path: root/arch/ia64/kvm/optvfault.S

/*
 * arch/ia64/kvm/optvfault.S
 * optimize virtualization fault handler
 *
 * Copyright (C) 2006 Intel Co
 *	Xuefei Xu (Anthony Xu) <anthony.xu@intel.com>
 * Copyright (C) 2008 Intel Co
 *      Add the support for Tukwila processors.
 *	Xiantao Zhang <xiantao.zhang@intel.com>
 */

#include <asm/asmmacro.h>
#include <asm/processor.h>

#include "vti.h"
#include "asm-offsets.h"

#define ACCE_MOV_FROM_AR
#define ACCE_MOV_FROM_RR
#define ACCE_MOV_TO_RR
#define ACCE_RSM
#define ACCE_SSM
#define ACCE_MOV_TO_PSR
#define ACCE_THASH

#define VMX_VPS_SYNC_READ			\
	add r16=VMM_VPD_BASE_OFFSET,r21;	\
	mov r17 = b0;				\
	mov r18 = r24;				\
	mov r19 = r25;				\
	mov r20 = r31;				\
	;;					\
{.mii;						\
	ld8 r16 = [r16];			\
	nop 0x0;				\
	mov r24 = ip;				\
	;;					\
};						\
{.mmb;						\
	add r24=0x20, r24;			\
	mov r25 =r16;				\
	br.sptk.many kvm_vps_sync_read;		\
};						\
	mov b0 = r17;				\
	mov r24 = r18;				\
	mov r25 = r19;				\
	mov r31 = r20

ENTRY(kvm_vps_entry)
	adds r29 = VMM_VCPU_VSA_BASE_OFFSET,r21
	;;
	ld8 r29 = [r29]
	;;
	add r29 = r29, r30
	;;
	mov b0 = r29
	br.sptk.many b0
END(kvm_vps_entry)

/*
 *	Inputs:
 *	r24 : return address
 *  	r25 : vpd
 *	r29 : scratch
 *
 */
GLOBAL_ENTRY(kvm_vps_sync_read)
	movl r30 = PAL_VPS_SYNC_READ
	;;
	br.sptk.many kvm_vps_entry
END(kvm_vps_sync_read)

/*
 *	Inputs:
 *	r24 : return address
 *  	r25 : vpd
 *	r29 : scratch
 *
 */
GLOBAL_ENTRY(kvm_vps_sync_write)
	movl r30 = PAL_VPS_SYNC_WRITE
	;;
	br.sptk.many kvm_vps_entry
END(kvm_vps_sync_write)

/*
 *	Inputs:
 *	r23 : pr
 *	r24 : guest b0
 *  	r25 : vpd
 *
 */
GLOBAL_ENTRY(kvm_vps_resume_normal)
	movl r30 = PAL_VPS_RESUME_NORMAL
	;;
	mov pr=r23,-2
	br.sptk.many kvm_vps_entry
END(kvm_vps_resume_normal)

/*
 *	Inputs:
 *	r23 : pr
 *	r24 : guest b0
 *  	r25 : vpd
 *	r17 : isr
 */
GLOBAL_ENTRY(kvm_vps_resume_handler)
	movl r30 = PAL_VPS_RESUME_HANDLER
	;;
	ld8 r26=[r25]
	shr r17=r17,IA64_ISR_IR_BIT
	;;
	dep r26=r17,r26,63,1   // bit 63 of r26 indicate whether enable CFLE
	mov pr=r23,-2
	br.sptk.many kvm_vps_entry
END(kvm_vps_resume_handler)

//mov r1=ar3
GLOBAL_ENTRY(kvm_asm_mov_from_ar)
#ifndef ACCE_MOV_FROM_AR
	br.many kvm_virtualization_fault_back
#endif
	add r18=VMM_VCPU_ITC_OFS_OFFSET, r21
	add r16=VMM_VCPU_LAST_ITC_OFFSET,r21
	extr.u r17=r25,6,7
	;;
	ld8 r18=[r18]
	mov r19=ar.itc
	mov r24=b0
	;;
	add r19=r19,r18
	addl r20=@gprel(asm_mov_to_reg),gp
	;;
	st8 [r16] = r19
	adds r30=kvm_resume_to_guest-asm_mov_to_reg,r20
	shladd r17=r17,4,r20
	;;
	mov b0=r17
	br.sptk.few b0
	;;
END(kvm_asm_mov_from_ar)


// mov r1=rr[r3]
GLOBAL_ENTRY(kvm_asm_mov_from_rr)
#ifndef ACCE_MOV_FROM_RR
	br.many kvm_virtualization_fault_back
#endif
	extr.u r16=r25,