From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org
Cc: jgross@suse.com, Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: [PATCH 4/4] xen/PVH: Remove reserved entry in PVH GDT
Date: Mon, 30 Apr 2018 12:23:39 -0400 [thread overview]
Message-ID: <20180430162339.17143-5-boris.ostrovsky@oracle.com> (raw)
In-Reply-To: <20180430162339.17143-1-boris.ostrovsky@oracle.com>
And without it we can't use _BOOT_XX macros any longer so define new ones.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
---
arch/x86/xen/xen-pvh.S | 23 +++++++++++++----------
1 file changed, 13 insertions(+), 10 deletions(-)
diff --git a/arch/x86/xen/xen-pvh.S b/arch/x86/xen/xen-pvh.S
index 4eed586..30dd067 100644
--- a/arch/x86/xen/xen-pvh.S
+++ b/arch/x86/xen/xen-pvh.S
@@ -54,7 +54,11 @@
* charge of setting up it's own stack, GDT and IDT.
*/
-#define PVH_GDT_ENTRY_CANARY 4
+#define PVH_GDT_ENTRY_CS 1
+#define PVH_GDT_ENTRY_DS 2
+#define PVH_GDT_ENTRY_CANARY 3
+#define PVH_CS_SEL (PVH_GDT_ENTRY_CS * 8)
+#define PVH_DS_SEL (PVH_GDT_ENTRY_DS * 8)
#define PVH_CANARY_SEL (PVH_GDT_ENTRY_CANARY * 8)
ENTRY(pvh_start_xen)
@@ -62,7 +66,7 @@ ENTRY(pvh_start_xen)
lgdt (_pa(gdt))
- mov $(__BOOT_DS),%eax
+ mov $(PVH_DS_SEL),%eax
mov %eax,%ds
mov %eax,%es
mov %eax,%ss
@@ -99,7 +103,7 @@ ENTRY(pvh_start_xen)
mov %eax, %cr0
/* Jump to 64-bit mode. */
- ljmp $__BOOT_CS, $_pa(1f)
+ ljmp $PVH_CS_SEL, $_pa(1f)
/* 64-bit entry point. */
.code64
@@ -122,13 +126,13 @@ ENTRY(pvh_start_xen)
or $(X86_CR0_PG | X86_CR0_PE), %eax
mov %eax, %cr0
- ljmp $__BOOT_CS, $1f
+ ljmp $PVH_CS_SEL, $1f
1:
call xen_prepare_pvh
mov $_pa(pvh_bootparams), %esi
/* startup_32 doesn't expect paging and PAE to be on. */
- ljmp $__BOOT_CS, $_pa(2f)
+ ljmp $PVH_CS_SEL, $_pa(2f)
2:
mov %cr0, %eax
and $~X86_CR0_PG, %eax
@@ -137,7 +141,7 @@ ENTRY(pvh_start_xen)
and $~X86_CR4_PAE, %eax
mov %eax, %cr4
- ljmp $__BOOT_CS, $_pa(startup_32)
+ ljmp $PVH_CS_SEL, $_pa(startup_32)
#endif
END(pvh_start_xen)
@@ -149,13 +153,12 @@ gdt:
.word 0
gdt_start:
.quad 0x0000000000000000 /* NULL descriptor */
- .quad 0x0000000000000000 /* reserved */
#ifdef CONFIG_X86_64
- .quad 0x00af9a000000ffff /* __BOOT_CS */
+ .quad 0x00af9a000000ffff /* PVH_CS_SEL */
#else
- .quad 0x00cf9a000000ffff /* __BOOT_CS */
+ .quad 0x00cf9a000000ffff /* PVH_CS_SEL */
#endif
- .quad 0x00cf92000000ffff /* __BOOT_DS */
+ .quad 0x00cf92000000ffff /* PVH_DS_SEL */
.quad 0x0040900000000018 /* PVH_CANARY_SEL */
gdt_end:
--
2.9.3
next prev parent reply other threads:[~2018-04-30 16:21 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-30 16:23 [PATCH 0/4] PVH GDT fixes and cleanup Boris Ostrovsky
2018-04-30 16:23 ` [PATCH 1/4] xen/PVH: Replace GDT_ENTRY with explicit constant Boris Ostrovsky
2018-04-30 16:57 ` [Xen-devel] " Roger Pau Monné
2018-04-30 18:07 ` Boris Ostrovsky
2018-05-01 7:53 ` Roger Pau Monné
2018-05-01 12:16 ` Boris Ostrovsky
2018-05-01 11:31 ` David Laight
2018-05-01 12:40 ` Boris Ostrovsky
2018-05-02 8:00 ` [Xen-devel] " Jan Beulich
2018-05-02 14:53 ` Boris Ostrovsky
2018-04-30 16:23 ` [PATCH 2/4] xen/PVH: Use proper CS selector in long mode Boris Ostrovsky
2018-05-02 8:05 ` [Xen-devel] " Jan Beulich
2018-05-02 14:57 ` Boris Ostrovsky
2018-05-02 15:00 ` Jan Beulich
2018-05-02 15:08 ` Boris Ostrovsky
2018-05-02 15:09 ` Jan Beulich
2018-05-02 15:28 ` Andrew Cooper
2018-04-30 16:23 ` [PATCH 3/4] xen/PVH: Set up GS segment for stack canary Boris Ostrovsky
2018-05-02 8:16 ` [Xen-devel] " Jan Beulich
2018-05-02 15:00 ` Boris Ostrovsky
2018-05-02 15:01 ` Jan Beulich
2018-05-02 15:22 ` Boris Ostrovsky
2018-05-02 15:41 ` Jan Beulich
2018-05-02 17:29 ` Boris Ostrovsky
2018-05-03 7:35 ` Jan Beulich
2018-04-30 16:23 ` Boris Ostrovsky [this message]
2018-05-01 8:00 ` [Xen-devel] [PATCH 4/4] xen/PVH: Remove reserved entry in PVH GDT Roger Pau Monné
2018-05-01 12:34 ` Boris Ostrovsky
2018-05-02 8:26 ` Jan Beulich
2018-05-02 15:06 ` Boris Ostrovsky
2018-05-02 15:07 ` Jan Beulich
2018-05-02 8:19 ` Jan Beulich
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