[PATCH 00/28] vdso: Preparations for generic data storage

From: Thomas Weißschuh
Date: Thu Oct 10 2024 - 03:02:20 EST

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Historically each architecture defined their own datapage to store the
VDSO data. This stands in contrast to the generic nature of the VDSO
code itself.
We plan to introduce a generic framework for the management of the VDSO
data storage that can be used by all architectures and which works
together with the existing generic VDSO code.

Before that is possible align the different architectures by
standardizing on the existing generic infrastructure and moving things
out of the VDSO data page which does not belong there.

Patches 1- 2: csky
Patch 3: s390
Patches 4- 5: arm64
Patch 6: riscv
Patch 7: arm
Patch 8: LoongArch
Patch 9: MIPS
Patches 10-20: x86
Patches 21-27: powerpc
Patch 28: Renamings to avoid a name clash with the new code.

These patches are intended to be merged via the tip tree,
so the following patches can be based on a unified base.

The queue, including the full generic storage, is available at

git://git.kernel.org/pub/scm/linux/kernel/git/thomas.weissschuh/linux.git vdso/store

Signed-off-by: Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>
---
Nam Cao (1):
vdso: Rename struct arch_vdso_data to arch_vdso_time_data

Thomas Weißschuh (27):
csky/vdso: Remove gettimeofday() and friends from VDSO
csky/vdso: Remove arch_vma_name()
s390/vdso: Drop LBASE_VDSO
arm64: vdso: Drop LBASE_VDSO
arm64: vdso: Use only one single vvar mapping
riscv: vdso: Use only one single vvar mapping
arm: vdso: Remove assembly for datapage access
LoongArch: vDSO: Use vdso/datapage.h to access vDSO data
MIPS: vdso: Avoid name conflict around "vdso_data"
x86/mm/mmap: Remove arch_vma_name()
x86: vdso: Use __arch_get_vdso_data() to access vdso data
x86: vdso: Place vdso_data at beginning of vvar page
x86: vdso: Access rng data from kernel without vvar
x86: vdso: Allocate vvar page from C code
x86: vdso: Access timens vdso data without vvar.h
x86: vdso: Access rng vdso data without vvar.h
x86: vdso: Move the rng offset to vsyscall.h
x86: vdso: Access vdso data without vvar.h
x86: vdso: Delete vvar.h
x86: vdso: Split virtual clock pages into dedicated mapping
powerpc: vdso: Remove offset comment from 32bit vdso_arch_data
powerpc: procfs: Propagate error of remap_pfn_range()
powerpc/pseries/lparcfg: Fix printing of system_active_processors
powerpc/pseries/lparcfg: Use num_possible_cpus() for potential processors
powerpc: Add kconfig option for the systemcfg page
powerpc: Split systemcfg data out of vdso data page
powerpc: Split systemcfg struct definitions out from vdso

arch/Kconfig | 2 +-
arch/arm/include/asm/vdso/gettimeofday.h | 4 +-
arch/arm/vdso/Makefile | 2 +-
arch/arm/vdso/datapage.S | 16 ---
arch/arm/vdso/vdso.lds.S | 3 +-
arch/arm64/include/asm/vdso.h | 9 +-
arch/arm64/kernel/vdso.c | 43 +++-----
arch/arm64/kernel/vdso/vdso.lds.S | 2 +-
arch/arm64/kernel/vdso32/vdso.lds.S | 2 +-
arch/csky/Kconfig | 4 -
arch/csky/include/asm/vdso/clocksource.h | 9 --
arch/csky/include/asm/vdso/gettimeofday.h | 114 ---------------------
arch/csky/include/asm/vdso/processor.h | 12 ---
arch/csky/include/asm/vdso/vsyscall.h | 22 ----
arch/csky/kernel/vdso.c | 31 +-----
arch/csky/kernel/vdso/Makefile | 1 -
arch/csky/kernel/vdso/vdso.lds.S | 4 -
arch/csky/kernel/vdso/vgettimeofday.c | 30 ------
arch/loongarch/include/asm/vdso/getrandom.h | 3 +-
arch/loongarch/include/asm/vdso/gettimeofday.h | 4 +-
arch/loongarch/include/asm/vdso/vdso.h | 18 +---
arch/loongarch/kernel/asm-offsets.c | 9 ++
arch/loongarch/vdso/vdso.lds.S | 8 +-
arch/loongarch/vdso/vgetcpu.c | 2 +-
arch/mips/vdso/genvdso.c | 4 +-
arch/powerpc/Kconfig | 8 ++
arch/powerpc/include/asm/systemcfg.h | 52 ++++++++++
arch/powerpc/include/asm/vdso_datapage.h | 61 +----------
arch/powerpc/kernel/proc_powerpc.c | 37 +++++--
arch/powerpc/kernel/setup-common.c | 5 +-
arch/powerpc/kernel/smp.c | 11 +-
arch/powerpc/kernel/time.c | 4 +
arch/powerpc/kernel/vdso.c | 20 ----
arch/powerpc/platforms/powernv/smp.c | 5 +-
arch/powerpc/platforms/pseries/hotplug-cpu.c | 5 +-
arch/powerpc/platforms/pseries/lparcfg.c | 5 +-
arch/riscv/Kconfig | 2 +-
.../riscv/include/asm/vdso/{data.h => time_data.h} | 8 +-
arch/riscv/kernel/sys_hwprobe.c | 2 +-
arch/riscv/kernel/vdso.c | 52 +++-------
arch/riscv/kernel/vdso/hwprobe.c | 4 +-
arch/s390/Kconfig | 2 +-
arch/s390/include/asm/vdso.h | 3 -
arch/s390/include/asm/vdso/data.h | 12 ---
arch/s390/include/asm/vdso/time_data.h | 12 +++
arch/s390/kernel/vdso32/vdso32.lds.S | 2 +-
arch/s390/kernel/vdso64/vdso64.lds.S | 2 +-
arch/x86/entry/vdso/vdso-layout.lds.S | 20 ++--
arch/x86/entry/vdso/vma.c | 87 ++++++++++------
arch/x86/include/asm/vdso/getrandom.h | 10 +-
arch/x86/include/asm/vdso/gettimeofday.h | 12 ++-
arch/x86/include/asm/vdso/vsyscall.h | 14 ++-
arch/x86/include/asm/vvar.h | 71 -------------
arch/x86/kernel/vmlinux.lds.S | 23 -----
arch/x86/mm/mmap.c | 5 -
arch/x86/tools/relocs.c | 1 -
include/vdso/datapage.h | 8 +-
57 files changed, 295 insertions(+), 628 deletions(-)
---
base-commit: 8cf0b93919e13d1e8d4466eb4080a4c4d9d66d7b
change-id: 20241009-vdso-generic-base-63066fd474b5

Best regards,
--
Thomas Weißschuh <thomas.weissschuh@xxxxxxxxxxxxx>

Next message: Thomas Weißschuh: "[PATCH 02/28] csky/vdso: Remove arch_vma_name()"
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