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x86/hyperv: Enable build of hypervisor crashdump collection files

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Enable build of the new files introduced in the earlier commits and add
call to do the setup during boot.

Signed-off-by: Mukesh Rathor <mrathor@linux.microsoft.com>
[ wei: fix build ]
Signed-off-by: Wei Liu <wei.liu@kernel.org>
This commit is contained in:
Mukesh Rathor 2025-10-06 15:42:08 -07:00 committed by Wei Liu
parent 94212d3461
commit 77c860d2db
3 changed files with 16 additions and 0 deletions
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6
arch/x86/hyperv/Makefile
View File

@ -5,4 +5,10 @@ obj-$(CONFIG_HYPERV_VTL_MODE) += hv_vtl.o
ifdef CONFIG_X86_64 ifdef CONFIG_X86_64
obj-$(CONFIG_PARAVIRT_SPINLOCKS) += hv_spinlock.o obj-$(CONFIG_PARAVIRT_SPINLOCKS) += hv_spinlock.o
ifdef CONFIG_MSHV_ROOT
CFLAGS_REMOVE_hv_trampoline.o += -pg
CFLAGS_hv_trampoline.o += -fno-stack-protector
obj-$(CONFIG_CRASH_DUMP) += hv_crash.o hv_trampoline.o
endif
endif endif

1
arch/x86/hyperv/hv_init.c
View File

@ -554,6 +554,7 @@ void __init hyperv_init(void)
memunmap(src); memunmap(src);
hv_remap_tsc_clocksource(); hv_remap_tsc_clocksource();
hv_root_crash_init();
} else { } else {
hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg); hypercall_msr.guest_physical_address = vmalloc_to_pfn(hv_hypercall_pg);
wrmsrq(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); wrmsrq(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64);

9
arch/x86/include/asm/mshyperv.h
View File

@ -237,6 +237,15 @@ static __always_inline u64 hv_raw_get_msr(unsigned int reg)
} }
int hv_apicid_to_vp_index(u32 apic_id); int hv_apicid_to_vp_index(u32 apic_id);
#if IS_ENABLED(CONFIG_MSHV_ROOT) && IS_ENABLED(CONFIG_CRASH_DUMP)
void hv_root_crash_init(void);
void hv_crash_asm32(void);
void hv_crash_asm64(void);
void hv_crash_asm_end(void);
#else /* CONFIG_MSHV_ROOT && CONFIG_CRASH_DUMP */
static inline void hv_root_crash_init(void) {}
#endif /* CONFIG_MSHV_ROOT && CONFIG_CRASH_DUMP */
#else /* CONFIG_HYPERV */ #else /* CONFIG_HYPERV */
static inline void hyperv_init(void) {} static inline void hyperv_init(void) {}
static inline void hyperv_setup_mmu_ops(void) {} static inline void hyperv_setup_mmu_ops(void) {}