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
 8int __bootdata_preserved(prot_virt_guest);
 9#endif
10struct uv_info __bootdata_preserved(uv_info);
11
12void uv_query_info(void)
13{
14	struct uv_cb_qui uvcb = {
15		.header.cmd = UVC_CMD_QUI,
16		.header.len = sizeof(uvcb)
17	};
18
19	if (!test_facility(158))
20		return;
21
22	/* rc==0x100 means that there is additional data we do not process */
23	if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
24		return;
25
26	if (IS_ENABLED(CONFIG_KVM)) {
27		memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list));
28		uv_info.uv_base_stor_len = uvcb.uv_base_stor_len;
29		uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len;
30		uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len;
31		uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len;
32		uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len;
33		uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE);
34		uv_info.max_num_sec_conf = uvcb.max_num_sec_conf;
35		uv_info.max_guest_cpus = uvcb.max_guest_cpus;
36	}
37
38#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
39	if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
40	    test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))
41		prot_virt_guest = 1;
42#endif
43}