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0db5e02230
To split up APEIs in_nmi() path, the caller needs to always be in_nmi(). KVM shouldn't have to know about this, pull the RAS plumbing out into a header file. Currently guest synchronous external aborts are claimed as RAS notifications by handle_guest_sea(), which is hidden in the arch codes mm/fault.c. 32bit gets a dummy declaration in system_misc.h. There is going to be more of this in the future if/when the kernel supports the SError-based firmware-first notification mechanism and/or kernel-first notifications for both synchronous external abort and SError. Each of these will come with some Kconfig symbols and a handful of header files. Create a header file for all this. This patch gives handle_guest_sea() a 'kvm_' prefix, and moves the declarations to kvm_ras.h as preparation for a future patch that moves the ACPI-specific RAS code out of mm/fault.c. Signed-off-by: James Morse <james.morse@arm.com> Reviewed-by: Punit Agrawal <punit.agrawal@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Tested-by: Tyler Baicar <tbaicar@codeaurora.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_ARM_SYSTEM_MISC_H
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#define __ASM_ARM_SYSTEM_MISC_H
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#ifndef __ASSEMBLY__
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#include <linux/compiler.h>
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#include <linux/linkage.h>
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#include <linux/irqflags.h>
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#include <linux/reboot.h>
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#include <linux/percpu.h>
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extern void cpu_init(void);
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void soft_restart(unsigned long);
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extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd);
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extern void (*arm_pm_idle)(void);
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#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR
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typedef void (*harden_branch_predictor_fn_t)(void);
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DECLARE_PER_CPU(harden_branch_predictor_fn_t, harden_branch_predictor_fn);
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static inline void harden_branch_predictor(void)
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{
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harden_branch_predictor_fn_t fn = per_cpu(harden_branch_predictor_fn,
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smp_processor_id());
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if (fn)
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fn();
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}
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#else
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#define harden_branch_predictor() do { } while (0)
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#endif
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#define UDBG_UNDEFINED (1 << 0)
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#define UDBG_SYSCALL (1 << 1)
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#define UDBG_BADABORT (1 << 2)
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#define UDBG_SEGV (1 << 3)
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#define UDBG_BUS (1 << 4)
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extern unsigned int user_debug;
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#endif /* !__ASSEMBLY__ */
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#endif /* __ASM_ARM_SYSTEM_MISC_H */
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