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kvm_cpu_accept_dm_intr and kvm_vcpu_ready_for_interrupt_injection are
a hodge-podge of conditions, hacked together to get something that
more or less works. But what is actually needed is much simpler;
in both cases the fundamental question is, do we have a place to stash
an interrupt if userspace does KVM_INTERRUPT?
In userspace irqchip mode, that is !vcpu->arch.interrupt.injected.
Currently kvm_event_needs_reinjection(vcpu) covers it, but it is
unnecessarily restrictive.
In split irqchip mode it's a bit more complicated, we need to check
kvm_apic_accept_pic_intr(vcpu) (the IRQ window exit is basically an INTACK
cycle and thus requires ExtINTs not to be masked) as well as
!pending_userspace_extint(vcpu). However, there is no need to
check kvm_event_needs_reinjection(vcpu), since split irqchip keeps
pending ExtINT state separate from event injection state, and checking
kvm_cpu_has_interrupt(vcpu) is wrong too since ExtINT has higher
priority than APIC interrupts. In fact the latter fixes a bug:
when userspace requests an IRQ window vmexit, an interrupt in the
local APIC can cause kvm_cpu_has_interrupt() to be true and thus
kvm_vcpu_ready_for_interrupt_injection() to return false. When this
happens, vcpu_run does not exit to userspace but the interrupt window
vmexits keep occurring. The VM loops without any hope of making progress.
Once we try to fix these with something like
return kvm_arch_interrupt_allowed(vcpu) &&
- !kvm_cpu_has_interrupt(vcpu) &&
- !kvm_event_needs_reinjection(vcpu) &&
- kvm_cpu_accept_dm_intr(vcpu);
+ (!lapic_in_kernel(vcpu)
+ ? !vcpu->arch.interrupt.injected
+ : (kvm_apic_accept_pic_intr(vcpu)
+ && !pending_userspace_extint(v)));
we realize two things. First, thanks to the previous patch the complex
conditional can reuse !kvm_cpu_has_extint(vcpu). Second, the interrupt
window request in vcpu_enter_guest()
bool req_int_win =
dm_request_for_irq_injection(vcpu) &&
kvm_cpu_accept_dm_intr(vcpu);
should be kept in sync with kvm_vcpu_ready_for_interrupt_injection():
it is unnecessary to ask the processor for an interrupt window
if we would not be able to return to userspace. Therefore,
kvm_cpu_accept_dm_intr(vcpu) is basically !kvm_cpu_has_extint(vcpu)
ANDed with the existing check for masked ExtINT. It all makes sense:
- we can accept an interrupt from userspace if there is a place
to stash it (and, for irqchip split, ExtINTs are not masked).
Interrupts from userspace _can_ be accepted even if right now
EFLAGS.IF=0.
- in order to tell userspace we will inject its interrupt ("IRQ
window open" i.e. kvm_vcpu_ready_for_interrupt_injection), both
KVM and the vCPU need to be ready to accept the interrupt.
... and this is what the patch implements.
Reported-by: David Woodhouse <dwmw@amazon.co.uk>
Analyzed-by: David Woodhouse <dwmw@amazon.co.uk>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Nikos Tsironis <ntsironis@arrikto.com>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Tested-by: David Woodhouse <dwmw@amazon.co.uk>
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Centralize handling of interrupts from the userspace APIC
in kvm_cpu_has_extint and kvm_cpu_get_extint, since
userspace APIC interrupts are handled more or less the
same as ExtINTs are with split irqchip. This removes
duplicated code from kvm_cpu_has_injectable_intr and
kvm_cpu_has_interrupt, and makes the code more similar
between kvm_cpu_has_{extint,interrupt} on one side
and kvm_cpu_get_{extint,interrupt} on the other.
Cc: stable@vger.kernel.org
Reviewed-by: Filippo Sironi <sironi@amazon.de>
Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>
Tested-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Any record with a trailing newline (LOG_NEWLINE flag) cannot
be continued because the newline has been stripped and will
not be visible if the message is appended. This was already
handled correctly when committing in log_output() but was
not handled correctly when committing in log_store().
Fixes: f5f022e53b87 ("printk: reimplement log_cont using record extension")
Link: https://lore.kernel.org/r/20201126114836.14750-1-john.ogness@linutronix.de
Reported-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Tested-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Signed-off-by: Petr Mladek <pmladek@suse.com>
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0day reported one -22.7% regression for will-it-scale page_fault2
case [1] on a 4 sockets 144 CPU platform, and bisected to it to be
caused by Waiman's optimization (commit bd0b230fe1) of saving one
'struct page_counter' space for 'struct mem_cgroup'.
Initially we thought it was due to the cache alignment change introduced
by the patch, but further debug shows that it is due to some hot data
members ('vmstats_local', 'vmstats_percpu', 'vmstats') sit in 2 adjacent
cacheline (2N and 2N+1 cacheline), and when adjacent cache line prefetch
is enabled, it triggers an "extended level" of cache false sharing for
2 adjacent cache lines.
So exchange the 2 member blocks, while keeping mostly the original
cache alignment, which can restore and even enhance the performance,
and save 64 bytes of space for 'struct mem_cgroup' (from 2880 to 2816,
with 0day's default RHEL-8.3 kernel config)
[1]. https://lore.kernel.org/lkml/20201102091543.GM31092@shao2-debian/
Fixes: bd0b230fe145 ("mm/memcg: unify swap and memsw page counters")
Reported-by: kernel test robot <rong.a.chen@intel.com>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Acked-by: Waiman Long <longman@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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My virtual IOMMU implementation is whining that the guest is reading a
register that doesn't exist. Only read the VCCAP_REG if the corresponding
capability is set in ECAP_REG to indicate that it actually exists.
