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x86/efi: Fix 32-bit fallout 

We do not enable the new efi memmap on 32-bit and thus we need to run
runtime_code_page_mkexec() unconditionally there. Fix that.

Reported-and-tested-by: Lejun Zhu <lejun.zhu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
This commit is contained in:
Borislav Petkov 2014-02-14 08:24:24 +01:00 committed by Matt Fleming
parent b28a960c42
commit c55d016f7a
4 changed files with 19 additions and 3 deletions
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2
arch/x86/include/asm/efi.h
View File

@ -132,6 +132,8 @@ extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
extern void efi_sync_low_kernel_mappings(void);
extern void efi_setup_page_tables(void);
extern void __init old_map_region(efi_memory_desc_t *md);
extern void __init runtime_code_page_mkexec(void);
extern void __init efi_runtime_mkexec(void);
struct efi_setup_data {
u64 fw_vendor;

5
arch/x86/platform/efi/efi.c
View File

@ -792,7 +792,7 @@ void __init efi_set_executable(efi_memory_desc_t *md, bool executable)
set_memory_nx(addr, npages);
}
static void __init runtime_code_page_mkexec(void)
void __init runtime_code_page_mkexec(void)
{
efi_memory_desc_t *md;
void *p;
@ -1069,8 +1069,7 @@ void __init efi_enter_virtual_mode(void)
efi.update_capsule = virt_efi_update_capsule;
efi.query_capsule_caps = virt_efi_query_capsule_caps;
if (efi_enabled(EFI_OLD_MEMMAP) && (__supported_pte_mask & _PAGE_NX))
runtime_code_page_mkexec();
efi_runtime_mkexec();
kfree(new_memmap);

6
arch/x86/platform/efi/efi_32.c
View File

@ -77,3 +77,9 @@ void efi_call_phys_epilog(void)
local_irq_restore(efi_rt_eflags);
}
void __init efi_runtime_mkexec(void)
{
if (__supported_pte_mask & _PAGE_NX)
runtime_code_page_mkexec();
}

9
arch/x86/platform/efi/efi_64.c
View File

@ -233,3 +233,12 @@ void __init parse_efi_setup(u64 phys_addr, u32 data_len)
{
efi_setup = phys_addr + sizeof(struct setup_data);
}
void __init efi_runtime_mkexec(void)
{
if (!efi_enabled(EFI_OLD_MEMMAP))
return;
if (__supported_pte_mask & _PAGE_NX)
runtime_code_page_mkexec();
}