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Message-Id: <20241217034807.2541349-1-anshuman.khandual@arm.com> Date: Tue, 17 Dec 2024 09:18:07 +0530 From: Anshuman Khandual <anshuman.khandual@....com> To: linux-mm@...ck.org Cc: steven.price@....com, Anshuman Khandual <anshuman.khandual@....com>, Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>, Jonathan Corbet <corbet@....net>, Marc Zyngier <maz@...nel.org>, Michael Ellerman <mpe@...erman.id.au>, Nicholas Piggin <npiggin@...il.com>, Paul Walmsley <paul.walmsley@...ive.com>, Palmer Dabbelt <palmer@...belt.com>, Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>, Andrew Morton <akpm@...ux-foundation.org>, linux-arm-kernel@...ts.infradead.org, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org, kvmarm@...ts.linux.dev, linuxppc-dev@...ts.ozlabs.org, linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org Subject: [PATCH] mm/ptdump: Drop GENERIC_PTDUMP GENERIC_PTDUMP does not guard any code but instead just used for platform's subscription into core ptdump defined under PTDUMP_CORE, which is selected. Instead use PTDUMP_CORE for platform subscription and drop GENERIC_PTDUMP. Cc: Catalin Marinas <catalin.marinas@....com> Cc: Will Deacon <will@...nel.org> Cc: Jonathan Corbet <corbet@....net> Cc: Marc Zyngier <maz@...nel.org> Cc: Michael Ellerman <mpe@...erman.id.au> Cc: Nicholas Piggin <npiggin@...il.com> Cc: Paul Walmsley <paul.walmsley@...ive.com> Cc: Palmer Dabbelt <palmer@...belt.com> Cc: Heiko Carstens <hca@...ux.ibm.com> Cc: Vasily Gorbik <gor@...ux.ibm.com> Cc: Thomas Gleixner <tglx@...utronix.de> Cc: Ingo Molnar <mingo@...hat.com> Cc: Andrew Morton <akpm@...ux-foundation.org> Cc: linux-arm-kernel@...ts.infradead.org Cc: linux-doc@...r.kernel.org Cc: linux-kernel@...r.kernel.org Cc: kvmarm@...ts.linux.dev Cc: linuxppc-dev@...ts.ozlabs.org Cc: linux-riscv@...ts.infradead.org Cc: linux-s390@...r.kernel.org Cc: linux-mm@...ck.org Signed-off-by: Anshuman Khandual <anshuman.khandual@....com> --- This patch applies on v6.13-rc3 and has been tested on arm64, although it also clears build tests on impacted platforms. Documentation/arch/arm64/ptdump.rst | 1 - arch/arm64/Kconfig | 2 +- arch/arm64/kvm/Kconfig | 3 +-- arch/powerpc/Kconfig | 2 +- arch/powerpc/configs/mpc885_ads_defconfig | 1 - arch/riscv/Kconfig | 2 +- arch/s390/Kconfig | 2 +- arch/x86/Kconfig | 2 +- arch/x86/Kconfig.debug | 2 +- kernel/configs/debug.config | 1 - mm/Kconfig.debug | 8 ++------ 11 files changed, 9 insertions(+), 17 deletions(-) diff --git a/Documentation/arch/arm64/ptdump.rst b/Documentation/arch/arm64/ptdump.rst index 5dcfc5d7cddf..61ca040a885b 100644 --- a/Documentation/arch/arm64/ptdump.rst +++ b/Documentation/arch/arm64/ptdump.rst @@ -22,7 +22,6 @@ offlining of memory being accessed by the ptdump code. In order to dump the kernel page tables, enable the following configurations and mount debugfs:: - CONFIG_GENERIC_PTDUMP=y CONFIG_PTDUMP_CORE=y CONFIG_PTDUMP_DEBUGFS=y diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 100570a048c5..b5479c8b454c 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -154,7 +154,7 @@ config ARM64 select GENERIC_IRQ_SHOW_LEVEL select GENERIC_LIB_DEVMEM_IS_ALLOWED select GENERIC_PCI_IOMAP - select GENERIC_PTDUMP + select PTDUMP_CORE select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index ead632ad01b4..fe17d7f5b061 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -71,8 +71,7 @@ config PTDUMP_STAGE2_DEBUGFS depends on KVM depends on DEBUG_KERNEL depends on DEBUG_FS - depends on GENERIC_PTDUMP - select PTDUMP_CORE + depends on PTDUMP_CORE default n help Say Y here if you want to show the stage-2 kernel