From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com> Cc: "Christophe Leroy" <christophe.leroy@csgroup.eu>, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "Pali Rohár" <pali@kernel.org> Subject: [PATCH v1] powerpc/64: Set default CPU in Kconfig Date: Wed, 7 Dec 2022 14:38:40 +0100 [thread overview] Message-ID: <3fd60c2d8a28668a42b766b18362a526ef47e757.1670420281.git.christophe.leroy@csgroup.eu> (raw) Since 0069f3d14e7a ("powerpc/64e: Tie PPC_BOOK3E_64 to PPC_E500MC"), the only possible BOOK3E/64 are E500, so no need of a default CPU over the E5500. When the user selects book3e, he must have a e500 compatible compiler, and it won't work anymore with the default -mcpu=power64, see commit d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12 (unrecognized opcode: `wrteei')") For book3s/64, replace GENERIC_CPU by POWERPC64_CPU to match the PPC32 POWERPC_CPU, and set a default mpcu value in Kconfig directly. When a user selects a particular CPU, he must ensure his compiler has the requested capability. Therefore, remove hidden fallback, instead offer user the possibility to say he wants to use toolchain default. Reported-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- arch/powerpc/Makefile | 22 +++++----------------- arch/powerpc/platforms/Kconfig.cputype | 12 +++++++----- 2 files changed, 12 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index dc4cbf0a5ca9..bf5f0a998273 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -146,19 +146,6 @@ CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) -ifdef CONFIG_PPC_BOOK3S_64 -ifdef CONFIG_CPU_LITTLE_ENDIAN -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 -else -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 -endif -CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power10, \ - $(call cc-option,-mtune=power9, \ - $(call cc-option,-mtune=power8))) -else ifdef CONFIG_PPC_BOOK3E_64 -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 -endif - ifdef CONFIG_FUNCTION_TRACER CC_FLAGS_FTRACE := -pg ifdef CONFIG_MPROFILE_KERNEL @@ -166,11 +153,12 @@ CC_FLAGS_FTRACE += -mprofile-kernel endif endif -CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) -AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) +CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) +AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) -CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) -CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) +CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10, \ + $(call cc-option,-mtune=power9, \ + $(call cc-option,-mtune=power8))) asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 9563336e3348..31cea2eeb59e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -118,19 +118,18 @@ endchoice choice prompt "CPU selection" - default GENERIC_CPU help This will create a kernel which is optimised for a particular CPU. The resulting kernel may not run on other CPUs, so use this with care. If unsure, select Generic. -config GENERIC_CPU +config POWERPC64_CPU bool "Generic (POWER5 and PowerPC 970 and above)" depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN select PPC_64S_HASH_MMU -config GENERIC_CPU +config POWERPC64_CPU bool "Generic (POWER8 and above)" depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN select ARCH_HAS_FAST_MULTIPLIER @@ -233,13 +232,12 @@ config E500MC_CPU config TOOLCHAIN_DEFAULT_CPU bool "Rely on the toolchain's implicit default CPU" - depends on PPC32 endchoice config TARGET_CPU_BOOL bool - default !GENERIC_CPU && !TOOLCHAIN_DEFAULT_CPU + default !TOOLCHAIN_DEFAULT_CPU config TARGET_CPU string @@ -251,6 +249,10 @@ config TARGET_CPU default "power8" if POWER8_CPU default "power9" if POWER9_CPU default "power10" if POWER10_CPU + default "e500mc64" if E5500_CPU + default "e6500" if E6500_CPU + default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN + default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN default "405" if 405_CPU default "440" if 440_CPU default "464" if 464_CPU -- 2.38.1
WARNING: multiple messages have this Message-ID (diff)
