From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 02/20] arm64: mm: Temporarily disable ARM64_SW_TTBR0_PAN
Date: Wed, 6 Dec 2017 12:35:21 +0000 [thread overview]
Message-ID: <1512563739-25239-3-git-send-email-will.deacon@arm.com> (raw)
In-Reply-To: <1512563739-25239-1-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.
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
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 a93339f5178f..7e7d7fd152c4 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -910,6 +910,7 @@ 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
next prev parent reply other threads:[~2017-12-06 12:35 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-06 12:35 [PATCH v3 00/20] arm64: Unmap the kernel whilst running in userspace (KPTI) Will Deacon
2017-12-06 12:35 ` [PATCH v3 01/20] arm64: mm: Use non-global mappings for kernel space Will Deacon
2017-12-06 12:35 ` Will Deacon [this message]
2017-12-06 12:35 ` [PATCH v3 03/20] arm64: mm: Move ASID from TTBR0 to TTBR1 Will Deacon
2017-12-06 12:35 ` [PATCH v3 04/20] arm64: mm: Remove pre_ttbr0_update_workaround for Falkor erratum #E1003 Will Deacon
2017-12-06 12:35 ` [PATCH v3 05/20] arm64: mm: Rename post_ttbr0_update_workaround Will Deacon
2017-12-06 12:35 ` [PATCH v3 06/20] arm64: mm: Fix and re-enable ARM64_SW_TTBR0_PAN Will Deacon
2018-01-17 2:58 ` Yisheng Xie
2017-12-06 12:35 ` [PATCH v3 07/20] arm64: mm: Allocate ASIDs in pairs Will Deacon
2017-12-06 12:35 ` [PATCH v3 08/20] arm64: mm: Add arm64_kernel_unmapped_at_el0 helper Will Deacon
2017-12-06 12:35 ` [PATCH v3 09/20] arm64: mm: Invalidate both kernel and user ASIDs when performing TLBI Will Deacon
2017-12-06 12:35 ` [PATCH v3 10/20] arm64: entry: Add exception trampoline page for exceptions from EL0 Will Deacon
2017-12-06 12:35 ` [PATCH v3 11/20] arm64: mm: Map entry trampoline into trampoline and kernel page tables Will Deacon
2017-12-06 14:32 ` Mark Rutland
2018-01-23 8:28 ` Yisheng Xie
2018-01-23 10:04 ` Will Deacon
2018-01-23 10:43 ` Yisheng Xie
2017-12-06 12:35 ` [PATCH v3 12/20] arm64: entry: Explicitly pass exception level to kernel_ventry macro Will Deacon
2017-12-06 12:35 ` [PATCH v3 13/20] arm64: entry: Hook up entry trampoline to exception vectors Will Deacon
2017-12-06 12:35 ` [PATCH v3 14/20] arm64: erratum: Work around Falkor erratum #E1003 in trampoline code Will Deacon
2017-12-06 12:35 ` [PATCH v3 15/20] arm64: tls: Avoid unconditional zeroing of tpidrro_el0 for native tasks Will Deacon
2017-12-06 12:35 ` [PATCH v3 16/20] arm64: entry: Add fake CPU feature for unmapping the kernel at EL0 Will Deacon
2017-12-06 14:11 ` Mark Rutland
2017-12-06 12:35 ` [PATCH v3 17/20] arm64: Kconfig: Add CONFIG_UNMAP_KERNEL_AT_EL0 Will Deacon
2017-12-06 12:35 ` [PATCH v3 18/20] perf: arm_spe: Fail device probe when arm64_kernel_unmapped_at_el0() Will Deacon
2017-12-06 13:34 ` Mark Rutland
2017-12-06 12:35 ` [PATCH v3 19/20] arm64: mm: Introduce TTBR_ASID_MASK for getting at the ASID in the TTBR Will Deacon
2017-12-06 14:12 ` Mark Rutland
2017-12-06 12:35 ` [PATCH v3 20/20] arm64: kaslr: Put kernel vectors address in separate data page Will Deacon
2017-12-06 12:59 ` Ard Biesheuvel
2017-12-06 13:27 ` Will Deacon
2017-12-06 14:03 ` Ard Biesheuvel
2017-12-08 0:40 ` [PATCH v3 00/20] arm64: Unmap the kernel whilst running in userspace (KPTI) Laura Abbott
2017-12-11 13:23 ` Will Deacon
2017-12-11 17:59 ` Catalin Marinas
2018-01-04 5:17 ` Florian Fainelli
2018-01-04 6:50 ` Greg Kroah-Hartman
2018-01-04 18:23 ` Florian Fainelli
2018-01-04 23:27 ` Russell King - ARM Linux
2018-01-05 16:06 ` Greg Kroah-Hartman
2018-01-05 16:12 ` Ard Biesheuvel
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1512563739-25239-3-git-send-email-will.deacon@arm.com \
--to=will.deacon@arm.com \
--cc=linux-arm-kernel@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).