Automatic merge of 'next-test' into merge-test (2023-08-15 14:01)

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

@@ -80,3 +80,163 @@ 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.
+
+What:		/sys/devices/hv_gpci/interface/processor_bus_topology
+Date:		July 2023
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	admin read only
+		This sysfs file exposes the system topology information by making HCALL
+		H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value
+		PROCESSOR_BUS_TOPOLOGY(0xD0).
+
+		* This sysfs file will be created only for power10 and above platforms.
+
+		* User needs root privileges to read data from this sysfs file.
+
+		* This sysfs file will be created, only when the HCALL returns "H_SUCCESS",
+		  "H_AUTHORITY" or "H_PARAMETER" as the return type.
+
+		  HCALL with return error type "H_AUTHORITY" can be resolved during
+		  runtime by setting "Enable Performance Information Collection" option.
+
+		* The end user reading this sysfs file must decode the content as per
+		  underlying platform/firmware.
+
+		Possible error codes while reading this sysfs file:
+
+		* "-EPERM" : Partition is not permitted to retrieve performance information,
+			    required to set "Enable Performance Information Collection" option.
+
+		* "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+			   or because of some hardware error. Refer to getPerfCountInfo documentation for
+			   more information.
+
+		* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What:		/sys/devices/hv_gpci/interface/processor_config
+Date:		July 2023
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	admin read only
+		This sysfs file exposes the system topology information by making HCALL
+		H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value
+		PROCESSOR_CONFIG(0x90).
+
+		* This sysfs file will be created only for power10 and above platforms.
+
+		* User needs root privileges to read data from this sysfs file.
+
+		* This sysfs file will be created, only when the HCALL returns "H_SUCCESS",
+		  "H_AUTHORITY" or "H_PARAMETER" as the return type.
+
+		  HCALL with return error type "H_AUTHORITY" can be resolved during
+		  runtime by setting "Enable Performance Information Collection" option.
+
+		* The end user reading this sysfs file must decode the content as per
+		  underlying platform/firmware.
+
+		Possible error codes while reading this sysfs file:
+
+		* "-EPERM" : Partition is not permitted to retrieve performance information,
+			    required to set "Enable Performance Information Collection" option.
+
+		* "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+			   or because of some hardware error. Refer to getPerfCountInfo documentation for
+			   more information.
+
+		* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What:		/sys/devices/hv_gpci/interface/affinity_domain_via_virtual_processor
+Date:		July 2023
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	admin read only
+		This sysfs file exposes the system topology information by making HCALL
+		H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value
+		AFFINITY_DOMAIN_INFORMATION_BY_VIRTUAL_PROCESSOR(0xA0).
+
+		* This sysfs file will be created only for power10 and above platforms.
+
+		* User needs root privileges to read data from this sysfs file.
+
+		* This sysfs file will be created, only when the HCALL returns "H_SUCCESS",
+		  "H_AUTHORITY" or "H_PARAMETER" as the return type.
+
+		  HCALL with return error type "H_AUTHORITY" can be resolved during
+		  runtime by setting "Enable Performance Information Collection" option.
+
+		* The end user reading this sysfs file must decode the content as per
+		  underlying platform/firmware.
+
+		Possible error codes while reading this sysfs file:
+
+		* "-EPERM" : Partition is not permitted to retrieve performance information,
+			    required to set "Enable Performance Information Collection" option.
+
+		* "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+			   or because of some hardware error. Refer to getPerfCountInfo documentation for
+			   more information.
+
+		* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What:		/sys/devices/hv_gpci/interface/affinity_domain_via_domain
+Date:		July 2023
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	admin read only
+		This sysfs file exposes the system topology information by making HCALL
+		H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value
+		AFFINITY_DOMAIN_INFORMATION_BY_DOMAIN(0xB0).
+
+		* This sysfs file will be created only for power10 and above platforms.
+
+		* User needs root privileges to read data from this sysfs file.
+
+		* This sysfs file will be created, only when the HCALL returns "H_SUCCESS",
+		  "H_AUTHORITY" or "H_PARAMETER" as the return type.
+
+		  HCALL with return error type "H_AUTHORITY" can be resolved during
+		  runtime by setting "Enable Performance Information Collection" option.
+
+		* The end user reading this sysfs file must decode the content as per
+		  underlying platform/firmware.
+
+		Possible error codes while reading this sysfs file:
+
+		* "-EPERM" : Partition is not permitted to retrieve performance information,
+			    required to set "Enable Performance Information Collection" option.
+
+		* "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+			   or because of some hardware error. Refer to getPerfCountInfo documentation for
+			   more information.
+
+		* "-EFBIG" : System information exceeds PAGE_SIZE.
+
+What:		/sys/devices/hv_gpci/interface/affinity_domain_via_partition
+Date:		July 2023
+Contact:	Linux on PowerPC Developer List <[email protected]>
+Description:	admin read only
+		This sysfs file exposes the system topology information by making HCALL
+		H_GET_PERF_COUNTER_INFO. The HCALL is made with counter request value
+		AFFINITY_DOMAIN_INFORMATION_BY_PARTITION(0xB1).
+
+		* This sysfs file will be created only for power10 and above platforms.
+
+		* User needs root privileges to read data from this sysfs file.
+
+		* This sysfs file will be created, only when the HCALL returns "H_SUCCESS",
+		  "H_AUTHORITY" or "H_PARAMETER" as the return type.
+
+		  HCALL with return error type "H_AUTHORITY" can be resolved during
+		  runtime by setting "Enable Performance Information Collection" option.
+
+		* The end user reading this sysfs file must decode the content as per
+		  underlying platform/firmware.
+
+		Possible error codes while reading this sysfs file:
+
+		* "-EPERM" : Partition is not permitted to retrieve performance information,
+			    required to set "Enable Performance Information Collection" option.
+
+		* "-EIO" : Can't retrieve system information because of invalid buffer length/invalid address
+			   or because of some hardware error. Refer to getPerfCountInfo documentation for
+			   more information.
+
+		* "-EFBIG" : System information exceeds PAGE_SIZE.

