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| author | Andy Lutomirski <luto@kernel.org> | 2020-02-28 10:42:48 -0800 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-05-19 15:53:57 +0200 |
| commit | ef68017eb5704eb2b0577c3aa6619e13caf2b59f (patch) | |
| tree | a2a446d82225fc8adf7badb026cb869573371a39 /arch/x86/kernel/traps.c | |
| parent | af1e56b78534c38bb0e0c712ca70e59f816b74e9 (diff) | |
| download | linux-ef68017eb5704eb2b0577c3aa6619e13caf2b59f.tar.bz2 | |
x86/kvm: Handle async page faults directly through do_page_fault()
KVM overloads #PF to indicate two types of not-actually-page-fault
events. Right now, the KVM guest code intercepts them by modifying
the IDT and hooking the #PF vector. This makes the already fragile
fault code even harder to understand, and it also pollutes call
traces with async_page_fault and do_async_page_fault for normal page
faults.
Clean it up by moving the logic into do_page_fault() using a static
branch. This gets rid of the platform trap_init override mechanism
completely.
[ tglx: Fixed up 32bit, removed error code from the async functions and
massaged coding style ]
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134059.169270470@linutronix.de
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index d54cffdc7cac..821fac47eef6 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -983,7 +983,5 @@ void __init trap_init(void) idt_setup_ist_traps(); - x86_init.irqs.trap_init(); - idt_setup_debugidt_traps(); } |