From: Matt Turner <mattst88@gmail.com>
To: linux-alpha@vger.kernel.org, richard.henderson@linaro.org
Cc: linmag7@gmail.com, linux-kernel@vger.kernel.org
Subject: [PATCH 21/24] alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
Date: Tue, 1 Sep 2026 11:50:34 -0400 [thread overview]
Message-ID: <46250102699dd2f07b6ee19ca58edf3a9cdfa0de.1788277742.git.mattst88@gmail.com> (raw)
In-Reply-To: <cover.1788277742.git.mattst88@gmail.com>
activate_mm() on Alpha calls __load_new_mm_context() which assigns a
new ASID and invokes PALcode swpctx. On SMP, an interrupt arriving
between the ASID update and the page table switch could see
inconsistent state. Ensure activate_mm() is called with interrupts
disabled during exec.
Assisted-by: Claude:claude-opus-4-6
Signed-off-by: Matt Turner <mattst88@gmail.com>
---
arch/alpha/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git ./arch/alpha/Kconfig ./arch/alpha/Kconfig
index 827b224f2f8a..bda8443a7323 100644
--- ./arch/alpha/Kconfig
+++ ./arch/alpha/Kconfig
@@ -37,6 +37,7 @@ config ALPHA
select GENERIC_PCI_IOMAP
select AUTO_IRQ_AFFINITY if SMP
select GENERIC_IRQ_SHOW
+ select ARCH_WANT_IRQS_OFF_ACTIVATE_MM
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_HAVE_NMI_SAFE_CMPXCHG
--
2.54.0
next prev parent reply other threads:[~2026-09-01 15:51 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-09-01 15:50 [PATCH 00/24] alpha: catch up on architecture Kconfig options Matt Turner
2026-09-01 15:50 ` [PATCH 01/24] alpha: fix arch_irqs_disabled_flags() to treat any raised IPL as disabled Matt Turner
2026-09-01 23:20 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 02/24] alpha: enter hardirq context before looking up the irq descriptor Matt Turner
2026-09-03 22:07 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 03/24] alpha: select ARCH_HAS_UBSAN Matt Turner
2026-09-01 22:34 ` Magnus Lindholm
2026-09-04 20:31 ` Michael Cree
2026-09-01 15:50 ` [PATCH 04/24] alpha: select ARCH_HAS_GCOV_PROFILE_ALL Matt Turner
2026-09-03 22:35 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 05/24] alpha: select HAVE_DEBUG_KMEMLEAK Matt Turner
2026-09-02 6:01 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 06/24] alpha: select EDAC_SUPPORT Matt Turner
2026-09-01 23:17 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 07/24] alpha: select ARCH_SUPPORTS_ATOMIC_RMW Matt Turner
2026-09-02 6:17 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 08/24] alpha: select ARCH_HAS_FAST_MULTIPLIER Matt Turner
2026-09-02 7:49 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 09/24] alpha: select ARCH_SUPPORTS_INT128 Matt Turner
2026-09-02 8:50 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 10/24] alpha: select HAVE_ARCH_COMPILER_H Matt Turner
2026-09-02 9:11 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 11/24] alpha: select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE Matt Turner
2026-09-02 9:25 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 12/24] alpha: add HAVE_ARCH_THREAD_STRUCT_WHITELIST support Matt Turner
2026-09-02 9:35 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 13/24] alpha: add ARCH_HAS_PTE_SPECIAL support Matt Turner
2026-09-02 9:42 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 14/24] alpha: add ARCH_SUPPORTS_PAGE_TABLE_CHECK support Matt Turner
2026-09-01 22:45 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 15/24] alpha: select ARCH_HAS_DEBUG_VM_PGTABLE Matt Turner
2026-09-03 22:52 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 16/24] alpha: select HAVE_GUP_FAST Matt Turner
2026-09-02 21:09 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 17/24] alpha: select ARCH_USE_MEMTEST Matt Turner
2026-09-02 21:56 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 18/24] alpha: select SYSCTL_EXCEPTION_TRACE Matt Turner
2026-09-02 22:02 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 19/24] alpha: discard .eh_frame and the relocation sections Matt Turner
2026-09-03 5:18 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 20/24] alpha: select ARCH_WANT_LD_ORPHAN_WARN Matt Turner
2026-09-03 5:34 ` Magnus Lindholm
2026-09-01 15:50 ` Matt Turner [this message]
2026-09-03 5:42 ` [PATCH 21/24] alpha: select ARCH_WANT_IRQS_OFF_ACTIVATE_MM Magnus Lindholm
2026-09-01 15:50 ` [PATCH 22/24] alpha: add HAVE_PERF_REGS and HAVE_PERF_USER_STACK_DUMP support Matt Turner
2026-09-03 21:01 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 23/24] alpha: select SPARSE_IRQ Matt Turner
2026-09-03 21:26 ` Magnus Lindholm
2026-09-01 15:50 ` [PATCH 24/24] alpha: add TRACE_IRQFLAGS_SUPPORT Matt Turner
2026-09-03 22:58 ` Magnus Lindholm
2026-09-02 18:53 ` [PATCH 00/24] alpha: catch up on architecture Kconfig options Magnus Lindholm
2026-09-02 18:57 ` Matt Turner
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