From: Wei Liu <wei.liu2@citrix.com>
To: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>, Xen-devel <xen-devel@lists.xen.org>
Subject: Re: [PATCH v6.5 25/26] x86/cpuid: Offer Indirect Branch Controls to guests
Date: Tue, 9 Jan 2018 11:44:12 +0000 [thread overview]
Message-ID: <20180109114412.tp6hdu4z7dkhhhl6@citrix.com> (raw)
In-Reply-To: <1515024955-13390-26-git-send-email-andrew.cooper3@citrix.com>
On Thu, Jan 04, 2018 at 12:15:54AM +0000, Andrew Cooper wrote:
> With all infrastructure in place, it is now safe to let guests see and use
> these features. Allow AMD's IBPB to be set even on Intel hardware, so the
> toolstack can express "IBPB only" to guests.
>
> This also requires updating the libxc logic to understand the e8b feature
> leaf, which has the side effect of also offering CLZERO on applicable
> hardware.
>
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
> Acked-by: Jan Beulich <jbeulich@suse.com>
> ---
> v4:
> * Adjust for AMD changes
> v5:
> * Support for IBRB-only
> v6:
> * Fix AMD CPUID
> ---
> tools/libxc/xc_cpuid_x86.c | 4 +++-
Acked-by: Wei Liu <wei.liu2@citrix.com>
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next prev parent reply other threads:[~2018-01-09 11:44 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-04 0:15 [PATCH v6.5 00/26] x86: Mitigations for SP2/CVE-2017-5715/Branch Target Injection Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 01/26] x86/alt: Break out alternative-asm into a separate header file Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 02/26] x86/alt: Introduce ALTERNATIVE{, _2} macros Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 03/26] x86/hvm: Rename update_guest_vendor() callback to cpuid_policy_changed() Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 04/26] x86: Introduce a common cpuid_policy_updated() Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 05/26] x86/entry: Remove support for partial cpu_user_regs frames Andrew Cooper
2018-01-04 8:51 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 06/26] x86/entry: Rearrange RESTORE_ALL to restore register in stack order Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 07/26] x86/hvm: Use SAVE_ALL to construct the cpu_user_regs frame after VMExit Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 08/26] x86/entry: Erase guest GPR state on entry to Xen Andrew Cooper
2018-01-22 10:04 ` David Woodhouse
2018-01-22 10:18 ` Andrew Cooper
2018-01-22 10:27 ` David Woodhouse
2018-01-04 0:15 ` [PATCH v6.5 09/26] x86: Support compiling with indirect branch thunks Andrew Cooper
2018-01-04 9:02 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 10/26] common/wait: Clarifications to wait infrastructure Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 11/26] x86: Support indirect thunks from assembly code Andrew Cooper
2018-01-04 9:23 ` Jan Beulich
2018-01-08 18:24 ` Andrew Cooper
2018-01-09 8:36 ` Jan Beulich
2018-01-09 11:23 ` Andrew Cooper
2018-01-09 13:18 ` Jan Beulich
2018-01-11 13:03 ` David Woodhouse
2018-01-11 13:41 ` Andrew Cooper
2018-01-11 13:46 ` David Woodhouse
2018-01-04 0:15 ` [PATCH v6.5 12/26] x86/boot: Report details of speculative mitigations Andrew Cooper
2018-01-04 9:29 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 13/26] x86/amd: Try to set lfence as being Dispatch Serialising Andrew Cooper
2018-01-04 9:32 ` Jan Beulich
2018-01-08 19:01 ` Andrew Cooper
2018-01-09 8:38 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 14/26] x86: Introduce alternative indirect thunks Andrew Cooper
2018-01-04 9:40 ` Jan Beulich
2018-01-09 11:44 ` Andrew Cooper
2018-01-09 13:24 ` Jan Beulich
2018-01-09 13:30 ` Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 15/26] x86/feature: Definitions for Indirect Branch Controls Andrew Cooper
2018-01-04 1:14 ` Doug Goldstein
2018-01-04 1:16 ` Andrew Cooper
2018-01-04 4:05 ` Anthony Liguori
2018-01-04 9:42 ` Jan Beulich
2018-01-04 18:51 ` Wei Liu
2018-01-04 0:15 ` [PATCH v6.5 16/26] x86/cmdline: Introduce a command line option to disable IBRS/IBPB, STIBP and IBPB Andrew Cooper
2018-01-04 9:43 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 17/26] x86/msr: Emulation of MSR_{SPEC_CTRL, PRED_CMD} for guests Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 18/26] x86/migrate: Move MSR_SPEC_CTRL on migrate Andrew Cooper
2018-01-04 0:15 ` [PATCH v6.5 19/26] x86/hvm: Permit guests direct access to MSR_{SPEC_CTRL, PRED_CMD} Andrew Cooper
2018-01-04 9:52 ` Jan Beulich
2018-01-09 12:03 ` Andrew Cooper
2018-01-09 13:28 ` Jan Beulich
2018-01-09 13:34 ` Andrew Cooper
2018-01-09 13:58 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 20/26] x86: Protect unaware domains from meddling hyperthreads Andrew Cooper
2018-01-04 9:59 ` Jan Beulich
2018-01-09 14:21 ` Andrew Cooper
2018-01-09 14:29 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 21/26] x86/entry: Use MSR_SPEC_CTRL at each entry/exit point Andrew Cooper
2018-01-04 10:14 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 22/26] x86/boot: Calculate the most appropriate BTI mitigation to use Andrew Cooper
2018-01-04 10:17 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 23/26] x86/entry: Clobber the Return Stack Buffer on entry to Xen Andrew Cooper
2018-01-04 10:22 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 24/26] x86/ctxt: Issue a speculation barrier between vcpu contexts Andrew Cooper
2018-01-04 10:25 ` Jan Beulich
2018-01-04 0:15 ` [PATCH v6.5 25/26] x86/cpuid: Offer Indirect Branch Controls to guests Andrew Cooper
2018-01-09 11:44 ` Wei Liu [this message]
2018-01-04 0:15 ` [PATCH v6.5 26/26] x86/idle: Clear SPEC_CTRL while idle Andrew Cooper
2018-01-04 10:29 ` Jan Beulich
2018-01-04 10:41 ` Jan Beulich
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