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hv: multi-arch construct barrier library

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extract common barrier interface to include/lib/barrier.h,
and invoke the variant implementation of arch.

Tracked-On: #8803
Signed-off-by: Haoyu Tang <haoyu.tang@intel.com>
Reviewed-by: Yifan Liu  <yifan1.liu@intel.com>
Acked-by: Wang, Yu1 <yu1.wang@intel.com>
This commit is contained in:
Haoyu Tang
2025-09-06 20:46:00 +08:00
committed by acrnsi-robot
parent 47944d975d
commit f67a437e5a
3 changed files with 67 additions and 18 deletions
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19
hypervisor/include/arch/x86/asm/cpu.h
View File

@@ -41,6 +41,7 @@
#include <acrn_common.h>
#include <asm/msr.h>
#include <errno.h>
#include <barrier.h>
/* Define CPU stack alignment */
#define CPU_STACK_ALIGN 16UL
@@ -565,24 +566,6 @@ static inline void cpu_sp_write(uint64_t *stack_ptr)
asm volatile ("movq %0, %%rsp" : : "r"(rsp));
}
/* Synchronizes all write accesses to memory */
static inline void cpu_write_memory_barrier(void)
{
asm volatile ("sfence\n" : : : "memory");
}
/* Synchronizes all read and write accesses to/from memory */
static inline void cpu_memory_barrier(void)
{
asm volatile ("mfence\n" : : : "memory");
}
/* Prevents compilers from reordering read/write access across this barrier */
static inline void cpu_compiler_barrier(void)
{
asm volatile ("" : : : "memory");
}
static inline void invlpg(unsigned long addr)
{
asm volatile("invlpg (%0)" ::"r" (addr) : "memory");

26
hypervisor/include/arch/x86/asm/lib/barrier.h Normal file
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@@ -0,0 +1,26 @@
/*
* Copyright (C) 2025 Intel Corporation.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef X86_LIB_BARRIER_H
#define X86_LIB_BARRIER_H
/* Synchronizes all read accesses to memory */
static inline void arch_cpu_read_memory_barrier(void)
{
asm volatile ("lfence\n" : : : "memory");
}
/* Synchronizes all write accesses to memory */
static inline void arch_cpu_write_memory_barrier(void)
{
asm volatile ("sfence\n" : : : "memory");
}
/* Synchronizes all read and write accesses to/from memory */
static inline void arch_cpu_memory_barrier(void)
{
asm volatile ("mfence\n" : : : "memory");
}
#endif /* X86_LIB_BARRIER_H */

40
hypervisor/include/lib/barrier.h Normal file
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@@ -0,0 +1,40 @@
/*
* Copyright (C) 2025 Intel Corporation.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#ifndef BARRIER_H
#define BARRIER_H
#include <types.h>
#include <asm/lib/barrier.h>
/* The mandatory functions should be implemented by arch barrier library */
static inline void arch_cpu_read_memory_barrier(void);
static inline void arch_cpu_write_memory_barrier(void);
static inline void arch_cpu_memory_barrier(void);
/* The common functions map to arch implementation */
/* Synchronizes all write accesses to memory */
static inline void cpu_write_memory_barrier(void)
{
return arch_cpu_write_memory_barrier();
}
/* Synchronizes all read accesses from memory */
static inline void cpu_read_memory_barrier(void)
{
return arch_cpu_read_memory_barrier();
}
/* Synchronizes all read and write accesses to/from memory */
static inline void cpu_memory_barrier(void)
{
return arch_cpu_memory_barrier();
}
/* Prevents compilers from reordering read/write access across this barrier */
static inline void cpu_compiler_barrier(void)
{
asm volatile ("" : : : "memory");
}
#endif /* BARRIER_H */