On 03.01.24 09:00, maobibo wrote:
On 2024/1/3 下午3:40, Jürgen Groß wrote:
On 03.01.24 08:16, Bibo Mao wrote:
The patch add paravirt interface for guest kernel, it checks whether
system runs on VM mode. If it is, it will detect hypervisor type. And
returns true it is KVM hypervisor, else
Now that paravirt is using the alternatives patching infrastructure,
remove the paravirt patching code.
Signed-off-by: Juergen Gross
Acked-by: Peter Zijlstra (Intel)
---
arch/x86/include/asm/paravirt.h | 13 --
arch/x86/include/asm/paravirt_types.h | 38 ---
arch/x86
Instead of stacking alternative and paravirt patching, use the new
ALT_FLAG_CALL flag to switch those mixed calls to pure alternative
handling.
This eliminates the need to be careful regarding the sequence of
alternative and paravirt patching.
Signed-off-by: Juergen Gross
Acked-by: Peter
As a preparation for replacing paravirt patching completely by
alternative patching, move some backend functions and #defines to
alternative code and header.
Signed-off-by: Juergen Gross
---
V4:
- rename x86_nop() to nop_func() and x86_BUG() to BUG_func() (Boris
Petkov)
---
arch/x86/include
Introduce the macro ALT_NOT_XEN as a short form of
ALT_NOT(X86_FEATURE_XENPV).
Suggested-by: Peter Zijlstra (Intel)
Signed-off-by: Juergen Gross
---
V3:
- split off from next patch
V5:
- move patch to the start of the series (Boris Petkov)
---
arch/x86/include/asm/paravirt.h | 42
- rebase of patch 2 as suggested by Peter
- addressed Peter's comments for patch 3
Juergen Gross (5):
x86/paravirt: introduce ALT_NOT_XEN
x86/paravirt: move some functions and defines to alternative
x86/alternative: add indirect call patching
x86/paravirt: switch mixed paravirt/alternative calls
On 08.12.23 13:57, Borislav Petkov wrote:
On Fri, Dec 08, 2023 at 12:53:47PM +0100, Juergen Gross wrote:
Took me a while to find it. Patch 5 was repairing the issue again
Can't have that. Any patch in any set must build and boot successfully
for bisection reasons.
Of course.
The problem
On 06.12.23 12:08, Borislav Petkov wrote:
On Wed, Nov 29, 2023 at 02:33:31PM +0100, Juergen Gross wrote:
Instead of stacking alternative and paravirt patching, use the new
ALT_FLAG_CALL flag to switch those mixed calls to pure alternative
handling.
This eliminates the need to be careful
Introduce the macro ALT_NOT_XEN as a short form of
ALT_NOT(X86_FEATURE_XENPV).
Suggested-by: Peter Zijlstra (Intel)
Signed-off-by: Juergen Gross
---
V3:
- split off from next patch
V5:
- move patch to the start of the series (Boris Petkov)
---
arch/x86/include/asm/paravirt.h | 42
On 21.11.23 19:45, Borislav Petkov wrote:
On Mon, Oct 30, 2023 at 03:25:07PM +0100, Juergen Gross wrote:
Instead of stacking alternative and paravirt patching, use the new
ALT_FLAG_CALL flag to switch those mixed calls to pure alternative
handling.
This eliminates the need to be careful
On 14.11.23 16:09, Borislav Petkov wrote:
On Mon, Oct 30, 2023 at 03:25:06PM +0100, Juergen Gross wrote:
Introduce the macro ALT_NOT_XEN as a short form of
ALT_NOT(X86_FEATURE_XENPV).
Not crazy about adding yet another macro indirection - at least with the
X86_FEATURE_ it is clear what
On 13.09.23 15:26, Steven Rostedt wrote:
On Wed, 13 Sep 2023 13:38:27 +0200
Juergen Gross wrote:
diff --git a/include/trace/events/xen.h b/include/trace/events/xen.h
index 44a3f565264d..0577f0cdd231 100644
--- a/include/trace/events/xen.h
+++ b/include/trace/events/xen.h
@@ -6,26 +6,26
change.
Signed-off-by: Juergen Gross
---
arch/x86/include/asm/paravirt_types.h | 15 --
arch/x86/include/asm/xen/hypervisor.h | 26 +++
arch/x86/kernel/paravirt.c| 67 ---
arch/x86/xen/enlighten_pv.c | 39 +---
a
This small series is cleaning up Xen lazy mode handling by removing
unused stuff and moving purely Xen-specific code away from general
kernel code.
The last patch is fixing a regression which was introduced in the
6.6 merge window.
