xref: /OK3568_Linux_fs/kernel/arch/s390/boot/uv.c (revision 4882a59341e53eb6f0b4789bf948001014eff981)
1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include <asm/uv.h>
3*4882a593Smuzhiyun #include <asm/facility.h>
4*4882a593Smuzhiyun #include <asm/sections.h>
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun /* will be used in arch/s390/kernel/uv.c */
7*4882a593Smuzhiyun #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
8*4882a593Smuzhiyun int __bootdata_preserved(prot_virt_guest);
9*4882a593Smuzhiyun #endif
10*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_KVM)
11*4882a593Smuzhiyun int __bootdata_preserved(prot_virt_host);
12*4882a593Smuzhiyun #endif
13*4882a593Smuzhiyun struct uv_info __bootdata_preserved(uv_info);
14*4882a593Smuzhiyun 
uv_query_info(void)15*4882a593Smuzhiyun void uv_query_info(void)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun 	struct uv_cb_qui uvcb = {
18*4882a593Smuzhiyun 		.header.cmd = UVC_CMD_QUI,
19*4882a593Smuzhiyun 		.header.len = sizeof(uvcb)
20*4882a593Smuzhiyun 	};
21*4882a593Smuzhiyun 
22*4882a593Smuzhiyun 	if (!test_facility(158))
23*4882a593Smuzhiyun 		return;
24*4882a593Smuzhiyun 
25*4882a593Smuzhiyun 	/* rc==0x100 means that there is additional data we do not process */
26*4882a593Smuzhiyun 	if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100)
27*4882a593Smuzhiyun 		return;
28*4882a593Smuzhiyun 
29*4882a593Smuzhiyun 	if (IS_ENABLED(CONFIG_KVM)) {
30*4882a593Smuzhiyun 		memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list));
31*4882a593Smuzhiyun 		uv_info.uv_base_stor_len = uvcb.uv_base_stor_len;
32*4882a593Smuzhiyun 		uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len;
33*4882a593Smuzhiyun 		uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len;
34*4882a593Smuzhiyun 		uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len;
35*4882a593Smuzhiyun 		uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len;
36*4882a593Smuzhiyun 		uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE);
37*4882a593Smuzhiyun 		uv_info.max_num_sec_conf = uvcb.max_num_sec_conf;
38*4882a593Smuzhiyun 		uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id;
39*4882a593Smuzhiyun 		uv_info.uv_feature_indications = uvcb.uv_feature_indications;
40*4882a593Smuzhiyun 	}
41*4882a593Smuzhiyun 
42*4882a593Smuzhiyun #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
43*4882a593Smuzhiyun 	if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) &&
44*4882a593Smuzhiyun 	    test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list))
45*4882a593Smuzhiyun 		prot_virt_guest = 1;
46*4882a593Smuzhiyun #endif
47*4882a593Smuzhiyun }
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