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From: Will Deacon <will.deacon@arm.com>
To: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org, catalin.marinas@arm.com,
	mark.rutland@arm.com, ard.biesheuvel@linaro.org,
	sboyd@codeaurora.org, dave.hansen@linux.intel.com,
	keescook@chromium.org, Will Deacon <will.deacon@arm.com>
Subject: [PATCH 02/18] arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN
Date: Fri, 17 Nov 2017 18:21:45 +0000	[thread overview]
Message-ID: <1510942921-12564-3-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1510942921-12564-1-git-send-email-will.deacon@arm.com>

We're about to rework the way ASIDs are allocated, switch_mm is
implemented and low-level kernel entry/exit is handled, so keep the
ARM64_SW_TTBR0_PAN code out of the way whilst we do the heavy lifting.

It will be re-enabled in a subsequent patch.

Signed-off-by: Will Deacon <will.deacon@arm.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0df64a6a56d4..582bbd77c390 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -872,6 +872,7 @@ endif
 
 config ARM64_SW_TTBR0_PAN
 	bool "Emulate Privileged Access Never using TTBR0_EL1 switching"
+	depends on BROKEN       # Temporary while switch_mm is reworked
 	help
 	  Enabling this option prevents the kernel from accessing
 	  user-space memory directly by pointing TTBR0_EL1 to a reserved
-- 
2.1.4

  parent reply	other threads:[~2017-11-17 18:22 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-11-17 18:21 [PATCH 00/18] arm64: Unmap the kernel whilst running in userspace (KAISER) Will Deacon
2017-11-17 18:21 ` [PATCH 01/18] arm64: mm: Use non-global mappings for kernel space Will Deacon
2017-11-17 18:21 ` Will Deacon [this message]
2017-11-17 18:21 ` [PATCH 03/18] arm64: mm: Move ASID from TTBR0 to TTBR1 Will Deacon
2017-11-17 18:21 ` [PATCH 04/18] arm64: mm: Remove pre_ttbr0_update_workaround for Falkor erratum #E1003 Will Deacon
2017-11-17 18:21 ` [PATCH 05/18] arm64: mm: Rename post_ttbr0_update_workaround Will Deacon
2017-11-17 18:21 ` [PATCH 06/18] arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN Will Deacon
2017-11-17 18:21 ` [PATCH 07/18] arm64: mm: Allocate ASIDs in pairs Will Deacon
2017-11-17 18:21 ` [PATCH 08/18] arm64: mm: Add arm64_kernel_mapped_at_el0 helper using static key Will Deacon
2017-11-17 18:21 ` [PATCH 09/18] arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI Will Deacon
2017-11-17 18:21 ` [PATCH 10/18] arm64: entry: Add exception trampoline page for exceptions from EL0 Will Deacon
2017-11-17 18:21 ` [PATCH 11/18] arm64: mm: Map entry trampoline into trampoline and kernel page tables Will Deacon
2017-11-17 18:21 ` [PATCH 12/18] arm64: entry: Explicitly pass exception level to kernel_ventry macro Will Deacon
2017-11-17 18:21 ` [PATCH 13/18] arm64: entry: Hook up entry trampoline to exception vectors Will Deacon
2017-11-17 18:21 ` [PATCH 14/18] arm64: erratum: Work around Falkor erratum #E1003 in trampoline code Will Deacon
2017-11-18  0:27   ` Stephen Boyd
2017-11-20 18:05     ` Will Deacon
2017-11-17 18:21 ` [PATCH 15/18] arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native tasks Will Deacon
2017-11-17 18:21 ` [PATCH 16/18] arm64: entry: Add fake CPU feature for mapping the kernel at EL0 Will Deacon
2017-11-17 18:22 ` [PATCH 17/18] arm64: makefile: Ensure TEXT_OFFSET doesn't overlap with trampoline Will Deacon
2017-11-17 18:22 ` [PATCH 18/18] arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0 Will Deacon
2017-11-22 16:52   ` Marc Zyngier
2017-11-22 19:36     ` Will Deacon
2017-11-18  0:19 ` [PATCH 00/18] arm64: Unmap the kernel whilst running in userspace (KAISER) Stephen Boyd
2017-11-20 18:03   ` Will Deacon
2017-11-18 15:25 ` Ard Biesheuvel
2017-11-20 18:06   ` Will Deacon
2017-11-20 18:20     ` Ard Biesheuvel
2017-11-22 19:37       ` Will Deacon
2017-11-20 22:50 ` Laura Abbott
2017-11-22 19:37   ` Will Deacon
2017-11-22 16:19 ` Pavel Machek
2017-11-22 19:37   ` Will Deacon
2017-11-22 22:36     ` Pavel Machek
2017-11-22 21:19   ` Ard Biesheuvel
2017-11-22 22:33     ` Pavel Machek
2017-11-22 23:19       ` Ard Biesheuvel
2017-11-22 23:37         ` Pavel Machek
2017-11-23  6:51           ` Ard Biesheuvel
2017-11-23  9:07             ` Pavel Machek
2017-11-23  9:23               ` Ard Biesheuvel
2017-11-23 10:46                 ` Pavel Machek
2017-11-23 11:38                   ` Ard Biesheuvel
2017-11-23 17:54                     ` Pavel Machek
2017-11-23 18:17                       ` Ard Biesheuvel

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