/root/src/xen/xen/arch/x86/pv/misc-hypercalls.c
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1 | | /****************************************************************************** |
2 | | * arch/x86/pv/misc-hypercalls.c |
3 | | * |
4 | | * Misc hypercall handlers |
5 | | * |
6 | | * Modifications to Linux original are copyright (c) 2002-2004, K A Fraser |
7 | | * |
8 | | * This program is free software; you can redistribute it and/or modify |
9 | | * it under the terms of the GNU General Public License as published by |
10 | | * the Free Software Foundation; either version 2 of the License, or |
11 | | * (at your option) any later version. |
12 | | * |
13 | | * This program is distributed in the hope that it will be useful, |
14 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
16 | | * GNU General Public License for more details. |
17 | | * |
18 | | * You should have received a copy of the GNU General Public License |
19 | | * along with this program; If not, see <http://www.gnu.org/licenses/>. |
20 | | */ |
21 | | |
22 | | #include <xen/hypercall.h> |
23 | | |
24 | | #include <asm/debugreg.h> |
25 | | |
26 | | long do_set_debugreg(int reg, unsigned long value) |
27 | 0 | { |
28 | 0 | return set_debugreg(current, reg, value); |
29 | 0 | } |
30 | | |
31 | | unsigned long do_get_debugreg(int reg) |
32 | 0 | { |
33 | 0 | struct vcpu *curr = current; |
34 | 0 |
|
35 | 0 | switch ( reg ) |
36 | 0 | { |
37 | 0 | case 0 ... 3: |
38 | 0 | case 6: |
39 | 0 | return curr->arch.debugreg[reg]; |
40 | 0 | case 7: |
41 | 0 | return (curr->arch.debugreg[7] | |
42 | 0 | curr->arch.debugreg[5]); |
43 | 0 | case 4 ... 5: |
44 | 0 | return ((curr->arch.pv_vcpu.ctrlreg[4] & X86_CR4_DE) ? |
45 | 0 | curr->arch.debugreg[reg + 2] : 0); |
46 | 0 | } |
47 | 0 |
|
48 | 0 | return -EINVAL; |
49 | 0 | } |
50 | | |
51 | | long do_fpu_taskswitch(int set) |
52 | 0 | { |
53 | 0 | struct vcpu *v = current; |
54 | 0 |
|
55 | 0 | if ( set ) |
56 | 0 | { |
57 | 0 | v->arch.pv_vcpu.ctrlreg[0] |= X86_CR0_TS; |
58 | 0 | stts(); |
59 | 0 | } |
60 | 0 | else |
61 | 0 | { |
62 | 0 | v->arch.pv_vcpu.ctrlreg[0] &= ~X86_CR0_TS; |
63 | 0 | if ( v->fpu_dirtied ) |
64 | 0 | clts(); |
65 | 0 | } |
66 | 0 |
|
67 | 0 | return 0; |
68 | 0 | } |
69 | | |
70 | | /* |
71 | | * Local variables: |
72 | | * mode: C |
73 | | * c-file-style: "BSD" |
74 | | * c-basic-offset: 4 |
75 | | * tab-width: 4 |
76 | | * indent-tabs-mode: nil |
77 | | * End: |
78 | | */ |