15abb9351SVasily Gorbik // SPDX-License-Identifier: GPL-2.0 25abb9351SVasily Gorbik #include <asm/uv.h> 3*42c89439SAlexander Egorenkov #include <asm/boot_data.h> 45abb9351SVasily Gorbik #include <asm/facility.h> 55abb9351SVasily Gorbik #include <asm/sections.h> 65abb9351SVasily Gorbik 7*42c89439SAlexander 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 195abb9351SVasily Gorbik void 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; 44ecdc5d84SVasily Gorbik } 45ecdc5d84SVasily Gorbik 46ecdc5d84SVasily Gorbik #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST 475abb9351SVasily Gorbik if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && 485abb9351SVasily Gorbik test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) 495abb9351SVasily Gorbik prot_virt_guest = 1; 50ecdc5d84SVasily Gorbik #endif 515abb9351SVasily Gorbik } 520c4f2623SVasily Gorbik 530c4f2623SVasily Gorbik #if IS_ENABLED(CONFIG_KVM) 540c4f2623SVasily Gorbik static bool has_uv_sec_stor_limit(void) 550c4f2623SVasily Gorbik { 560c4f2623SVasily Gorbik /* 570c4f2623SVasily Gorbik * keep these conditions in line with setup_uv() 580c4f2623SVasily Gorbik */ 590c4f2623SVasily Gorbik if (!is_prot_virt_host()) 600c4f2623SVasily Gorbik return false; 610c4f2623SVasily Gorbik 620c4f2623SVasily Gorbik if (is_prot_virt_guest()) 630c4f2623SVasily Gorbik return false; 640c4f2623SVasily Gorbik 650c4f2623SVasily Gorbik if (!test_facility(158)) 660c4f2623SVasily Gorbik return false; 670c4f2623SVasily Gorbik 680c4f2623SVasily Gorbik return !!uv_info.max_sec_stor_addr; 690c4f2623SVasily Gorbik } 700c4f2623SVasily Gorbik 710c4f2623SVasily Gorbik void adjust_to_uv_max(unsigned long *vmax) 720c4f2623SVasily Gorbik { 730c4f2623SVasily Gorbik if (has_uv_sec_stor_limit()) 740c4f2623SVasily Gorbik *vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr); 750c4f2623SVasily Gorbik } 76*42c89439SAlexander Egorenkov 77*42c89439SAlexander Egorenkov void sanitize_prot_virt_host(void) 78*42c89439SAlexander Egorenkov { 79*42c89439SAlexander Egorenkov if (OLDMEM_BASE || (ipl_block_valid && is_ipl_block_dump())) 80*42c89439SAlexander Egorenkov prot_virt_host = 0; 81*42c89439SAlexander Egorenkov } 820c4f2623SVasily Gorbik #endif 83