Commit | Line | Data |
---|---|---|
5abb9351 VG |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | #include <asm/uv.h> | |
42c89439 | 3 | #include <asm/boot_data.h> |
5abb9351 VG |
4 | #include <asm/facility.h> |
5 | #include <asm/sections.h> | |
6 | ||
42c89439 | 7 | #include "boot.h" |
c5cf5054 AE |
8 | #include "uv.h" |
9 | ||
ecdc5d84 VG |
10 | /* will be used in arch/s390/kernel/uv.c */ |
11 | #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST | |
5abb9351 | 12 | int __bootdata_preserved(prot_virt_guest); |
ecdc5d84 | 13 | #endif |
1d6671ae VG |
14 | #if IS_ENABLED(CONFIG_KVM) |
15 | int __bootdata_preserved(prot_virt_host); | |
16 | #endif | |
ecdc5d84 | 17 | struct uv_info __bootdata_preserved(uv_info); |
5abb9351 VG |
18 | |
19 | void uv_query_info(void) | |
20 | { | |
21 | struct uv_cb_qui uvcb = { | |
22 | .header.cmd = UVC_CMD_QUI, | |
23 | .header.len = sizeof(uvcb) | |
24 | }; | |
25 | ||
26 | if (!test_facility(158)) | |
27 | return; | |
28 | ||
27dc0700 CB |
29 | /* rc==0x100 means that there is additional data we do not process */ |
30 | if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) | |
5abb9351 VG |
31 | return; |
32 | ||
ecdc5d84 VG |
33 | if (IS_ENABLED(CONFIG_KVM)) { |
34 | memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); | |
35 | uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; | |
36 | uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; | |
37 | uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; | |
38 | uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; | |
39 | uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; | |
40 | uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); | |
41 | uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; | |
e82080e1 | 42 | uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; |
85b18d7b | 43 | uv_info.uv_feature_indications = uvcb.uv_feature_indications; |
ac640db3 JF |
44 | uv_info.supp_se_hdr_ver = uvcb.supp_se_hdr_versions; |
45 | uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf; | |
38c21825 JF |
46 | uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len; |
47 | uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len; | |
1b6abe95 SE |
48 | uv_info.supp_att_req_hdr_ver = uvcb.supp_att_req_hdr_ver; |
49 | uv_info.supp_att_pflags = uvcb.supp_att_pflags; | |
ecdc5d84 VG |
50 | } |
51 | ||
52 | #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST | |
5abb9351 VG |
53 | if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && |
54 | test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) | |
55 | prot_virt_guest = 1; | |
ecdc5d84 | 56 | #endif |
5abb9351 | 57 | } |
0c4f2623 VG |
58 | |
59 | #if IS_ENABLED(CONFIG_KVM) | |
57ad19bc | 60 | unsigned long adjust_to_uv_max(unsigned long limit) |
0c4f2623 | 61 | { |
7f33565b | 62 | if (is_prot_virt_host() && uv_info.max_sec_stor_addr) |
57ad19bc AG |
63 | limit = min_t(unsigned long, limit, uv_info.max_sec_stor_addr); |
64 | return limit; | |
0c4f2623 VG |
65 | } |
66 | ||
7f33565b | 67 | static int is_prot_virt_host_capable(void) |
0c4f2623 | 68 | { |
7f33565b AE |
69 | /* disable if no prot_virt=1 given on command-line */ |
70 | if (!is_prot_virt_host()) | |
71 | return 0; | |
72 | /* disable if protected guest virtualization is enabled */ | |
73 | if (is_prot_virt_guest()) | |
74 | return 0; | |
75 | /* disable if no hardware support */ | |
76 | if (!test_facility(158)) | |
77 | return 0; | |
78 | /* disable if kdump */ | |
e9e7870f | 79 | if (oldmem_data.start) |
7f33565b AE |
80 | return 0; |
81 | /* disable if stand-alone dump */ | |
82 | if (ipl_block_valid && is_ipl_block_dump()) | |
83 | return 0; | |
84 | return 1; | |
0c4f2623 | 85 | } |
42c89439 AE |
86 | |
87 | void sanitize_prot_virt_host(void) | |
88 | { | |
7f33565b | 89 | prot_virt_host = is_prot_virt_host_capable(); |
42c89439 | 90 | } |
0c4f2623 | 91 | #endif |