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/******************************************************************************
* asm-x86/hypercall.h
*/
#ifndef __XEN_HYPERCALL_H__
#error "asm/hypercall.h should not be included directly - include xen/hypercall.h instead"
#endif
#ifndef __ASM_X86_HYPERCALL_H__
#define __ASM_X86_HYPERCALL_H__
#include <xen/types.h>
#include <public/physdev.h>
#include <public/event_channel.h>
#include <public/arch-x86/xen-mca.h> /* for do_mca */
#include <asm/paging.h>
#define __HYPERVISOR_paging_domctl_cont __HYPERVISOR_arch_1
#ifdef CONFIG_PV
void pv_hypercall(struct cpu_user_regs *regs);
#endif
void pv_ring1_init_hypercall_page(void *ptr);
void pv_ring3_init_hypercall_page(void *ptr);
/*
* Both do_mmuext_op() and do_mmu_update():
* We steal the m.s.b. of the @count parameter to indicate whether this
* invocation of do_mmu_update() is resuming a previously preempted call.
*/
#define MMU_UPDATE_PREEMPTED (~(~0U>>1))
#ifdef CONFIG_COMPAT
#include <compat/arch-x86/xen.h>
#include <compat/physdev.h>
#include <compat/platform.h>
extern int
compat_common_vcpu_op(
int cmd, struct vcpu *v, XEN_GUEST_HANDLE_PARAM(void) arg);
#endif /* CONFIG_COMPAT */
static inline void clobber_regs64(struct cpu_user_regs *regs,
unsigned int nargs)
{
#ifndef NDEBUG
/* Deliberately corrupt used parameter regs. */
switch ( nargs )
{
case 5: regs->r8 = 0xdeadbeefdeadf00dUL; fallthrough;
case 4: regs->r10 = 0xdeadbeefdeadf00dUL; fallthrough;
case 3: regs->rdx = 0xdeadbeefdeadf00dUL; fallthrough;
case 2: regs->rsi = 0xdeadbeefdeadf00dUL; fallthrough;
case 1: regs->rdi = 0xdeadbeefdeadf00dUL;
}
#endif
}
static inline void clobber_regs32(struct cpu_user_regs *regs,
unsigned int nargs)
{
#ifndef NDEBUG
/* Deliberately corrupt used parameter regs. */
switch ( nargs )
{
case 5: regs->edi = 0xdeadf00dU; fallthrough;
case 4: regs->esi = 0xdeadf00dU; fallthrough;
case 3: regs->edx = 0xdeadf00dU; fallthrough;
case 2: regs->ecx = 0xdeadf00dU; fallthrough;
case 1: regs->ebx = 0xdeadf00dU;
}
#endif
}
#define clobber_regs(r, n, t, b) ({ \
static const unsigned char t ## b[] = hypercall_args_ ## t ## b; \
clobber_regs ## b(r, array_access_nospec(t ## b, n)); \
})
#endif /* __ASM_X86_HYPERCALL_H__ */
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