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arm64/xen: introduce asm/xen header files on arm64

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asm/xen/hypercall.h, asm/xen/hypervisor.h, asm/xen/interface.h and
asm/xen/page.h are identical so to avoid code duplication we are just
including the original arm header files here.

asm/xen/events.h is slightly different, so introduce a different file
here (use xchg to implement xchg_xen_ulong and pass regs->pstate to
raw_irqs_disabled_flags).

Also introduce asm/hypervisor.h and asm/sync_bitops.h.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
This commit is contained in:
Stefano Stabellini 2013-06-04 11:07:03 +00:00
parent f0a8d59791
commit 9f54ad6652
7 changed files with 57 additions and 0 deletions
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6
arch/arm64/include/asm/hypervisor.h Normal file
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#ifndef _ASM_ARM64_HYPERVISOR_H
#define _ASM_ARM64_HYPERVISOR_H
#include <asm/xen/hypervisor.h>
#endif

26
arch/arm64/include/asm/sync_bitops.h Normal file
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#ifndef __ASM_SYNC_BITOPS_H__
#define __ASM_SYNC_BITOPS_H__
#include <asm/bitops.h>
#include <asm/cmpxchg.h>
/* sync_bitops functions are equivalent to the SMP implementation of the
* original functions, independently from CONFIG_SMP being defined.
*
* We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But
* under Xen you might be communicating with a completely external entity
* who might be on another CPU (e.g. two uniprocessor guests communicating
* via event channels and grant tables). So we need a variant of the bit
* ops which are SMP safe even on a UP kernel.
*/
#define sync_set_bit(nr, p) set_bit(nr, p)
#define sync_clear_bit(nr, p) clear_bit(nr, p)
#define sync_change_bit(nr, p) change_bit(nr, p)
#define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p)
#define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p)
#define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p)
#define sync_test_bit(nr, addr) test_bit(nr, addr)
#define sync_cmpxchg cmpxchg
#endif

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arch/arm64/include/asm/xen/events.h Normal file
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#ifndef _ASM_ARM64_XEN_EVENTS_H
#define _ASM_ARM64_XEN_EVENTS_H
#include <asm/ptrace.h>
#include <asm/atomic.h>
enum ipi_vector {
XEN_PLACEHOLDER_VECTOR,
/* Xen IPIs go here */
XEN_NR_IPIS,
};
static inline int xen_irqs_disabled(struct pt_regs *regs)
{
return raw_irqs_disabled_flags((unsigned long) regs->pstate);
}
#define xchg_xen_ulong(ptr, val) xchg((ptr), (val))
#endif /* _ASM_ARM64_XEN_EVENTS_H */

1
arch/arm64/include/asm/xen/hypercall.h Normal file
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#include <../../arm/include/asm/xen/hypercall.h>

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arch/arm64/include/asm/xen/hypervisor.h Normal file
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#include <../../arm/include/asm/xen/hypervisor.h>

1
arch/arm64/include/asm/xen/interface.h Normal file
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#include <../../arm/include/asm/xen/interface.h>

1
arch/arm64/include/asm/xen/page.h Normal file
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#include <../../arm/include/asm/xen/page.h>