From: Christophe Leroy <christophe.leroy@csgroup.eu> To: Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com> Cc: "Pali Rohár" <pali@kernel.org>, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org Subject: [PATCH v1] powerpc/64: Set default CPU in Kconfig Date: Wed, 7 Dec 2022 14:38:40 +0100 [thread overview] Message-ID: <3fd60c2d8a28668a42b766b18362a526ef47e757.1670420281.git.christophe.leroy@csgroup.eu> (raw) Since 0069f3d14e7a ("powerpc/64e: Tie PPC_BOOK3E_64 to PPC_E500MC"), the only possible BOOK3E/64 are E500, so no need of a default CPU over the E5500. When the user selects book3e, he must have a e500 compatible compiler, and it won't work anymore with the default -mcpu=power64, see commit d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12 (unrecognized opcode: `wrteei')") For book3s/64, replace GENERIC_CPU by POWERPC64_CPU to match the PPC32 POWERPC_CPU, and set a default mpcu value in Kconfig directly. When a user selects a particular CPU, he must ensure his compiler has the requested capability. Therefore, remove hidden fallback, instead offer user the possibility to say he wants to use toolchain default. Reported-by: Pali Rohár <pali@kernel.org> Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> --- arch/powerpc/Makefile | 22 +++++----------------- arch/powerpc/platforms/Kconfig.cputype | 12 +++++++----- 2 files changed, 12 insertions(+), 22 deletions(-) diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile index dc4cbf0a5ca9..bf5f0a998273 100644 --- a/arch/powerpc/Makefile +++ b/arch/powerpc/Makefile @@ -146,19 +146,6 @@ CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD)) CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata) -ifdef CONFIG_PPC_BOOK3S_64 -ifdef CONFIG_CPU_LITTLE_ENDIAN -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8 -else -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4 -endif -CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power10, \ - $(call cc-option,-mtune=power9, \ - $(call cc-option,-mtune=power8))) -else ifdef CONFIG_PPC_BOOK3E_64 -CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64 -endif - ifdef CONFIG_FUNCTION_TRACER CC_FLAGS_FTRACE := -pg ifdef CONFIG_MPROFILE_KERNEL @@ -166,11 +153,12 @@ CC_FLAGS_FTRACE += -mprofile-kernel endif endif -CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) -AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU)) +CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) +AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU) -CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64) -CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU)) +CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10, \ + $(call cc-option,-mtune=power9, \ + $(call cc-option,-mtune=power8))) asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1) diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 9563336e3348..31cea2eeb59e 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -118,19 +118,18 @@ endchoice choice prompt "CPU selection" - default GENERIC_CPU help This will create a kernel which is optimised for a particular CPU. The resulting kernel may not run on other CPUs, so use this with care. If unsure, select Generic. -config GENERIC_CPU +config POWERPC64_CPU bool "Generic (POWER5 and PowerPC 970 and above)" depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN select PPC_64S_HASH_MMU -config GENERIC_CPU +config POWERPC64_CPU bool "Generic (POWER8 and above)" depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN select ARCH_HAS_FAST_MULTIPLIER @@ -233,13 +232,12 @@ config E500MC_CPU config TOOLCHAIN_DEFAULT_CPU bool "Rely on the toolchain's implicit default CPU" - depends on PPC32 endchoice config TARGET_CPU_BOOL bool - default !GENERIC_CPU && !TOOLCHAIN_DEFAULT_CPU + default !TOOLCHAIN_DEFAULT_CPU config TARGET_CPU string @@ -251,6 +249,10 @@ config TARGET_CPU default "power8" if POWER8_CPU default "power9" if POWER9_CPU default "power10" if POWER10_CPU + default "e500mc64" if E5500_CPU + default "e6500" if E6500_CPU + default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN + default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN default "405" if 405_CPU default "440" if 440_CPU default "464" if 464_CPU -- 2.38.1
next reply other threads:[~2022-12-07 13:39 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-12-07 13:38 Christophe Leroy [this message] 2022-12-07 13:38 ` [PATCH v1] powerpc/64: Set default CPU in Kconfig Christophe Leroy 2022-12-08 19:13 ` Pali Rohár 2022-12-08 19:13 ` Pali Rohár 2022-12-15 20:42 ` Pali Rohár 2022-12-15 20:42 ` Pali Rohár 2022-12-16 19:15 ` Segher Boessenkool 2022-12-16 19:15 ` Segher Boessenkool 2022-12-16 22:23 ` Pali Rohár 2022-12-16 22:23 ` Pali Rohár 2022-12-16 23:02 ` Segher Boessenkool 2022-12-16 23:02 ` Segher Boessenkool
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