69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright 2010-2011 Freescale Semiconductor, Inc.
|
|
*/
|
|
|
|
#ifndef ASM_KVM_BOOKE_HV_ASM_H
|
|
#define ASM_KVM_BOOKE_HV_ASM_H
|
|
|
|
#include <asm/feature-fixups.h>
|
|
|
|
#ifdef __ASSEMBLY__
|
|
|
|
/*
|
|
* All exceptions from guest state must go through KVM
|
|
* (except for those which are delivered directly to the guest) --
|
|
* there are no exceptions for which we fall through directly to
|
|
* the normal host handler.
|
|
*
|
|
* 32-bit host
|
|
* Expected inputs (normal exceptions):
|
|
* SCRATCH0 = saved r10
|
|
* r10 = thread struct
|
|
* r11 = appropriate SRR1 variant (currently used as scratch)
|
|
* r13 = saved CR
|
|
* *(r10 + THREAD_NORMSAVE(0)) = saved r11
|
|
* *(r10 + THREAD_NORMSAVE(2)) = saved r13
|
|
*
|
|
* Expected inputs (crit/mcheck/debug exceptions):
|
|
* appropriate SCRATCH = saved r8
|
|
* r8 = exception level stack frame
|
|
* r9 = *(r8 + _CCR) = saved CR
|
|
* r11 = appropriate SRR1 variant (currently used as scratch)
|
|
* *(r8 + GPR9) = saved r9
|
|
* *(r8 + GPR10) = saved r10 (r10 not yet clobbered)
|
|
* *(r8 + GPR11) = saved r11
|
|
*
|
|
* 64-bit host
|
|
* Expected inputs (GEN/GDBELL/DBG/CRIT/MC exception types):
|
|
* r10 = saved CR
|
|
* r13 = PACA_POINTER
|
|
* *(r13 + PACA_EX##type + EX_R10) = saved r10
|
|
* *(r13 + PACA_EX##type + EX_R11) = saved r11
|
|
* SPRN_SPRG_##type##_SCRATCH = saved r13
|
|
*
|
|
* Expected inputs (TLB exception type):
|
|
* r10 = saved CR
|
|
* r12 = extlb pointer
|
|
* r13 = PACA_POINTER
|
|
* *(r12 + EX_TLB_R10) = saved r10
|
|
* *(r12 + EX_TLB_R11) = saved r11
|
|
* *(r12 + EX_TLB_R13) = saved r13
|
|
* SPRN_SPRG_GEN_SCRATCH = saved r12
|
|
*
|
|
* Only the bolted version of TLB miss exception handlers is supported now.
|
|
*/
|
|
.macro DO_KVM intno srr1
|
|
#ifdef CONFIG_KVM_BOOKE_HV
|
|
BEGIN_FTR_SECTION
|
|
mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
|
|
bf 3, 1975f
|
|
b kvmppc_handler_\intno\()_\srr1
|
|
1975:
|
|
END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
|
|
#endif
|
|
.endm
|
|
|
|
#endif /*__ASSEMBLY__ */
|
|
#endif /* ASM_KVM_BOOKE_HV_ASM_H */
|