disable pwm7

hc

2024-05-10 23fa18eaa71266feff7ba8d83022d9e1cc83c65a

 kernel/arch/x86/boot/compressed/pgtable_64.c
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@@ -5,17 +5,15 @@
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 #include "pgtable.h"
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 #include "../string.h"
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-/*
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- * __force_order is used by special_insns.h asm code to force instruction
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- * serialization.
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- *
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- * It is not referenced from the code, but GCC < 5 with -fPIE would fail
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- * due to an undefined symbol. Define it to make these ancient GCCs work.
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- */
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-unsigned long __force_order;
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-
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 #define BIOS_START_MIN		0x20000U	/* 128K, less than this is insane */
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 #define BIOS_START_MAX		0x9f000U	/* 640K, absolute maximum */
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+
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+#ifdef CONFIG_X86_5LEVEL
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+/* __pgtable_l5_enabled needs to be in .data to avoid being cleared along with .bss */
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+unsigned int __section(".data") __pgtable_l5_enabled;
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+unsigned int __section(".data") pgdir_shift = 39;
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+unsigned int __section(".data") ptrs_per_p4d = 1;
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+#endif
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 struct paging_config {
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 	unsigned long trampoline_start;
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@@ -32,7 +30,7 @@
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  * Avoid putting the pointer into .bss as it will be cleared between
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  * paging_prepare() and extract_kernel().
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  */
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-unsigned long *trampoline_32bit __section(.data);
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+unsigned long *trampoline_32bit __section(".data");
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 extern struct boot_params *boot_params;
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 int cmdline_find_option_bool(const char *option);
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@@ -40,7 +38,6 @@
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 static unsigned long find_trampoline_placement(void)
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 {
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 	unsigned long bios_start = 0, ebda_start = 0;
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-	unsigned long trampoline_start;
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 	struct boot_e820_entry *entry;
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 	char *signature;
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 	int i;
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@@ -208,4 +205,13 @@
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 	/* Restore trampoline memory */
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 	memcpy(trampoline_32bit, trampoline_save, TRAMPOLINE_32BIT_SIZE);
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+
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+	/* Initialize variables for 5-level paging */
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+#ifdef CONFIG_X86_5LEVEL
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+	if (__read_cr4() & X86_CR4_LA57) {
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+		__pgtable_l5_enabled = 1;
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+		pgdir_shift = 48;
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+		ptrs_per_p4d = 512;
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+	}
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+#endif
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 }