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https://github.com/Fishwaldo/linux-bl808.git
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2eea7f067f
Based on the RFI patching. This is required to be able to disable the speculation barrier. Only one barrier type is supported and it does nothing when the firmware does not enable it. Also re-patching modules is not supported So the only meaningful thing that can be done is patching out the speculation barrier at boot when the user says it is not wanted. Signed-off-by: Michal Suchanek <msuchanek@suse.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
60 lines
1.7 KiB
C
60 lines
1.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_POWERPC_SETUP_H
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#define _ASM_POWERPC_SETUP_H
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#include <uapi/asm/setup.h>
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#ifndef __ASSEMBLY__
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extern void ppc_printk_progress(char *s, unsigned short hex);
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extern unsigned int rtas_data;
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extern unsigned long long memory_limit;
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extern unsigned long klimit;
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extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
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struct device_node;
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extern void note_scsi_host(struct device_node *, void *);
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/* Used in very early kernel initialization. */
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extern unsigned long reloc_offset(void);
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extern unsigned long add_reloc_offset(unsigned long);
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extern void reloc_got2(unsigned long);
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#define PTRRELOC(x) ((typeof(x)) add_reloc_offset((unsigned long)(x)))
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void check_for_initrd(void);
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void mem_topology_setup(void);
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void initmem_init(void);
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void setup_panic(void);
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#define ARCH_PANIC_TIMEOUT 180
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#ifdef CONFIG_PPC_PSERIES
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extern void pseries_enable_reloc_on_exc(void);
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extern void pseries_disable_reloc_on_exc(void);
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extern void pseries_big_endian_exceptions(void);
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extern void pseries_little_endian_exceptions(void);
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#else
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static inline void pseries_enable_reloc_on_exc(void) {}
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static inline void pseries_disable_reloc_on_exc(void) {}
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static inline void pseries_big_endian_exceptions(void) {}
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static inline void pseries_little_endian_exceptions(void) {}
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#endif /* CONFIG_PPC_PSERIES */
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void rfi_flush_enable(bool enable);
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/* These are bit flags */
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enum l1d_flush_type {
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L1D_FLUSH_NONE = 0x1,
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L1D_FLUSH_FALLBACK = 0x2,
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L1D_FLUSH_ORI = 0x4,
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L1D_FLUSH_MTTRIG = 0x8,
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};
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void setup_rfi_flush(enum l1d_flush_type, bool enable);
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void do_rfi_flush_fixups(enum l1d_flush_type types);
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void do_barrier_nospec_fixups(bool enable);
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_POWERPC_SETUP_H */
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