Re: [PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-27 Thread Prarit Bhargava
On 2/21/19 8:48 AM, Peter Zijlstra wrote: > On Thu, Feb 21, 2019 at 08:12:25AM -0500, Prarit Bhargava wrote: >> Users cannot disable multiple CPU features with the kernel parameter >> clearcpuid=. For example, "clearcpuid=154 clearcpuid=227" only disables >> CPUID bit 154. >> >> Previous to

Re: [PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-21 Thread Prarit Bhargava
On 2/21/19 1:58 PM, Andi Kleen wrote: > On Thu, Feb 21, 2019 at 02:37:45PM +0100, Peter Zijlstra wrote: >> On Thu, Feb 21, 2019 at 08:12:25AM -0500, Prarit Bhargava wrote: >>> Users cannot disable multiple CPU features with the kernel parameter >>> clearcpuid=. For example, "clearcpuid=154

Re: [PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-21 Thread Andi Kleen
On Thu, Feb 21, 2019 at 02:37:45PM +0100, Peter Zijlstra wrote: > On Thu, Feb 21, 2019 at 08:12:25AM -0500, Prarit Bhargava wrote: > > Users cannot disable multiple CPU features with the kernel parameter > > clearcpuid=. For example, "clearcpuid=154 clearcpuid=227" only disables > > CPUID bit

Re: [PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-21 Thread Peter Zijlstra
On Thu, Feb 21, 2019 at 08:12:25AM -0500, Prarit Bhargava wrote: > Users cannot disable multiple CPU features with the kernel parameter > clearcpuid=. For example, "clearcpuid=154 clearcpuid=227" only disables > CPUID bit 154. > > Previous to commit 0c2a3913d6f5 ("x86/fpu: Parse clearcpuid= as

Re: [PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-21 Thread Peter Zijlstra
On Thu, Feb 21, 2019 at 08:12:25AM -0500, Prarit Bhargava wrote: > Users cannot disable multiple CPU features with the kernel parameter > clearcpuid=. For example, "clearcpuid=154 clearcpuid=227" only disables > CPUID bit 154. > > Previous to commit 0c2a3913d6f5 ("x86/fpu: Parse clearcpuid= as

[PATCH] x86/fpu: Parse comma separated list passed in clearcpuid

2019-02-21 Thread Prarit Bhargava
Users cannot disable multiple CPU features with the kernel parameter clearcpuid=. For example, "clearcpuid=154 clearcpuid=227" only disables CPUID bit 154. Previous to commit 0c2a3913d6f5 ("x86/fpu: Parse clearcpuid= as early XSAVE argument") it was possible to pass multiple clearcpuid options