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| author |   Thomas Gleixner <tglx@linutronix.de> | 2021-06-23 14:02:16 +0200 |
|---|---|---|
| committer |   Borislav Petkov <bp@suse.de> | 2021-06-23 19:29:52 +0200 |
| commit | 65e952102122bf89f0e4f1bebf8664e32587aaed (patch) | |
| tree | 4a32639ae1b4e4390e66a22d102aac2f5ad5cb71 /arch/x86/include/asm/fpu/internal.h | |
| parent | x86/fpu: Move FXSAVE_LEAK quirk info __copy_kernel_to_fpregs() (diff) | |
| download | linux-dev-65e952102122bf89f0e4f1bebf8664e32587aaed.tar.xz linux-dev-65e952102122bf89f0e4f1bebf8664e32587aaed.zip | |
x86/fpu: Rename xfeatures_mask_user() to xfeatures_mask_uabi()
Rename it so it's clear that this is about user ABI features which can
differ from the feature set which the kernel saves and restores because the
kernel handles e.g. PKRU differently. But the user ABI (ptrace, signal
frame) expects it to be there.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210623121456.211585137@linutronix.de
Diffstat (limited to 'arch/x86/include/asm/fpu/internal.h')
| -rw-r--r-- | arch/x86/include/asm/fpu/internal.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/include/asm/fpu/internal.h b/arch/x86/include/asm/fpu/internal.h index 63d979656437..bcfb6365a76b 100644 --- a/arch/x86/include/asm/fpu/internal.h +++ b/arch/x86/include/asm/fpu/internal.h @@ -324,7 +324,12 @@ static inline void os_xrstor(struct xregs_state *xstate, u64 mask) */ static inline int xsave_to_user_sigframe(struct xregs_state __user *buf) { - u64 mask = xfeatures_mask_user(); + /* + * Include the features which are not xsaved/rstored by the kernel + * internally, e.g. PKRU. That's user space ABI and also required + * to allow the signal handler to modify PKRU. + */ + u64 mask = xfeatures_mask_uabi(); u32 lmask = mask; u32 hmask = mask >> 32; int err; |