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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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1fec053369
Add a new setup_data type SETUP_EFI for kexec use. Passing the saved fw_vendor, runtime, config tables and EFI runtime mappings. When entering virtual mode, directly mapping the EFI runtime regions which we passed in previously. And skip the step to call SetVirtualAddressMap(). Specially for HP z420 workstation we need save the smbios physical address. The kernel boot sequence proceeds in the following order. Step 2 requires efi.smbios to be the physical address. However, I found that on HP z420 EFI system table has a virtual address of SMBIOS in step 1. Hence, we need set it back to the physical address with the smbios in efi_setup_data. (When it is still the physical address, it simply sets the same value.) 1. efi_init() - Set efi.smbios from EFI system table 2. dmi_scan_machine() - Temporary map efi.smbios to access SMBIOS table 3. efi_enter_virtual_mode() - Map EFI ranges Tested on ovmf+qemu, lenovo thinkpad, a dell laptop and an HP z420 workstation. Signed-off-by: Dave Young <dyoung@redhat.com> Tested-by: Toshi Kani <toshi.kani@hp.com> Signed-off-by: Matt Fleming <matt.fleming@intel.com>
171 lines
5.8 KiB
C
171 lines
5.8 KiB
C
#ifndef _ASM_X86_EFI_H
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#define _ASM_X86_EFI_H
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/*
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* We map the EFI regions needed for runtime services non-contiguously,
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* with preserved alignment on virtual addresses starting from -4G down
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* for a total max space of 64G. This way, we provide for stable runtime
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* services addresses across kernels so that a kexec'd kernel can still
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* use them.
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*
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* This is the main reason why we're doing stable VA mappings for RT
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* services.
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*
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* This flag is used in conjuction with a chicken bit called
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* "efi=old_map" which can be used as a fallback to the old runtime
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* services mapping method in case there's some b0rkage with a
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* particular EFI implementation (haha, it is hard to hold up the
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* sarcasm here...).
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*/
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#define EFI_OLD_MEMMAP EFI_ARCH_1
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#ifdef CONFIG_X86_32
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#define EFI_LOADER_SIGNATURE "EL32"
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extern unsigned long asmlinkage efi_call_phys(void *, ...);
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#define efi_call_phys0(f) efi_call_phys(f)
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#define efi_call_phys1(f, a1) efi_call_phys(f, a1)
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#define efi_call_phys2(f, a1, a2) efi_call_phys(f, a1, a2)
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#define efi_call_phys3(f, a1, a2, a3) efi_call_phys(f, a1, a2, a3)
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call_phys(f, a1, a2, a3, a4)
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call_phys(f, a1, a2, a3, a4, a5)
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_phys(f, a1, a2, a3, a4, a5, a6)
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/*
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* Wrap all the virtual calls in a way that forces the parameters on the stack.
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*/
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#define efi_call_virt(f, args...) \
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((efi_##f##_t __attribute__((regparm(0)))*)efi.systab->runtime->f)(args)
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#define efi_call_virt0(f) efi_call_virt(f)
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#define efi_call_virt1(f, a1) efi_call_virt(f, a1)
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#define efi_call_virt2(f, a1, a2) efi_call_virt(f, a1, a2)
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#define efi_call_virt3(f, a1, a2, a3) efi_call_virt(f, a1, a2, a3)
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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efi_call_virt(f, a1, a2, a3, a4)
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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efi_call_virt(f, a1, a2, a3, a4, a5)
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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efi_call_virt(f, a1, a2, a3, a4, a5, a6)
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#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
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#else /* !CONFIG_X86_32 */
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#define EFI_LOADER_SIGNATURE "EL64"
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extern u64 efi_call0(void *fp);
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extern u64 efi_call1(void *fp, u64 arg1);
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extern u64 efi_call2(void *fp, u64 arg1, u64 arg2);
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extern u64 efi_call3(void *fp, u64 arg1, u64 arg2, u64 arg3);
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extern u64 efi_call4(void *fp, u64 arg1, u64 arg2, u64 arg3, u64 arg4);
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extern u64 efi_call5(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5);
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extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
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u64 arg4, u64 arg5, u64 arg6);
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#define efi_call_phys0(f) \
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efi_call0((f))
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#define efi_call_phys1(f, a1) \
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efi_call1((f), (u64)(a1))
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#define efi_call_phys2(f, a1, a2) \
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efi_call2((f), (u64)(a1), (u64)(a2))
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#define efi_call_phys3(f, a1, a2, a3) \
