[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
RE: [PATCH 1/2] x86/vmx: Calculate model-specific LBRs once at start of day
- To: "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
- Date: Thu, 12 Jan 2023 01:35:46 +0000
- Accept-language: en-US
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=062Pw/QjRa03xkcJKM56gTmrb5zWdQp44PYzHol87us=; b=XsFU9vHDr9LId4ZD+9+gx64xGKZkRNQpVZ5hDRA5CyGUMx+UBmyxgLUYZTLTBFJBvJZYSI5Qe3+OThVSrNDOrmH+Y3dS8y8+3OtCZ8zI1tgwIF+T6mxSF1uraUXYjuwubZaf9X3waGjw1Gsyqs5K/OKTLOWQRPXZTDr1I8m5zhPuSC54ixCgVJpuvuDA0hrYXAOrBF9MkRk70sFRPGV3CfGNlHocFVN8kM1MbQegOoRT7N4wao3niFIbKd4HupWR8/6lKKmRNVf04SsuTFTZ8JH2lsIt0buZIWXDwFKK9T8lUGQXQONcU898jxDuay4Xho0rMpqF30gsZwTAwmWG9Q==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=IJSZFLMHg12zsLcX+scT4ilOACJE82UZ4YGI1XLOHICIdjiC00ahc+K/zQE0OeqrI5M9b44QvhYd/77H4mfmeUu4ptfyiEN8bawt8Bn9xJ5iG98e3mR45hkE96T6zf6vhKQm64CPzbleptrD11F6/Qqh93Rxt4NXp4k83SgEksSp0+e0SQJvFyFrJsoYQ7LGSFbzs08XEPrJMoL3e+rcCIhSjq9GoHkPnhPPxi4/9wWlYymcWTZb2dY/Msb+cxFvAEN7dN4SPcgVQp99KWMxSzjNIeZttZ/VyOo4kitiZ+5iD+r8boN1ljLB0o/vsM91gpi4rgWdtD/2MWZQZqInhA==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com;
- Cc: "andrew.cooper3@xxxxxxxxxx" <andrew.cooper3@xxxxxxxxxx>, "Beulich, Jan" <JBeulich@xxxxxxxx>, Pau Monné, Roger <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, "Nakajima, Jun" <jun.nakajima@xxxxxxxxx>
- Delivery-date: Thu, 12 Jan 2023 01:36:12 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHZJCMqvD+lv3RMJEyTX9mVHWu5kK6aBACw
- Thread-topic: [PATCH 1/2] x86/vmx: Calculate model-specific LBRs once at start of day
> From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Sent: Monday, January 9, 2023 8:08 PM
>
> There is no point repeating this calculation at runtime, especially as it is
> in the fallback path of the WRSMR/RDMSR handlers.
>
> Move the infrastructure higher in vmx.c to avoid forward declarations,
> renaming last_branch_msr_get() to get_model_specific_lbr() to highlight that
> these are model-specific only.
>
> No practical change.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
|
