diff options
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/idreg-override.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kvm/arm.c | 3 |
3 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index a10b545c2070..41786d205e0d 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -2257,6 +2257,9 @@ kvm-arm.mode= [KVM,ARM] Select one of KVM/arm64's modes of operation. + nvhe: Standard nVHE-based mode, without support for + protected guests. + protected: nVHE-based mode with support for guests whose state is kept private from the host. Not valid if the kernel is running in EL2. diff --git a/arch/arm64/kernel/idreg-override.c b/arch/arm64/kernel/idreg-override.c index 226bac544e20..b994d689d6fb 100644 --- a/arch/arm64/kernel/idreg-override.c +++ b/arch/arm64/kernel/idreg-override.c @@ -45,6 +45,8 @@ static const struct { char alias[FTR_ALIAS_NAME_LEN]; char feature[FTR_ALIAS_OPTION_LEN]; } aliases[] __initconst = { + { "kvm-arm.mode=nvhe", "id_aa64mmfr1.vh=0" }, + { "kvm-arm.mode=protected", "id_aa64mmfr1.vh=0" }, }; static int __init find_field(const char *cmdline, diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index 04c44853b103..597565a65ca2 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -1966,6 +1966,9 @@ static int __init early_kvm_mode_cfg(char *arg) return 0; } + if (strcmp(arg, "nvhe") == 0 && !WARN_ON(is_kernel_in_hyp_mode())) + return 0; + return -EINVAL; } early_param("kvm-arm.mode", early_kvm_mode_cfg); |