1 // SPDX-License-Identifier: GPL-2.0
3 #include <asm/facility.h>
4 #include <asm/sections.h>
6 /* will be used in arch/s390/kernel/uv.c */
7 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
8 int __bootdata_preserved(prot_virt_guest);
10 #if IS_ENABLED(CONFIG_KVM)
11 int __bootdata_preserved(prot_virt_host);
13 struct uv_info __bootdata_preserved(uv_info);
15 void uv_query_info(void)
17 struct uv_cb_qui uvcb = {
18 .header.cmd = UVC_CMD_QUI,
19 .header.len = sizeof(uvcb)
22 if (!test_facility(158))
25 /* rc==0x100 means that there is additional data we do not process */
26 if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
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;
42 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
43 if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
44 test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))