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Message-Id: <20250213040934.3245750-5-anshuman.khandual@arm.com>
Date: Thu, 13 Feb 2025 09:39:34 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-mm@...ck.org
Cc: steven.price@....com,
christophe.leroy@...roup.eu,
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 4/4] mm: Rename GENERIC_PTDUMP and PTDUMP_CORE
Platforms subscribe into generic ptdump implementation via GENERIC_PTDUMP.
But generic ptdump gets enabled via PTDUMP_CORE. These configs combination
is confusing as they sound very similar and does not differentiate between
platform's feature subscription and feature enablement for ptdump. Rename
the configs as ARCH_HAS_PTDUMP and PTDUMP making it more clear and improve
readability.
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>
---
Documentation/arch/arm64/ptdump.rst | 4 ++--
arch/arm64/Kconfig | 2 +-
arch/arm64/include/asm/ptdump.h | 4 ++--
arch/arm64/kvm/Kconfig | 4 ++--
arch/arm64/mm/Makefile | 2 +-
arch/powerpc/Kconfig | 2 +-
arch/powerpc/configs/mpc885_ads_defconfig | 2 +-
arch/powerpc/mm/Makefile | 2 +-
arch/riscv/Kconfig | 2 +-
arch/riscv/mm/Makefile | 2 +-
arch/s390/Kconfig | 2 +-
arch/s390/mm/Makefile | 2 +-
arch/x86/Kconfig | 2 +-
arch/x86/Kconfig.debug | 2 +-
arch/x86/mm/Makefile | 2 +-
mm/Kconfig.debug | 12 ++++++------
mm/Makefile | 2 +-
17 files changed, 25 insertions(+), 25 deletions(-)
diff --git a/Documentation/arch/arm64/ptdump.rst b/Documentation/arch/arm64/ptdump.rst
index 5dcfc5d7cddf..a2e527377da3 100644
--- a/Documentation/arch/arm64/ptdump.rst
+++ b/Documentation/arch/arm64/ptdump.rst
@@ -22,8 +22,8 @@ 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_ARCH_HAS_PTDUMP=y
+ CONFIG_PTDUMP=y
CONFIG_PTDUMP_DEBUGFS=y
mount -t debugfs nodev /sys/kernel/debug
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index fcdd0ed3eca8..045d24d074a0 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -41,6 +41,7 @@ config ARM64
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_NONLEAF_PMD_YOUNG if ARM64_HAFT
+ select ARCH_HAS_PTDUMP
select ARCH_HAS_PTE_DEVMAP
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_HW_PTE_YOUNG
@@ -157,7 +158,6 @@ config ARM64
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_LIB_DEVMEM_IS_ALLOWED
select GENERIC_PCI_IOMAP
- select GENERIC_PTDUMP
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
diff --git a/arch/arm64/include/asm/ptdump.h b/arch/arm64/include/asm/ptdump.h
index 6cf4aae05219..b2931d1ae0fb 100644
--- a/arch/arm64/include/asm/ptdump.h
+++ b/arch/arm64/include/asm/ptdump.h
@@ -7,7 +7,7 @@
#include <linux/ptdump.h>
-#ifdef CONFIG_PTDUMP_CORE
+#ifdef CONFIG_PTDUMP
#include <linux/mm_types.h>
#include <linux/seq_file.h>
@@ -70,6 +70,6 @@ static inline void ptdump_debugfs_register(struct ptdump_info *info,
#else
static inline void note_page(struct ptdump_state *pt_st, unsigned long addr,
int level, u64 val) { }
-#endif /* CONFIG_PTDUMP_CORE */
+#endif /* CONFIG_PTDUMP */
#endif /* __ASM_PTDUMP_H */
diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig
index ead632ad01b4..096e45acadb2 100644
--- a/arch/arm64/kvm/Kconfig
+++ b/arch/arm64/kvm/Kconfig
@@ -71,8 +71,8 @@ config PTDUMP_STAGE2_DEBUGFS
depends on KVM
depends on DEBUG_KERNEL
depends on DEBUG_FS
- depends on GENERIC_PTDUMP
- select PTDUMP_CORE
+ depends on ARCH_HAS_PTDUMP
+ select PTDUMP
default n
help
Say Y here if you want to show the stage-2 kernel pagetables
