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SubjectRe: [PATCH 11/16] x86/cpu: Print VMX features as separate line item in /proc/cpuinfo
On Mon, Oct 07, 2019 at 07:12:37PM +0200, Paolo Bonzini wrote:
> On 04/10/19 23:56, Sean Christopherson wrote:
> > diff --git a/arch/x86/kernel/cpu/proc.c b/arch/x86/kernel/cpu/proc.c
> > index cb2e49810d68..4eec8889b0ff 100644
> > --- a/arch/x86/kernel/cpu/proc.c
> > +++ b/arch/x86/kernel/cpu/proc.c
> > @@ -7,6 +7,10 @@
> >
> > #include "cpu.h"
> >
> > +#ifdef CONFIG_X86_VMX_FEATURE_NAMES
> > +extern const char * const x86_vmx_flags[NVMXINTS*32];
> > +#endif
> > +
> > /*
> > * Get CPU information for use by the procfs.
> > */
> > @@ -102,6 +106,17 @@ static int show_cpuinfo(struct seq_file *m, void *v)
> > if (cpu_has(c, i) && x86_cap_flags[i] != NULL)
> > seq_printf(m, " %s", x86_cap_flags[i]);
>
> I'm afraid this is going to break some scripts in the wild. I would
> simply remove the seq_puts below.

Can you elaborate? I'm having trouble connecting the dots...

> Paolo
>
> > +#ifdef CONFIG_X86_VMX_FEATURE_NAMES
> > + if (cpu_has(c, X86_FEATURE_VMX) && c->vmx_capability[0]) {
> > + seq_puts(m, "\nvmx flags\t:");
> > + for (i = 0; i < 32*NVMXINTS; i++) {
> > + if (test_bit(i, (unsigned long *)c->vmx_capability) &&
> > + x86_vmx_flags[i] != NULL)
> > + seq_printf(m, " %s", x86_vmx_flags[i]);
> > + }
> > + }
> > +#endif
> > +
> > seq_puts(m, "\nbugs\t\t:");
> > for (i = 0; i < 32*NBUGINTS; i++) {
> > unsigned int bug_bit = 32*NCAPINTS + i;

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