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| author | David Vrabel <david.vrabel@citrix.com> | 2014-06-16 13:07:00 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-08-07 16:53:53 -0700 |
| commit | 03b3b027c75bbb243de7d720595bc0c6dab05bd7 (patch) | |
| tree | 8076343813e2a4832aae541da733921e144137ad | |
| parent | 6e285bbe0c0e065f2602375e75069220211e47f7 (diff) | |
| download | lwn-03b3b027c75bbb243de7d720595bc0c6dab05bd7.tar.gz lwn-03b3b027c75bbb243de7d720595bc0c6dab05bd7.zip | |
x86/xen: no need to explicitly register an NMI callback
commit ea9f9274bf4337ba7cbab241c780487651642d63 upstream.
Remove xen_enable_nmi() to fix a 64-bit guest crash when registering
the NMI callback on Xen 3.1 and earlier.
It's not needed since the NMI callback is set by a set_trap_table
hypercall (in xen_load_idt() or xen_write_idt_entry()).
It's also broken since it only set the current VCPU's callback.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Tested-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Cc: Steven Noonan <steven@uplinklabs.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/xen/setup.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c index 0982233b9b84..a6a72ce8630f 100644 --- a/arch/x86/xen/setup.c +++ b/arch/x86/xen/setup.c @@ -574,13 +574,7 @@ void xen_enable_syscall(void) } #endif /* CONFIG_X86_64 */ } -void xen_enable_nmi(void) -{ -#ifdef CONFIG_X86_64 - if (register_callback(CALLBACKTYPE_nmi, (char *)nmi)) - BUG(); -#endif -} + void __init xen_pvmmu_arch_setup(void) { HYPERVISOR_vm_assist(VMASST_CMD_enable, VMASST_TYPE_4gb_segments); @@ -595,7 +589,6 @@ void __init xen_pvmmu_arch_setup(void) xen_enable_sysenter(); xen_enable_syscall(); - xen_enable_nmi(); } /* This function is not called for HVM domains */ |