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d2912cb1 | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
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2 | /* |
3 | * Copyright 2010-2011 Freescale Semiconductor, Inc. | |
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4 | */ |
5 | ||
6 | #ifndef ASM_KVM_BOOKE_HV_ASM_H | |
7 | #define ASM_KVM_BOOKE_HV_ASM_H | |
8 | ||
2c86cd18 CL |
9 | #include <asm/feature-fixups.h> |
10 | ||
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11 | #ifdef __ASSEMBLY__ |
12 | ||
13 | /* | |
14 | * All exceptions from guest state must go through KVM | |
15 | * (except for those which are delivered directly to the guest) -- | |
16 | * there are no exceptions for which we fall through directly to | |
17 | * the normal host handler. | |
18 | * | |
e51f8f32 | 19 | * 32-bit host |
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20 | * Expected inputs (normal exceptions): |
21 | * SCRATCH0 = saved r10 | |
22 | * r10 = thread struct | |
23 | * r11 = appropriate SRR1 variant (currently used as scratch) | |
24 | * r13 = saved CR | |
25 | * *(r10 + THREAD_NORMSAVE(0)) = saved r11 | |
26 | * *(r10 + THREAD_NORMSAVE(2)) = saved r13 | |
27 | * | |
28 | * Expected inputs (crit/mcheck/debug exceptions): | |
29 | * appropriate SCRATCH = saved r8 | |
30 | * r8 = exception level stack frame | |
31 | * r9 = *(r8 + _CCR) = saved CR | |
32 | * r11 = appropriate SRR1 variant (currently used as scratch) | |
33 | * *(r8 + GPR9) = saved r9 | |
34 | * *(r8 + GPR10) = saved r10 (r10 not yet clobbered) | |
35 | * *(r8 + GPR11) = saved r11 | |
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36 | * |
37 | * 64-bit host | |
9d378dfa | 38 | * Expected inputs (GEN/GDBELL/DBG/CRIT/MC exception types): |
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39 | * r10 = saved CR |
40 | * r13 = PACA_POINTER | |
41 | * *(r13 + PACA_EX##type + EX_R10) = saved r10 | |
42 | * *(r13 + PACA_EX##type + EX_R11) = saved r11 | |
43 | * SPRN_SPRG_##type##_SCRATCH = saved r13 | |
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44 | * |
45 | * Expected inputs (TLB exception type): | |
46 | * r10 = saved CR | |
a3dc6207 | 47 | * r12 = extlb pointer |
e51f8f32 | 48 | * r13 = PACA_POINTER |
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49 | * *(r12 + EX_TLB_R10) = saved r10 |
50 | * *(r12 + EX_TLB_R11) = saved r11 | |
51 | * *(r12 + EX_TLB_R13) = saved r13 | |
52 | * SPRN_SPRG_GEN_SCRATCH = saved r12 | |
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53 | * |
54 | * Only the bolted version of TLB miss exception handlers is supported now. | |
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55 | */ |
56 | .macro DO_KVM intno srr1 | |
57 | #ifdef CONFIG_KVM_BOOKE_HV | |
58 | BEGIN_FTR_SECTION | |
59 | mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */ | |
d61966fc | 60 | bf 3, 1975f |
d30f6e48 | 61 | b kvmppc_handler_\intno\()_\srr1 |
d61966fc | 62 | 1975: |
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63 | END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV) |
64 | #endif | |
65 | .endm | |
66 | ||
67 | #endif /*__ASSEMBLY__ */ | |
68 | #endif /* ASM_KVM_BOOKE_HV_ASM_H */ |