2 * Copyright 2010-2011 Freescale Semiconductor, Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2, as
6 * published by the Free Software Foundation.
9 #ifndef ASM_KVM_BOOKE_HV_ASM_H
10 #define ASM_KVM_BOOKE_HV_ASM_H
12 #include <asm/feature-fixups.h>
17 * All exceptions from guest state must go through KVM
18 * (except for those which are delivered directly to the guest) --
19 * there are no exceptions for which we fall through directly to
20 * the normal host handler.
23 * Expected inputs (normal exceptions):
24 * SCRATCH0 = saved r10
26 * r11 = appropriate SRR1 variant (currently used as scratch)
28 * *(r10 + THREAD_NORMSAVE(0)) = saved r11
29 * *(r10 + THREAD_NORMSAVE(2)) = saved r13
31 * Expected inputs (crit/mcheck/debug exceptions):
32 * appropriate SCRATCH = saved r8
33 * r8 = exception level stack frame
34 * r9 = *(r8 + _CCR) = saved CR
35 * r11 = appropriate SRR1 variant (currently used as scratch)
36 * *(r8 + GPR9) = saved r9
37 * *(r8 + GPR10) = saved r10 (r10 not yet clobbered)
38 * *(r8 + GPR11) = saved r11
41 * Expected inputs (GEN/GDBELL/DBG/CRIT/MC exception types):
44 * *(r13 + PACA_EX##type + EX_R10) = saved r10
45 * *(r13 + PACA_EX##type + EX_R11) = saved r11
46 * SPRN_SPRG_##type##_SCRATCH = saved r13
48 * Expected inputs (TLB exception type):
52 * *(r12 + EX_TLB_R10) = saved r10
53 * *(r12 + EX_TLB_R11) = saved r11
54 * *(r12 + EX_TLB_R13) = saved r13
55 * SPRN_SPRG_GEN_SCRATCH = saved r12
57 * Only the bolted version of TLB miss exception handlers is supported now.
59 .macro DO_KVM intno srr1
60 #ifdef CONFIG_KVM_BOOKE_HV
62 mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
64 b kvmppc_handler_\intno\()_\srr1
66 END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
70 #endif /*__ASSEMBLY__ */
71 #endif /* ASM_KVM_BOOKE_HV_ASM_H */