diff --git a/arch/arm64/mm/Makefile b/arch/arm64/mm/Makefile
index fc92170a8f37..c26489cf96cd 100644
--- a/arch/arm64/mm/Makefile
+++ b/arch/arm64/mm/Makefile
@@ -5,7 +5,7 @@ obj-y := dma-mapping.o extable.o fault.o init.o \
context.o proc.o pageattr.o fixmap.o
obj-$(CONFIG_ARM64_CONTPTE) += contpte.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
+obj-$(CONFIG_PTDUMP) += ptdump.o
obj-$(CONFIG_PTDUMP_DEBUGFS) += ptdump_debugfs.o
obj-$(CONFIG_TRANS_TABLE) += trans_pgd.o
obj-$(CONFIG_TRANS_TABLE) += trans_pgd-asm.o
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 424f188e62d9..6f1ae41dcf85 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -148,6 +148,7 @@ config PPC
select ARCH_HAS_PHYS_TO_DMA
select ARCH_HAS_PMEM_API
select ARCH_HAS_PREEMPT_LAZY
+ select ARCH_HAS_PTDUMP
select ARCH_HAS_PTE_DEVMAP if PPC_BOOK3S_64
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
@@ -206,7 +207,6 @@ config PPC
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_PCI_IOMAP if PCI
- select GENERIC_PTDUMP
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_TIME_NS
diff --git a/arch/powerpc/configs/mpc885_ads_defconfig b/arch/powerpc/configs/mpc885_ads_defconfig
index 77306be62e9e..db005618690b 100644
--- a/arch/powerpc/configs/mpc885_ads_defconfig
+++ b/arch/powerpc/configs/mpc885_ads_defconfig
@@ -78,4 +78,4 @@ CONFIG_DEBUG_VM_PGTABLE=y
CONFIG_DETECT_HUNG_TASK=y
CONFIG_BDI_SWITCH=y
CONFIG_PPC_EARLY_DEBUG=y
-CONFIG_GENERIC_PTDUMP=y
+CONFIG_PTDUMP=y
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 0fe2f085c05a..8c1582b2987d 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -15,5 +15,5 @@ obj-$(CONFIG_NUMA) += numa.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
obj-$(CONFIG_NOT_COHERENT_CACHE) += dma-noncoherent.o
obj-$(CONFIG_PPC_COPRO_BASE) += copro_fault.o
-obj-$(CONFIG_PTDUMP_CORE) += ptdump/
+obj-$(CONFIG_PTDUMP) += ptdump/
obj-$(CONFIG_KASAN) += kasan/
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index c4cdba6460b8..5aef2aa4103c 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -43,6 +43,7 @@ config RISCV
select ARCH_HAS_PMEM_API
select ARCH_HAS_PREEMPT_LAZY
select ARCH_HAS_PREPARE_SYNC_CORE_CMD
+ select ARCH_HAS_PTDUMP
select ARCH_HAS_PTE_DEVMAP if 64BIT && MMU
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SET_DIRECT_MAP if MMU
@@ -112,7 +113,6 @@ config RISCV
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_LIB_DEVMEM_IS_ALLOWED
select GENERIC_PCI_IOMAP
- select GENERIC_PTDUMP
select GENERIC_SCHED_CLOCK
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL if MMU && 64BIT
diff --git a/arch/riscv/mm/Makefile b/arch/riscv/mm/Makefile
index cbe4d775ef56..b916a68d324a 100644
--- a/arch/riscv/mm/Makefile
+++ b/arch/riscv/mm/Makefile
@@ -19,7 +19,7 @@ obj-y += context.o
obj-y += pmem.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
+obj-$(CONFIG_PTDUMP) += ptdump.o
obj-$(CONFIG_KASAN) += kasan_init.o
ifdef CONFIG_KASAN
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 9c9ec08d78c7..dd9dd2f8e673 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -96,6 +96,7 @@ config S390
select ARCH_HAS_MEM_ENCRYPT
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_PREEMPT_LAZY
+ select ARCH_HAS_PTDUMP
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SCALED_CPUTIME
select ARCH_HAS_SET_DIRECT_MAP
@@ -163,7 +164,6 @@ config S390
select GENERIC_CPU_VULNERABILITIES
select GENERIC_ENTRY
