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[14.202.4.83]) by smtp.gmail.com with ESMTPSA id h10-20020a170902748a00b001a258041049sm14142470pll.32.2023.04.28.23.33.53 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 28 Apr 2023 23:34:08 -0700 (PDT) From: Nicholas Piggin To: Arnd Bergmann Cc: Nicholas Piggin , linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org, Vineet Gupta , linux-snps-arc@lists.infradead.org, Brian Cain , linux-hexagon@vger.kernel.org, Huacai Chen , loongarch@lists.linux.dev, Geert Uytterhoeven , linux-m68k@lists.linux-m68k.org, Michal Simek , Thomas Bogendoerfer , linux-mips@vger.kernel.org, Dinh Nguyen , Jonas Bonn , Stefan Kristiansson , Stafford Horne , linux-openrisc@vger.kernel.org, "James E.J. Bottomley" , Helge Deller , linux-parisc@vger.kernel.org, Paul Walmsley , Palmer Dabbelt , Albert Ou , linux-riscv@lists.infradead.org, Yoshinori Sato , Rich Felker , John Paul Adrian Glaubitz , linux-sh@vger.kernel.org, "David S. Miller" , sparclinux@vger.kernel.org, Richard Weinberger , Anton Ivanov , Johannes Berg , linux-um@lists.infradead.org, Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Kevin Hilman , Frederic Weisbecker Subject: [PATCH] Remove HAVE_VIRT_CPU_ACCOUNTING_GEN option Date: Sat, 29 Apr 2023 16:33:48 +1000 Message-Id: <20230429063348.125544-1-npiggin@gmail.com> X-Mailer: git-send-email 2.40.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230428_233412_903838_F12A64E5 X-CRM114-Status: GOOD ( 15.89 ) X-Spam-Score: -0.2 (/) X-Spam-Report: Spam detection software, running on the system "bombadil.infradead.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: This option was created in commit 554b0004d0ec4 ("vtime: Add HAVE_VIRT_CPU_ACCOUNTING_GEN Kconfig") for architectures to indicate they support the 64-bit cputime_t required for VIRT_CPU_ACCOUNTING_GEN [...] Content analysis details: (-0.2 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:62a listed in] [list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider [npiggin[at]gmail.com] -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-snps-arc@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Linux on Synopsys ARC Processors List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-snps-arc" Errors-To: linux-snps-arc-bounces+incoming=patchwork.ozlabs.org@lists.infradead.org This option was created in commit 554b0004d0ec4 ("vtime: Add HAVE_VIRT_CPU_ACCOUNTING_GEN Kconfig") for architectures to indicate they support the 64-bit cputime_t required for VIRT_CPU_ACCOUNTING_GEN. The cputime_t type has since been removed, so this doesn't have any meaning. Remove it. Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: Vineet Gupta Cc: linux-snps-arc@lists.infradead.org Cc: Brian Cain Cc: linux-hexagon@vger.kernel.org Cc: Huacai Chen Cc: loongarch@lists.linux.dev Cc: Geert Uytterhoeven Cc: linux-m68k@lists.linux-m68k.org Cc: Michal Simek Cc: Thomas Bogendoerfer Cc: linux-mips@vger.kernel.org Cc: Dinh Nguyen Cc: Jonas Bonn Cc: Stefan Kristiansson Cc: Stafford Horne Cc: linux-openrisc@vger.kernel.org Cc: "James E.J. Bottomley" Cc: Helge Deller Cc: linux-parisc@vger.kernel.org Cc: Paul Walmsley Cc: Palmer Dabbelt Cc: Albert Ou Cc: linux-riscv@lists.infradead.org Cc: Yoshinori Sato Cc: Rich Felker Cc: John Paul Adrian Glaubitz Cc: linux-sh@vger.kernel.org Cc: "David S. Miller" Cc: sparclinux@vger.kernel.org Cc: Richard Weinberger Cc: Anton Ivanov Cc: Johannes Berg Cc: linux-um@lists.infradead.org Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: Dave Hansen Cc: x86@kernel.org Cc: "H. Peter Anvin" Cc: Kevin Hilman Cc: Frederic Weisbecker Signed-off-by: Nicholas Piggin Acked-by: Palmer Dabbelt # RISC-V --- Hi, Could we tidy this? I don't know what tree it can go in, timers, sched, asm-generic, probably doesn't matter. The only thing this actually does is gate VIRT_CPU_ACCOUNTING_GEN and NO_HZ_FULL so if your arch has some other issue that requires this then the documentation needs to change. Any concerns from the archs? I.e., 32-bit that does *not* define HAVE_VIRT_CPU_ACCOUNTING_GEN which looks to be: arc hexagon loongarch 32-bit with SMP m68k microblaze mips 32-bit with SMP nios2 openrisc parisc 32-bit riscv 