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From: Sathyanarayanan Kuppuswamy  <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	x86@kernel.org, "H . Peter Anvin" <hpa@zytor.com>,
	Tony Luck <tony.luck@intel.com>,
	Dan Williams <dan.j.williams@intel.com>,
	Andi Kleen <ak@linux.intel.com>,
	Kirill Shutemov <kirill.shutemov@linux.intel.com>,
	Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 1/1] x86: Skip WBINVD instruction for VM guest
Date: Tue, 16 Nov 2021 08:36:53 -0800	[thread overview]
Message-ID: <f38216d7-4dcd-8eba-1825-c5bc79b0e1f5@linux.intel.com> (raw)
In-Reply-To: <YZPbQVwWOJCrAH78@zn.tnic>

Hi,

On 11/16/21 8:24 AM, Borislav Petkov wrote:
> On Mon, Nov 15, 2021 at 04:50:27PM -0800, Kuppuswamy Sathyanarayanan wrote:
>> -#define ACPI_FLUSH_CPU_CACHE()	wbinvd()
>> +#define ACPI_FLUSH_CPU_CACHE()				\
>> +do {							\
>> +	if (!boot_cpu_has(X86_FEATURE_HYPERVISOR))	\
> 
> cpu_feature_enabled()
> 
> If you wanna query a X86_FEATURE_* bit, from now on, use only this
> function.
> 

Ok. I will change it in next version.

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer

  reply	other threads:[~2021-11-16 16:36 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-16  0:50 [PATCH v1 1/1] x86: Skip WBINVD instruction for VM guest Kuppuswamy Sathyanarayanan
2021-11-16 16:24 ` Borislav Petkov
2021-11-16 16:36   ` Sathyanarayanan Kuppuswamy [this message]
2021-11-19  4:03   ` [PATCH v2] " Kuppuswamy Sathyanarayanan
2021-11-25  0:40     ` Thomas Gleixner
2021-12-02 22:21       ` Kirill A. Shutemov
2021-12-02 22:38         ` Dave Hansen
2021-12-02 23:48         ` Thomas Gleixner
2021-12-03 23:49           ` Kirill A. Shutemov
2021-12-04  0:20             ` Dave Hansen
2021-12-04  0:54               ` Kirill A. Shutemov
2021-12-06 15:35                 ` Dave Hansen
2021-12-06 16:39                   ` Dan Williams
2021-12-06 16:53                     ` Dave Hansen
2021-12-06 17:51                       ` Dan Williams
2021-12-04 20:27             ` Rafael J. Wysocki
2021-12-06 12:29               ` [PATCH 0/4] ACPI/ACPICA: Only flush caches on S1/S2/S3 and C3 Kirill A. Shutemov
2021-12-06 12:29                 ` [PATCH 1/4] ACPICA: Do not flush cache for on entering S4 and S5 Kirill A. Shutemov
2021-12-08 14:58                   ` Rafael J. Wysocki
2021-12-06 12:29                 ` [PATCH 2/4] ACPI: PM: Remove redundant cache flushing Kirill A. Shutemov
2021-12-07 16:35                   ` Rafael J. Wysocki
2021-12-09 13:32                     ` Kirill A. Shutemov
2021-12-17 18:04                       ` Rafael J. Wysocki
2021-12-06 12:29                 ` [PATCH 3/4] ACPI: processor idle: Only flush cache on entering C3 Kirill A. Shutemov
2021-12-06 15:03                   ` Peter Zijlstra
2021-12-08 16:26                     ` Rafael J. Wysocki
2021-12-09 13:33                       ` Kirill A. Shutemov
2021-12-17 17:58                         ` Rafael J. Wysocki
2021-12-06 12:29                 ` [PATCH 4/4] ACPI: PM: Avoid cache flush on entering S4 Kirill A. Shutemov
2021-12-08 15:10                   ` Rafael J. Wysocki
2021-12-08 16:04                     ` Kirill A. Shutemov
2021-12-08 16:16                       ` Rafael J. Wysocki

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