From: Ard Biesheuvel <ardb+git@google.com>
To: linux-kernel@vger.kernel.org
Cc: Ard Biesheuvel <ardb@kernel.org>,
Jason Andryuk <jason.andryuk@amd.com>,
Juergen Gross <jgross@suse.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
x86@kernel.org, xen-devel@lists.xenproject.org
Subject: [PATCH 2/5] x86/pvh: Use correct size value in GDT descriptor
Date: Thu, 26 Sep 2024 12:41:16 +0200 [thread overview]
Message-ID: <20240926104113.80146-9-ardb+git@google.com> (raw)
In-Reply-To: <20240926104113.80146-7-ardb+git@google.com>
From: Ard Biesheuvel <ardb@kernel.org>
The size field in a GDT descriptor is offset by 1, so subtract 1 from
the calculated range.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
arch/x86/platform/pvh/head.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S
index 98ddd552885a..f09e0fb832e4 100644
--- a/arch/x86/platform/pvh/head.S
+++ b/arch/x86/platform/pvh/head.S
@@ -223,7 +223,7 @@ SYM_CODE_END(pvh_start_xen)
.section ".init.data","aw"
.balign 8
SYM_DATA_START_LOCAL(gdt)
- .word gdt_end - gdt_start
+ .word gdt_end - gdt_start - 1
.long _pa(gdt_start) /* x86-64 will overwrite if relocated. */
.word 0
SYM_DATA_END(gdt)
--
2.46.0.792.g87dc391469-goog
next prev parent reply other threads:[~2024-09-26 10:42 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-26 10:41 [PATCH 0/5] x86/xen: Drop absolute references from startup code Ard Biesheuvel
2024-09-26 10:41 ` [PATCH 1/5] x86/pvh: Call C code via the kernel virtual mapping Ard Biesheuvel
2024-09-26 10:55 ` Ard Biesheuvel
2024-09-26 20:29 ` Jason Andryuk
2024-09-26 10:41 ` Ard Biesheuvel [this message]
2024-09-26 14:29 ` [PATCH 2/5] x86/pvh: Use correct size value in GDT descriptor Andrew Cooper
2024-09-26 20:32 ` Jason Andryuk
2024-09-26 10:41 ` [PATCH 3/5] x86/pvh: Omit needless clearing of phys_base Ard Biesheuvel
2024-09-26 20:35 ` Jason Andryuk
2024-09-26 10:41 ` [PATCH 4/5] x86/xen: Avoid relocatable quantities in Xen ELF notes Ard Biesheuvel
2024-09-27 1:46 ` Jason Andryuk
2024-09-27 5:49 ` Ard Biesheuvel
2024-09-27 7:21 ` Ard Biesheuvel
2024-09-26 10:41 ` [PATCH 5/5] x86/pvh: Avoid absolute symbol references in .head.text Ard Biesheuvel
2024-09-27 22:12 ` Jason Andryuk
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