linux_dsm_epyc7002/arch/arm64/include/asm/daifflags.h
Julien Thierry a82785a953 arm64: Remove unused daif related functions/macros
There are some helpers to modify PSR.[DAIF] bits that are not referenced
anywhere. The less these bits are available outside of local_irq_*
functions the better.

Get rid of those unused helpers.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: James Morse <james.morse@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2019-02-06 10:05:17 +00:00

58 lines
1.3 KiB
C

/*
* Copyright (C) 2017 ARM Ltd.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef __ASM_DAIFFLAGS_H
#define __ASM_DAIFFLAGS_H
#include <linux/irqflags.h>
#define DAIF_PROCCTX 0
#define DAIF_PROCCTX_NOIRQ PSR_I_BIT
/* mask/save/unmask/restore all exceptions, including interrupts. */
static inline void local_daif_mask(void)
{
asm volatile(
"msr daifset, #0xf // local_daif_mask\n"
:
:
: "memory");
trace_hardirqs_off();
}
static inline unsigned long local_daif_save(void)
{
unsigned long flags;
flags = arch_local_save_flags();
local_daif_mask();
return flags;
}
static inline void local_daif_restore(unsigned long flags)
{
if (!arch_irqs_disabled_flags(flags))
trace_hardirqs_on();
arch_local_irq_restore(flags);
if (arch_irqs_disabled_flags(flags))
trace_hardirqs_off();
}
#endif