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efi: Move UGA and PROP table handling to x86 code

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The UGA table is x86 specific (its handling was introduced when the
EFI support code was modified to accommodate IA32), so there is no
need to handle it in generic code.

The EFI properties table is not strictly x86 specific, but it was
deprecated almost immediately after having been introduced, due to
implementation difficulties. Only x86 takes it into account today,
and this is not going to change, so make this table x86 only as well.

Tested-by: Tony Luck <tony.luck@intel.com> # arch/ia64
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel
2020-01-19 16:17:59 +01:00
parent 120540f230
commit fd506e0cf9
3 changed files with 31 additions and 28 deletions
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32
arch/x86/platform/efi/efi.c
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@@ -57,7 +57,12 @@
static efi_system_table_t efi_systab __initdata;
static u64 efi_systab_phys __initdata;
static unsigned long prop_phys = EFI_INVALID_TABLE_ADDR;
static unsigned long uga_phys = EFI_INVALID_TABLE_ADDR;
static efi_config_table_type_t arch_tables[] __initdata = {
{EFI_PROPERTIES_TABLE_GUID, "PROP", &prop_phys},
{UGA_IO_PROTOCOL_GUID, "UGA", &uga_phys},
#ifdef CONFIG_X86_UV
{UV_SYSTEM_TABLE_GUID, "UVsystab", &uv_systab_phys},
#endif
@@ -69,7 +74,7 @@ static const unsigned long * const efi_tables[] = {
&efi.acpi20,
&efi.smbios,
&efi.smbios3,
&efi.uga,
&uga_phys,
#ifdef CONFIG_X86_UV
&uv_systab_phys,
#endif
@@ -77,7 +82,7 @@ static const unsigned long * const efi_tables[] = {
&efi.runtime,
&efi.config_table,
&efi.esrt,
&efi.properties_table,
&prop_phys,
&efi.mem_attr_table,
#ifdef CONFIG_EFI_RCI2_TABLE
&rci2_table_phys,
@@ -490,6 +495,22 @@ void __init efi_init(void)
return;
}
/* Parse the EFI Properties table if it exists */
if (prop_phys != EFI_INVALID_TABLE_ADDR) {
efi_properties_table_t *tbl;
tbl = early_memremap_ro(prop_phys, sizeof(*tbl));
if (tbl == NULL) {
pr_err("Could not map Properties table!\n");
} else {
if (tbl->memory_protection_attribute &
EFI_PROPERTIES_RUNTIME_MEMORY_PROTECTION_NON_EXECUTABLE_PE_DATA)
set_bit(EFI_NX_PE_DATA, &efi.flags);
early_memunmap(tbl, sizeof(*tbl));
}
}
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
efi_clean_memmap();
@@ -993,3 +1014,10 @@ bool efi_is_table_address(unsigned long phys_addr)
return false;
}
char *efi_systab_show_arch(char *str)
{
if (uga_phys != EFI_INVALID_TABLE_ADDR)
str += sprintf(str, "UGA=0x%lx\n", uga_phys);
return str;
}