The following commit has been merged into the locking/core branch of tip:
Commit-ID: 6bf3195fdbab92b57f3167101a0b651b93dbeae7
Gitweb:
https://git.kernel.org/tip/6bf3195fdbab92b57f3167101a0b651b93dbeae7
Author:Juergen Gross
AuthorDate:Mon, 01 Mar 2021 11:13:36 +01:00
The following commit has been merged into the locking/core branch of tip:
Commit-ID: b3e3bc34b1e938c6447fa8b646010c4016be7fad
Gitweb:
https://git.kernel.org/tip/b3e3bc34b1e938c6447fa8b646010c4016be7fad
Author:Juergen Gross
AuthorDate:Mon, 01 Mar 2021 11:13:35 +01:00
s 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
configurations.
Signed-off-by: Juergen Gross
Tested-by: Paul E. McKenney
---
V2:
- add automatic data deciphering a
a 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 (3):
kernel/smp: add boot parameter for controlling CSD lock debugging
kernel/smp: prepare more CSD lock debugging
kernel/smp: add
(+), 16 deletions(-)
Jan Beulich (1):
xen-front-pgdir-shbuf: don't record wrong grant handle upon error
Juergen Gross (3):
xen/events: add per-xenbus device event statistics and settings
xen/evtchn: use smp barriers for user event ring
xen/evtchn: use READ/WRITE_ONCE
a 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
hen a hang is detected.
Signed-off-by: Juergen Gross
---
.../admin-guide/kernel-parameters.txt | 4 +
kernel/smp.c | 143 +-
2 files changed, 144 insertions(+), 3 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt
b/Doc
, 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 (3):
kernel/smp: add boot parameter for controlling CSD lock debugging
kernel/smp: prepare more CSD lock debugging
kernel/smp: add
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
For avoiding read- and write-tearing by the compiler use READ_ONCE()
and WRITE_ONCE() for accessing the ring indices in evtchn.c.
Signed-off-by: Juergen Gross
---
V2:
- modify all accesses (Julien Grall)
V3:
- fix incrementing producer index (Ross Lagerwall)
---
drivers/xen/evtchn.c | 25
id of the other side.
While at it remove the stale prototype of bind_evtchn_to_irq_lateeoi().
Signed-off-by: Juergen Gross
Reviewed-by: Boris Ostrovsky
Reviewed-by: Wei Liu
Reviewed-by: Paul Durrant
---
drivers/block/xen-blkback/xenbus.c | 2 +-
drivers/net/xen-netback/interface.c | 16
The ring buffer for user events is local to the given kernel instance,
so smp barriers are fine for ensuring consistency.
Reported-by: Andrew Cooper
Signed-off-by: Juergen Gross
Reviewed-by: Jan Beulich
---
drivers/xen/evtchn.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff
Add syfs 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
/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
.
Cc: sta...@vger.kernel.org
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
---
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/events_base.c | 32 +
-by: 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
control.
Patches 7 and 8 are minor fixes I had lying around.
Juergen Gross (8):
xen/events: reset affinity of 2-level event when tearing it down
xen/events: don't unmask an event channel when an eoi is pending
xen/events: avoid handling the same event on two cpus at the same time
xen/netback
variables for rx/tx pending indicators in
order to split function calls and if condition.
Cc: sta...@vger.kernel.org
Fixes: 23025393dbeb3b ("xen/netback: use lateeoi irq binding")
Signed-off-by: Juergen Gross
Reviewed-by: Jan Beulich
Reviewed-by: Paul Durrant
Reviewed-by: Wei Liu
---
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.12-rc1-tag
xen: branch for v5.12-rc1
This batch contains a series of Xen related security fixes, all related
to limited error handling in Xen backend drivers.
Thanks.
Juergen
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc8-tag
xen: branch for v5.11-rc8
It contains a single fix for an issue introduced in 5.11: when running
as a Xen guest on Arm systems the kernel will hang during boot.
Thanks.
The ring buffer for user events is local to the given kernel instance,
so smp barriers are fine for ensuring consistency.
Reported-by: Andrew Cooper
Signed-off-by: Juergen Gross
Reviewed-by: Jan Beulich
---
drivers/xen/evtchn.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff
Add syfs 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
---
V2
For avoiding read- and write-tearing by the compiler use READ_ONCE()
and WRITE_ONCE() for accessing the ring indices in evtchn.c.
Signed-off-by: Juergen Gross
---
V2:
- modify all accesses (Julien Grall)
---
drivers/xen/evtchn.c | 25 -
1 file changed, 16 insertions
id of the other side.
While at it remove the stale prototype of bind_evtchn_to_irq_lateeoi().
Signed-off-by: Juergen Gross
Reviewed-by: Boris Ostrovsky
Reviewed-by: Wei Liu
---
drivers/block/xen-blkback/xenbus.c | 2 +-
drivers/net/xen-netback/interface.c | 16 +--
drivers/xen/events
-by: Julien Grall
Signed-off-by: Juergen Gross
---
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 files changed, 24 insertions
/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
Reported-by: Julien Grall
Signed-off-by: Juergen Gross
---
V2:
- new patch
---
drivers/xen/events/events_base.c | 19 +++
1 file changed, 15 insertions(+), 4 deletions(-)
diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c
index e157e7506830..f7
variables for rx/tx pending indicators in
order to split function calls and if condition.
