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/* 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 */
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