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2023-12-11 1f93a7dfd1f8d5ff7a5c53246c7534fe2332d6f4

 kernel/arch/arm/mm/idmap.c
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@@ -3,11 +3,12 @@
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 #include <linux/kernel.h>
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 #include <linux/slab.h>
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 #include <linux/mm_types.h>
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+#include <linux/pgtable.h>
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 #include <asm/cputype.h>
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 #include <asm/idmap.h>
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+#include <asm/hwcap.h>
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 #include <asm/pgalloc.h>
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-#include <asm/pgtable.h>
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 #include <asm/sections.h>
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 #include <asm/system_info.h>
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@@ -67,7 +68,8 @@
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 static void idmap_add_pud(pgd_t *pgd, unsigned long addr, unsigned long end,
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 	unsigned long prot)
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 {
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-	pud_t *pud = pud_offset(pgd, addr);
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+	p4d_t *p4d = p4d_offset(pgd, addr);
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+	pud_t *pud = pud_offset(p4d, addr);
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 	unsigned long next;
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 	do {
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@@ -110,7 +112,8 @@
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 			     __idmap_text_end, 0);
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 	/* Flush L1 for the hardware to see this page table content */
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-	flush_cache_louis();
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+	if (!(elf_hwcap & HWCAP_LPAE))
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+		flush_cache_louis();
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 	return 0;
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 }