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Re: [Xen-devel] [PATCH v2] xen/pv: Fix a boot up hang revealed by int3 self test
- To: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
- From: Zhenzhong Duan <zhenzhong.duan@xxxxxxxxxx>
- Date: Fri, 12 Jul 2019 21:27:51 +0800
- Cc: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, x86@xxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, srinivas.eeda@xxxxxxxxxx, Ingo Molnar <mingo@xxxxxxxxxx>, Borislav Petkov <bp@xxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>
- Delivery-date: Fri, 12 Jul 2019 13:30:25 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 2019/7/12 21:09, Peter Zijlstra wrote:
On Fri, Jul 12, 2019 at 09:04:22PM +0800, Zhenzhong Duan wrote:
On 2019/7/12 20:06, Peter Zijlstra wrote:
On Thu, Jul 11, 2019 at 04:15:21PM +0800, Zhenzhong Duan wrote:
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 4722ba2..2138d69 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -596,7 +596,7 @@ struct trap_array_entry {
static struct trap_array_entry trap_array[] = {
{ debug, xen_xendebug, true },
- { int3, xen_xenint3, true },
+ { int3, xen_int3, true },
{ double_fault, xen_double_fault, true },
#ifdef CONFIG_X86_MCE
{ machine_check, xen_machine_check, true },
I'm confused on the purpose of trap_array[], could you elucidate me?
Used to replace trap handler addresses by Xen specific ones and sanity check
if there's an unexpected IST-using fault handler.
git grep xen_int3, failed me. Where does that symbol come from?
Generated by "xen_pv_trap int3" in arch/x86/xen/xen-asm_64.S
Zhenzhong
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