lkml.org 
[lkml]   [2015]   [Mar]   [5]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] kvm: move advertising of KVM_CAP_IRQFD to common code
On Thu,  5 Mar 2015 11:54:46 +0100
Paolo Bonzini <pbonzini@redhat.com> wrote:
> POWER supports irqfds but forgot to advertise them. Some userspace does
> not check for the capability, but others check it---thus they work on
> x86 and s390 but not POWER.
>
> To avoid that other architectures in the future make the same mistake, let
> common code handle KVM_CAP_IRQFD the same way as KVM_CAP_IRQFD_RESAMPLE.
>
> Reported-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
> Cc: stable@vger.kernel.org
> Fixes: 297e21053a52f060944e9f0de4c64fad9bcd72fc
> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
> ---

Thanks !

Tested-by: Greg Kurz <gkurz@linux.vnet.ibm.com>

> Marcelo, please apply this for 4.0.
> ---
> arch/s390/kvm/kvm-s390.c | 1 -
> arch/x86/kvm/x86.c | 1 -
> virt/kvm/kvm_main.c | 1 +
> 3 files changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 0c3623927563..17277968e50a 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -165,7 +165,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_ONE_REG:
> case KVM_CAP_ENABLE_CAP:
> case KVM_CAP_S390_CSS_SUPPORT:
> - case KVM_CAP_IRQFD:
> case KVM_CAP_IOEVENTFD:
> case KVM_CAP_DEVICE_CTRL:
> case KVM_CAP_ENABLE_CAP_VM:
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index bd7a70be41b3..32bf19ef3115 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -2744,7 +2744,6 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_USER_NMI:
> case KVM_CAP_REINJECT_CONTROL:
> case KVM_CAP_IRQ_INJECT_STATUS:
> - case KVM_CAP_IRQFD:
> case KVM_CAP_IOEVENTFD:
> case KVM_CAP_IOEVENTFD_NO_LENGTH:
> case KVM_CAP_PIT2:
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index a1093700f3a4..a2214d9609bd 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -2492,6 +2492,7 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
> case KVM_CAP_SIGNAL_MSI:
> #endif
> #ifdef CONFIG_HAVE_KVM_IRQFD
> + case KVM_CAP_IRQFD:
> case KVM_CAP_IRQFD_RESAMPLE:
> #endif
> case KVM_CAP_CHECK_EXTENSION_VM:



\
 
 \ /
  Last update: 2015-03-05 12:21    [W:0.072 / U:0.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site