[tip:x86/mm] x86/acpi: Add a new x86_init_acpi structure to x86_init_ops

From: tip-bot for Juergen Gross
Date: Mon Feb 26 2018 - 03:48:15 EST


Commit-ID: 038bac2b02989acf1fc938cedcb7944c02672b9f
Gitweb: https://git.kernel.org/tip/038bac2b02989acf1fc938cedcb7944c02672b9f
Author: Juergen Gross <jgross@xxxxxxxx>
AuthorDate: Mon, 19 Feb 2018 11:09:05 +0100
Committer: Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Mon, 26 Feb 2018 08:43:20 +0100

x86/acpi: Add a new x86_init_acpi structure to x86_init_ops

Add a new struct x86_init_acpi to x86_init_ops. For now it contains
only one init function to get the RSDP table address.

Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Acked-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@xxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Eric Biederman <ebiederm@xxxxxxxxxxxx>
Cc: H. Peter Anvin <hpa@xxxxxxxxx>
Cc: Kees Cook <keescook@xxxxxxxxxxxx>
Cc: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: boris.ostrovsky@xxxxxxxxxx
Cc: lenb@xxxxxxxxxx
Cc: linux-acpi@xxxxxxxxxxxxxxx
Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/20180219100906.14265-3-jgross@xxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
arch/x86/include/asm/acpi.h | 7 +++++++
arch/x86/include/asm/x86_init.h | 9 +++++++++
arch/x86/kernel/x86_init.c | 5 +++++
3 files changed, 21 insertions(+)

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
index 11881726ed37..6609dd7289b5 100644
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -31,6 +31,7 @@
#include <asm/mmu.h>
#include <asm/mpspec.h>
#include <asm/realmode.h>
+#include <asm/x86_init.h>

#ifdef CONFIG_ACPI_APEI
# include <asm/pgtable_types.h>
@@ -133,6 +134,12 @@ static inline bool acpi_has_cpu_in_madt(void)
return !!acpi_lapic;
}

+#define ACPI_HAVE_ARCH_GET_ROOT_POINTER
+static inline u64 acpi_arch_get_root_pointer(void)
+{
+ return x86_init.acpi.get_root_pointer();
+}
+
#else /* !CONFIG_ACPI */

#define acpi_lapic 0
diff --git a/arch/x86/include/asm/x86_init.h b/arch/x86/include/asm/x86_init.h
index fc2f082ac635..2e2c34d2bb00 100644
--- a/arch/x86/include/asm/x86_init.h
+++ b/arch/x86/include/asm/x86_init.h
@@ -130,6 +130,14 @@ struct x86_hyper_init {
void (*init_mem_mapping)(void);
};

+/**
+ * struct x86_init_acpi - x86 ACPI init functions
+ * @get_root_pointer: get RSDP address
+ */
+struct x86_init_acpi {
+ u64 (*get_root_pointer)(void);
+};
+
/**
* struct x86_init_ops - functions for platform specific setup
*
@@ -144,6 +152,7 @@ struct x86_init_ops {
struct x86_init_iommu iommu;
struct x86_init_pci pci;
struct x86_hyper_init hyper;
+ struct x86_init_acpi acpi;
};

/**
diff --git a/arch/x86/kernel/x86_init.c b/arch/x86/kernel/x86_init.c
index 1151ccd72ce9..9e4e994a4836 100644
--- a/arch/x86/kernel/x86_init.c
+++ b/arch/x86/kernel/x86_init.c
@@ -30,6 +30,7 @@ int __init iommu_init_noop(void) { return 0; }
void iommu_shutdown_noop(void) { }
bool __init bool_x86_init_noop(void) { return false; }
void x86_op_int_noop(int cpu) { }
+u64 u64_x86_init_noop(void) { return 0; }

/*
* The platform setup functions are preset with the default functions
@@ -91,6 +92,10 @@ struct x86_init_ops x86_init __initdata = {
.x2apic_available = bool_x86_init_noop,
.init_mem_mapping = x86_init_noop,
},
+
+ .acpi = {
+ .get_root_pointer = u64_x86_init_noop,
+ },
};

struct x86_cpuinit_ops x86_cpuinit = {