From: Mohamed Mediouni <mohamed@unpredictable.fr>
To: qemu-devel@nongnu.org
Cc: Mohamed Mediouni <mohamed@unpredictable.fr>,
Wei Liu <wei.liu@kernel.org>,
Phil Dennis-Jordan <phil@philjordan.eu>,
Pedro Barbuda <pbarbuda@microsoft.com>,
Roman Bolshakov <rbolshakov@ddn.com>
Subject: [PATCH 00/12] whpx: i386: Windows 10 and performance fixes
Date: Mon, 23 Mar 2026 20:36:33 +0100 [thread overview]
Message-ID: <20260323193645.82602-1-mohamed@unpredictable.fr> (raw)
On Windows 10, the paravirtualisation enlightenments aren't available.
And neither is performance monitoring. Using the former as a gate to
operate in a reduced-functionality mode on Windows 10.
And on the performance side, some state is really expensive to fetch
or write with Hyper-V so switch some less-essential state to on demand.
The effect of this is magnified on Windows 10 because Hyper-V enlightenments
are not available there.
Issue number: https://gitlab.com/qemu-project/qemu/-/work_items/3349
Mohamed Mediouni (12):
whpx: i386: workaround for Windows 10 support
whpx: i386: enable exceptions VM exit only when needed
whpx: i386: skip TSC read for MMIO exits
whpx: i386: skip XCRs read for MMIO exits
whpx: i386: don't restore segment registers after MMIO handling
target/i386: emulate: add new callbacks
whpx: i386: add implementation of new x86_emul_ops
target/i386: emulate: indirect access to CRs
whpx: i386: indirect access to CRs
target/i386: emulate: segmentation rework
whpx: i386: fetch segments on-demand
whpx: i386: fast runtime state reads
target/i386/emulate/x86_emu.h | 6 +
target/i386/emulate/x86_helpers.c | 84 +++++-----
target/i386/emulate/x86_mmu.c | 11 +-
target/i386/whpx/whpx-all.c | 263 +++++++++++++++++++++++++-----
4 files changed, 274 insertions(+), 90 deletions(-)
--
2.50.1 (Apple Git-155)
next reply other threads:[~2026-03-23 19:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-23 19:36 Mohamed Mediouni [this message]
2026-03-23 19:36 ` [PATCH 01/12] whpx: i386: workaround for Windows 10 support Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 02/12] whpx: i386: enable exceptions VM exit only when needed Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 03/12] whpx: i386: skip TSC read for MMIO exits Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 04/12] whpx: i386: skip XCRs " Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 05/12] whpx: i386: don't restore segment registers after MMIO handling Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 06/12] target/i386: emulate: add new callbacks Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 07/12] whpx: i386: add implementation of new x86_emul_ops Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 08/12] target/i386: emulate: indirect access to CRs Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 09/12] whpx: i386: " Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 10/12] target/i386: emulate: segmentation rework Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 11/12] whpx: i386: fetch segments on-demand Mohamed Mediouni
2026-03-23 19:36 ` [PATCH 12/12] whpx: i386: fast runtime state reads Mohamed Mediouni
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