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Date: Mon, 24 Jan 2022 18:47:12 +0100
From: Ard Biesheuvel <ardb@...nel.org>
To: linux@...linux.org.uk, linux-arm-kernel@...ts.infradead.org
Cc: linux-hardening@...r.kernel.org, Ard Biesheuvel <ardb@...nel.org>,
Nicolas Pitre <nico@...xnic.net>,
Arnd Bergmann <arnd@...db.de>,
Kees Cook <keescook@...omium.org>,
Keith Packard <keithpac@...zon.com>,
Linus Walleij <linus.walleij@...aro.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Tony Lindgren <tony@...mide.com>,
Marc Zyngier <maz@...nel.org>,
Vladimir Murzin <vladimir.murzin@....com>,
Jesse Taube <mr.bossman075@...il.com>
Subject: [PATCH v5 00/32] ARM vmap'ed and IRQ stacks roundup
This v5 series is a combined followup to
- IRQ stacks support for v7 SMP systems [0],
- vmap'ed stacks support for v7 SMP systems[1],
- extending support for both IRQ stacks and vmap'ed stacks for all
remaining configurations, including v6/v7 SMP multiplatform kernels
and uniprocessor configurations including v7-M [2]
[0] https://lore.kernel.org/linux-arm-kernel/20211115084732.3704393-1-ardb@kernel.org/
[1] https://lore.kernel.org/linux-arm-kernel/20211122092816.2865873-1-ardb@kernel.org/
[2] https://lore.kernel.org/linux-arm-kernel/20211206164659.1495084-1-ardb@kernel.org/
This work was queued up in the ARM tree for a while, but due to problems
with the vmap'ed stacks code, which was difficult to revert in
isolation, the whole stack was dropped again.
In order to prevent similar problems from occurring this time around,
the series was reorganized so that the vmap'ed stacks changes appear at
the very end, which also results in a more natural progression of the
changes.
Changes since v4:
- incorporate fixups to avoid build failures on Clang related to
literals in subsections,
- switch from the ID map to swapper_pg_dir as early as possible when
onlining a CPU on !LPAE, to ensure that the stack is mapped,
- use SMP_ON_UP patching to elide HWCAP_TLS tests on SMP+v6,
- clean up __switch_to() for Thumb2 a bit more,
- add patch to make the vmalloc_seq counter SMP safe,
- use enter_lazy_tlb() hook on !LPAE to ensure that the active_mm used
by a kernel thread has a mapping for its vmap'ed stack,
Code can be found under the arm-vmap-stacks-v5 tag at
git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git
Cc: Russell King <linux@...linux.org.uk>
Cc: Nicolas Pitre <nico@...xnic.net>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Kees Cook <keescook@...omium.org>
Cc: Keith Packard <keithpac@...zon.com>
Cc: Linus Walleij <linus.walleij@...aro.org>
Cc: Nick Desaulniers <ndesaulniers@...gle.com>
Cc: Tony Lindgren <tony@...mide.com>
Cc: Marc Zyngier <maz@...nel.org>
Cc: Vladimir Murzin <vladimir.murzin@....com>
Cc: Jesse Taube <mr.bossman075@...il.com>
Ard Biesheuvel (26):
ARM: riscpc: drop support for IOMD_IRQREQC/IOMD_IRQREQD IRQ groups
ARM: decompressor: disable stack protector
ARM: stackprotector: prefer compiler for TLS based per-task protector
ARM: entry: preserve thread_info pointer in switch_to
ARM: module: implement support for PC-relative group relocations
ARM: assembler: add optimized ldr/str macros to load variables from
memory
ARM: percpu: add SMP_ON_UP support
ARM: use TLS register for 'current' on !SMP as well
ARM: smp: defer TPIDRURO update for SMP v6 configurations too
ARM: implement THREAD_INFO_IN_TASK for uniprocessor systems
ARM: assembler: introduce bl_r macro
ARM: unwind: support unwinding across multiple stacks
ARM: export dump_mem() to other objects
ARM: unwind: dump exception stack from calling frame
ARM: backtrace-clang: avoid crash on bogus frame pointer
ARM: implement IRQ stacks
