From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com,
david.vrabel@citrix.com, konrad.wilk@oracle.com
Cc: linux-kernel@vger.kernel.org,
virtualization@lists.linux-foundation.org, luto@kernel.org,
xen-devel@lists.xenproject.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
bp@suse.de
Subject: [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit
Date: Wed, 18 Nov 2015 15:06:16 -0500 [thread overview]
Message-ID: <1447877179-2775-1-git-send-email-boris.ostrovsky__10354.4120946482$1447877477$gmane$org@oracle.com> (raw)
The first patch fixes Xen PV regression introduced by 32-bit rewrite. Unlike the
earlier version it uses ALTERNATIVE instruction and avoids using xen_sysexit
(and sysret32 in compat mode) pv ops, as suggested by Andy. (I ended up patching
TEST with XOR to avoid extra NOPs, even though I said yesterday it would be
wrong. It's not wrong)
As result of this patch irq_enable_sysexit and usergs_sysret32 pv ops are not
used anymore by anyone and so can be removed.
Boris Ostrovsky (3):
x86/xen: Avoid fast syscall path for Xen PV guests
x86: irq_enable_sysexit pv op is no longer needed
x86: usergs_sysret32 pv op is no longer needed
arch/x86/entry/entry_32.S | 11 ++++-------
arch/x86/entry/entry_64_compat.S | 16 ++++++----------
arch/x86/include/asm/cpufeature.h | 1 +
arch/x86/include/asm/paravirt.h | 12 ------------
arch/x86/include/asm/paravirt_types.h | 17 -----------------
arch/x86/kernel/asm-offsets.c | 3 ---
arch/x86/kernel/asm-offsets_64.c | 1 -
arch/x86/kernel/paravirt.c | 12 ------------
arch/x86/kernel/paravirt_patch_32.c | 2 --
arch/x86/kernel/paravirt_patch_64.c | 3 ---
arch/x86/xen/enlighten.c | 7 +++----
arch/x86/xen/xen-asm_32.S | 14 --------------
arch/x86/xen/xen-asm_64.S | 19 -------------------
arch/x86/xen/xen-ops.h | 3 ---
14 files changed, 14 insertions(+), 107 deletions(-)
--
1.8.1.4
next reply other threads:[~2015-11-18 20:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-18 20:06 Boris Ostrovsky [this message]
-- strict thread matches above, loose matches on Subject: below --
2015-11-18 20:06 [PATCH 0/3] Fix and cleanup for 32-bit PV sysexit Boris Ostrovsky
2015-11-19 12:10 ` Borislav Petkov
2015-11-19 12:10 ` Borislav Petkov
2015-11-19 12:10 ` Borislav Petkov
2015-11-18 20:06 Boris Ostrovsky
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='1447877179-2775-1-git-send-email-boris.ostrovsky__10354.4120946482$1447877477$gmane$org@oracle.com' \
--to=boris.ostrovsky@oracle.com \
--cc=bp@suse.de \
--cc=david.vrabel@citrix.com \
--cc=hpa@zytor.com \
--cc=konrad.wilk@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=luto@kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=virtualization@lists.linux-foundation.org \
--cc=xen-devel@lists.xenproject.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.