From: "Chang S. Bae" <chang.seok.bae@intel.com>
To: Pengfei Xu <pengfei.xu@intel.com>,
Shuah Khan <skhan@linuxfoundation.org>,
linux-kselftest <linux-kselftest@vger.kernel.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Cc: Heng Su <heng.su@intel.com>, Hansen Dave <dave.hansen@intel.com>,
"Luck Tony" <tony.luck@intel.com>,
Mehta Sohil <sohil.mehta@intel.com>,
Chen Yu C <yu.c.chen@intel.com>,
Andy Lutomirski <luto@kernel.org>, Borislav Petkov <bp@suse.de>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH v8 1/1] selftests/x86/xstate: Add xstate test cases for XSAVE feature
Date: Thu, 24 Mar 2022 03:06:50 -0700 [thread overview]
Message-ID: <eb0c4940-569b-656f-424c-4248929cc74c@intel.com> (raw)
In-Reply-To: <4268a0203fd6e42a31bde3254ee50dd93fd233ea.1646999762.git.pengfei.xu@intel.com>
On 3/16/2022 5:40 AM, Pengfei Xu wrote:
>
> +static inline void check_cpuid_xsave_availability(void)
> +{
> + uint32_t eax, ebx, ecx, edx;
> +
> + /*
> + * CPUID.1:ECX.XSAVE[bit 26] enumerates general
> + * support for the XSAVE feature set, including
> + * XGETBV.
> + */
> + __cpuid_count(1, 0, eax, ebx, ecx, edx);
> + if (!(ecx & CPUID_LEAF1_ECX_XSAVE_MASK))
> + fatal_error("cpuid: no CPU xsave support");
> + if (!(ecx & CPUID_LEAF1_ECX_OSXSAVE_MASK))
> + fatal_error("cpuid: no OS xsave support");
We need to skip the test when XSAVE is not available. See the point
here: https://lore.kernel.org/lkml/8735j8aa9g.ffs@tglx/
Thanks,
Chang
next prev parent reply other threads:[~2022-03-24 10:07 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-16 12:40 [PATCH v8 0/1] Introduce XSAVE feature self-test Pengfei Xu
2022-03-16 12:40 ` [PATCH v8 1/1] selftests/x86/xstate: Add xstate test cases for XSAVE feature Pengfei Xu
2022-03-24 10:06 ` Chang S. Bae [this message]
2022-03-24 11:37 ` Pengfei Xu
2022-04-08 16:58 ` Dave Hansen
2022-04-11 10:14 ` Pengfei Xu
2022-04-11 14:42 ` Dave Hansen
2022-04-12 14:01 ` Pengfei Xu
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