15abb9351SVasily Gorbik // SPDX-License-Identifier: GPL-2.0 25abb9351SVasily Gorbik #include <asm/uv.h> 342c89439SAlexander Egorenkov #include <asm/boot_data.h> 45abb9351SVasily Gorbik #include <asm/facility.h> 55abb9351SVasily Gorbik #include <asm/sections.h> 65abb9351SVasily Gorbik 742c89439SAlexander Egorenkov #include "boot.h" 8c5cf5054SAlexander Egorenkov #include "uv.h" 9c5cf5054SAlexander Egorenkov 10ecdc5d84SVasily Gorbik /* will be used in arch/s390/kernel/uv.c */ 11ecdc5d84SVasily Gorbik #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 125abb9351SVasily Gorbik int __bootdata_preserved(prot_virt_guest); 13ecdc5d84SVasily Gorbik #endif 141d6671aeSVasily Gorbik #if IS_ENABLED(CONFIG_KVM) 151d6671aeSVasily Gorbik int __bootdata_preserved(prot_virt_host); 161d6671aeSVasily Gorbik #endif 17ecdc5d84SVasily Gorbik struct uv_info __bootdata_preserved(uv_info); 185abb9351SVasily Gorbik uv_query_info(void)195abb9351SVasily Gorbikvoid uv_query_info(void) 205abb9351SVasily Gorbik { 215abb9351SVasily Gorbik struct uv_cb_qui uvcb = { 225abb9351SVasily Gorbik .header.cmd = UVC_CMD_QUI, 235abb9351SVasily Gorbik .header.len = sizeof(uvcb) 245abb9351SVasily Gorbik }; 255abb9351SVasily Gorbik 265abb9351SVasily Gorbik if (!test_facility(158)) 275abb9351SVasily Gorbik return; 285abb9351SVasily Gorbik 2927dc0700SChristian Borntraeger /* rc==0x100 means that there is additional data we do not process */ 3027dc0700SChristian Borntraeger if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) 315abb9351SVasily Gorbik return; 325abb9351SVasily Gorbik 33ecdc5d84SVasily Gorbik if (IS_ENABLED(CONFIG_KVM)) { 34ecdc5d84SVasily Gorbik memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); 35ecdc5d84SVasily Gorbik uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; 36ecdc5d84SVasily Gorbik uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; 37ecdc5d84SVasily Gorbik uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; 38ecdc5d84SVasily Gorbik uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; 39ecdc5d84SVasily Gorbik uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; 40ecdc5d84SVasily Gorbik uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); 41ecdc5d84SVasily Gorbik uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; 42e82080e1SJanosch Frank uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; 4385b18d7bSJanosch Frank uv_info.uv_feature_indications = uvcb.uv_feature_indications; 44ac640db3SJanosch Frank uv_info.supp_se_hdr_ver = uvcb.supp_se_hdr_versions; 45ac640db3SJanosch Frank uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf; 4638c21825SJanosch Frank uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len; 4738c21825SJanosch Frank uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len; 481b6abe95SSteffen Eiden uv_info.supp_att_req_hdr_ver = uvcb.supp_att_req_hdr_ver; 491b6abe95SSteffen Eiden uv_info.supp_att_pflags = uvcb.supp_att_pflags; 50*db54dfc9SSteffen Eiden uv_info.supp_add_secret_req_ver = uvcb.supp_add_secret_req_ver; 51*db54dfc9SSteffen Eiden uv_info.supp_add_secret_pcf = uvcb.supp_add_secret_pcf; 52*db54dfc9SSteffen Eiden uv_info.supp_secret_types = uvcb.supp_secret_types; 53*db54dfc9SSteffen Eiden uv_info.max_secrets = uvcb.max_secrets; 54ecdc5d84SVasily Gorbik } 55ecdc5d84SVasily Gorbik 56ecdc5d84SVasily Gorbik #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 575abb9351SVasily Gorbik if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && 585abb9351SVasily Gorbik test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) 595abb9351SVasily Gorbik prot_virt_guest = 1; 60ecdc5d84SVasily Gorbik #endif 615abb9351SVasily Gorbik } 620c4f2623SVasily Gorbik 630c4f2623SVasily Gorbik #if IS_ENABLED(CONFIG_KVM) adjust_to_uv_max(unsigned long limit)6457ad19bcSAlexander Gordeevunsigned long adjust_to_uv_max(unsigned long limit) 650c4f2623SVasily Gorbik { 667f33565bSAlexander Egorenkov if (is_prot_virt_host() && uv_info.max_sec_stor_addr) 6757ad19bcSAlexander Gordeev limit = min_t(unsigned long, limit, uv_info.max_sec_stor_addr); 6857ad19bcSAlexander Gordeev return limit; 690c4f2623SVasily Gorbik } 7042c89439SAlexander Egorenkov is_prot_virt_host_capable(void)717f33565bSAlexander Egorenkovstatic int is_prot_virt_host_capable(void) 727f33565bSAlexander Egorenkov { 737f33565bSAlexander Egorenkov /* disable if no prot_virt=1 given on command-line */ 747f33565bSAlexander Egorenkov if (!is_prot_virt_host()) 757f33565bSAlexander Egorenkov return 0; 767f33565bSAlexander Egorenkov /* disable if protected guest virtualization is enabled */ 777f33565bSAlexander Egorenkov if (is_prot_virt_guest()) 787f33565bSAlexander Egorenkov return 0; 797f33565bSAlexander Egorenkov /* disable if no hardware support */ 807f33565bSAlexander Egorenkov if (!test_facility(158)) 817f33565bSAlexander Egorenkov return 0; 827f33565bSAlexander Egorenkov /* disable if kdump */ 83e9e7870fSAlexander Egorenkov if (oldmem_data.start) 847f33565bSAlexander Egorenkov return 0; 857f33565bSAlexander Egorenkov /* disable if stand-alone dump */ 867f33565bSAlexander Egorenkov if (ipl_block_valid && is_ipl_block_dump()) 877f33565bSAlexander Egorenkov return 0; 887f33565bSAlexander Egorenkov return 1; 897f33565bSAlexander Egorenkov } 907f33565bSAlexander Egorenkov sanitize_prot_virt_host(void)9142c89439SAlexander Egorenkovvoid sanitize_prot_virt_host(void) 9242c89439SAlexander Egorenkov { 937f33565bSAlexander Egorenkov prot_virt_host = is_prot_virt_host_capable(); 9442c89439SAlexander Egorenkov } 950c4f2623SVasily Gorbik #endif 96