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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-changelog] No direct entry to __enter_scheduler allowed. Must always pass through
ChangeSet 1.1367.1.1, 2005/03/25 13:46:20+00:00, kaf24@xxxxxxxxxxxxxxxxxxxx
No direct entry to __enter_scheduler allowed. Must always pass through
softirq handler. Also domain_crash() now returns and defers
descehduling from local CPU: old behaviour is still provided by
domain_crash_synchronous().
Signed-off-by: Keir Fraser <keir@xxxxxxxxxxxxx>
arch/ia64/domain.c | 5 +-
arch/x86/domain.c | 3 +
arch/x86/mm.c | 48 ++++------------------------
arch/x86/shadow.c | 16 +++++----
arch/x86/traps.c | 29 +----------------
arch/x86/vmx.c | 19 +++++------
arch/x86/vmx_intercept.c | 2 -
arch/x86/vmx_io.c | 6 +--
arch/x86/vmx_platform.c | 14 ++++----
arch/x86/x86_32/entry.S | 24 ++++++++------
arch/x86/x86_64/entry.S | 14 ++++----
common/domain.c | 28 ++++++++--------
common/schedule.c | 9 +----
drivers/char/console.c | 2 -
include/asm-x86/debugger.h | 76 +++++++++++----------------------------------
include/asm-x86/vmx_vmcs.h | 2 -
include/xen/sched.h | 15 +++++++-
17 files changed, 119 insertions(+), 193 deletions(-)
diff -Nru a/xen/arch/ia64/domain.c b/xen/arch/ia64/domain.c
--- a/xen/arch/ia64/domain.c 2005-03-25 09:03:41 -05:00
+++ b/xen/arch/ia64/domain.c 2005-03-25 09:03:41 -05:00
@@ -102,8 +102,9 @@
{
/* Just some sanity to ensure that the scheduler is set up okay. */
ASSERT(current->domain == IDLE_DOMAIN_ID);
- domain_unpause_by_systemcontroller(current);
- __enter_scheduler();
+ domain_unpause_by_systemcontroller(current);
+ raise_softirq(SCHEDULE_SOFTIRQ);
+ do_softirq();
/*
* Declares CPU setup done to the boot processor.
diff -Nru a/xen/arch/x86/domain.c b/xen/arch/x86/domain.c
--- a/xen/arch/x86/domain.c 2005-03-25 09:03:41 -05:00
+++ b/xen/arch/x86/domain.c 2005-03-25 09:03:41 -05:00
@@ -74,7 +74,8 @@
/* Just some sanity to ensure that the scheduler is set up okay. */
ASSERT(current->domain->id == IDLE_DOMAIN_ID);
domain_unpause_by_systemcontroller(current->domain);
- __enter_scheduler();
+ raise_softirq(SCHEDULE_SOFTIRQ);
+ do_softirq();
/*
* Declares CPU setup done to the boot processor.
diff -Nru a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
--- a/xen/arch/x86/mm.c 2005-03-25 09:03:41 -05:00
+++ b/xen/arch/x86/mm.c 2005-03-25 09:03:41 -05:00
@@ -1669,8 +1669,8 @@
if ( unlikely(shadow_mode_enabled(d)) )
check_pagetable(d, ed->arch.guest_table, "pre-mmu"); /* debug */
- if ( unlikely(shadow_mode_translate(d) ) )
- domain_crash();
+ if ( unlikely(shadow_mode_translate(d)) )
+ domain_crash_synchronous();
/*
* If we are resuming after preemption, read how much work we have already
@@ -2033,8 +2033,8 @@
if ( unlikely(!__addr_ok(va)) )
return -EINVAL;
- if ( unlikely(shadow_mode_translate(d) ) )
- domain_crash();
+ if ( unlikely(shadow_mode_translate(d)) )
+ domain_crash_synchronous();
LOCK_BIGLOCK(d);
@@ -2312,7 +2312,7 @@
MEM_LOG("ptwr: Could not read pte at %p\n", ptep);
/*
* Really a bug. We could read this PTE during the initial fault,
- * and pagetables can't have changed meantime. XXX Multi-CPU guests?
+ * and pagetables can't have changed meantime.
*/
BUG();
}
@@ -2339,7 +2339,7 @@
MEM_LOG("ptwr: Could not update pte at %p\n", ptep);
/*
* Really a bug. We could write this PTE during the initial fault,
- * and pagetables can't have changed meantime. XXX Multi-CPU guests?
+ * and pagetables can't have changed meantime.
*/
BUG();
}
@@ -2395,6 +2395,7 @@
unmap_domain_mem(pl1e);
ptwr_info[cpu].ptinfo[which].l1va = 0;
domain_crash();
+ return;
}
if ( unlikely(sl1e != NULL) )
@@ -2688,6 +2689,7 @@
unmap_domain_mem(ptwr_info[cpu].ptinfo[which].pl1e);
ptwr_info[cpu].ptinfo[which].l1va = 0;
domain_crash();
+ return 0;
}
return EXCRET_fault_fixed;
@@ -2724,40 +2726,6 @@
/************************************************************************/
#ifndef NDEBUG
-
-void ptwr_status(void)
-{
- unsigned long pte, *ptep, pfn;
- struct pfn_info *page;
- int cpu = smp_processor_id();
-
- ptep = (unsigned long *)&linear_pg_table
- [ptwr_info[cpu].ptinfo[PTWR_PT_INACTIVE].l1va>>PAGE_SHIFT];
-
- if ( __get_user(pte, ptep) ) {
- MEM_LOG("ptwr: Could not read pte at %p\n", ptep);
- domain_crash();
- }
-
- pfn = pte >> PAGE_SHIFT;
- page = &frame_table[pfn];
- printk("need to alloc l1 page %p\n", page);
- /* make pt page writable */
- printk("need to make read-only l1-page at %p is %p\n",
- ptep, pte);
-
- if ( ptwr_info[cpu].ptinfo[PTWR_PT_ACTIVE].l1va == 0 )
- return;
-
- if ( __get_user(pte, (unsigned long *)
- ptwr_info[cpu].ptinfo[PTWR_PT_ACTIVE].l1va) ) {
- MEM_LOG("ptwr: Could not read pte at %p\n", (unsigned long *)
- ptwr_info[cpu].ptinfo[PTWR_PT_ACTIVE].l1va);
- domain_crash();
- }
- pfn = pte >> PAGE_SHIFT;
- page = &frame_table[pfn];
-}
void audit_pagelist(struct domain *d)
{
diff -Nru a/xen/arch/x86/shadow.c b/xen/arch/x86/shadow.c
--- a/xen/arch/x86/shadow.c 2005-03-25 09:03:41 -05:00
+++ b/xen/arch/x86/shadow.c 2005-03-25 09:03:41 -05:00
@@ -655,15 +655,13 @@
&linear_pg_table[va >> PAGE_SHIFT])) )
{
SH_VVLOG("shadow_fault - EXIT: read gpte faulted2" );
- shadow_unlock(d);
- return 0;
+ goto fail;
}
if ( unlikely(!(gpte & _PAGE_PRESENT)) )
{
SH_VVLOG("shadow_fault - EXIT: gpte not present2 (%lx)",gpte );
- shadow_unlock(d);
- return 0;
+ goto fail;
}
/* Write fault? */
@@ -673,8 +671,7 @@
{
/* Write fault on a read-only mapping. */
SH_VVLOG("shadow_fault - EXIT: wr fault on RO page (%lx)", gpte);
- shadow_unlock(d);
- return 0;
+ goto fail;
}
l1pte_write_fault(d, &gpte, &spte);
@@ -691,7 +688,10 @@
/* XXX Watch out for read-only L2 entries! (not used in Linux). */
if ( unlikely(__put_user(gpte, (unsigned long *)
&linear_pg_table[va >> PAGE_SHIFT])) )
+ {
domain_crash();
+ goto fail;
+ }
/*
* Update of shadow PTE can fail because the L1 p.t. is not shadowed,
@@ -712,6 +712,10 @@
check_pagetable(d, ed->arch.guest_table, "post-sf");
return EXCRET_fault_fixed;
+
+ fail:
+ shadow_unlock(d);
+ return 0;
}
diff -Nru a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c 2005-03-25 09:03:42 -05:00
+++ b/xen/arch/x86/traps.c 2005-03-25 09:03:42 -05:00
@@ -223,18 +223,7 @@
show_registers(regs);
panic("CPU%d FATAL TRAP: vector = 3 (Int3)\n", smp_processor_id());
}
-#ifdef DOMU_DEBUG
- else if ( KERNEL_MODE(ed, regs) && ed->domain->id != 0 )
- {
- if ( !test_and_set_bit(EDF_CTRLPAUSE, &ed->ed_flags) ) {
- while (ed == current)
- __enter_scheduler();
- domain_pause_by_systemcontroller(ed->domain);
- }
-
- return 0;
- }
-#endif /* DOMU_DEBUG */
+
ti = current->arch.traps + 3;
tb->flags = TBF_EXCEPTION;
tb->cs = ti->cs;
@@ -950,8 +939,6 @@
struct exec_domain *ed = current;
struct trap_bounce *tb = &ed->arch.trap_bounce;
- DEBUGGER_trap_entry(TRAP_debug, regs);
-
__asm__ __volatile__("mov %%db6,%0" : "=r" (condition));
/* Mask out spurious debug traps due to lazy DR7 setting */
@@ -962,6 +949,8 @@
goto out;
}
+ DEBUGGER_trap_entry(TRAP_debug, regs);
+
if ( !GUEST_MODE(regs) )
{
/* Clear TF just for absolute sanity. */
@@ -974,19 +963,7 @@
*/
goto out;
}
-#ifdef DOMU_DEBUG
- else if ( KERNEL_MODE(ed, regs) && ed->domain->id != 0 )
- {
- regs->eflags &= ~EF_TF;
- if ( !test_and_set_bit(EDF_CTRLPAUSE, &ed->ed_flags) ) {
- while (ed == current)
- __enter_scheduler();
- domain_pause_by_systemcontroller(ed->domain);
- }
- goto out;
- }
-#endif /* DOMU_DEBUG */
/* Save debug status register where guest OS can peek at it */
ed->arch.debugreg[6] = condition;
diff -Nru a/xen/arch/x86/vmx.c b/xen/arch/x86/vmx.c
--- a/xen/arch/x86/vmx.c 2005-03-25 09:03:41 -05:00
+++ b/xen/arch/x86/vmx.c 2005-03-25 09:03:41 -05:00
@@ -22,6 +22,7 @@
#include <xen/lib.h>
#include <xen/trace.h>
#include <xen/sched.h>
+#include <xen/softirq.h>
-------------------------------------------------------
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