92 lines
2.7 KiB
C
92 lines
2.7 KiB
C
|
// SPDX-License-Identifier: GPL-2.0
|
||
|
|
#include <asm/uv.h>
|
||
|
|
#include <asm/boot_data.h>
|
||
|
|
#include <asm/facility.h>
|
||
|
|
#include <asm/sections.h>
|
||
|
|
|
||
|
|
#include "boot.h"
|
||
|
|
#include "uv.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;
|
||
|
|
uv_info.supp_se_hdr_ver = uvcb.supp_se_hdr_versions;
|
||
|
|
uv_info.supp_se_hdr_pcf = uvcb.supp_se_hdr_pcf;
|
||
|
|
uv_info.conf_dump_storage_state_len = uvcb.conf_dump_storage_state_len;
|
||
|
|
uv_info.conf_dump_finalize_len = uvcb.conf_dump_finalize_len;
|
||
|
|
uv_info.supp_att_req_hdr_ver = uvcb.supp_att_req_hdr_ver;
|
||
|
|
uv_info.supp_att_pflags = uvcb.supp_att_pflags;
|
||
|
|
}
|
||
|
|
|
||
|
|
#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)
|
||
|
|
unsigned long adjust_to_uv_max(unsigned long limit)
|
||
|
|
{
|
||
|
|
if (is_prot_virt_host() && uv_info.max_sec_stor_addr)
|
||
|
|
limit = min_t(unsigned long, limit, uv_info.max_sec_stor_addr);
|
||
|
|
return limit;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int is_prot_virt_host_capable(void)
|
||
|
|
{
|
||
|
|
/* disable if no prot_virt=1 given on command-line */
|
||
|
|
if (!is_prot_virt_host())
|
||
|
|
return 0;
|
||
|
|
/* disable if protected guest virtualization is enabled */
|
||
|
|
if (is_prot_virt_guest())
|
||
|
|
return 0;
|
||
|
|
/* disable if no hardware support */
|
||
|
|
if (!test_facility(158))
|
||
|
|
return 0;
|
||
|
|
/* disable if kdump */
|
||
|
|
if (oldmem_data.start)
|
||
|
|
return 0;
|
||
|
|
/* disable if stand-alone dump */
|
||
|
|
if (ipl_block_valid && is_ipl_block_dump())
|
||
|
|
return 0;
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
void sanitize_prot_virt_host(void)
|
||
|
|
{
|
||
|
|
prot_virt_host = is_prot_virt_host_capable();
|
||
|
|
}
|
||
|
|
#endif
|