| Message ID | 1528721608-15443-2-git-send-email-diana.craciun@nxp.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | powerpc/fsl: Speculation barrier for NXP PowerPC Book3E | expand |
Diana Craciun <diana.craciun@nxp.com> writes: > The speculation barrier can be disabled from the command line > with the parameter: "nospectre_v1". Can you please send another patch adding it to Documentation/admin-guide/kernel-parameters.txt You should mark it as "PPC" only for now. cheers
diff --git a/arch/powerpc/kernel/security.c b/arch/powerpc/kernel/security.c index 3eb9c45..c55e102 100644 --- a/arch/powerpc/kernel/security.c +++ b/arch/powerpc/kernel/security.c @@ -16,6 +16,7 @@ unsigned long powerpc_security_features __read_mostly = SEC_FTR_DEFAULT; bool barrier_nospec_enabled; +static bool no_nospec; static void enable_barrier_nospec(bool enable) { @@ -42,9 +43,18 @@ void setup_barrier_nospec(void) enable = security_ftr_enabled(SEC_FTR_FAVOUR_SECURITY) && security_ftr_enabled(SEC_FTR_BNDS_CHK_SPEC_BAR); - enable_barrier_nospec(enable); + if (!no_nospec) + enable_barrier_nospec(enable); } +static int __init handle_nospectre_v1(char *p) +{ + no_nospec = true; + + return 0; +} +early_param("nospectre_v1", handle_nospectre_v1); + #ifdef CONFIG_DEBUG_FS static int barrier_nospec_set(void *data, u64 val) {
The speculation barrier can be disabled from the command line with the parameter: "nospectre_v1". Signed-off-by: Diana Craciun <diana.craciun@nxp.com> --- arch/powerpc/kernel/security.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-)