linux-kernel - [PATCH v2 0/3] x86/realmode: use a dummy trampoline for Xen PV guests

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Date:   Tue, 22 Nov 2022 17:38:07 +0100
From:   Juergen Gross <jgross@...e.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-efi@...r.kernel.org, platform-driver-x86@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Ard Biesheuvel <ardb@...nel.org>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        xen-devel@...ts.xenproject.org
Subject: [PATCH v2 0/3] x86/realmode: use a dummy trampoline for Xen PV guests

A Xen PV guests can't run in realmode, so the realmode trampoline can
omitted.

Changes in V2:
- complete new approach

Juergen Gross (3):
  x86/realmode: test real_mode_header outside of real_mode_size_needed()
  x86/realmode: add trampoline reference structure
  x86/xen: add a dummy trampoline for Xen PV guests

 arch/x86/include/asm/realmode.h | 15 +++++++++++----
 arch/x86/platform/efi/quirks.c  |  3 ++-
 arch/x86/realmode/init.c        | 25 ++++++++++++++++++++-----
 arch/x86/xen/enlighten_pv.c     | 17 +++++++++++++++++
 4 files changed, 50 insertions(+), 10 deletions(-)

-- 
2.35.3