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 * 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
36 */
37.macro DO_KVM intno srr1
38#ifdef CONFIG_KVM_BOOKE_HV
39BEGIN_FTR_SECTION
40 mtocrf 0x80, r11 /* check MSR[GS] without clobbering reg */
41 bf 3, kvmppc_resume_\intno\()_\srr1
42 b kvmppc_handler_\intno\()_\srr1
43kvmppc_resume_\intno\()_\srr1:
44END_FTR_SECTION_IFSET(CPU_FTR_EMB_HV)
45#endif
46.endm
47
48#endif /*__ASSEMBLY__ */
49#endif /* ASM_KVM_BOOKE_HV_ASM_H */