修改GPIO导出默认初始值

hc

2024-10-16 50a212ec906f7524620675f0c57357691c26c81f

 kernel/arch/x86/kernel/apic/x2apic_phys.c
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@@ -1,14 +1,9 @@
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 // SPDX-License-Identifier: GPL-2.0
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-#include <linux/threads.h>
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-#include <linux/cpumask.h>
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-#include <linux/string.h>
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-#include <linux/kernel.h>
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-#include <linux/ctype.h>
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-#include <linux/dmar.h>
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-#include <asm/smp.h>
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-#include <asm/ipi.h>
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-#include "x2apic.h"
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+#include <linux/cpumask.h>
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+#include <linux/acpi.h>
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+
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+#include "local.h"
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 int x2apic_phys;
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9
 
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@@ -88,12 +83,12 @@
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 static void x2apic_send_IPI_allbutself(int vector)
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 {
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-	__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLBUT);
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+	__x2apic_send_IPI_shorthand(vector, APIC_DEST_ALLBUT);
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 }
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 static void x2apic_send_IPI_all(int vector)
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 {
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-	__x2apic_send_IPI_mask(cpu_online_mask, vector, APIC_DEST_ALLINC);
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+	__x2apic_send_IPI_shorthand(vector, APIC_DEST_ALLINC);
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 }
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 static void init_x2apic_ldr(void)
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@@ -102,7 +97,10 @@
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 static int x2apic_phys_probe(void)
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 {
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-	if (x2apic_mode && (x2apic_phys || x2apic_fadt_phys()))
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+	if (!x2apic_mode)
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+		return 0;
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+
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+	if (x2apic_phys || x2apic_fadt_phys())
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 		return 1;
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 	return apic == &apic_x2apic_phys;
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@@ -128,6 +126,15 @@
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 	native_x2apic_icr_write(cfg, apicid);
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 }
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+void __x2apic_send_IPI_shorthand(int vector, u32 which)
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+{
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+	unsigned long cfg = __prepare_ICR(which, vector, 0);
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+
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+	/* x2apic MSRs are special and need a special fence: */
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+	weak_wrmsr_fence();
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+	native_x2apic_icr_write(cfg, 0);
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+}
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+
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 unsigned int x2apic_get_apic_id(unsigned long id)
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 {
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 	return id;