// SPDX-License-Identifier: GPL-2.0 #include <asm/uv.h> #include <asm/facility.h> #include <asm/sections.h> /* will be used in arch/s390/kernel/uv.c */ #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST int __bootdata_preserved(prot_virt_guest); #endif #if IS_ENABLED(CONFIG_KVM) int __bootdata_preserved(prot_virt_host); #endif struct uv_info __bootdata_preserved(uv_info); void uv_query_info(void) { struct uv_cb_qui uvcb = { .header.cmd = UVC_CMD_QUI, .header.len = sizeof(uvcb) }; if (!test_facility(158)) return; /* rc==0x100 means that there is additional data we do not process */ if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) return; if (IS_ENABLED(CONFIG_KVM)) { memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; uv_info.uv_feature_indications = uvcb.uv_feature_indications; } #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) prot_virt_guest = 1; #endif } #if IS_ENABLED(CONFIG_KVM) static bool has_uv_sec_stor_limit(void) { /* * keep these conditions in line with setup_uv() */ if (!is_prot_virt_host()) return false; if (is_prot_virt_guest()) return false; if (!test_facility(158)) return false; return !!uv_info.max_sec_stor_addr; } void adjust_to_uv_max(unsigned long *vmax) { if (has_uv_sec_stor_limit()) *vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr); } #endif