tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
1/*
2 * Copyright 2010-2011 Freescale Semiconductor, Inc.
3 *
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.
7 */
8
9#ifndef ASM_KVM_BOOKE_HV_ASM_H
10#define ASM_KVM_BOOKE_HV_ASM_H
11
12#ifdef __ASSEMBLY__
13
14/*
15 * All exceptions from guest state must go through KVM
16 * (except for those which are delivered directly to the guest) --
17 * there are no exceptions for which we fall through directly to
18 * the normal host handler.
19 *
20 * 32-bit host
21 * Expected inputs (normal exceptions):
22 * SCRATCH0 = saved r10
23 * r10 = thread struct
24 * r11 = appropriate SRR1 variant (currently used as scratch)
25 * r13 = saved CR
26 * *(r10 + THREAD_NORMSAVE(0)) = saved r11
27 * *(r10 + THREAD_NORMSAVE(2)) = saved r13
28 *
29 * Expected inputs (crit/mcheck/debug exceptions):
30 * appropriate SCRATCH = saved r8
31 * r8 = exception level stack frame
32 * r9 = *(r8 + _CCR) = saved CR
33 * r11 = appropriate SRR1 variant (currently used as scratch)
34 * *(r8 + GPR9) = saved r9
35 * *(r8 + GPR10) = saved r10 (r10 not yet clobbered)
36 * *(r8 + GPR11) = saved r11
37 *
38 * 64-bit host
39 * Expected inputs (GEN/GDBELL/DBG/MC exception types):
40 * r10 = saved CR
41 * r13 = PACA_POINTER
42 * *(r13 + PACA_EX##type + EX_R10) = saved r10
43 * *(r13 + PACA_EX##type + EX_R11) = saved r11
44 * SPRN_SPRG_##type##_SCRATCH = saved r13
45 *
46 * Expected inputs (CRIT exception type):
47 * r10 = saved CR
48 * r13 = PACA_POINTER
49 * *(r13 + PACA_EX##type + EX_R10) = saved r10
50 * *(r13 + PACA_EX##type + EX_R11) = saved r11
51 * *(r13 + PACA_EX##type + EX_R13) = saved r13
52 *
53 * Expected inputs (TLB exception type):
54 * r10 = saved CR
55 * r13 = PACA_POINTER
56 * *(r13 + PACA_EX##type + EX_TLB_R10) = saved r10
57 * *(r13 + PACA_EX##type + EX_TLB_R11) = saved r11
58 * SPRN_SPRG_GEN_SCRATCH = saved r13
59 *
60 * Only the bolted version of TLB miss exception handlers is supported now.
61 */
62.macro DO_KVM intno srr1
63#ifdef CONFIG_KVM_BOOKE_HV
64BEGIN_FTR_SECTION
65 mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
66 bf 3, 1975f
67 b kvmppc_handler_\intno\()_\srr1
681975:
69END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
70#endif
71.endm
72
73#endif /*__ASSEMBLY__ */
74#endif /* ASM_KVM_BOOKE_HV_ASM_H */