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