ARM: call_with_stack: add unwind support
ARM: run softirqs on the per-CPU IRQ stack
ARM: memcpy: use frame pointer as unwind anchor
ARM: memmove: use frame pointer as unwind anchor
ARM: memset: clean up unwind annotations
ARM: unwind: disregard unwind info before stack frame is set up
ARM: entry: rework stack realignment code in svc_entry
ARM: switch_to: clean up Thumb2 code path
ARM: mm: prepare vmalloc_seq handling for use under SMP
ARM: implement support for vmap'ed stacks
Arnd Bergmann (5):
ARM: riscpc: use GENERIC_IRQ_MULTI_HANDLER
ARM: footbridge: use GENERIC_IRQ_MULTI_HANDLER
ARM: iop32x: offset IRQ numbers by 1
ARM: iop32x: use GENERIC_IRQ_MULTI_HANDLER
ARM: remove old-style irq entry
Vladimir Murzin (1):
irqchip: nvic: Use GENERIC_IRQ_MULTI_HANDLER
arch/arm/Kconfig | 39 ++--
arch/arm/Makefile | 9 +
arch/arm/boot/compressed/Makefile | 6 +-
arch/arm/boot/compressed/misc.c | 7 -
arch/arm/include/asm/assembler.h | 209 ++++++++++++++++----
arch/arm/include/asm/current.h | 47 +++--
arch/arm/include/asm/elf.h | 3 +
arch/arm/include/asm/entry-macro-multi.S | 40 ----
arch/arm/include/asm/hardware/entry-macro-iomd.S | 131 ------------
arch/arm/include/asm/insn.h | 17 ++
arch/arm/include/asm/irq.h | 1 -
arch/arm/include/asm/mach/arch.h | 2 -
arch/arm/include/asm/mmu.h | 2 +-
arch/arm/include/asm/mmu_context.h | 22 ++-
arch/arm/include/asm/page.h | 3 +
arch/arm/include/asm/percpu.h | 36 +++-
arch/arm/include/asm/smp.h | 5 -
arch/arm/include/asm/stacktrace.h | 12 ++
arch/arm/include/asm/switch_to.h | 3 +-
arch/arm/include/asm/thread_info.h | 35 +---
arch/arm/include/asm/tls.h | 30 ++-
arch/arm/include/asm/v7m.h | 3 +-
arch/arm/kernel/asm-offsets.c | 3 -
arch/arm/kernel/entry-armv.S | 208 +++++++++++++++----
arch/arm/kernel/entry-common.S | 16 +-
arch/arm/kernel/entry-header.S | 47 ++++-
arch/arm/kernel/entry-v7m.S | 39 ++--
arch/arm/kernel/head-common.S | 4 +-
arch/arm/kernel/head.S | 7 +
arch/arm/kernel/irq.c | 55 ++++--
arch/arm/kernel/module.c | 90 +++++++++
arch/arm/kernel/process.c | 7 +-
arch/arm/kernel/setup.c | 8 +-
arch/arm/kernel/sleep.S | 13 ++
arch/arm/kernel/smp.c | 11 +-
arch/arm/kernel/traps.c | 92 ++++++++-
arch/arm/kernel/unwind.c | 50 +++--
arch/arm/kernel/vmlinux.lds.S | 4 +-
arch/arm/lib/backtrace-clang.S | 13 +-
arch/arm/lib/backtrace.S | 7 +
arch/arm/lib/call_with_stack.S | 33 +++-
arch/arm/lib/copy_from_user.S | 13 +-
arch/arm/lib/copy_template.S | 67 +++----
arch/arm/lib/copy_to_user.S | 13 +-
arch/arm/lib/memcpy.S | 13 +-
arch/arm/lib/memmove.S | 60 ++----
arch/arm/lib/memset.S | 7 +-
arch/arm/mach-footbridge/common.c | 87 ++++++++
arch/arm/mach-footbridge/include/mach/entry-macro.S | 107 ----------
arch/arm/mach-iop32x/cp6.c | 10 +-
arch/arm/mach-iop32x/include/mach/entry-macro.S | 31 ---
arch/arm/mach-iop32x/include/mach/irqs.h | 2 +-
arch/arm/mach-iop32x/iop3xx.h | 1 +
arch/arm/mach-iop32x/irq.c | 29 ++-
arch/arm/mach-iop32x/irqs.h | 60 +++---
arch/arm/mach-rpc/fiq.S | 5 +-
arch/arm/mach-rpc/include/mach/entry-macro.S | 13 --
arch/arm/mach-rpc/irq.c | 95 +++++++++
arch/arm/mm/Kconfig | 1 +
arch/arm/mm/context.c | 3 +-
arch/arm/mm/ioremap.c | 18 +-
drivers/irqchip/Kconfig | 1 +
drivers/irqchip/irq-nvic.c | 22 +--
63 files changed, 1270 insertions(+), 757 deletions(-)
delete mode 100644 arch/arm/include/asm/entry-macro-multi.S
delete mode 100644 arch/arm/include/asm/hardware/entry-macro-iomd.S
delete mode 100644 arch/arm/mach-footbridge/include/mach/entry-macro.S
delete mode 100644 arch/arm/mach-iop32x/include/mach/entry-macro.S
delete mode 100644 arch/arm/mach-rpc/include/mach/entry-macro.S
--
2.30.2
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