32-bit sh sparc 32-bit um 32-bit x86 32-bit Thanks, Nick -- arch/Kconfig | 11 ----------- arch/arm/Kconfig | 1 - arch/csky/Kconfig | 1 - arch/loongarch/Kconfig | 1 - arch/mips/Kconfig | 1 - arch/powerpc/Kconfig | 1 - arch/xtensa/Kconfig | 1 - init/Kconfig | 1 - kernel/time/Kconfig | 2 -- 9 files changed, 20 deletions(-) diff --git a/arch/Kconfig b/arch/Kconfig index 205fd23e0cad..b77b41d25e40 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -869,17 +869,6 @@ config HAVE_VIRT_CPU_ACCOUNTING_IDLE config ARCH_HAS_SCALED_CPUTIME bool -config HAVE_VIRT_CPU_ACCOUNTING_GEN - bool - default y if 64BIT - help - With VIRT_CPU_ACCOUNTING_GEN, cputime_t becomes 64-bit. - Before enabling this option, arch code must be audited - to ensure there are no races in concurrent read/write of - cputime_t. For example, reading/writing 64-bit cputime_t on - some 32-bit arches may require multiple accesses, so proper - locking is needed to protect against concurrent accesses. - config HAVE_IRQ_TIME_ACCOUNTING bool help diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 0fb4b218f665..9c05f25db4e4 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -123,7 +123,6 @@ config ARM select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS select HAVE_UID16 - select HAVE_VIRT_CPU_ACCOUNTING_GEN select IRQ_FORCED_THREADING select MODULES_USE_ELF_REL select NEED_DMA_MAP_STATE diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig index 00379a843c37..dd1decc2a22d 100644 --- a/arch/csky/Kconfig +++ b/arch/csky/Kconfig @@ -73,7 +73,6 @@ config CSKY select HAVE_ARCH_MMAP_RND_BITS select HAVE_ARCH_SECCOMP_FILTER select HAVE_CONTEXT_TRACKING_USER - select HAVE_VIRT_CPU_ACCOUNTING_GEN select HAVE_DEBUG_BUGVERBOSE select HAVE_DEBUG_KMEMLEAK select HAVE_DYNAMIC_FTRACE diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index f44f6ea54e46..7dc71c89bfae 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -122,7 +122,6 @@ config LOONGARCH select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS select HAVE_TIF_NOHZ - select HAVE_VIRT_CPU_ACCOUNTING_GEN if !SMP select IRQ_FORCED_THREADING select IRQ_LOONGARCH_CPU select MMU_GATHER_MERGE_VMAS if MMU diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index c2f5498d207f..d84cb8bbee53 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -87,7 +87,6 @@ config MIPS select HAVE_SPARSE_SYSCALL_NR select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS - select HAVE_VIRT_CPU_ACCOUNTING_GEN if 64BIT || !SMP select IRQ_FORCED_THREADING select ISA if EISA select MODULES_USE_ELF_REL if MODULES diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index acffffbd5d77..185195f349d9 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -271,7 +271,6 @@ config PPC select HAVE_STATIC_CALL if PPC32 select HAVE_SYSCALL_TRACEPOINTS select HAVE_VIRT_CPU_ACCOUNTING - select HAVE_VIRT_CPU_ACCOUNTING_GEN select HUGETLB_PAGE_SIZE_VARIABLE if PPC_BOOK3S_64 && HUGETLB_PAGE select IOMMU_HELPER if PPC64 select IRQ_DOMAIN diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig index 3c6e5471f025..04f1399d9ce8 100644 --- a/arch/xtensa/Kconfig +++ b/arch/xtensa/Kconfig @@ -47,7 +47,6 @@ config XTENSA select HAVE_PERF_EVENTS select HAVE_STACKPROTECTOR select HAVE_SYSCALL_TRACEPOINTS - select HAVE_VIRT_CPU_ACCOUNTING_GEN select IRQ_DOMAIN select MODULES_USE_ELF_RELA select PERF_USE_VMALLOC diff --git a/init/Kconfig b/init/Kconfig index 32c24950c4ce..835fb5e78a8f 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -504,7 +504,6 @@ config VIRT_CPU_ACCOUNTING_NATIVE config VIRT_CPU_ACCOUNTING_GEN bool "Full dynticks CPU time accounting" depends on HAVE_CONTEXT_TRACKING_USER - depends on HAVE_VIRT_CPU_ACCOUNTING_GEN depends on GENERIC_CLOCKEVENTS select VIRT_CPU_ACCOUNTING select CONTEXT_TRACKING_USER diff --git a/kernel/time/Kconfig b/kernel/time/Kconfig index bae8f11070be..d4325dae1f03 100644 --- a/kernel/time/Kconfig +++ b/kernel/time/Kconfig @@ -121,8 +121,6 @@ config NO_HZ_FULL # We need at least one periodic CPU for timekeeping depends on SMP depends on HAVE_CONTEXT_TRACKING_USER - # VIRT_CPU_ACCOUNTING_GEN dependency - depends on HAVE_VIRT_CPU_ACCOUNTING_GEN select NO_HZ_COMMON select RCU_NOCB_CPU select VIRT_CPU_ACCOUNTING_GEN