_attr.config. All supported attributes are listed
+                below.
+
+				chip = "config:16-31"
+				core  = "config:16-31"
+				domain = "config:0-3"
+				lpar = "config:0-15"
+				offset = "config:32-63"
+				vcpu = "config:16-31"
+
+               For example,
+
+		PM_PB_CYC =  "domain=1,offset=0x80,chip=?,lpar=0x0"
+
+		In this event, '?' after chip specifies that
+		this value will be provided by user while running this event.
+
 What:		/sys/bus/event_source/devices/hv_24x7/interface/catalog
 Date:		February 2014
 Contact:	Linux on PowerPC Developer List <[email protected]>

Documentation/ABI/testing/sysfs-bus-event_source-devices-hv_gpci

@@ -1,3 +1,34 @@
+What:           /sys/bus/event_source/devices/hv_gpci/format
+Date:           September 2020
+Contact:        Linux on PowerPC Developer List <[email protected]>
+Description:    Read-only. Attribute group to describe the magic bits
+                that go into perf_event_attr.config for a particular pmu.
+                (See ABI/testing/sysfs-bus-event_source-devices-format).
+
+                Each attribute under this group defines a bit range of the
+                perf_event_attr.config. All supported attributes are listed
+                below.
+
+				counter_info_version  = "config:16-23"
+				length  = "config:24-31"
+				partition_id  = "config:32-63"
+				request = "config:0-31"
+				sibling_part_id = "config:32-63"
+				hw_chip_id = "config:32-63"
+				offset = "config:32-63"
+				phys_processor_idx = "config:32-63"
+				secondary_index = "config:0-15"
+				starting_index = "config:32-63"
+
+               For example,
+
+		processor_core_utilization_instructions_completed = "request=0x94,
+					phys_processor_idx=?,counter_info_version=0x8,
+					length=8,offset=0x18"
+
+		In this event, '?' after phys_processor_idx specifies this value
+		this value will be provided by user while running this event.
+
 What:		/sys/bus/event_source/devices/hv_gpci/interface/collect_privileged
 Date:		February 2014
 Contact:	Linux on PowerPC Developer List <[email protected]>
@@ -41,3 +72,10 @@ Contact:	Linux on PowerPC Developer List <[email protected]>
 Description:
 		A number indicating the latest version of the gpci interface
 		that the kernel is aware of.
+
+What:		/sys/devices/hv_gpci/cpumask
+Date:		October 2020
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	read only
+		This sysfs file exposes the cpumask which is designated to make
+		HCALLs to retrieve hv-gpci pmu event counter data.

Documentation/powerpc/isa-versions.rst

@@ -7,6 +7,7 @@ Mapping of some CPU versions to relevant ISA versions.
 ========= ====================================================================
 CPU       Architecture version
 ========= ====================================================================
+Power10   Power ISA v3.1
 Power9    Power ISA v3.0B
 Power8    Power ISA v2.07
 Power7    Power ISA v2.06
@@ -32,6 +33,7 @@ Key Features
 ========== ==================
 CPU        VMX (aka. Altivec)
 ========== ==================
+Power10    Yes
 Power9     Yes
 Power8     Yes
 Power7     Yes
@@ -47,6 +49,7 @@ PPC970     Yes
 ========== ====
 CPU        VSX
 ========== ====
+Power10    Yes
 Power9     Yes
 Power8     Yes
 Power7     Yes
@@ -62,6 +65,7 @@ PPC970     No
 ========== ====================================
 CPU        Transactional Memory
 ========== ====================================
+Power10    No  (* see Power ISA v3.1, "Appendix A. Notes on the Removal of Transactional Memory from the Architecture")
 Power9     Yes (* see transactional_memory.txt)
 Power8     Yes
 Power7     No

Documentation/powerpc/ptrace.rst

@@ -46,6 +46,7 @@ features will have bits indicating whether there is support for::
   #define PPC_DEBUG_FEATURE_DATA_BP_RANGE		0x4
   #define PPC_DEBUG_FEATURE_DATA_BP_MASK		0x8
   #define PPC_DEBUG_FEATURE_DATA_BP_DAWR		0x10
+  #define PPC_DEBUG_FEATURE_DATA_BP_ARCH_31		0x20
 
 2. PTRACE_SETHWDEBUG
 

arch/Kconfig

@@ -420,6 +420,13 @@ config MMU_GATHER_NO_GATHER
 	bool
 	depends on MMU_GATHER_TABLE_FREE
 
