Revert "x86-64/efi: Use EFI to deal with platform wall clock"
This reverts commit bacef661ac
.
This commit has been found to cause serious regressions on a number of
ASUS machines at the least. We probably need to provide a 1:1 map in
addition to the EFI virtual memory map in order for this to work.
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Reported-and-bisected-by: Jérôme Carretero <cJ-ko@zougloub.eu>
Cc: Jan Beulich <jbeulich@suse.com>
Cc: Matt Fleming <matt.fleming@intel.com>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20120805172903.5f8bb24c@zougloub.eu
This commit is contained in:
Родитель
f1c6300183
Коммит
f026cfa82f
|
@ -919,13 +919,11 @@ static int change_page_attr_set_clr(unsigned long *addr, int numpages,
|
|||
|
||||
/*
|
||||
* On success we use clflush, when the CPU supports it to
|
||||
* avoid the wbindv. If the CPU does not support it, in the
|
||||
* error case, and during early boot (for EFI) we fall back
|
||||
* to cpa_flush_all (which uses wbinvd):
|
||||
* avoid the wbindv. If the CPU does not support it and in the
|
||||
* error case we fall back to cpa_flush_all (which uses
|
||||
* wbindv):
|
||||
*/
|
||||
if (early_boot_irqs_disabled)
|
||||
__cpa_flush_all((void *)(long)cache);
|
||||
else if (!ret && cpu_has_clflush) {
|
||||
if (!ret && cpu_has_clflush) {
|
||||
if (cpa.flags & (CPA_PAGES_ARRAY | CPA_ARRAY)) {
|
||||
cpa_flush_array(addr, numpages, cache,
|
||||
cpa.flags, pages);
|
||||
|
|
|
@ -234,7 +234,22 @@ static efi_status_t __init phys_efi_set_virtual_address_map(
|
|||
return status;
|
||||
}
|
||||
|
||||
static int efi_set_rtc_mmss(unsigned long nowtime)
|
||||
static efi_status_t __init phys_efi_get_time(efi_time_t *tm,
|
||||
efi_time_cap_t *tc)
|
||||
{
|
||||
unsigned long flags;
|
||||
efi_status_t status;
|
||||
|
||||
spin_lock_irqsave(&rtc_lock, flags);
|
||||
efi_call_phys_prelog();
|
||||
status = efi_call_phys2(efi_phys.get_time, virt_to_phys(tm),
|
||||
virt_to_phys(tc));
|
||||
efi_call_phys_epilog();
|
||||
spin_unlock_irqrestore(&rtc_lock, flags);
|
||||
return status;
|
||||
}
|
||||
|
||||
int efi_set_rtc_mmss(unsigned long nowtime)
|
||||
{
|
||||
int real_seconds, real_minutes;
|
||||
efi_status_t status;
|
||||
|
@ -263,7 +278,7 @@ static int efi_set_rtc_mmss(unsigned long nowtime)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static unsigned long efi_get_time(void)
|
||||
unsigned long efi_get_time(void)
|
||||
{
|
||||
efi_status_t status;
|
||||
efi_time_t eft;
|
||||
|
@ -606,13 +621,18 @@ static int __init efi_runtime_init(void)
|
|||
}
|
||||
/*
|
||||
* We will only need *early* access to the following
|
||||
* EFI runtime service before set_virtual_address_map
|
||||
* two EFI runtime services before set_virtual_address_map
|
||||
* is invoked.
|
||||
*/
|
||||
efi_phys.get_time = (efi_get_time_t *)runtime->get_time;
|
||||
efi_phys.set_virtual_address_map =
|
||||
(efi_set_virtual_address_map_t *)
|
||||
runtime->set_virtual_address_map;
|
||||
|
||||
/*
|
||||
* Make efi_get_time can be called before entering
|
||||
* virtual mode.
|
||||
*/
|
||||
efi.get_time = phys_efi_get_time;
|
||||
early_iounmap(runtime, sizeof(efi_runtime_services_t));
|
||||
|
||||
return 0;
|
||||
|
@ -700,10 +720,12 @@ void __init efi_init(void)
|
|||
efi_enabled = 0;
|
||||
return;
|
||||
}
|
||||
#ifdef CONFIG_X86_32
|
||||
if (efi_native) {
|
||||
x86_platform.get_wallclock = efi_get_time;
|
||||
x86_platform.set_wallclock = efi_set_rtc_mmss;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if EFI_DEBUG
|
||||
print_efi_memmap();
|
||||
|
|
|
@ -503,6 +503,8 @@ extern u64 efi_mem_attribute (unsigned long phys_addr, unsigned long size);
|
|||
extern int __init efi_uart_console_only (void);
|
||||
extern void efi_initialize_iomem_resources(struct resource *code_resource,
|
||||
struct resource *data_resource, struct resource *bss_resource);
|
||||
extern unsigned long efi_get_time(void);
|
||||
extern int efi_set_rtc_mmss(unsigned long nowtime);
|
||||
extern void efi_reserve_boot_services(void);
|
||||
extern struct efi_memory_map memmap;
|
||||
|
||||
|
|
|
@ -461,10 +461,6 @@ static void __init mm_init(void)
|
|||
percpu_init_late();
|
||||
pgtable_cache_init();
|
||||
vmalloc_init();
|
||||
#ifdef CONFIG_X86
|
||||
if (efi_enabled)
|
||||
efi_enter_virtual_mode();
|
||||
#endif
|
||||
}
|
||||
|
||||
asmlinkage void __init start_kernel(void)
|
||||
|
@ -606,6 +602,10 @@ asmlinkage void __init start_kernel(void)
|
|||
calibrate_delay();
|
||||
pidmap_init();
|
||||
anon_vma_init();
|
||||
#ifdef CONFIG_X86
|
||||
if (efi_enabled)
|
||||
efi_enter_virtual_mode();
|
||||
#endif
|
||||
thread_info_cache_init();
|
||||
cred_init();
|
||||
fork_init(totalram_pages);
|
||||
|
|
Загрузка…
Ссылка в новой задаче