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x86/mtrr: Remove the mtrr_bp_init() stub

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Add an IS_ENABLED() check in setup_arch() and call pat_disable()
directly if MTRRs are not supported. This allows to remove the
<asm/memtype.h> include in <asm/mtrr.h>, which pull in lowlevel x86
headers that should not be included for UML builds and will cause build
warnings with a following patch.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211215165612.554426-2-hch@lst.de
This commit is contained in:
Christoph Hellwig 2021-12-15 17:56:11 +01:00 committed by Borislav Petkov
parent c494eb366d
commit 4d5cff69fb
3 changed files with 8 additions and 8 deletions
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8
arch/x86/include/asm/mtrr.h
View file

@ -24,8 +24,8 @@
#define _ASM_X86_MTRR_H
#include <uapi/asm/mtrr.h>
#include <asm/memtype.h>
void mtrr_bp_init(void);
/*
* The following functions are for use by other drivers that cannot use
@ -43,7 +43,6 @@ extern int mtrr_del(int reg, unsigned long base, unsigned long size);
extern int mtrr_del_page(int reg, unsigned long base, unsigned long size);
extern void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi);
extern void mtrr_ap_init(void);
extern void mtrr_bp_init(void);
extern void set_mtrr_aps_delayed_init(void);
extern void mtrr_aps_init(void);
extern void mtrr_bp_restore(void);
@ -84,11 +83,6 @@ static inline int mtrr_trim_uncached_memory(unsigned long end_pfn)
static inline void mtrr_centaur_report_mcr(int mcr, u32 lo, u32 hi)
{
}
static inline void mtrr_bp_init(void)
{
pat_disable("PAT support disabled because CONFIG_MTRR is disabled in the kernel.");
}
#define mtrr_ap_init() do {} while (0)
#define set_mtrr_aps_delayed_init() do {} while (0)
#define mtrr_aps_init() do {} while (0)

7
arch/x86/kernel/setup.c
View file

@ -40,6 +40,7 @@
#include <asm/kasan.h>
#include <asm/kaslr.h>
#include <asm/mce.h>
#include <asm/memtype.h>
#include <asm/mtrr.h>
#include <asm/realmode.h>
#include <asm/olpc_ofw.h>
@ -979,7 +980,11 @@ void __init setup_arch(char **cmdline_p)
max_pfn = e820__end_of_ram_pfn();
/* update e820 for memory not covered by WB MTRRs */
mtrr_bp_init();
if (IS_ENABLED(CONFIG_MTRR))
mtrr_bp_init();
else
pat_disable("PAT support disabled because CONFIG_MTRR is disabled in the kernel.");
if (mtrr_trim_uncached_memory(max_pfn))
max_pfn = e820__end_of_ram_pfn();

1
arch/x86/kvm/mmu/spte.c
View file

@ -16,6 +16,7 @@
#include "spte.h"
#include <asm/e820/api.h>
#include <asm/memtype.h>
#include <asm/vmx.h>
static bool __read_mostly enable_mmio_caching = true;