Documentation/ABI/testing/sysfs-devices-system-cpu

@@ -556,6 +556,7 @@ Description:	Control Symmetric Multi Threading (SMT)
 			 ================ =========================================
 			 "on"		  SMT is enabled
 			 "off"		  SMT is disabled
+			 "<N>"		  SMT is enabled with N threads per core.
 			 "forceoff"	  SMT is force disabled. Cannot be changed.
 			 "notsupported"   SMT is not supported by the CPU
 			 "notimplemented" SMT runtime toggling is not

Documentation/admin-guide/kernel-parameters.txt

@@ -3874,10 +3874,10 @@
 	nosmp		[SMP] Tells an SMP kernel to act as a UP kernel,
 			and disable the IO APIC.  legacy for "maxcpus=0".
 
-	nosmt		[KNL,MIPS,S390] Disable symmetric multithreading (SMT).
+	nosmt		[KNL,MIPS,PPC,S390] Disable symmetric multithreading (SMT).
 			Equivalent to smt=1.
 
-			[KNL,X86] Disable symmetric multithreading (SMT).
+			[KNL,X86,PPC] Disable symmetric multithreading (SMT).
 			nosmt=force: Force disable SMT, cannot be undone
 				     via the sysfs control file.
 

Documentation/powerpc/ptrace.rst

@@ -15,7 +15,7 @@ that's extendable and that covers both BookE and server processors, so
 that GDB doesn't need to special-case each of them. We added the
 following 3 new ptrace requests.
 
