diff options
Diffstat (limited to 'arch/i386/kernel')
| -rw-r--r-- | arch/i386/kernel/asm-offsets.c | 1 | ||||
| -rw-r--r-- | arch/i386/kernel/entry.S | 16 |
2 files changed, 16 insertions, 1 deletions
diff --git a/arch/i386/kernel/asm-offsets.c b/arch/i386/kernel/asm-offsets.c index a7c2947b396..25f7eb51392 100644 --- a/arch/i386/kernel/asm-offsets.c +++ b/arch/i386/kernel/asm-offsets.c @@ -61,6 +61,7 @@ void foo(void) OFFSET(TI_addr_limit, thread_info, addr_limit); OFFSET(TI_restart_block, thread_info, restart_block); OFFSET(TI_sysenter_return, thread_info, sysenter_return); + OFFSET(TI_cpu, thread_info, cpu); BLANK(); OFFSET(GDS_size, Xgt_desc_struct, size); diff --git a/arch/i386/kernel/entry.S b/arch/i386/kernel/entry.S index ffb23654427..32980b83493 100644 --- a/arch/i386/kernel/entry.S +++ b/arch/i386/kernel/entry.S @@ -1030,7 +1030,21 @@ ENTRY(xen_hypervisor_callback) CFI_ADJUST_CFA_OFFSET 4 SAVE_ALL TRACE_IRQS_OFF - mov %esp, %eax + + /* Check to see if we got the event in the critical + region in xen_iret_direct, after we've reenabled + events and checked for pending events. This simulates + iret instruction's behaviour where it delivers a + pending interrupt when enabling interrupts. */ + movl PT_EIP(%esp),%eax + cmpl $xen_iret_start_crit,%eax + jb 1f + cmpl $xen_iret_end_crit,%eax + jae 1f + + call xen_iret_crit_fixup + +1: mov %esp, %eax call xen_evtchn_do_upcall jmp ret_from_intr CFI_ENDPROC |