From: Sasha Levin <sashal@kernel•org>
To: linux-kernel@vger•kernel.org, stable@vger•kernel.org
Cc: Sasha Levin <sashal@kernel•org>,
linuxppc-dev@lists•ozlabs.org, npiggin@gmail•com
Subject: [PATCH AUTOSEL 5.10 21/34] powerpc/40x: Map 32Mbytes of memory at startup
Date: Mon, 17 Jan 2022 12:03:11 -0500 [thread overview]
Message-ID: <20220117170326.1471712-21-sashal@kernel.org> (raw)
In-Reply-To: <20220117170326.1471712-1-sashal@kernel.org>
From: Christophe Leroy <christophe.leroy@csgroup•eu>
[ Upstream commit 06e7cbc29e97b4713b4ea6def04ae8501a7d1a59 ]
As reported by Carlo, 16Mbytes is not enough with modern kernels
that tend to be a bit big, so map another 16M page at boot.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup•eu>
Signed-off-by: Michael Ellerman <mpe@ellerman•id.au>
Link: https://lore.kernel.org/r/89b5f974a7fa5011206682cd092e2c905530ff46.1632755552.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel•org>
---
arch/powerpc/kernel/head_40x.S | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index a1ae00689e0f4..aeb9bc9958749 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -27,6 +27,7 @@
#include <linux/init.h>
#include <linux/pgtable.h>
+#include <linux/sizes.h>
#include <asm/processor.h>
#include <asm/page.h>
#include <asm/mmu.h>
@@ -626,7 +627,7 @@ start_here:
b . /* prevent prefetch past rfi */
/* Set up the initial MMU state so we can do the first level of
- * kernel initialization. This maps the first 16 MBytes of memory 1:1
+ * kernel initialization. This maps the first 32 MBytes of memory 1:1
* virtual to physical and more importantly sets the cache mode.
*/
initial_mmu:
@@ -663,6 +664,12 @@ initial_mmu:
tlbwe r4,r0,TLB_DATA /* Load the data portion of the entry */
tlbwe r3,r0,TLB_TAG /* Load the tag portion of the entry */
+ li r0,62 /* TLB slot 62 */
+ addis r4,r4,SZ_16M@h
+ addis r3,r3,SZ_16M@h
+ tlbwe r4,r0,TLB_DATA /* Load the data portion of the entry */
+ tlbwe r3,r0,TLB_TAG /* Load the tag portion of the entry */
+
isync
/* Establish the exception vector base
--
2.34.1
next prev parent reply other threads:[~2022-01-17 17:23 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20220117170326.1471712-1-sashal@kernel.org>
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 03/34] powerpc/6xx: add missing of_node_put Sasha Levin
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 04/34] powerpc/powernv: " Sasha Levin
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 05/34] powerpc/cell: " Sasha Levin
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 06/34] powerpc/btext: " Sasha Levin
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 07/34] powerpc/watchdog: Fix missed watchdog reset due to memory ordering race Sasha Levin
2022-01-17 17:02 ` [PATCH AUTOSEL 5.10 09/34] powerpc/smp: Move setup_profiling_timer() under CONFIG_PROFILING Sasha Levin
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 12/34] powerpc/powermac: Add missing lockdep_register_key() Sasha Levin
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 13/34] KVM: PPC: Book3S: Suppress warnings when allocating too big memory slots Sasha Levin
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 14/34] KVM: PPC: Book3S: Suppress failed alloc warning in H_COPY_TOFROM_GUEST Sasha Levin
2022-01-17 17:03 ` Sasha Levin [this message]
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 22/34] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high Sasha Levin
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 23/34] powerpc: handle kdump appropriately with crash_kexec_post_notifiers option Sasha Levin
2022-01-17 17:03 ` [PATCH AUTOSEL 5.10 24/34] powerpc/fadump: Fix inaccurate CPU state info in vmcore generated with panic Sasha Levin
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