-1. PTRACE_PPC_GETHWDEBUGINFO
+1. PPC_PTRACE_GETHWDBGINFO
 ============================
 
 Query for GDB to discover the hardware debug features. The main info to
@@ -48,7 +48,7 @@ features will have bits indicating whether there is support for::
   #define PPC_DEBUG_FEATURE_DATA_BP_DAWR		0x10
   #define PPC_DEBUG_FEATURE_DATA_BP_ARCH_31		0x20
 
-2. PTRACE_SETHWDEBUG
+2. PPC_PTRACE_SETHWDEBUG
 
 Sets a hardware breakpoint or watchpoint, according to the provided structure::
 
@@ -88,7 +88,7 @@ that the BookE supports. COMEFROM breakpoints available in server processors
 are not contemplated, but that is out of the scope of this work.
 
 ptrace will return an integer (handle) uniquely identifying the breakpoint or
-watchpoint just created. This integer will be used in the PTRACE_DELHWDEBUG
+watchpoint just created. This integer will be used in the PPC_PTRACE_DELHWDEBUG
 request to ask for its removal. Return -ENOSPC if the requested breakpoint
 can't be allocated on the registers.
 
@@ -150,7 +150,7 @@ Some examples of using the structure to:
     p.addr2           = (uint64_t) end_range;
     p.condition_value = 0;
 
-3. PTRACE_DELHWDEBUG
+3. PPC_PTRACE_DELHWDEBUG
 
 Takes an integer which identifies an existing breakpoint or watchpoint
 (i.e., the value returned from PTRACE_SETHWDEBUG), and deletes the

arch/Kconfig

@@ -34,6 +34,9 @@ config ARCH_HAS_SUBPAGE_FAULTS
 config HOTPLUG_SMT
 	bool
 
+config SMT_NUM_THREADS_DYNAMIC
+	bool
+
 # Selected by HOTPLUG_CORE_SYNC_DEAD or HOTPLUG_CORE_SYNC_FULL
 config HOTPLUG_CORE_SYNC
 	bool

arch/powerpc/Kconfig

@@ -272,6 +272,8 @@ config PPC
 	select HAVE_SYSCALL_TRACEPOINTS
 	select HAVE_VIRT_CPU_ACCOUNTING
 	select HAVE_VIRT_CPU_ACCOUNTING_GEN
+	select HOTPLUG_SMT			if HOTPLUG_CPU
+	select SMT_NUM_THREADS_DYNAMIC
 	select HUGETLB_PAGE_SIZE_VARIABLE	if PPC_BOOK3S_64 && HUGETLB_PAGE
 	select IOMMU_HELPER			if PPC64
 	select IRQ_DOMAIN
@@ -1144,12 +1146,6 @@ config FSL_GTM
 	help
 	  Freescale General-purpose Timers support
 
-config PCI_8260
-	bool
-	depends on PCI && 8260
-	select PPC_INDIRECT_PCI
-	default y
-
 config FSL_RIO
 	bool "Freescale Embedded SRIO Controller support"
 	depends on RAPIDIO = y && HAVE_RAPIDIO

arch/powerpc/configs/pmac32_defconfig

@@ -176,8 +176,9 @@ CONFIG_MOUSE_APPLETOUCH=y
 # CONFIG_SERIO_I8042 is not set
 # CONFIG_SERIO_SERPORT is not set
 CONFIG_SERIAL_8250=m
-CONFIG_SERIAL_PMACZILOG=m
+CONFIG_SERIAL_PMACZILOG=y
 CONFIG_SERIAL_PMACZILOG_TTYS=y
+CONFIG_SERIAL_PMACZILOG_CONSOLE=y
 CONFIG_NVRAM=y
 CONFIG_I2C_CHARDEV=m
 CONFIG_APM_POWER=y

arch/powerpc/include/asm/8xx_immap.h

@@ -560,5 +560,7 @@ typedef struct immap {
 	cpm8xx_t	im_cpm;		/* Communication processor */
 } immap_t;
 
