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| author |   Vasily Gorbik <gor@linux.ibm.com> | 2019-04-01 19:11:03 +0200 |
|---|---|---|
| committer |   Martin Schwidefsky <schwidefsky@de.ibm.com> | 2019-04-10 17:47:21 +0200 |
| commit | 5abb9351dfd937d43193f4d09af9c72bfe2c4180 (patch) | |
| tree | 5ed221cbfec7483c3438f3ddd6a76829a5812c58 /arch/s390/kernel/setup.c | |
| parent | s390: introduce .boot.preserved.data section compile time validation (diff) | |
| download | linux-dev-5abb9351dfd937d43193f4d09af9c72bfe2c4180.tar.xz linux-dev-5abb9351dfd937d43193f4d09af9c72bfe2c4180.zip | |
s390/uv: introduce guest side ultravisor code
The Ultravisor Call Facility (stfle bit 158) defines an API to the
Ultravisor (UV calls), a mini hypervisor located at machine
level. With help of the Ultravisor, KVM will be able to run
"protected" VMs, special VMs whose memory and management data are
unavailable to KVM.
The protected VMs can also request services from the Ultravisor.
The guest api consists of UV calls to share and unshare memory with the
kvm hypervisor.
To enable this feature support PROTECTED_VIRTUALIZATION_GUEST kconfig
option has been introduced.
Co-developed-by: Janosch Frank <frankja@de.ibm.com>
Signed-off-by: Janosch Frank <frankja@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/setup.c')
| -rw-r--r-- | arch/s390/kernel/setup.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 2c642af526ce..70197a68e6fa 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -70,6 +70,7 @@ #include <asm/alternative.h> #include <asm/nospec-branch.h> #include <asm/mem_detect.h> +#include <asm/uv.h> #include "entry.h" /* @@ -89,6 +90,10 @@ char elf_platform[ELF_PLATFORM_SIZE]; unsigned long int_hwcap = 0; +#ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST +int __bootdata_preserved(prot_virt_guest); +#endif + int __bootdata(noexec_disabled); int __bootdata(memory_end_set); unsigned long __bootdata(memory_end); |