From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Xen-devel <xen-devel@lists.xenproject.org>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: [PATCH 0/2] x86/spec-ctrl: Reduce HVM RSB overhead
Date: Tue, 9 Aug 2022 18:00:14 +0100 [thread overview]
Message-ID: <20220809170016.25148-1-andrew.cooper3@citrix.com> (raw)
Xen happens to be not vulnerable to PBRSB, but it turns out we can improve the
performance on all eIBRS systems.
Andrew Cooper (2):
x86/spec-ctrl: Enumeration for PBRSB_NO
x86/spec-ctrl: Reduce HVM RSB overhead where possible
xen/arch/x86/hvm/vmx/entry.S | 1 +
xen/arch/x86/hvm/vmx/vmx.c | 20 ++++++-
xen/arch/x86/include/asm/cpufeatures.h | 1 +
xen/arch/x86/include/asm/msr-index.h | 1 +
xen/arch/x86/msr.c | 5 +-
xen/arch/x86/spec_ctrl.c | 106 +++++++++++++++++++++++++++++++--
6 files changed, 126 insertions(+), 8 deletions(-)
--
2.11.0
next reply other threads:[~2022-08-09 17:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-09 17:00 Andrew Cooper [this message]
2022-08-09 17:00 ` [PATCH 1/2] x86/spec-ctrl: Enumeration for PBRSB_NO Andrew Cooper
2022-08-10 7:10 ` Jan Beulich
2022-08-09 17:00 ` [PATCH 2/2] x86/spec-ctrl: Reduce HVM RSB overhead where possible Andrew Cooper
2022-08-09 20:20 ` Jason Andryuk
2022-08-11 17:05 ` Andrew Cooper
2022-08-10 8:00 ` Jan Beulich
2022-08-11 18:06 ` Andrew Cooper
2022-08-11 10:55 ` [PATCH 0/2] x86/spec-ctrl: Reduce HVM RSB overhead Andrew Cooper
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