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Revert "arm64: virt: ensure visibility of __boot_cpu_mode" 

This reverts commit 82b2f495fb. The
__boot_cpu_mode variable is flushed in head.S after being written,
therefore the additional cache flushing is no longer required.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Catalin Marinas 2014-03-28 09:49:13 +00:00
parent c218bca74e
commit 0a997ecc08
1 changed files with 0 additions and 13 deletions
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13
arch/arm64/include/asm/virt.h
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@ -22,7 +22,6 @@
#define BOOT_CPU_MODE_EL2 (0xe12)
#ifndef __ASSEMBLY__
#include <asm/cacheflush.h>
/*
* __boot_cpu_mode records what mode CPUs were booted in.
@ -38,20 +37,9 @@ extern u32 __boot_cpu_mode[2];
void __hyp_set_vectors(phys_addr_t phys_vector_base);
phys_addr_t __hyp_get_vectors(void);
static inline void sync_boot_mode(void)
{
/*
* As secondaries write to __boot_cpu_mode with caches disabled, we
* must flush the corresponding cache entries to ensure the visibility
* of their writes.
*/
__flush_dcache_area(__boot_cpu_mode, sizeof(__boot_cpu_mode));
}
/* Reports the availability of HYP mode */
static inline bool is_hyp_mode_available(void)
{
sync_boot_mode();
return (__boot_cpu_mode[0] == BOOT_CPU_MODE_EL2 &&
__boot_cpu_mode[1] == BOOT_CPU_MODE_EL2);
}
@ -59,7 +47,6 @@ static inline bool is_hyp_mode_available(void)
/* Check if the bootloader has booted CPUs in different modes */
static inline bool is_hyp_mode_mismatched(void)
{
sync_boot_mode();
return __boot_cpu_mode[0] != __boot_cpu_mode[1];
}