Juergen Gross (3):
arm/xen: remove lazy mode related
On 13.04.21 11:03, Yunsheng Lin wrote:
On 2021/4/13 16:33, Hillf Danton wrote:
On Tue, 13 Apr 2021 15:57:29 Yunsheng Lin wrote:
On 2021/4/13 15:12, Hillf Danton wrote:
On Tue, 13 Apr 2021 11:34:27 Yunsheng Lin wrote:
On 2021/4/13 11:26, Hillf Danton wrote:
On Tue, 13 Apr 2021 10:56:42
On 12.04.21 10:26, Christoph Hellwig wrote:
On Mon, Apr 12, 2021 at 10:00:14AM +0200, Peter Zijlstra wrote:
Instead of relying on apply_to_page_range() being available to
modules, move its use into core kernel code and export it's
application.
This doesn't exactly look great, but at least it
On 12.04.21 03:04, Yunsheng Lin wrote:
On 2021/4/9 13:31, Juergen Gross wrote:
On 25.03.21 04:13, Yunsheng Lin wrote:
Lockless qdisc has below concurrent problem:
cpu0 cpu1
. .
q->enqu
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.12b-rc7-tag
xen: branch for v5.12-rc7
It contains a single fix of a 5.12 patch for the rather uncommon problem of
running as a Xen guest with a real time kernel config.
Thanks.
erage latency reported by sysbench is well below
1 msec, but at least once per hour I get latencies in the minute
range.
With this patch I don't see these high latencies any longer (test
is running for more than 20 hours now).
So you can add my:
Tested-by: Juergen Gross
Juergen
OpenPGP_0xB0DE9DD628
On 06.04.21 09:06, Michal Kubecek wrote:
On Tue, Apr 06, 2021 at 08:55:41AM +0800, Yunsheng Lin wrote:
Hi, Jiri
Do you have a reproducer that can be shared here?
With reproducer, I can debug and test it myself too.
I'm afraid we are not aware of a simple reproducer. As mentioned in the
On 02.04.21 18:11, Paul E. McKenney wrote:
On Fri, Apr 02, 2021 at 05:46:52PM +0200, Juergen Gross wrote:
On 30.03.21 19:33, Paul E. McKenney wrote:
On Wed, Mar 24, 2021 at 11:18:03AM +0100, Jürgen Groß wrote:
On 02.03.21 07:28, Juergen Gross wrote:
In order to help identifying problems
On 30.03.21 19:33, Paul E. McKenney wrote:
On Wed, Mar 24, 2021 at 11:18:03AM +0100, Jürgen Groß wrote:
On 02.03.21 07:28, Juergen Gross wrote:
In order to help identifying problems with IPI handling and remote
function execution add some more data to IPI debugging code.
There have been
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.12b-rc6-tag
xen: branch for v5.12-rc6
It contains one Xen related security fix (XSA-371).
Thanks.
Juergen
drivers/block/xen-blkback/blkback.c | 2 +-
1 file changed, 1
] state
drivers/xen/xen-pciback/pci_stub.c:973:31:got int
Signed-off-by: Muhammad Usama Anjum
Reviewed-by: Juergen Gross
Juergen
OpenPGP_0xB0DE9DD628BF132F.asc
Description: application/pgp-keys
OpenPGP_signature
Description: OpenPGP digital signature
Linus,
Please git pull the following tag:
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git
for-linus-5.12b-rc5-tag
xen: branch for v5.12-rc5
It contains a small series with a more elegant fix of a problem which
was originally fixed in rc2.
Thanks.
