From: Radim Krčmář <rkrcmar@redhat.com>
Date: Thu, 20 Nov 2014 13:43:18 +0000 (+0100)
Subject: kvm: remove IA64 ioctls
X-Git-Tag: omap-for-v3.19/fixes-rc1~43^2~40
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6b397158d07f885154b871a15f879d25b3de7579;p=pandora-kernel.git

kvm: remove IA64 ioctls

KVM ia64 is no longer present so new applications shouldn't use them.
The main problem is that they most likely didn't work even before,
because of a conflict in the #defines:

  #define KVM_SET_GUEST_DEBUG       _IOW(KVMIO,  0x9b, struct kvm_guest_debug)
  #define KVM_IA64_VCPU_SET_STACK   _IOW(KVMIO,  0x9b, void *)

The argument to KVM_SET_GUEST_DEBUG is:

  struct kvm_guest_debug {
  	__u32 control;
  	__u32 pad;
  	struct kvm_guest_debug_arch arch;
  };

  struct kvm_guest_debug_arch {
  };

meaning that sizeof(struct kvm_guest_debug) == sizeof(void *) == 8
and KVM_SET_GUEST_DEBUG == KVM_IA64_VCPU_SET_STACK.

KVM_SET_GUEST_DEBUG is handled in virt/kvm/kvm_main.c before even calling
kvm_arch_vcpu_ioctl (which would have handled KVM_IA64_VCPU_SET_STACK),
so KVM_IA64_VCPU_SET_STACK would just return -EINVAL.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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