+config ARCH_WANT_IRQS_OFF_ACTIVATE_MM
+	bool
+	help
+	  Temporary select until all architectures can be converted to have
+	  irqs disabled over activate_mm. Architectures that do IPI based TLB
+	  shootdowns should enable this.
+
 config ARCH_HAVE_NMI_SAFE_CMPXCHG
 	bool
 

arch/powerpc/Kconfig

@@ -59,7 +59,10 @@ config HAVE_SETUP_PER_CPU_AREA
 	def_bool PPC64
 
 config NEED_PER_CPU_EMBED_FIRST_CHUNK
-	def_bool PPC64
+	def_bool y if PPC64
+
+config NEED_PER_CPU_PAGE_FIRST_CHUNK
+	def_bool y if PPC64
 
 config NR_IRQS
 	int "Number of virtual interrupt numbers"
@@ -148,6 +151,7 @@ config PPC
 	select ARCH_USE_QUEUED_RWLOCKS		if PPC_QUEUED_SPINLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS	if PPC_QUEUED_SPINLOCKS
 	select ARCH_WANT_IPC_PARSE_VERSION
+	select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
 	select ARCH_WEAK_RELEASE_ACQUIRE
 	select BINFMT_ELF
 	select BUILDTIME_TABLE_SORT
@@ -964,7 +968,7 @@ config PPC_MEM_KEYS
 config PPC_SECURE_BOOT
 	prompt "Enable secure boot support"
 	bool
-	depends on PPC_POWERNV
+	depends on PPC_POWERNV || PPC_PSERIES
 	depends on IMA_ARCH_POLICY
 	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
 	help
@@ -984,6 +988,19 @@ config PPC_SECVAR_SYSFS
 	  read/write operations on these variables. Say Y if you have
 	  secure boot enabled and want to expose variables to userspace.
 
+config PPC_RTAS_FILTER
+	bool "Enable filtering of RTAS syscalls"
+	default y
+	depends on PPC_RTAS
+	help
+	  The RTAS syscall API has security issues that could be used to
+	  compromise system integrity. This option enforces restrictions on the
+	  RTAS calls and arguments passed by userspace programs to mitigate
+	  these issues.
+
+	  Say Y unless you know what you are doing and the filter is causing
+	  problems for you.
+
 endmenu
 
 config ISA_DMA_API

arch/powerpc/Makefile

@@ -264,7 +264,8 @@ KBUILD_CFLAGS += $(cpu-as-y)
 KBUILD_AFLAGS += $(aflags-y)
 KBUILD_CFLAGS += $(cflags-y)
 
-head-y				:= arch/powerpc/kernel/head_$(BITS).o
+head-$(CONFIG_PPC64)		:= arch/powerpc/kernel/head_64.o
+head-$(CONFIG_PPC_BOOK3S_32)	:= arch/powerpc/kernel/head_book3s_32.o
 head-$(CONFIG_PPC_8xx)		:= arch/powerpc/kernel/head_8xx.o
 head-$(CONFIG_40x)		:= arch/powerpc/kernel/head_40x.o
 head-$(CONFIG_44x)		:= arch/powerpc/kernel/head_44x.o

arch/powerpc/Makefile.postlink

@@ -18,7 +18,7 @@ quiet_cmd_relocs_check = CHKREL  $@
 ifdef CONFIG_PPC_BOOK3S_64
       cmd_relocs_check =						\
 	$(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/relocs_check.sh "$(OBJDUMP)" "$(NM)" "$@" ; \
-	$(BASH) $(srctree)/arch/powerpc/tools/unrel_branch_check.sh "$(OBJDUMP)" "$@"
+	$(BASH) $(srctree)/arch/powerpc/tools/unrel_branch_check.sh "$(OBJDUMP)" "$(NM)" "$@"
 else
       cmd_relocs_check =						\
 	$(CONFIG_SHELL) $(srctree)/arch/powerpc/tools/relocs_check.sh "$(OBJDUMP)" "$(NM)" "$@"

arch/powerpc/boot/Makefile

@@ -7,7 +7,7 @@
 # Based on coffboot by Paul Mackerras
 # Simplified for ppc64 by Todd Inglett
 #
-# NOTE:	this code is built for 32 bit in ELF32 format even though
+# NOTE:	this code may be built for 32 bit in ELF32 format even though
 #	it packages a 64 bit kernel.  We do this to simplify the
 #	bootloader and increase compatibility with OpenFirmware.
 #

arch/powerpc/boot/dts/fsl/t1024rdb.dts

@@ -161,7 +161,6 @@
 			rtc@68 {
 				compatible = "dallas,ds1339";
 				reg = <0x68>;
-				interrupts = <0x1 0x1 0 0>;
 			};
 		};