forked from luck/tmp_suning_uos_patched
ecdc5d842b
Add "prot_virt" command line option which controls if the kernel protected VMs support is enabled at early boot time. This has to be done early, because it needs large amounts of memory and will disable some features like STP time sync for the lpar. Extend ultravisor info definitions and expose it via uv_info struct filled in during startup. Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> [borntraeger@de.ibm.com: patch merging, splitting, fixing] Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
// 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)
|
|
struct uv_info __bootdata_preserved(uv_info);
|
|
#endif
|
|
|
|
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_cpus = uvcb.max_guest_cpus;
|
|
}
|
|
|
|
#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
|
|
}
|