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| author | Peter Zijlstra <peterz@infradead.org> | 2022-03-08 18:30:23 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-03-15 12:32:35 +0300 |
| commit | 5b2fc51576eff811a614e33cbbd0c3cb05022892 (patch) | |
| tree | 7e29a5e6c80c12bdc17ff1b832840f16ffcbb658 /arch/x86/xen/enlighten_pv.c | |
| parent | 8b87d8cec1b31ea710568ae49ba5f5146318da0d (diff) | |
| download | linux-5b2fc51576eff811a614e33cbbd0c3cb05022892.tar.xz | |
x86/ibt,xen: Sprinkle the ENDBR
Even though Xen currently doesn't advertise IBT, prepare for when it
will eventually do so and sprinkle the ENDBR dust accordingly.
Even though most of the entry points are IRET like, the CPL0
Hypervisor can set WAIT-FOR-ENDBR and demand ENDBR at these sites.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
Link: https://lore.kernel.org/r/20220308154317.873919996@infradead.org
Diffstat (limited to 'arch/x86/xen/enlighten_pv.c')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 3c7a55c43f13..5038edb79ad5 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -624,6 +624,9 @@ static struct trap_array_entry trap_array[] = { TRAP_ENTRY(exc_coprocessor_error, false ), TRAP_ENTRY(exc_alignment_check, false ), TRAP_ENTRY(exc_simd_coprocessor_error, false ), +#ifdef CONFIG_X86_KERNEL_IBT + TRAP_ENTRY(exc_control_protection, false ), +#endif }; static bool __ref get_trap_addr(void **addr, unsigned int ist) |