Commit-ID: abc93f8eb6e46a480485f19256bdbda36ec78a84
Gitweb: http://git.kernel.org/tip/abc93f8eb6e46a480485f19256bdbda36ec78a84
Author: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
AuthorDate: Mon, 30 Jun 2014 19:52:56 +0200
Committer: Matt Fleming <matt.fleming@xxxxxxxxx>
CommitDate: Fri, 18 Jul 2014 21:23:54 +0100
efi: Use early_mem*() instead of early_io*()
Use early_mem*() instead of early_io*() because all mapped EFI regions
are memory (usually RAM but they could also be ROM, EPROM, EEPROM, flash,
etc.) not I/O regions. Additionally, I/O family calls do not work correctly
under Xen in our case. early_ioremap() skips the PFN to MFN conversion
when building the PTE. Using it for memory will attempt to map the wrong
machine frame. However, all artificial EFI structures created under Xen
live in dom0 memory and should be mapped/unmapped using early_mem*() family
calls which map domain memory.
Signed-off-by: Daniel Kiper <daniel.kiper@xxxxxxxxxx>
Cc: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
Cc: Mark Salter <msalter@xxxxxxxxxx>
Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx>
---
arch/x86/platform/efi/efi.c | 28 ++++++++++++++--------------
drivers/firmware/efi/efi.c | 4 ++--
2 files changed, 16 insertions(+), 16 deletions(-)
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index 135812b..b405972 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -256,7 +256,7 @@ void __init efi_unmap_memmap(void)
{
clear_bit(EFI_MEMMAP, &efi.flags);
if (memmap.map) {
- early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
+ early_memunmap(memmap.map, memmap.nr_map * memmap.desc_size);
memmap.map = NULL;
}
}
@@ -273,12 +273,12 @@ static int __init efi_systab_init(void *phys)
if (!data)
return -ENOMEM;
}
- systab64 = early_ioremap((unsigned long)phys,
+ systab64 = early_memremap((unsigned long)phys,
sizeof(*systab64));
if (systab64 == NULL) {
pr_err("Couldn't map the system table!\n");
if (data)
- early_iounmap(data, sizeof(*data));
+ early_memunmap(data, sizeof(*data));
return -ENOMEM;
}
@@ -310,9 +310,9 @@ static int __init efi_systab_init(void *phys)
systab64->tables;
tmp |= data ? data->tables : systab64->tables;
- early_iounmap(systab64, sizeof(*systab64));
+ early_memunmap(systab64, sizeof(*systab64));
if (data)
- early_iounmap(data, sizeof(*data));
+ early_memunmap(data, sizeof(*data));
#ifdef CONFIG_X86_32
if (tmp >> 32) {
pr_err("EFI data located above 4GB, disabling EFI.\n");
@@ -322,7 +322,7 @@ static int __init efi_systab_init(void *phys)
} else {
efi_system_table_32_t *systab32;
- systab32 = early_ioremap((unsigned long)phys,
+ systab32 = early_memremap((unsigned long)phys,
sizeof(*systab32));
if (systab32 == NULL) {
pr_err("Couldn't map the system table!\n");
@@ -343,7 +343,7 @@ static int __init efi_systab_init(void *phys)
efi_systab.nr_tables = systab32->nr_tables;
efi_systab.tables = systab32->tables;
- early_iounmap(systab32, sizeof(*systab32));
+ early_memunmap(systab32, sizeof(*systab32));
}
efi.systab = &efi_systab;
@@ -369,7 +369,7 @@ static int __init efi_runtime_init32(void)
{
efi_runtime_services_32_t *runtime;
- runtime = early_ioremap((unsigned long)efi.systab->runtime,
+ runtime = early_memremap((unsigned long)efi.systab->runtime,
sizeof(efi_runtime_services_32_t));
if (!runtime) {
pr_err("Could not map the runtime service table!\n");
@@ -384,7 +384,7 @@ static int __init efi_runtime_init32(void)
efi_phys.set_virtual_address_map =
(efi_set_virtual_address_map_t *)
(unsigned long)runtime->set_virtual_address_map;
- early_iounmap(runtime, sizeof(efi_runtime_services_32_t));
+ early_memunmap(runtime, sizeof(efi_runtime_services_32_t));
return 0;
}
@@ -393,7 +393,7 @@ static int __init efi_runtime_init64(void)
{
efi_runtime_services_64_t *runtime;
- runtime = early_ioremap((unsigned long)efi.systab->runtime,
+ runtime = early_memremap((unsigned long)efi.systab->runtime,
sizeof(efi_runtime_services_64_t));
if (!runtime) {
pr_err("Could not map the runtime service table!\n");
@@ -408,7 +408,7 @@ static int __init efi_runtime_init64(void)
efi_phys.set_virtual_address_map =
(efi_set_virtual_address_map_t *)
(unsigned long)runtime->set_virtual_address_map;
- early_iounmap(runtime, sizeof(efi_runtime_services_64_t));
+ early_memunmap(runtime, sizeof(efi_runtime_services_64_t));
return 0;
}
@@ -439,7 +439,7 @@ static int __init efi_runtime_init(void)
static int __init efi_memmap_init(void)
{
/* Map the EFI memory map */
- memmap.map = early_ioremap((unsigned long)memmap.phys_map,
+ memmap.map = early_memremap((unsigned long)memmap.phys_map,
memmap.nr_map * memmap.desc_size);
if (memmap.map == NULL) {
pr_err("Could not map the memory map!\n");
@@ -487,14 +487,14 @@ void __init efi_init(void)
/*
* Show what we know for posterity
*/
- c16 = tmp = early_ioremap(efi.systab->fw_vendor, 2);
+ c16 = tmp = early_memremap(efi.systab->fw_vendor, 2);
if (c16) {
for (i = 0; i < sizeof(vendor) - 1 && *c16; ++i)
vendor[i] = *c16++;
vendor[i] = '\0';
} else
pr_err("Could not map the firmware vendor!\n");
- early_iounmap(tmp, 2);
+ early_memunmap(tmp, 2);
pr_info("EFI v%u.%.02u by %s\n",
efi.systab->hdr.revision >> 16,
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c
index cd36deb..023937a 100644
--- a/drivers/firmware/efi/efi.c
+++ b/drivers/firmware/efi/efi.c
@@ -298,7 +298,7 @@ int __init efi_config_init(efi_config_table_type_t *arch_tables)
if (table64 >> 32) {
pr_cont("\n");
pr_err("Table located above 4GB, disabling EFI.\n");
- early_iounmap(config_tables,
+ early_memunmap(config_tables,
efi.systab->nr_tables * sz);
return -EINVAL;
}
@@ -314,7 +314,7 @@ int __init efi_config_init(efi_config_table_type_t *arch_tables)
tablep += sz;
}
pr_cont("\n");
- early_iounmap(config_tables, efi.systab->nr_tables * sz);
+ early_memunmap(config_tables, efi.systab->nr_tables * sz);
set_bit(EFI_CONFIG_TABLES, &efi.flags);
--
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