diff options
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/Makefile | 1 | ||||
| -rw-r--r-- | arch/s390/boot/startup.c | 2 | ||||
| -rw-r--r-- | arch/s390/boot/uv.c | 24 |
3 files changed, 27 insertions, 0 deletions
diff --git a/arch/s390/boot/Makefile b/arch/s390/boot/Makefile index 458d18c44c67..a5ae68b2aa84 100644 --- a/arch/s390/boot/Makefile +++ b/arch/s390/boot/Makefile @@ -30,6 +30,7 @@ CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char obj-y := head.o als.o startup.o mem_detect.o ipl_parm.o string.o ebcdic.o obj-y += sclp_early_core.o mem.o ipl_vmparm.o cmdline.o ctype.o +obj-$(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) += uv.o targets := bzImage startup.a section_cmp.boot.data section_cmp.boot.preserved.data $(obj-y) subdir- := compressed diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c index 57d7f9446e29..2bd4a62d436c 100644 --- a/arch/s390/boot/startup.c +++ b/arch/s390/boot/startup.c @@ -2,6 +2,7 @@ #include <linux/string.h> #include <asm/setup.h> #include <asm/sclp.h> +#include <asm/uv.h> #include "compressed/decompressor.h" #include "boot.h" @@ -53,6 +54,7 @@ void startup_kernel(void) { void *img; + uv_query_info(); rescue_initrd(); sclp_early_read_info(); store_ipl_parmblock(); diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c new file mode 100644 index 000000000000..ed007f4a6444 --- /dev/null +++ b/arch/s390/boot/uv.c @@ -0,0 +1,24 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <asm/uv.h> +#include <asm/facility.h> +#include <asm/sections.h> + +int __bootdata_preserved(prot_virt_guest); + +void uv_query_info(void) +{ + struct uv_cb_qui uvcb = { + .header.cmd = UVC_CMD_QUI, + .header.len = sizeof(uvcb) + }; + + if (!test_facility(158)) + return; + + if (uv_call(0, (uint64_t)&uvcb)) + return; + + 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; +} |