1 // SPDX-License-Identifier: GPL-2.0 2 #include <asm/uv.h> 3 #include <asm/facility.h> 4 #include <asm/sections.h> 5 6 /* will be used in arch/s390/kernel/uv.c */ 7 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 8 int __bootdata_preserved(prot_virt_guest); 9 #endif 10 #if IS_ENABLED(CONFIG_KVM) 11 struct uv_info __bootdata_preserved(uv_info); 12 #endif 13 14 void uv_query_info(void) 15 { 16 struct uv_cb_qui uvcb = { 17 .header.cmd = UVC_CMD_QUI, 18 .header.len = sizeof(uvcb) 19 }; 20 21 if (!test_facility(158)) 22 return; 23 24 /* rc==0x100 means that there is additional data we do not process */ 25 if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) 26 return; 27 28 if (IS_ENABLED(CONFIG_KVM)) { 29 memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); 30 uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; 31 uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; 32 uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; 33 uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; 34 uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; 35 uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); 36 uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; 37 uv_info.max_guest_cpus = uvcb.max_guest_cpus; 38 } 39 40 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 41 if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && 42 test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) 43 prot_virt_guest = 1; 44 #endif 45 } 46