Message ID | 20230915151240.128778-4-tim.gardner@canonical.com |
---|---|
State | New |
Headers | show |
Series | [xenial,linux] x86/fpu: Set X86_FEATURE_OSXSAVE feature after enabling OSXSAVE in CR4 | expand |
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 3fa200ecca62..b30b53c7a648 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -648,6 +648,13 @@ void __init fpu__init_system_xstate(void) setup_init_fpu_buf(); setup_xstate_comp(); + /* + * CPU capabilities initialization runs before FPU init. So + * X86_FEATURE_OSXSAVE is not set. Now that XSAVE is completely + * functional, set the feature bit so depending code works. + */ + setup_force_cpu_cap(X86_FEATURE_OSXSAVE); + pr_info("x86/fpu: Enabled xstate features 0x%llx, context size is %d bytes, using '%s' format.\n", xfeatures_mask, xstate_size,