select GENERIC_GETTIMEOFDAY
- select GENERIC_PTDUMP
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_TIME_NS
diff --git a/arch/s390/mm/Makefile b/arch/s390/mm/Makefile
index f6c2db7a8669..9726b91fe7e4 100644
--- a/arch/s390/mm/Makefile
+++ b/arch/s390/mm/Makefile
@@ -9,6 +9,6 @@ obj-y += page-states.o pageattr.o pgtable.o pgalloc.o extable.o
obj-$(CONFIG_CMM) += cmm.o
obj-$(CONFIG_DEBUG_VIRTUAL) += physaddr.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PTDUMP_CORE) += dump_pagetables.o
+obj-$(CONFIG_PTDUMP) += dump_pagetables.o
obj-$(CONFIG_PGSTE) += gmap.o
obj-$(CONFIG_PFAULT) += pfault.o
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 87198d957e2f..aa04757f7591 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -26,6 +26,7 @@ config X86_64
depends on 64BIT
# Options that are inherently 64-bit kernel only:
select ARCH_HAS_GIGANTIC_PAGE
+ select ARCH_HAS_PTDUMP
select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_PER_VMA_LOCK
select ARCH_SUPPORTS_HUGE_PFNMAP if TRANSPARENT_HUGEPAGE
@@ -174,7 +175,6 @@ config X86
select GENERIC_IRQ_RESERVATION_MODE
select GENERIC_IRQ_SHOW
select GENERIC_PENDING_IRQ if SMP
- select GENERIC_PTDUMP
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 1eb4d23cdaae..c95c3aaadf97 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
+ select PTDUMP
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/arch/x86/mm/Makefile b/arch/x86/mm/Makefile
index 690fbf48e853..e0c99a8760ca 100644
--- a/arch/x86/mm/Makefile
+++ b/arch/x86/mm/Makefile
@@ -39,7 +39,7 @@ CFLAGS_fault.o := -I $(src)/../include/asm/trace
obj-$(CONFIG_X86_32) += pgtable_32.o iomap_32.o
obj-$(CONFIG_HUGETLB_PAGE) += hugetlbpage.o
-obj-$(CONFIG_PTDUMP_CORE) += dump_pagetables.o
+obj-$(CONFIG_PTDUMP) += dump_pagetables.o
obj-$(CONFIG_PTDUMP_DEBUGFS) += debug_pagetables.o
obj-$(CONFIG_HIGHMEM) += highmem_32.o
diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug
index c08406760d29..df657c021a18 100644
--- a/mm/Kconfig.debug
+++ b/mm/Kconfig.debug
@@ -186,9 +186,9 @@ config ARCH_HAS_DEBUG_WX
config DEBUG_WX
bool "Warn on W+X mappings at boot"
depends on ARCH_HAS_DEBUG_WX
- depends on GENERIC_PTDUMP
+ depends on ARCH_HAS_PTDUMP
depends on MMU
- select PTDUMP_CORE
+ select PTDUMP
help
Generate a warning if any W+X mappings are found at boot.
@@ -213,19 +213,19 @@ config DEBUG_WX
If in doubt, say "Y".
-config GENERIC_PTDUMP
+config ARCH_HAS_PTDUMP
depends on MMU
bool
-config PTDUMP_CORE
+config PTDUMP
bool
config PTDUMP_DEBUGFS
bool "Export kernel pagetable layout to userspace via debugfs"
depends on DEBUG_KERNEL
depends on DEBUG_FS
- depends on GENERIC_PTDUMP
- select PTDUMP_CORE
+ depends on ARCH_HAS_PTDUMP
+ select PTDUMP
help
Say Y here if you want to show the kernel pagetable layout in a
debugfs file. This information is only useful for kernel developers
diff --git a/mm/Makefile b/mm/Makefile
index 850386a67b3e..26dfecd4d396 100644
--- a/mm/Makefile
+++ b/mm/Makefile
@@ -138,7 +138,7 @@ obj-$(CONFIG_ZONE_DEVICE) += memremap.o
obj-$(CONFIG_HMM_MIRROR) += hmm.o
obj-$(CONFIG_MEMFD_CREATE) += memfd.o
obj-$(CONFIG_MAPPING_DIRTY_HELPERS) += mapping_dirty_helpers.o
-obj-$(CONFIG_PTDUMP_CORE) += ptdump.o
+obj-$(CONFIG_PTDUMP) += ptdump.o
obj-$(CONFIG_PAGE_REPORTING) += page_reporting.o
obj-$(CONFIG_IO_MAPPING) += io-mapping.o
obj-$(CONFIG_HAVE_BOOTMEM_INFO_NODE) += bootmem_info.o
--
2.25.1
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