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efi_call3((f), (u64)(a1), (u64)(a2), (u64)(a3))
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#define efi_call_phys4(f, a1, a2, a3, a4) \
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efi_call4((f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4))
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#define efi_call_phys5(f, a1, a2, a3, a4, a5) \
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efi_call5((f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5))
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#define efi_call_phys6(f, a1, a2, a3, a4, a5, a6) \
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efi_call6((f), (u64)(a1), (u64)(a2), (u64)(a3), \
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(u64)(a4), (u64)(a5), (u64)(a6))
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#define _efi_call_virtX(x, f, ...) \
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({ \
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efi_status_t __s; \
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\
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efi_sync_low_kernel_mappings(); \
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preempt_disable(); \
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__s = efi_call##x((void *)efi.systab->runtime->f, __VA_ARGS__); \
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preempt_enable(); \
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__s; \
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})
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#define efi_call_virt0(f) \
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_efi_call_virtX(0, f)
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#define efi_call_virt1(f, a1) \
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_efi_call_virtX(1, f, (u64)(a1))
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#define efi_call_virt2(f, a1, a2) \
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_efi_call_virtX(2, f, (u64)(a1), (u64)(a2))
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#define efi_call_virt3(f, a1, a2, a3) \
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_efi_call_virtX(3, f, (u64)(a1), (u64)(a2), (u64)(a3))
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#define efi_call_virt4(f, a1, a2, a3, a4) \
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_efi_call_virtX(4, f, (u64)(a1), (u64)(a2), (u64)(a3), (u64)(a4))
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#define efi_call_virt5(f, a1, a2, a3, a4, a5) \
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_efi_call_virtX(5, f, (u64)(a1), (u64)(a2), (u64)(a3), (u64)(a4), (u64)(a5))
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#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
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_efi_call_virtX(6, f, (u64)(a1), (u64)(a2), (u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
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extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
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u32 type, u64 attribute);
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#endif /* CONFIG_X86_32 */
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extern int add_efi_memmap;
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extern unsigned long x86_efi_facility;
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extern struct efi_scratch efi_scratch;
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extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
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extern int efi_memblock_x86_reserve_range(void);
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extern void efi_call_phys_prelog(void);
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extern void efi_call_phys_epilog(void);
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extern void efi_unmap_memmap(void);
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extern void efi_memory_uc(u64 addr, unsigned long size);
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extern void __init efi_map_region(efi_memory_desc_t *md);
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extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
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extern void efi_sync_low_kernel_mappings(void);
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extern void efi_setup_page_tables(void);
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extern void __init old_map_region(efi_memory_desc_t *md);
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struct efi_setup_data {
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u64 fw_vendor;
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u64 runtime;
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u64 tables;
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u64 smbios;
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u64 reserved[8];
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};
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extern u64 efi_setup;
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extern u32 efi_data_len;
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extern void parse_efi_setup(u64 phys_addr, u32 data_len);
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#ifdef CONFIG_EFI
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static inline bool efi_is_native(void)
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{
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return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
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}
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extern struct console early_efi_console;
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#else
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/*
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* IF EFI is not configured, have the EFI calls return -ENOSYS.
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*/
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#define efi_call0(_f) (-ENOSYS)
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#define efi_call1(_f, _a1) (-ENOSYS)
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#define efi_call2(_f, _a1, _a2) (-ENOSYS)
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#define efi_call3(_f, _a1, _a2, _a3) (-ENOSYS)
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#define efi_call4(_f, _a1, _a2, _a3, _a4) (-ENOSYS)
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#define efi_call5(_f, _a1, _a2, _a3, _a4, _a5) (-ENOSYS)
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#define efi_call6(_f, _a1, _a2, _a3, _a4, _a5, _a6) (-ENOSYS)
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#endif /* CONFIG_EFI */
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#endif /* _ASM_X86_EFI_H */
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