From: Tom Rini <trini@konsulko.com>
To: u-boot@lists.denx.de
Subject: [PATCH 5/8] arm: cp15: update DACR value to activate access control
Date: Wed, 3 Mar 2021 14:09:13 -0500 [thread overview]
Message-ID: <20210303190913.GR1310@bill-the-cat> (raw)
In-Reply-To: <20210205135332.5.I7ab5a1fc95ca9fae01a4ec194a67374ba6872638@changeid>
On Fri, Feb 05, 2021 at 01:53:36PM +0100, Patrick Delaunay wrote:
> Update the initial value of Domain Access Control Register (DACR)
> and set by default the access permission to client (DACR_Dn_CLIENT = 1U)
> for each of the 16 domains and no more to all-supervisor
> (DACR_Dn_MANAGER = 3U).
>
> This patch allows to activate the domain checking in MMU against the
> permission bits in the translation tables and avoids prefetching issue
> on ARMv7 [1].
>
> Today it was already done for OMAP2 architecture
> ./arch/arm/mach-omap2/omap-cache.c::arm_init_domains
> introduced by commit de63ac278cba ("ARM: mmu: Set domain permissions
> to client access") which fixes lot of speculative prefetch aborts seen
> on OMAP5 secure devices.
>
> [1] https://developer.arm.com/documentation/ddi0406/b/System-Level-Architecture/Virtual-Memory-System-Architecture--VMSA-/Memory-access-control/The-Execute-Never--XN--attribute-and-instruction-prefetching
>
> Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
> Reported-by: Ard Biesheuvel <ardb@kernel.org>
> Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Applied to u-boot/next, thanks!
--
Tom
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next prev parent reply other threads:[~2021-03-03 19:09 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-05 12:53 [PATCH 0/8] Patrick Delaunay
2021-02-05 12:53 ` [PATCH 1/8] stm32mp: update MMU config before the relocation Patrick Delaunay
2021-03-03 19:08 ` Tom Rini
2021-02-05 12:53 ` [PATCH 2/8] stm32mp: update the mmu configuration for SPL and prereloc Patrick Delaunay
2021-03-03 19:08 ` Tom Rini
2021-02-05 12:53 ` [PATCH 3/8] arm: remove TTB_SECT_XN_MASK in DCACHE_WRITETHROUGH Patrick Delaunay
2021-03-03 19:08 ` Tom Rini
2021-02-05 12:53 ` [PATCH 4/8] arm: cosmetic: align TTB_SECT define value Patrick Delaunay
2021-03-03 19:09 ` Tom Rini
2021-02-05 12:53 ` [PATCH 5/8] arm: cp15: update DACR value to activate access control Patrick Delaunay
2021-03-03 19:09 ` Tom Rini [this message]
2021-02-05 12:53 ` [PATCH 6/8] arm: omap2: remove arm_init_domains Patrick Delaunay
2021-03-03 19:09 ` Tom Rini
2021-02-05 12:53 ` [PATCH 7/8] arm: cp15: remove weak function arm_init_domains Patrick Delaunay
2021-03-03 19:09 ` Tom Rini
2021-02-05 12:53 ` [PATCH 8/8] arm: remove set_dacr/get_dacr functions Patrick Delaunay
2021-03-03 19:09 ` Tom Rini
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