Fixes: 23025393dbeb3b ("xen/netback: use lateeoi irq binding")
Signed-off-by: Juergen Gross
---
V2:
- new patch, fixing FreeBSD performance issue
---
drivers/net/xen-netback/interface.c | 8 +-
control.
Patches 7 and 8 are minor fixes I had lying around.
Juergen Gross (8):
xen/events: reset affinity of 2-level event when tearing it down
xen/events: don't unmask an event channel when an eoi is pending
xen/events: avoid handling the same event on two cpus at the same time
xen/netback
The if condition in irq_matrix_reserve() can be much simpler.
While at it fix a typo in the comment.
Signed-off-by: Juergen Gross
---
kernel/irq/matrix.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 651a4ad6d711
The following commit has been merged into the x86/paravirt branch of tip:
Commit-ID: afd30525a659ac0ae0904f0cb4a2ca75522c3123
Gitweb:
https://git.kernel.org/tip/afd30525a659ac0ae0904f0cb4a2ca75522c3123
Author:Juergen Gross
AuthorDate:Wed, 20 Jan 2021 14:55:45 +01:00
The following commit has been merged into the x86/paravirt branch of tip:
Commit-ID: 53c9d9240944088274aadbbbafc6138ca462db4f
Gitweb:
https://git.kernel.org/tip/53c9d9240944088274aadbbbafc6138ca462db4f
Author:Juergen Gross
AuthorDate:Wed, 20 Jan 2021 14:55:44 +01:00
The following commit has been merged into the x86/paravirt branch of tip:
Commit-ID: c3d7fa6684b5b3a07a48fc379d27bfb8a96661d9
Gitweb:
https://git.kernel.org/tip/c3d7fa6684b5b3a07a48fc379d27bfb8a96661d9
Author:Juergen Gross
AuthorDate:Wed, 20 Jan 2021 14:55:42 +01:00
The following commit has been merged into the x86/paravirt branch of tip:
Commit-ID: 5b4c6d65019bff65757f61adbbad5e45a333b800
Gitweb:
https://git.kernel.org/tip/5b4c6d65019bff65757f61adbbad5e45a333b800
Author:Juergen Gross
AuthorDate:Wed, 20 Jan 2021 14:55:43 +01:00
The following commit has been merged into the x86/paravirt branch of tip:
Commit-ID: ab234a260b1f625b26cbefa93ca365b0ae66df33
Gitweb:
https://git.kernel.org/tip/ab234a260b1f625b26cbefa93ca365b0ae66df33
Author:Juergen Gross
AuthorDate:Wed, 20 Jan 2021 14:55:46 +01:00
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
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
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
/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
. As 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
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 associated
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/
uot;xen/netback: use lateeoi irq binding")
Cc: sta...@vger.kernel.org
Signed-off-by: Juergen Gross
---
drivers/net/xen-netback/rx.c | 9 -
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/drivers/net/xen-netback/rx.c b/drivers/net/xen-netback/rx.c
index b8febe1d1bfd.
+++
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
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
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/
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
-by: 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
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/include/asm
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: use sp
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 | 16
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
-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/paravi
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
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
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
)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 robot
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/x86/in
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
the 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 +-
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
---
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
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
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
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
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
-by: 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
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 | 16
ed 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: use specific Xen pv interrupt entry for D
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/include/asm
-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/paravi
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 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
)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 robot
the 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 +-
arch/x86
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
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
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/x86/in
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
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
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.11-rc1b-tag
xen: branch for v5.11-rc1
It contains some minor cleanup patches and a small series disentangling some Xen
related Kconfig options.
Thanks.
Juergen
following patches
of the series.
Signed-off-by: Juergen Gross
---
tools/objtool/check.c | 180
tools/objtool/check.h | 5 ++
tools/objtool/orc_gen.c | 178 +--
3 files changed, 289 insertions(+), 74 deletion
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)
---
arch/x86/include/asm/cpufeatures.h | 2 ++
arch/x86/kernel/alternative.c | 40
out the time interfaces
into a new header file.
Signed-off-by: Juergen Gross
---
arch/x86/Kconfig | 1 +
arch/x86/include/asm/mshyperv.h | 11
arch/x86/include/asm/paravirt.h | 14 --
arch/x86/include/asm/paravirt_time.h | 38
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/x86/in
)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
---
arch/x86/include/asm/paravirt_types.h | 25
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
-by: Juergen Gross
---
arch/x86/include/asm/paravirt.h | 72 ++
arch/x86/include/asm/paravirt_types.h | 1 -
arch/x86/kernel/paravirt.c| 16 ++---
arch/x86/kernel/paravirt_patch.c | 88 ---
4 files changed, 53 insertions(+), 124 deletions
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
TIVE_TERNARY "default_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 "f
-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/paravi
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
file disentangling.
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 DF
x86/pv: switch SWAPGS to ALTERNATIVE
x86/xen
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
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/include/asm
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 | 16
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