diff options
Diffstat (limited to 'arch/x86/platform/efi')
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 54 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_stub_32.S | 4 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_stub_64.S | 4 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_thunk_64.S | 16 | ||||
| -rw-r--r-- | arch/x86/platform/efi/quirks.c | 3 |
5 files changed, 65 insertions, 16 deletions
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index 425e025341db..38d44f36d5ed 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -128,6 +128,9 @@ void __init efi_find_mirror(void) efi_memory_desc_t *md; u64 mirror_size = 0, total_size = 0; + if (!efi_enabled(EFI_MEMMAP)) + return; + for_each_efi_memory_desc(md) { unsigned long long start = md->phys_addr; unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; @@ -145,14 +148,18 @@ void __init efi_find_mirror(void) /* * Tell the kernel about the EFI memory map. This might include - * more than the max 128 entries that can fit in the e820 legacy - * (zeropage) memory map. + * more than the max 128 entries that can fit in the passed in e820 + * legacy (zeropage) memory map, but the kernel's e820 table can hold + * E820_MAX_ENTRIES. */ static void __init do_add_efi_memmap(void) { efi_memory_desc_t *md; + if (!efi_enabled(EFI_MEMMAP)) + return; + for_each_efi_memory_desc(md) { unsigned long long start = md->phys_addr; unsigned long long size = md->num_pages << EFI_PAGE_SHIFT; @@ -164,7 +171,10 @@ static void __init do_add_efi_memmap(void) case EFI_BOOT_SERVICES_CODE: case EFI_BOOT_SERVICES_DATA: case EFI_CONVENTIONAL_MEMORY: - if (md->attribute & EFI_MEMORY_WB) + if (efi_soft_reserve_enabled() + && (md->attribute & EFI_MEMORY_SP)) + e820_type = E820_TYPE_SOFT_RESERVED; + else if (md->attribute & EFI_MEMORY_WB) e820_type = E820_TYPE_RAM; else e820_type = E820_TYPE_RESERVED; @@ -190,11 +200,36 @@ static void __init do_add_efi_memmap(void) e820_type = E820_TYPE_RESERVED; break; } + e820__range_add(start, size, e820_type); } e820__update_table(e820_table); } +/* + * Given add_efi_memmap defaults to 0 and there there is no alternative + * e820 mechanism for soft-reserved memory, import the full EFI memory + * map if soft reservations are present and enabled. Otherwise, the + * mechanism to disable the kernel's consideration of EFI_MEMORY_SP is + * the efi=nosoftreserve option. + */ +static bool do_efi_soft_reserve(void) +{ + efi_memory_desc_t *md; + + if (!efi_enabled(EFI_MEMMAP)) + return false; + + if (!efi_soft_reserve_enabled()) + return false; + + for_each_efi_memory_desc(md) + if (md->type == EFI_CONVENTIONAL_MEMORY && + (md->attribute & EFI_MEMORY_SP)) + return true; + return false; +} + int __init efi_memblock_x86_reserve_range(void) { struct efi_info *e = &boot_params.efi_info; @@ -224,9 +259,11 @@ int __init efi_memblock_x86_reserve_range(void) if (rv) return rv; - if (add_efi_memmap) + if (add_efi_memmap || do_efi_soft_reserve()) do_add_efi_memmap(); + efi_fake_memmap_early(); + WARN(efi.memmap.desc_version != 1, "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", efi.memmap.desc_version); @@ -779,6 +816,15 @@ static bool should_map_region(efi_memory_desc_t *md) return false; /* + * EFI specific purpose memory may be reserved by default + * depending on kernel config and boot options. + */ + if (md->type == EFI_CONVENTIONAL_MEMORY && + efi_soft_reserve_enabled() && + (md->attribute & EFI_MEMORY_SP)) + return false; + + /* * Map all of RAM so that we can access arguments in the 1:1 * mapping when making EFI runtime calls. */ diff --git a/arch/x86/platform/efi/efi_stub_32.S b/arch/x86/platform/efi/efi_stub_32.S index ab2e91e76894..eed8b5b441f8 100644 --- a/arch/x86/platform/efi/efi_stub_32.S +++ b/arch/x86/platform/efi/efi_stub_32.S @@ -22,7 +22,7 @@ */ .text -ENTRY(efi_call_phys) +SYM_FUNC_START(efi_call_phys) /* * 0. The function can only be called in Linux kernel. So CS has been * set to 0x0010, DS and SS have been set to 0x0018. In EFI, I found @@ -114,7 +114,7 @@ ENTRY(efi_call_phys) movl (%edx), %ecx pushl %ecx ret -ENDPROC(efi_call_phys) +SYM_FUNC_END(efi_call_phys) .previous .data diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S index 74628ec78f29..b1d2313fe3bf 100644 --- a/arch/x86/platform/efi/efi_stub_64.S +++ b/arch/x86/platform/efi/efi_stub_64.S @@ -39,7 +39,7 @@ mov %rsi, %cr0; \ mov (%rsp), %rsp -ENTRY(efi_call) +SYM_FUNC_START(efi_call) pushq %rbp movq %rsp, %rbp SAVE_XMM @@ -55,4 +55,4 @@ ENTRY(efi_call) RESTORE_XMM popq %rbp ret -ENDPROC(efi_call) +SYM_FUNC_END(efi_call) diff --git a/arch/x86/platform/efi/efi_thunk_64.S b/arch/x86/platform/efi/efi_thunk_64.S index 46c58b08739c..3189f1394701 100644 --- a/arch/x86/platform/efi/efi_thunk_64.S +++ b/arch/x86/platform/efi/efi_thunk_64.S @@ -25,7 +25,7 @@ .text .code64 -ENTRY(efi64_thunk) +SYM_FUNC_START(efi64_thunk) push %rbp push %rbx @@ -60,14 +60,14 @@ ENTRY(efi64_thunk) pop %rbx pop %rbp retq -ENDPROC(efi64_thunk) +SYM_FUNC_END(efi64_thunk) /* * We run this function from the 1:1 mapping. * * This function must be invoked with a 1:1 mapped stack. */ -ENTRY(__efi64_thunk) +SYM_FUNC_START_LOCAL(__efi64_thunk) movl %ds, %eax push %rax movl %es, %eax @@ -114,14 +114,14 @@ ENTRY(__efi64_thunk) or %rcx, %rax 1: ret -ENDPROC(__efi64_thunk) +SYM_FUNC_END(__efi64_thunk) -ENTRY(efi_exit32) +SYM_FUNC_START_LOCAL(efi_exit32) movq func_rt_ptr(%rip), %rax push %rax mov %rdi, %rax ret -ENDPROC(efi_exit32) +SYM_FUNC_END(efi_exit32) .code32 /* @@ -129,7 +129,7 @@ ENDPROC(efi_exit32) * * The stack should represent the 32-bit calling convention. */ -ENTRY(efi_enter32) +SYM_FUNC_START_LOCAL(efi_enter32) movl $__KERNEL_DS, %eax movl %eax, %ds movl %eax, %es @@ -145,7 +145,7 @@ ENTRY(efi_enter32) pushl %eax lret -ENDPROC(efi_enter32) +SYM_FUNC_END(efi_enter32) .data .balign 8 diff --git a/arch/x86/platform/efi/quirks.c b/arch/x86/platform/efi/quirks.c index 3b9fd679cea9..7675cf754d90 100644 --- a/arch/x86/platform/efi/quirks.c +++ b/arch/x86/platform/efi/quirks.c @@ -320,6 +320,9 @@ void __init efi_reserve_boot_services(void) { efi_memory_desc_t *md; + if (!efi_enabled(EFI_MEMMAP)) + return; + for_each_efi_memory_desc(md) { u64 start = md->phys_addr; u64 size = md->num_pages << EFI_PAGE_SHIFT; |