linux-kernel - [PATCH v3 04/23] arm64: Move MAIR_EL1

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Date:   Thu, 26 Nov 2020 15:54:02 +0000
From:   David Brazdil <dbrazdil@...gle.com>
To:     kvmarm@...ts.cs.columbia.edu
Cc:     Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>,
        James Morse <james.morse@....com>,
        Julien Thierry <julien.thierry.kdev@...il.com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Dennis Zhou <dennis@...nel.org>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Mark Rutland <mark.rutland@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Sudeep Holla <sudeep.holla@....com>, linux-doc@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        kernel-team@...roid.com, David Brazdil <dbrazdil@...gle.com>
Subject: [PATCH v3 04/23] arm64: Move MAIR_EL1_SET to asm/memory.h

KVM currently initializes MAIR_EL2 to the value of MAIR_EL1. In
preparation for initializing MAIR_EL2 before MAIR_EL1, move the constant
into a shared header file. Since it is used for EL1 and EL2, rename to
MAIR_ELx_SET.

Signed-off-by: David Brazdil <dbrazdil@...gle.com>
---
 arch/arm64/include/asm/memory.h | 13 +++++++++++++
 arch/arm64/mm/proc.S            | 15 +--------------
 2 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index cd61239bae8c..54a22cb5b17b 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -152,6 +152,19 @@
 #define MT_S2_FWB_NORMAL	6
 #define MT_S2_FWB_DEVICE_nGnRE	1
 
+/*
+ * Default MAIR_ELx. MT_NORMAL_TAGGED is initially mapped as Normal memory and
+ * changed during __cpu_setup to Normal Tagged if the system supports MTE.
+ */
+#define MAIR_ELx_SET							\
+	(MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) |	\
+	 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) |	\
+	 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_GRE, MT_DEVICE_GRE) |		\
+	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) |		\
+	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) |			\
+	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT) |		\
+	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL_TAGGED))
+
 #ifdef CONFIG_ARM64_4K_PAGES
 #define IOREMAP_MAX_ORDER	(PUD_SHIFT)
 #else
diff --git a/arch/arm64/mm/proc.S b/arch/arm64/mm/proc.S
index 23c326a06b2d..e3b9aa372b96 100644
--- a/arch/arm64/mm/proc.S
+++ b/arch/arm64/mm/proc.S
@@ -45,19 +45,6 @@
 #define TCR_KASAN_FLAGS 0
 #endif
 
-/*
- * Default MAIR_EL1. MT_NORMAL_TAGGED is initially mapped as Normal memory and
- * changed during __cpu_setup to Normal Tagged if the system supports MTE.
- */
-#define MAIR_EL1_SET							\
-	(MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRnE, MT_DEVICE_nGnRnE) |	\
-	 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_nGnRE, MT_DEVICE_nGnRE) |	\
-	 MAIR_ATTRIDX(MAIR_ATTR_DEVICE_GRE, MT_DEVICE_GRE) |		\
-	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_NC, MT_NORMAL_NC) |		\
-	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL) |			\
-	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL_WT, MT_NORMAL_WT) |		\
-	 MAIR_ATTRIDX(MAIR_ATTR_NORMAL, MT_NORMAL_TAGGED))
-
 #ifdef CONFIG_CPU_PM
 /**
  * cpu_do_suspend - save CPU registers context
@@ -425,7 +412,7 @@ SYM_FUNC_START(__cpu_setup)
 	/*
 	 * Memory region attributes
 	 */
-	mov_q	x5, MAIR_EL1_SET
+	mov_q	x5, MAIR_ELx_SET
 #ifdef CONFIG_ARM64_MTE
 	/*
 	 * Update MAIR_EL1, GCR_EL1 and TFSR*_EL1 if MTE is supported
-- 
2.29.2.454.gaff20da3a2-goog