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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/arch/mips/include/asm/maar.h
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@@ -1,11 +1,7 @@
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+/* SPDX-License-Identifier: GPL-2.0-or-later */
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 /*
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  * Copyright (C) 2014 Imagination Technologies
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  * Author: Paul Burton <paul.burton@mips.com>
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- *
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- * This program is free software; you can redistribute it and/or modify it
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- * under the terms of the GNU General Public License as published by the
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- * Free Software Foundation;  either version 2 of the  License, or (at your
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- * option) any later version.
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  */
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 #ifndef __MIPS_ASM_MIPS_MAAR_H__
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@@ -36,7 +32,7 @@
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  * @upper:	The highest address that the MAAR pair will affect. Must be
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  *		aligned to one byte before a 2^16 byte boundary.
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  * @attrs:	The accessibility attributes to program, eg. MIPS_MAAR_S. The
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- *		MIPS_MAAR_VL attribute will automatically be set.
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+ *		MIPS_MAAR_VL/MIPS_MAAR_VH attributes will automatically be set.
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  *
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  * Program the pair of MAAR registers specified by idx to apply the attributes
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  * specified by attrs to the range of addresses from lower to higher.
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@@ -52,17 +48,30 @@
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 	/* Automatically set MIPS_MAAR_VL */
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 	attrs |= MIPS_MAAR_VL;
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-	/* Write the upper address & attributes (only MIPS_MAAR_VL matters) */
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+	/*
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+	 * Write the upper address & attributes (both MIPS_MAAR_VL and
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+	 * MIPS_MAAR_VH matter)
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+	 */
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 	write_c0_maari(idx << 1);
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 	back_to_back_c0_hazard();
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 	write_c0_maar(((upper >> 4) & MIPS_MAAR_ADDR) | attrs);
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 	back_to_back_c0_hazard();
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+#ifdef CONFIG_XPA
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+	upper >>= MIPS_MAARX_ADDR_SHIFT;
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+	writex_c0_maar(((upper >> 4) & MIPS_MAARX_ADDR) | MIPS_MAARX_VH);
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+	back_to_back_c0_hazard();
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+#endif
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 	/* Write the lower address & attributes */
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 	write_c0_maari((idx << 1) | 0x1);
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 	back_to_back_c0_hazard();
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 	write_c0_maar((lower >> 4) | attrs);
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 	back_to_back_c0_hazard();
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+#ifdef CONFIG_XPA
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+	lower >>= MIPS_MAARX_ADDR_SHIFT;
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+	writex_c0_maar(((lower >> 4) & MIPS_MAARX_ADDR) | MIPS_MAARX_VH);
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+	back_to_back_c0_hazard();
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+#endif
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 }
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 /**