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x-conformance=sidf_compatible IronPort-SDR: qfaZ0RqxZmeQcxt1yJBjRsUdMts8smtbgppL/N9i1wUd65UfZFwBkM1SkUqdBW/9ESOGIhtP8i HSYjn+Zwb+pXOdiQUYcHDH8M5w+sHtdn+M/k6JvY+wOLBEBBpMsS/zbHGpdmjSUkr6d6oaYAQo aH2wSrcTOt3URtPbK9EV9iNE5772KI709HgmxEgVkieUECzuM7yANPu9BjoN7Knu0QYT/4mh0k tDX6XXcyuBmRjV3xrveW5nD8KqP6LXdlS8I7/RpPsVEa7TFla8HAz8h4UVXI7l4rIMuqG4bBgK cHM= X-SBRS: 2.7 X-MesageID: 10617811 X-Ironport-Server: esa6.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.69,363,1571716800"; d="scan'208";a="10617811" From: Andrew Cooper To: Xen-devel Date: Fri, 27 Dec 2019 13:03:10 +0000 Message-ID: <20191227130310.27887-1-andrew.cooper3@citrix.com> X-Mailer: git-send-email 2.11.0 MIME-Version: 1.0 Subject: [Xen-devel] [PATCH] x86/boot: Fold gdt_48 into the bottom of trampoline_gdt X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Wei Liu , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Saves 8 bytes in the trampoline. Signed-off-by: Andrew Cooper Reviewed-by: Jan Beulich --- CC: Jan Beulich CC: Wei Liu CC: Roger Pau Monn=C3=A9 --- xen/arch/x86/boot/trampoline.S | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/xen/arch/x86/boot/trampoline.S b/xen/arch/x86/boot/trampoline.S index ef5baa31e0..4b9a9697e9 100644 --- a/xen/arch/x86/boot/trampoline.S +++ b/xen/arch/x86/boot/trampoline.S @@ -139,12 +139,13 @@ start64: .balign 8 .word 0 idt_48: .word 0, 0, 0 # base =3D limit =3D 0 - .word 0 -gdt_48: .word .Ltrampoline_gdt_end - trampoline_gdt - 1 - .long bootsym_rel(trampoline_gdt,4) =20 trampoline_gdt: - .quad 0x0000000000000000 /* 0x0000: unused */ + .word 0 /* 0x0000: unused (reused for GDTR) */ +gdt_48: + .word .Ltrampoline_gdt_end - trampoline_gdt - 1 + .long bootsym_rel(trampoline_gdt, 4) + .quad 0x00cf9b000000ffff /* 0x0008: ring 0 code, 32-bit mode */ .quad 0x00af9b000000ffff /* 0x0010: ring 0 code, 64-bit mode */ .quad 0x00cf93000000ffff /* 0x0018: ring 0 data */ --=20 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel