ested-by: Andy Lutomirski
Signed-off-by: Juergen Gross
---
arch/x86/include/asm/irqflags.h | 20 ++-
arch/x86/include/asm/paravirt.h | 5 -
arch/x86/include/asm/paravirt_types.h | 7 ++-
arch/x86/kernel/irqflags.S| 11 ---
arch/x86/kernel/p
Xen PV guests don't use IST. For double fault interrupts switch to
the same model as NMI.
Correct a typo in a comment while copying it.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Thomas Gleixner
---
V2:
- fix typo (Andy Lutomirski)
---
arch/x86/includ
atch 1 for making usage of static_call easier
- even more cleanup
Changes in V3:
- added patches 7 and 12
- addressed all comments
Changes in V2:
- added patches 5-12
Juergen Gross (14):
x86/xen: use specific Xen pv interrupt entry for MCE
x86/xen: use specific Xen pv interrupt entry for D
Xen PV guests don't use IST. For machine check interrupts switch to
the same model as debug interrupts.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Thomas Gleixner
---
arch/x86/include/asm/idtentry.h | 3 +++
arch/x86/xen/enlighten_pv.c
: Peter Zijlstra (Intel)
Cc: Thomas Gleixner
Cc: Mel Gorman
Cc: Ingo Molnar
Cc: Michal Hocko
Cc: Paul E. McKenney
Signed-off-by: Juergen Gross
---
include/linux/static_call.h | 20 --
include/linux/static_call_types.h | 27 +
tools
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc5-tag
xen: branch for v5.11-rc5
It contains a fix for build failure showing up in some configurations.
Thanks.
Juergen
arch/x86/xen/smp_hvm.c | 2 ++
1 file changed, 2 ins
are never executed in a Xen PV guest. Replace those with the
plain swapgs instruction. For SWAPGS_UNSAFE_STACK the same applies.
Signed-off-by: Juergen Gross
Acked-by: Andy Lutomirski
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Borislav Petkov
Reviewed-by: Thomas Gleixner
---
arch/x86/entry
instr", FEATURE_NR,
"feature_on_instr", "feature_off_instr"
which will start with "default_instr" and at patch time will, depending
on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_ins
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross
---
V4:
- drop
There is no need any longer to have different paravirt patch functions
for native and Xen. Eliminate native_patch() and rename
paravirt_patch_default() to paravirt_patch().
Signed-off-by: Juergen Gross
---
V3:
- remove paravirt_patch_insns() (kernel test robot)
---
arch/x86/include/asm
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross
---
V4:
- drop
register defines for assembler paravirt calling, as there
isn't much usage left.
Signed-off-by: Juergen Gross
---
V4:
- fixed SAVE_FLAGS() (kernel test robot)
- added assembler paravirt cleanup
---
arch/x86/entry/entry_64.S | 2 +-
arch/x86/include/asm/irqflags.h | 2 +-
arc
code only, so it can just be
replaced by cli.
INTERRUPT_RETURN in 32-bit code can be replaced by iret.
ENABLE_INTERRUPTS is used nowhere, so it can be removed.
Signed-off-by: Juergen Gross
---
arch/x86/entry/entry_32.S | 4 +-
arch/x86/include/asm/irqflags.h | 5 --
arch/x
Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.
Signed-off-by: Juergen Gross
---
V3:
- drop PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49 ++-
1 file
)PVOP_CALL(long, ...).
Note that it isn't easily possible to just redefine PVOP_VCALL()
to use PVOP_CALL() instead, as this would require further hiding of
commas in macro parameters.
Signed-off-by: Juergen Gross
---
V3:
- new patch
V4:
- fix build warnings with clang (kernel test
instr", FEATURE_NR,
"feature_on_instr", "feature_off_instr"
which will start with "default_instr" and at patch time will, depending
on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_ins
patching later.
Make sure paravirt patching is performed before alternative patching.
Signed-off-by: Juergen Gross
---
V3:
- add comment (Boris Petkov)
- no negative features (Boris Petkov)
V4:
- move paravirt_set_cap() to paravirt-spinlocks.c
---
arch/x86/include/asm/cpufeatures.h | 2
The iret paravirt op is rather special as it is using a jmp instead
of a call instruction. Switch it to ALTERNATIVE.
Signed-off-by: Juergen Gross
---
V3:
- use ALTERNATIVE_TERNARY
---
arch/x86/include/asm/paravirt.h | 6 +++---
arch/x86/include/asm/paravirt_types.h | 5 +
arch/x86
ested-by: Andy Lutomirski
Signed-off-by: Juergen Gross
---
arch/x86/include/asm/irqflags.h | 20 ++-
arch/x86/include/asm/paravirt.h | 5 -
arch/x86/include/asm/paravirt_types.h | 7 ++-
arch/x86/kernel/irqflags.S| 11 ---
arch/x86/kernel/p
are never executed in a Xen PV guest. Replace those with the
plain swapgs instruction. For SWAPGS_UNSAFE_STACK the same applies.
Signed-off-by: Juergen Gross
Acked-by: Andy Lutomirski
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Borislav Petkov
Reviewed-by: Thomas Gleixner
---
arch/x86/entry
in the kernel more than compensate for
this drop (a kernel build in a Xen PV guest was slightly faster with
this patch applied).
While at it remove the stale sysret32 remnants.
Signed-off-by: Juergen Gross
---
V3:
- simplify ALTERNATIVE (Boris Petkov)
---
arch/x86/entry/entry_64.S
Xen PV guests don't use IST. For machine check interrupts switch to
the same model as debug interrupts.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Thomas Gleixner
---
arch/x86/include/asm/idtentry.h | 3 +++
arch/x86/xen/enlighten_pv.c
tch, as objtool patches are in tip now
- added patch 1 for making usage of static_call easier
- even more cleanup
Changes in V3:
- added patches 7 and 12
- addressed all comments
Changes in V2:
- added patches 5-12
Juergen Gross (14):
x86/xen: use specific Xen pv interrupt entry for MCE
x86/xen: u
Xen PV guests don't use IST. For double fault interrupts switch to
the same model as NMI.
Correct a typo in a comment while copying it.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
Reviewed-by: Thomas Gleixner
---
V2:
- fix typo (Andy Lutomirski)
---
arch/x86/includ
: Peter Zijlstra (Intel)
Cc: Thomas Gleixner
Cc: Mel Gorman
Cc: Ingo Molnar
Cc: Michal Hocko
Cc: Paul E. McKenney
Signed-off-by: Juergen Gross
---
include/linux/static_call.h | 20 --
include/linux/static_call_types.h | 27 +
tools
Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.
Signed-off-by: Juergen Gross
---
V3:
- drop PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49 ++-
1 file
patching later.
Make sure paravirt patching is performed before alternative patching.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- add comment (Boris Petkov)
- no negative features (Boris Petkov)
V4:
- move paravirt_set_cap() to paravirt-spinlocks.c
---
arch/x86
ff-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V5:
- new patch
---
include/linux/static_call.h | 18 --
include/linux/static_call_types.h | 18 ++
tools/include/linux/static_call_types.h | 18 ++
3 files changed, 36 inser
_static_cpu_has() contains a completely open coded version of
ALTERNATIVE_TERNARY(). Replace that with the macro instead.
Signed-off-by: Juergen Gross
---
V6:
- new patch
V7:
- moved patch earlier in series (Boris Petkov)
---
arch/x86/include/asm/cpufeature.h | 41
().
Signed-off-by: Juergen Gross
---
V7:
- new patch
---
include/linux/static_call.h | 8
1 file changed, 8 insertions(+)
diff --git a/include/linux/static_call.h b/include/linux/static_call.h
index 76b881259144..e01b61ab86b1 100644
--- a/include/linux/static_call.h
+++ b/include/linux
register defines for assembler paravirt calling, as there
isn't much usage left.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V4:
- fixed SAVE_FLAGS() (kernel test robot)
- added assembler paravirt cleanup
---
arch/x86/entry/entry_64.S | 2 +-
arch/x86/includ
)PVOP_CALL(long, ...).
Note that it isn't easily possible to just redefine PVOP_VCALL()
to use PVOP_CALL() instead, as this would require further hiding of
commas in macro parameters.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- new patch
V4:
- fix build warnings
code only, so it can just be
replaced by cli.
INTERRUPT_RETURN in 32-bit code can be replaced by iret.
ENABLE_INTERRUPTS is used nowhere, so it can be removed.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
arch/x86/entry/entry_32.S | 4 +-
arch/x86/include/a
Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- drop PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49
The iret paravirt op is rather special as it is using a jmp instead
of a call instruction. Switch it to ALTERNATIVE.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- use ALTERNATIVE_TERNARY
---
arch/x86/include/asm/paravirt.h | 6 +++---
arch/x86/include/asm
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross
Acked-by: Peter
There is no need any longer to have different paravirt patch functions
for native and Xen. Eliminate native_patch() and rename
paravirt_patch_default() to paravirt_patch().
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- remove paravirt_patch_insns() (kernel test robot
ot;default_instr" and at patch time will, depending
on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_instr".
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- new patch
V4:
- use X86_FEATURE_ALWAYS instead
Add support for alternative patching for the case a feature is not
present on the current cpu.
For users of ALTERNATIVE() and friends an inverted feature is specified
by applying the ALT_NOT() macro to it, e.g.:
ALTERNATIVE(old, new, ALT_NOT(feature))
Signed-off-by: Juergen Gross
---
V5
Merge arch/x86/include/asm/alternative-asm.h into
arch/x86/include/asm/alternative.h in order to make it easier to use
common definitions later.
Signed-off-by: Juergen Gross
---
V6:
- new patch
V7:
- moved to begin of series (Boris Petkov)
---
arch/x86/entry/entry_32.S| 2
e of static_call easier
- even more cleanup
Changes in V3:
- added patches 7 and 12
- addressed all comments
Changes in V2:
- added patches 5-12
Juergen Gross (14):
x86/alternative: merge include files
static_call: move struct static_call_key definition to
static_call_types.h
static_call:
The warnings for flushing a logically offline cpu's call_single_queue
are gated by a wrong if statement. It should trigger when there have
been new requests before dequeueing them, not afterwards.
Signed-off-by: Juergen Gross
---
V3:
- new patch
---
kernel/smp.c | 2 +-
1 file chang
boot parameter for switching
the debug functionality on. This will reduce any performance impact
of the debug coding to a bare minimum when not being used.
Signed-off-by: Juergen Gross
---
.../admin-guide/kernel-parameters.txt | 6 +++
kernel/smp.c | 38
In order to be able to easily add more CSD lock debugging data to
struct call_function_data->csd move the call_single_data_t element
into a sub-structure.
Signed-off-by: Juergen Gross
---
kernel/smp.c | 16 ++--
1 file changed, 10 insertions(+), 6 deletions(-)
diff --git a/ker
, but this option will have a larger impact on performance.
I hope that the "ext" setting will help to find the root cause of the
problem.
Juergen Gross (4):
kernel/smp: add boot parameter for controlling CSD lock debugging
kernel/smp: prepare more CSD lock debugging
kernel/smp: add
nts for the source cpu
of the hanging request, and receiver side events for the target cpu),
and the related events just before those (for adding data needed to
identify a possible race). Printing all available data would be
possible, but this would add large amounts of data printed on larger
Those are fixes for XSA-332.
The rest of the V3 patches have been applied already. There is one
additional fix in patch 2 which addresses network outages when a guest
is doing reboot loops.
Juergen Gross (3):
xen/events: reset affinity of 2-level event when tearing it down
xen/events: don&#
/unmasking and temporary masking. The event channel should only
be able to generate an interrupt if all flags are cleared.
Cc: sta...@vger.kernel.org
Fixes: 54c9de89895e0a36047 ("xen/events: add a new late EOI evtchn framework")
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
Revie
: Julien Grall
Signed-off-by: Juergen Gross
Reviewed-by: Julien Grall
---
V2:
- reset affinity when tearing down the event (Julien Grall)
---
drivers/xen/events/events_2l.c | 15 +++
drivers/xen/events/events_base.c | 1 +
drivers/xen/events/events_internal.h | 8
3
t set.
Cc: sta...@vger.kernel.org
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
Reviewed-by: Julien Grall
---
V2:
- new patch
V3:
- use common helper for end of handler action (Julien Grall)
- move setting is_active to 0 for lateeoi (Boris Ostrovsky)
---
drivers/xen/events/eve
ff-by: Juergen Gross
---
V5:
- new patch
---
include/linux/static_call.h | 18 --
include/linux/static_call_types.h | 18 ++
tools/include/linux/static_call_types.h | 18 ++
3 files changed, 36 insertions(+), 18 deletions(-)
diff --
The macro ALTINSTR_REPLACEMENT() doesn't make use of the feature
parameter, so drop it.
Signed-off-by: Juergen Gross
---
V5:
- new patch
---
arch/x86/include/asm/alternative.h | 14 +++---
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/x86/include/asm/alternat
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross
---
V4:
- drop
it, e.g.:
ALTERNATIVE(old, new, ~feature)
This requires adapting the objtool information for struct alt_instr.
Signed-off-by: Juergen Gross
---
V5:
- split off from next patch
- reworked to use flag byte (Boris Petkov)
---
arch/x86/include/asm/alternative-asm.h| 6 ++
arch/x86
king usage of static_call easier
- even more cleanup
Changes in V3:
- added patches 7 and 12
- addressed all comments
Changes in V2:
- added patches 5-12
Juergen Gross (12):
staticcall: move struct static_call_key definition to
static_call_types.h
x86/paravirt: switch time pvops functi
code only, so it can just be
replaced by cli.
INTERRUPT_RETURN in 32-bit code can be replaced by iret.
ENABLE_INTERRUPTS is used nowhere, so it can be removed.
Signed-off-by: Juergen Gross
---
arch/x86/entry/entry_32.S | 4 +-
arch/x86/include/asm/irqflags.h | 5 --
arch/x
The iret paravirt op is rather special as it is using a jmp instead
of a call instruction. Switch it to ALTERNATIVE.
Signed-off-by: Juergen Gross
---
V3:
- use ALTERNATIVE_TERNARY
---
arch/x86/include/asm/paravirt.h | 6 +++---
arch/x86/include/asm/paravirt_types.h | 5 +
arch/x86
Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.
Signed-off-by: Juergen Gross
---
V3:
- drop PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49 ++-
1 file
There is no need any longer to have different paravirt patch functions
for native and Xen. Eliminate native_patch() and rename
paravirt_patch_default() to paravirt_patch().
Signed-off-by: Juergen Gross
---
V3:
- remove paravirt_patch_insns() (kernel test robot)
---
arch/x86/include/asm
ot;default_instr" and at patch time will, depending
on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_instr".
Signed-off-by: Juergen Gross
---
V3:
- new patch
V4:
- use X86_FEATURE_ALWAYS instead of negated feature (Boris Petkov)
- un
register defines for assembler paravirt calling, as there
isn't much usage left.
Signed-off-by: Juergen Gross
---
V4:
- fixed SAVE_FLAGS() (kernel test robot)
- added assembler paravirt cleanup
---
arch/x86/entry/entry_64.S | 2 +-
arch/x86/include/asm/irqflags.h | 2 +-
arc
)PVOP_CALL(long, ...).
Note that it isn't easily possible to just redefine PVOP_VCALL()
to use PVOP_CALL() instead, as this would require further hiding of
commas in macro parameters.
Signed-off-by: Juergen Gross
---
V3:
- new patch
V4:
- fix build warnings with clang (kernel test
patching later.
Make sure paravirt patching is performed before alternative patching.
Signed-off-by: Juergen Gross
---
V3:
- add comment (Boris Petkov)
- no negative features (Boris Petkov)
V4:
- move paravirt_set_cap() to paravirt-spinlocks.c
---
arch/x86/include/asm/cpufeatures.h | 2
ff-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V5:
- new patch
---
include/linux/static_call.h | 18 --
include/linux/static_call_types.h | 18 ++
tools/include/linux/static_call_types.h | 18 ++
3 files changed, 36 inser
The macro ALTINSTR_REPLACEMENT() doesn't make use of the feature
parameter, so drop it.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V5:
- new patch
---
arch/x86/include/asm/alternative.h | 14 +++---
1 file changed, 7 insertions(+), 7 deletions(-)
diff --
Add support for alternative patching for the case a feature is not
present on the current cpu.
For users of ALTERNATIVE() and friends an inverted feature is specified
by applying the ALT_NOT() macro to it, e.g.:
ALTERNATIVE(old, new, ALT_NOT(feature))
Signed-off-by: Juergen Gross
---
V5
The time pvops functions are the only ones left which might be
used in 32-bit mode and which return a 64-bit value.
Switch them to use the static_call() mechanism instead of pvops, as
this allows quite some simplification of the pvops implementation.
Signed-off-by: Juergen Gross
Acked-by: Peter
ot;default_instr" and at patch time will, depending
on FEATURE_NR being set or not, patch that with either
"feature_on_instr" or "feature_off_instr".
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- new patch
V4:
- use X86_FEATURE_ALWAYS instead
code only, so it can just be
replaced by cli.
INTERRUPT_RETURN in 32-bit code can be replaced by iret.
ENABLE_INTERRUPTS is used nowhere, so it can be removed.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
arch/x86/entry/entry_32.S | 4 +-
arch/x86/include/a
"
Changes in V4:
- fixed several build failures
- removed objtool patch, as objtool patches are in tip now
- added patch 1 for making usage of static_call easier
- even more cleanup
Changes in V3:
- added patches 7 and 12
- addressed all comments
Changes in V2:
- added patches 5-12
Juergen G
The iret paravirt op is rather special as it is using a jmp instead
of a call instruction. Switch it to ALTERNATIVE.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- use ALTERNATIVE_TERNARY
---
arch/x86/include/asm/paravirt.h | 6 +++---
arch/x86/include/asm
register defines for assembler paravirt calling, as there
isn't much usage left.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V4:
- fixed SAVE_FLAGS() (kernel test robot)
- added assembler paravirt cleanup
---
arch/x86/entry/entry_64.S | 2 +-
arch/x86/includ
Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- drop PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49
)PVOP_CALL(long, ...).
Note that it isn't easily possible to just redefine PVOP_VCALL()
to use PVOP_CALL() instead, as this would require further hiding of
commas in macro parameters.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- new patch
V4:
- fix build warnings
patching later.
Make sure paravirt patching is performed before alternative patching.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- add comment (Boris Petkov)
- no negative features (Boris Petkov)
V4:
- move paravirt_set_cap() to paravirt-spinlocks.c
---
arch/x86
There is no need any longer to have different paravirt patch functions
for native and Xen. Eliminate native_patch() and rename
paravirt_patch_default() to paravirt_patch().
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
V3:
- remove paravirt_patch_insns() (kernel test robot
Merge arch/x86/include/asm/alternative-asm.h into
arch/x86/include/asm/alternative.h in order to make it easier to use
common definitions later.
Signed-off-by: Juergen Gross
---
arch/x86/entry/entry_32.S| 2 +-
arch/x86/entry/vdso/vdso32/system_call.S | 2 +-
arch/x86
_static_cpu_has() contains a completely open coded version of
ALTERNATIVE_TERNARY(). Replace that with the macro instead.
Signed-off-by: Juergen Gross
---
arch/x86/include/asm/cpufeature.h | 41 +++
1 file changed, 9 insertions(+), 32 deletions(-)
diff --git a/arch
kernel.org
Signed-off-by: Juergen Gross
---
drivers/xen/events/events_base.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index 6a836d131e73..7b26ef817f8b 100644
--- a/drivers/xen/events/events_base.c
+++ b/drivers/
control.
Patches 6 and 7 are minor fixes I had lying around.
Juergen Gross (7):
xen/events: reset affinity of 2-level event initially
xen/events: don't unmask an event channel when an eoi is pending
xen/events: fix lateeoi irq acknowledgement
xen/events: link interdomain events to assoc
/unmasking. The event channel should only be able to generate
an interrupt if both flags are cleared.
Cc: sta...@vger.kernel.org
Fixes: 54c9de89895e0a36047 ("xen/events: add a new late EOI evtchn framework")
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
---
drivers/xen/event
percpu events get
initialized before the percpu event channel hook is called,
resetting of the affinities happens after offlining a vcpu (this is
working, as initial percpu memory is zeroed out).
Cc: sta...@vger.kernel.org
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
---
drivers/xen
The ring buffer for user events is used in the local system only, so
smp barriers are fine for ensuring consistency.
Reported-by: Andrew Cooper
Signed-off-by: Juergen Gross
---
drivers/xen/evtchn.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/xen/evtchn.c b
In evtchn_read() use READ_ONCE() for reading the producer index in
order to avoid the compiler generating multiple accesses.
Signed-off-by: Juergen Gross
---
drivers/xen/evtchn.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/xen/evtchn.c b/drivers/xen/evtchn.c
Add sysfs nodes for each xenbus device showing event statistics (number
of events and spurious events, number of associated event channels)
and for setting a spurious event threshold in case a frontend is
sending too many events without being rogue on purpose.
Signed-off-by: Juergen Gross
id of the other side.
While at it remove the stale prototype of bind_evtchn_to_irq_lateeoi().
Signed-off-by: Juergen Gross
---
drivers/block/xen-blkback/xenbus.c | 2 +-
drivers/net/xen-netback/interface.c | 16 +--
drivers/xen/events/events_base.c| 41
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc4-tag
xen: branch for v5.11-rc4
It contains:
- A series for fixing a regression when running as a fully virtualized
guest on an old Xen hypervisor not supporting PV interrup
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc4-tag
xen: branch for v5.11-rc4
It contains:
- A series for fixing a regression when running as a fully virtualized
guest on an old Xen hypervisor not supporting PV interrup
Runtime #VC Exception Handler")
Cc: # v5.10
Signed-off-by: Juergen Gross
---
arch/x86/include/asm/idtentry.h | 3 +++
arch/x86/xen/enlighten_pv.c | 11 +++
arch/x86/xen/xen-asm.S | 3 +++
3 files changed, 17 insertions(+)
diff --git a/arch/x86/include/asm/idtentry.h b/
andler, which will just
panic the system in case such a trap will ever happen.
Fixes: 0786138c78e793 ("x86/sev-es: Add a Runtime #VC Exception Handler")
Cc: # v5.10
Signed-off-by: Juergen Gross
---
V2:
- use generic handler for unknown traps (Andrew Cooper)
---
arch/x86/include/asm
+++
5 files changed, 54 insertions(+), 14 deletions(-)
David Woodhouse (1):
xen: Fix XenStore initialisation for XS_LOCAL
Juergen Gross (1):
x86/xen: avoid warning in Xen pv guest with CONFIG_AMD_MEM_ENCRYPT enabled
Roger Pau Monne (1):
xen-blkfront: allow discard-* nodes to be
In case a process waits for any Xenstore action in the xenbus driver
it should be interruptible by signals.
Signed-off-by: Juergen Gross
---
V2:
- don't special case SIGKILL as libxenstore is handling -EINTR fine
---
drivers/xen/xenbus/xenbus_xs.c | 9 -
1 file changed, 8 inser
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc1-tag
xen: branch for v5.11-rc1
It contains fixes for security issues just having been disclosed:
- a 5 patch series for fixing of XSA-349 (DoS via resource depletion in
Xen
During test of Xen pvSCSI frontend module I found the following issue:
When unplugging a passed-through SCSI-device the SCSI Host is removed.
When calling the final scsi_host_put() from the driver an Oops is
happening:
[ 219.816292] (file=drivers/scsi/xen-scsifront.c, line=808)
scsifront_remov
On 08/01/2014 07:41 AM, Juergen Gross wrote:
During test of Xen pvSCSI frontend module I found the following issue:
When unplugging a passed-through SCSI-device the SCSI Host is removed.
When calling the final scsi_host_put() from the driver an Oops is
happening:
[ 219.816292] (file=drivers
On 08/01/2014 09:05 AM, James Bottomley wrote:
On Fri, 2014-08-01 at 08:02 +0200, Juergen Gross wrote:
On 08/01/2014 07:41 AM, Juergen Gross wrote:
During test of Xen pvSCSI frontend module I found the following issue:
When unplugging a passed-through SCSI-device the SCSI Host is removed
On 09/17/2014 03:45 PM, David Vrabel wrote:
On 17/09/14 05:12, Juergen Gross wrote:
Size restrictions native kernels wouldn't have resulted from the initrd
getting mapped into the initial mapping. The kernel doesn't really need
the initrd to be mapped, so use infrastructure available
On 09/17/2014 04:07 PM, David Vrabel wrote:
On 17/09/14 05:12, Juergen Gross wrote:
Direct Xen to place the initial P->M table outside of the initial
mapping, as otherwise the 1G (implementation) / 2G (theoretical)
restriction on the size of the initial mapping limits the amount
of memor
On 09/17/2014 04:42 PM, David Vrabel wrote:
On 17/09/14 15:20, Juergen Gross wrote:
On 09/17/2014 04:07 PM, David Vrabel wrote:
Are you missing a ClearPagePinned(..) here?
Probably, yes.
Jan pointed out that this is not needed.
@@ -1529,6 +1604,22 @@ static pte_t __init mask_rw_pte
On 09/17/2014 04:43 PM, David Vrabel wrote:
On 17/09/14 05:12, Juergen Gross wrote:
When a Xen pv-domain is booted the initial memory map contains multiple
objects in the top 2 GB including the initrd and the p2m list. This
limits the supported maximum size of the initrd and the maximum
memory
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