Juergen
The following commit has been merged into the irq/core branch of tip:
Commit-ID: 2c6b02185cc608c19a22691fadc6ca2cd114c286
Gitweb:
https://git.kernel.org/tip/2c6b02185cc608c19a22691fadc6ca2cd114c286
Author:Juergen Gross
AuthorDate:Thu, 11 Feb 2021 08:09:53 +01:00
Committer
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: dda7bb76484978316bb412a353789ebc5901de36
Gitweb:
https://git.kernel.org/tip/dda7bb76484978316bb412a353789ebc5901de36
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:10 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 5e21a3ecad1500e35b46701e7f3f232e15d78e69
Gitweb:
https://git.kernel.org/tip/5e21a3ecad1500e35b46701e7f3f232e15d78e69
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:06 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 6ea312d95e0226b306bb4b8ee3a0727d880378cb
Gitweb:
https://git.kernel.org/tip/6ea312d95e0226b306bb4b8ee3a0727d880378cb
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:08 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: b046664872dd78a8bebe3d5f3bb9da9baa93f5ca
Gitweb:
https://git.kernel.org/tip/b046664872dd78a8bebe3d5f3bb9da9baa93f5ca
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:07 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: e208b3c4a9748b2c17aa09ba663b5096ccf82dce
Gitweb:
https://git.kernel.org/tip/e208b3c4a9748b2c17aa09ba663b5096ccf82dce
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:11 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: a0e2bf7cb7006b5a58ee81f4da4fe575875f2781
Gitweb:
https://git.kernel.org/tip/a0e2bf7cb7006b5a58ee81f4da4fe575875f2781
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:09 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 33634e42e38be61f320183dfc264b9caba292d4e
Gitweb:
https://git.kernel.org/tip/33634e42e38be61f320183dfc264b9caba292d4e
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:14 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 2fe2a2c7a97c9bc32acc79154b75e754280f7867
Gitweb:
https://git.kernel.org/tip/2fe2a2c7a97c9bc32acc79154b75e754280f7867
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:12 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 4e6292114c741221479046515b1aa8145cf1e3f6
Gitweb:
https://git.kernel.org/tip/4e6292114c741221479046515b1aa8145cf1e3f6
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:13 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 00aa3193ab7a04b25bb8c68e377815696eb5bf56
Gitweb:
https://git.kernel.org/tip/00aa3193ab7a04b25bb8c68e377815696eb5bf56
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:17 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: ae755b5a45482b5de4d96d6f35823076af77445e
Gitweb:
https://git.kernel.org/tip/ae755b5a45482b5de4d96d6f35823076af77445e
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:16 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 0b8d366a942fd48a83dfa728e9f8a8d8b20e735f
Gitweb:
https://git.kernel.org/tip/0b8d366a942fd48a83dfa728e9f8a8d8b20e735f
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:15 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: fafe5e74229fd3f425e3cbfc68b90e615aa6d62f
Gitweb:
https://git.kernel.org/tip/fafe5e74229fd3f425e3cbfc68b90e615aa6d62f
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:18 +01:00
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: 054ac8ad5ebe4a69e1f0e842483821ddbe560121
Gitweb:
https://git.kernel.org/tip/054ac8ad5ebe4a69e1f0e842483821ddbe560121
Author:Juergen Gross
AuthorDate:Thu, 11 Mar 2021 15:23:19 +01:00
un}map_ops[]
Xen/gnttab: introduce common INVALID_GRANT_{HANDLE,REF}
Xen/gntdev: don't needlessly use kvcalloc()
Juergen Gross (3):
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: avoi
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
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 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
the 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/include/asm
)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
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/asm/ir
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
_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
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
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
-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 insertions
The following commit has been merged into the x86/alternatives branch of tip:
Commit-ID: db16e07269c2b4346e4332e43f04e447ef14fd2f
Gitweb:
https://git.kernel.org/tip/db16e07269c2b4346e4332e43f04e447ef14fd2f
Author:Juergen Gross
AuthorDate:Tue, 09 Mar 2021 14:48:04 +01:00
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
the 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/include/asm
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
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
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/asm/ir
"
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
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
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
)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
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 --git
-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 insertions
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
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
)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
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
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
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
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
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 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
-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 --git
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/alternative.h
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't
/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
-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
.
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/events_b
The following commit has been merged into the locking/core branch of tip:
Commit-ID: de7b09ef658d637eed0584eaba30884e409aef31
Gitweb:
https://git.kernel.org/tip/de7b09ef658d637eed0584eaba30884e409aef31
Author:Juergen Gross
AuthorDate:Mon, 01 Mar 2021 11:13:35 +01:00
The following commit has been merged into the locking/core branch of tip:
Commit-ID: a5aabace5fb8abf2adcfcf0fe54c089b20d71755
Gitweb:
https://git.kernel.org/tip/a5aabace5fb8abf2adcfcf0fe54c089b20d71755
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: 8d0968cc6b8ffd8496c2ebffdfdc801f949a85e5
Gitweb:
https://git.kernel.org/tip/8d0968cc6b8ffd8496c2ebffdfdc801f949a85e5
Author:Juergen Gross
AuthorDate:Mon, 01 Mar 2021 11:13:34 +01:00
(-)
Jan Beulich (2):
Xen/gnttab: handle p2m update errors on a per-slot basis
xen-netback: respect gnttab_map_refs()'s return value
Juergen Gross (1):
xen: fix p2m size in dom0 for disabled memory hotplug case
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
configurations.
Signed-
, 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
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
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
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 changed, 1
The following commit has been merged into the locking/core branch of tip:
Commit-ID: 4b816578c16b92b68fb9842dcec0bc2fdc2b36d8
Gitweb:
https://git.kernel.org/tip/4b816578c16b92b68fb9842dcec0bc2fdc2b36d8
Author:Juergen Gross
AuthorDate:Mon, 01 Mar 2021 11:13:34 +01:00
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
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