+extern immap_t __iomem *mpc8xx_immr;
+
 #endif /* __IMMAP_8XX__ */
 #endif /* __KERNEL__ */

arch/powerpc/include/asm/Kbuild

@@ -3,7 +3,6 @@ generated-y += syscall_table_32.h
 generated-y += syscall_table_64.h
 generated-y += syscall_table_spu.h
 generic-y += agp.h
-generic-y += export.h
 generic-y += kvm_types.h
 generic-y += mcs_spinlock.h
 generic-y += qrwlock.h

arch/powerpc/include/asm/cpm2.h

@@ -1080,6 +1080,9 @@ typedef struct im_idma {
 #define FCC2_MEM_OFFSET FCC_MEM_OFFSET(1)
 #define FCC3_MEM_OFFSET FCC_MEM_OFFSET(2)
 
+/* Pipeline Maximum Depth */
+#define MPC82XX_BCR_PLDP 0x00800000
+
 /* Clocks and GRG's */
 
 enum cpm_clk_dir {

arch/powerpc/include/asm/fs_pd.h

@@ -14,28 +14,6 @@
 #include <sysdev/fsl_soc.h>
 #include <asm/time.h>
 
-#ifdef CONFIG_CPM2
-#include <asm/cpm2.h>
-
-#if defined(CONFIG_8260)
-#include <asm/mpc8260.h>
-#endif
-
-#define cpm2_map(member) (&cpm2_immr->member)
-#define cpm2_map_size(member, size) (&cpm2_immr->member)
-#define cpm2_unmap(addr) do {} while(0)
-#endif
-
-#ifdef CONFIG_PPC_8xx
-#include <asm/8xx_immap.h>
-
-extern immap_t __iomem *mpc8xx_immr;
-
-#define immr_map(member) (&mpc8xx_immr->member)
-#define immr_map_size(member, size) (&mpc8xx_immr->member)
-#define immr_unmap(addr) do {} while (0)
-#endif
-
 static inline int uart_baudrate(void)
 {
         return get_baudrate();

arch/powerpc/include/asm/hw_breakpoint.h

@@ -18,6 +18,7 @@ struct arch_hw_breakpoint {
 	u16		len; /* length of the target data symbol */
 	u16		hw_len; /* length programmed in hw */
 	u8		flags;
+	bool		perf_single_step; /* temporarily uninstalled for a perf single step */
 };
 
 /* Note: Don't change the first 6 bits below as they are in the same order

arch/powerpc/include/asm/kfence.h

@@ -23,7 +23,7 @@ static inline bool arch_kfence_init_pool(void)
 #ifdef CONFIG_PPC64
 static inline bool kfence_protect_page(unsigned long addr, bool protect)
 {
-	struct page *page = virt_to_page(addr);
+	struct page *page = virt_to_page((void *)addr);
 
 	__kernel_map_pages(page, 1, !protect);
 

arch/powerpc/include/asm/nohash/32/pgtable.h

@@ -355,7 +355,7 @@ static inline int pte_young(pte_t pte)
 #define pmd_pfn(pmd)		(pmd_val(pmd) >> PAGE_SHIFT)
 #else
 #define pmd_page_vaddr(pmd)	\
-	((unsigned long)(pmd_val(pmd) & ~(PTE_TABLE_SIZE - 1)))
+	((const void *)(pmd_val(pmd) & ~(PTE_TABLE_SIZE - 1)))
 #define pmd_pfn(pmd)		(__pa(pmd_val(pmd)) >> PAGE_SHIFT)
 #endif
 

arch/powerpc/include/asm/nohash/64/pgtable.h

@@ -127,7 +127,7 @@ static inline pte_t pmd_pte(pmd_t pmd)
 #define	pmd_bad(pmd)		(!is_kernel_addr(pmd_val(pmd)) \
 				 || (pmd_val(pmd) & PMD_BAD_BITS))
 #define	pmd_present(pmd)	(!pmd_none(pmd))
-#define pmd_page_vaddr(pmd)	(pmd_val(pmd) & ~PMD_MASKED_BITS)
+#define pmd_page_vaddr(pmd)	((const void *)(pmd_val(pmd) & ~PMD_MASKED_BITS))
 extern struct page *pmd_page(pmd_t pmd);
 #define pmd_pfn(pmd)		(page_to_pfn(pmd_page(pmd)))