pagetables diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index a0ce777f9706..c716f8df10de 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -203,7 +203,7 @@ config PPC select GENERIC_IRQ_SHOW select GENERIC_IRQ_SHOW_LEVEL select GENERIC_PCI_IOMAP if PCI - select GENERIC_PTDUMP + select PTDUMP_CORE select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select GENERIC_VDSO_TIME_NS diff --git a/arch/powerpc/configs/mpc885_ads_defconfig b/arch/powerpc/configs/mpc885_ads_defconfig index 77306be62e9e..ea6f836407d2 100644 --- a/arch/powerpc/configs/mpc885_ads_defconfig +++ b/arch/powerpc/configs/mpc885_ads_defconfig @@ -78,4 +78,3 @@ CONFIG_DEBUG_VM_PGTABLE=y CONFIG_DETECT_HUNG_TASK=y CONFIG_BDI_SWITCH=y CONFIG_PPC_EARLY_DEBUG=y -CONFIG_GENERIC_PTDUMP=y diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index d4a7ca0388c0..05f969729e72 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -111,7 +111,7 @@ config RISCV select GENERIC_IRQ_SHOW_LEVEL select GENERIC_LIB_DEVMEM_IS_ALLOWED select GENERIC_PCI_IOMAP - select GENERIC_PTDUMP if MMU + select PTDUMP_CORE if MMU select GENERIC_SCHED_CLOCK select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL if MMU && 64BIT diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 0077969170e8..0e19fe547d84 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -155,7 +155,7 @@ config S390 select GENERIC_CPU_VULNERABILITIES select GENERIC_ENTRY select GENERIC_GETTIMEOFDAY - select GENERIC_PTDUMP + select PTDUMP_CORE select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select GENERIC_VDSO_TIME_NS diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 9d7bd0ae48c4..d84cb2ac93ac 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -173,7 +173,7 @@ config X86 select GENERIC_IRQ_RESERVATION_MODE select GENERIC_IRQ_SHOW select GENERIC_PENDING_IRQ if SMP - select GENERIC_PTDUMP + select PTDUMP_CORE select GENERIC_SMP_IDLE_THREAD select GENERIC_TIME_VSYSCALL select GENERIC_GETTIMEOFDAY diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 74777a97e394..198d7f090b98 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -59,7 +59,7 @@ config EARLY_PRINTK_USB_XDBC config EFI_PGT_DUMP bool "Dump the EFI pagetable" depends on EFI - select PTDUMP_CORE + depends on PTDUMP_CORE help Enable this if you want to dump the EFI page table before enabling virtual mode. This can be used to debug miscellaneous diff --git a/kernel/configs/debug.config b/kernel/configs/debug.config index 20552f163930..8aafd050b754 100644 --- a/kernel/configs/debug.config +++ b/kernel/configs/debug.config @@ -73,7 +73,6 @@ CONFIG_DEBUG_VM=y CONFIG_DEBUG_VM_PGFLAGS=y CONFIG_DEBUG_VM_RB=y CONFIG_DEBUG_VM_VMACACHE=y -CONFIG_GENERIC_PTDUMP=y CONFIG_KASAN=y CONFIG_KASAN_GENERIC=y CONFIG_KASAN_INLINE=y diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index 41a58536531d..b206e5a11f96 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -187,7 +187,7 @@ config DEBUG_WX bool "Warn on W+X mappings at boot" depends on ARCH_HAS_DEBUG_WX depends on MMU - select PTDUMP_CORE + depends on PTDUMP_CORE help Generate a warning if any W+X mappings are found at boot. @@ -212,9 +212,6 @@ config DEBUG_WX If in doubt, say "Y". -config GENERIC_PTDUMP - bool - config PTDUMP_CORE bool @@ -222,8 +219,7 @@ config PTDUMP_DEBUGFS bool "Export kernel pagetable layout to userspace via debugfs" depends on DEBUG_KERNEL depends on DEBUG_FS - depends on GENERIC_PTDUMP - select PTDUMP_CORE + depends on PTDUMP_CORE help Say Y here if you want to show the kernel pagetable layout in a debugfs file. This information is only useful for kernel developers -- 2.30.2
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