Re: [PATCH] kvm: vmx: Fix entry nubmer check for add_atomic_switch_msr()

[Xiaoyao Li]

On Mon, 2019-02-18 at 16:26 +0800, linux.intel.com wrote:
> On Fri, 2019-02-15 at 11:46 -0500, Konrad Rzeszutek Wilk wrote:
> > On Thu, Feb 14, 2019 at 12:08:58PM +0800, Xiaoyao Li wrote:
> > > Commit ca83b4a7f2d068da79a0 ("x86/KVM/VMX: Add find_msr() helper
> > > function")
> > > introduces the helper function find_msr(), which returns -ENOENT when
> > > not find the msr in vmx->msr_autoload.guest/host. Correct checking contion
> > 
> > s/not find/cannot find/
> > s/contion/condition/ ?
> > 
> 
> Hi Paolo,
> Could you correct these typos in KVM tree or when sending a PR?
> 

Please disregard this. I just noticed tha this patch had been merged into
mainline.

> > > of no more available entry in vmx->msr_autoload.
> > > 
> > > Fixes: ca83b4a7f2d0 ("x86/KVM/VMX: Add find_msr() helper function")
> > > Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxxxxxxxx>
> > > ---
> > >  arch/x86/kvm/vmx/vmx.c | 3 ++-
> > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > > 
> > > diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
> > > index 95d618045001..1aaef2d536bd 100644
> > > --- a/arch/x86/kvm/vmx/vmx.c
> > > +++ b/arch/x86/kvm/vmx/vmx.c
> > > @@ -863,7 +863,8 @@ static void add_atomic_switch_msr(struct vcpu_vmx
> > > *vmx,
> > > unsigned msr,
> > >  	if (!entry_only)
> > >  		j = find_msr(&m->host, msr);
> > >  
> > > -	if (i == NR_AUTOLOAD_MSRS || j == NR_AUTOLOAD_MSRS) {
> > > +	if ((i < 0 && m->guest.nr == NR_AUTOLOAD_MSRS) ||
> > > +		(j < 0 &&  m->host.nr == NR_AUTOLOAD_MSRS)) {
> > >  		printk_once(KERN_WARNING "Not enough msr switch entries. "
> > >  				"Can't add msr %x\n", msr);
> > >  		return;
> > > -- 
> > > 2.19.1
> > >