From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v1 12/15] powerpc/kuap: Wire-up KUAP on 40x
Date: Wed, 6 Oct 2021 14:43:45 +0200 [thread overview]
Message-ID: <21fba0d5addd3ec1f90d742c21b86dabc208fc32.1633523837.git.christophe.leroy@csgroup.eu> (raw)
In-Reply-To: <cover.1633523837.git.christophe.leroy@csgroup.eu>
This adds KUAP support to 40x. This is done by checking
the content of SPRN_PID at the time user pgtable is loaded.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/kernel/head_40x.S | 8 ++++++++
arch/powerpc/platforms/Kconfig.cputype | 1 +
2 files changed, 9 insertions(+)
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index 7d72ee5ab387..87d322dbed94 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -297,6 +297,10 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
3:
mfspr r11,SPRN_SPRG_THREAD
lwz r11,PGDIR(r11)
+#ifdef CONFIG_PPC_KUAP
+ rlwinm. r9, r9, 0, 0xff
+ beq 5f /* Kuap fault */
+#endif
4:
tophys(r11, r11)
rlwimi r11, r10, 12, 20, 29 /* Create L1 (pgdir/pmd) address */
@@ -377,6 +381,10 @@ _ASM_NOKPROBE_SYMBOL(\name\()_virt)
3:
mfspr r11,SPRN_SPRG_THREAD
lwz r11,PGDIR(r11)
+#ifdef CONFIG_PPC_KUAP
+ rlwinm. r9, r9, 0, 0xff
+ beq 5f /* Kuap fault */
+#endif
4:
tophys(r11, r11)
rlwimi r11, r10, 12, 20, 29 /* Create L1 (pgdir/pmd) address */
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 74e5887abbce..3fdc10bc4aab 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -53,6 +53,7 @@ config 40x
select PPC_UDBG_16550
select 4xx_SOC
select HAVE_PCI
+ select PPC_HAVE_KUAP
config 44x
bool "AMCC 44x, 46x or 47x"
--
2.31.1
next prev parent reply other threads:[~2021-10-06 12:49 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-06 12:43 [PATCH v1 00/15] powerpc: Add KUAP support for BOOKE and 40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 01/15] powerpc/32s: Do kuep_lock() and kuep_unlock() in assembly Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 02/15] powerpc/32s: Save content of sr0 to avoid 'mfsr' Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 03/15] powerpc/kuap: Add a generic intermediate layer Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 04/15] powerpc/kuap: Check KUAP activation in generic functions Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 05/15] powerpc/kuap: Remove __kuap_assert_locked() Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 06/15] powerpc/kuap: Add kuap_lock() Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 07/15] powerpc/nohash: Move setup_kuap out of 8xx.c Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 08/15] powerpc/config: Add CONFIG_BOOKE_OR_40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 09/15] powerpc/kuap: Prepare for supporting KUAP on BOOK3E/64 Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 10/15] powerpc: Add KUAP support for BOOKE and 40x Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 11/15] powerpc/kuap: Wire-up KUAP on 44x Christophe Leroy
2021-10-06 12:43 ` Christophe Leroy [this message]
2021-10-06 12:43 ` [PATCH v1 13/15] powerpc/kuap: Wire-up KUAP on 85xx in 32 bits mode Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 14/15] powerpc/kuap: Wire-up KUAP on book3e/64 Christophe Leroy
2021-10-06 12:43 ` [PATCH v1 15/15] powerpc: Remove CONFIG_PPC_HAVE_KUAP Christophe Leroy
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