diff options
Diffstat (limited to 'arch/s390/boot/uv.c')
| -rw-r--r-- | arch/s390/boot/uv.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c index 87641dd65ccf..82b99b916243 100644 --- a/arch/s390/boot/uv.c +++ b/arch/s390/boot/uv.c @@ -44,3 +44,28 @@ void uv_query_info(void) prot_virt_guest = 1; #endif } + +#if IS_ENABLED(CONFIG_KVM) +static bool has_uv_sec_stor_limit(void) +{ + /* + * keep these conditions in line with setup_uv() + */ + if (!is_prot_virt_host()) + return false; + + if (is_prot_virt_guest()) + return false; + + if (!test_facility(158)) + return false; + + return !!uv_info.max_sec_stor_addr; +} + +void adjust_to_uv_max(unsigned long *vmax) +{ + if (has_uv_sec_stor_limit()) + *vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr); +} +#endif |