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84 lines
2.4 KiB
84 lines
2.4 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <asm/uv.h> |
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#include <asm/boot_data.h> |
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#include <asm/facility.h> |
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#include <asm/sections.h> |
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#include "boot.h" |
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#include "uv.h" |
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/* will be used in arch/s390/kernel/uv.c */ |
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#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST |
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int __bootdata_preserved(prot_virt_guest); |
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#endif |
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#if IS_ENABLED(CONFIG_KVM) |
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int __bootdata_preserved(prot_virt_host); |
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#endif |
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struct uv_info __bootdata_preserved(uv_info); |
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void uv_query_info(void) |
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{ |
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struct uv_cb_qui uvcb = { |
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.header.cmd = UVC_CMD_QUI, |
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.header.len = sizeof(uvcb) |
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}; |
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if (!test_facility(158)) |
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return; |
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/* rc==0x100 means that there is additional data we do not process */ |
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if (uv_call(0, (uint64_t)&uvcb) && uvcb.header.rc != 0x100) |
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return; |
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if (IS_ENABLED(CONFIG_KVM)) { |
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memcpy(uv_info.inst_calls_list, uvcb.inst_calls_list, sizeof(uv_info.inst_calls_list)); |
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uv_info.uv_base_stor_len = uvcb.uv_base_stor_len; |
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uv_info.guest_base_stor_len = uvcb.conf_base_phys_stor_len; |
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uv_info.guest_virt_base_stor_len = uvcb.conf_base_virt_stor_len; |
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uv_info.guest_virt_var_stor_len = uvcb.conf_virt_var_stor_len; |
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uv_info.guest_cpu_stor_len = uvcb.cpu_stor_len; |
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uv_info.max_sec_stor_addr = ALIGN(uvcb.max_guest_stor_addr, PAGE_SIZE); |
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uv_info.max_num_sec_conf = uvcb.max_num_sec_conf; |
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uv_info.max_guest_cpu_id = uvcb.max_guest_cpu_id; |
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uv_info.uv_feature_indications = uvcb.uv_feature_indications; |
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} |
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#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST |
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if (test_bit_inv(BIT_UVC_CMD_SET_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list) && |
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test_bit_inv(BIT_UVC_CMD_REMOVE_SHARED_ACCESS, (unsigned long *)uvcb.inst_calls_list)) |
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prot_virt_guest = 1; |
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#endif |
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} |
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#if IS_ENABLED(CONFIG_KVM) |
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void adjust_to_uv_max(unsigned long *vmax) |
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{ |
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if (is_prot_virt_host() && uv_info.max_sec_stor_addr) |
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*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr); |
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} |
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static int is_prot_virt_host_capable(void) |
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{ |
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/* disable if no prot_virt=1 given on command-line */ |
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if (!is_prot_virt_host()) |
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return 0; |
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/* disable if protected guest virtualization is enabled */ |
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if (is_prot_virt_guest()) |
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return 0; |
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/* disable if no hardware support */ |
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if (!test_facility(158)) |
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return 0; |
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/* disable if kdump */ |
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if (oldmem_data.start) |
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return 0; |
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/* disable if stand-alone dump */ |
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if (ipl_block_valid && is_ipl_block_dump()) |
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return 0; |
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return 1; |
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} |
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void sanitize_prot_virt_host(void) |
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{ |
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prot_virt_host = is_prot_virt_host_capable(); |
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} |
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#endif
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