Fixes: 3375303e8287 ("iommu/vt-d: Add custom allocator for IOASID")
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Liu Yi L <yi.l.liu@intel.com>
Cc: stable@vger.kernel.org # v5.7+
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/de32b150ffaa752e0cff8571b17dfb1213fbe71c.camel@infradead.org
Signed-off-by: Will Deacon <will@kernel.org>
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Add touchscreen info for the Irbis TW118 tablet.
Reported-and-tested-by: russianneuromancer <russianneuromancer@ya.ru>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201124110454.114286-1-hdegoede@redhat.com
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Add touchscreen info for the Predia Basic tablet.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20201015194949.50566-1-hdegoede@redhat.com
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The Pavilion 13 x360 PC has a chassis-type which does not indicate it is
a convertible, while it is actually a convertible. Add it to the
dmi_switches_allow_list.
Signed-off-by: Max Verevkin <me@maxverevkin.tk>
Link: https://lore.kernel.org/r/20201124131652.11165-1-me@maxverevkin.tk
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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The commit 78429e55e4057 ("platform/x86: toshiba_acpi: Clean up
variable declaration") cleans up variable declaration in
video_proc_write(). Seems it does the variable assignment in the
wrong place, this results in dead code and changes the source code
logic. Fix it by doing the assignment at the beginning of the funciton.
Fixes: 78429e55e4057 ("platform/x86: toshiba_acpi: Clean up variable declaration")
Reported-by: Tosk Robot <tencent_os_robot@tencent.com>
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Link: https://lore.kernel.org/r/1606024177-16481-1-git-send-email-kaixuxia@tencent.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Got a dmesg message on my AMD Renoir based Acer laptop:
"acer_wmi: Unknown key number - 0x84" when toggling keyboard
background light
Signed-off-by: Timo Witte <timo.witte@gmail.com>
Reviewed-by: "Lee, Chun-Yi" <jlee@suse.com>
Link: https://lore.kernel.org/r/20200804001423.36778-1-timo.witte@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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This commit enables dual fan control for the following new Lenovo
models: P15, P15v.
Signed-off-by: Matthias Maier <tamiko@43-1.org>
Link: https://lore.kernel.org/r/20201126000416.2459645-2-tamiko-ibm-acpi-devel@43-1.org
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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The lid state may change while the machine is suspended. As such, we may
need to re-check the state at wake-up time (at least when waking up from
hibernation).
Add the appropriate call to the resume handler in order to sync the
SW_TABLET_MODE switch state with the hardware state.
Fixes: dda3ec0aa631 ("platform/x86: thinkpad_acpi: Implement tablet mode using GMMS method")
BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=210269
Signed-off-by: Benjamin Berg <bberg@redhat.com>
Acked-by: Henrique de Moraes Holschuh <hnh@hmh.eng.br>
Link: https://lore.kernel.org/r/20201123132157.866303-1-benjamin@sipsolutions.net
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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The Thinkpad Yoga 11e 4th gen with the N3450 / Celeron CPU only has
one battery which is named BAT1 instead of the expected BAT0, add a
quirk for this. This fixes not being able to set the charging tresholds
on this model; and this alsoe fixes the following errors in dmesg:
ACPI: \_SB_.PCI0.LPCB.EC__.HKEY: BCTG evaluated but flagged as error
thinkpad_acpi: Error probing battery 2
battery: extension failed to load: ThinkPad Battery Extension
battery: extension unregistered: ThinkPad Battery Extension
Note that the added quirk is for the "R0K" BIOS versions which are
used on the Thinkpad Yoga 11e 4th gen's with a Celeron CPU, there
is a separate "R0L" BIOS for the i3/i5 based versions. This may also
need the same quirk, but if that really is necessary is unknown.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201109103550.16265-1-hdegoede@redhat.com
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The Yoga 11e series has 2 accelerometers described by a BOSC0200 ACPI node.
This setup relies on a Windows service which reads both accelerometers and
then calculates the angle between the 2 halves to determine laptop / tent /
tablet mode and then reports the calculated mode back to the EC by calling
special ACPI methods on the BOSC0200 node.
The bmc150 iio driver does not support this (it involves double
calculations requiring sqrt and arccos so this really needs to be done
in userspace), as a result of this on the Yoga 11e the thinkpad_acpi
code always reports SW_TABLET_MODE=0, starting with GNOME 3.38 reporting
SW_TABLET_MODE=0 causes GNOME to:
1. Not show the onscreen keyboard when a text-input field is focussed
with the touchscreen.
2. Disable accelerometer based auto display-rotation.
This makes sense when in laptop-mode but not when in tablet-mode. But
since for the Yoga 11e the thinkpad_acpi code always reports
SW_TABLET_MODE=0, GNOME does not know when the device is in tablet-mode.
Stop reporting the broken (always 0) SW_TABLET_MODE on Yoga 11e models
to fix this.
Note there are plans for userspace to support 360 degree hinges style
2-in-1s with 2 accelerometers and figure out the mode by itself, see:
https://gitlab.freedesktop.org/hadess/iio-sensor-proxy/-/issues/216
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20201106140130.46820-1-hdegoede@redhat.com
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Tested on my P1 gen3, works fine with `thinkfan`. Since thinkpad_acpi fan
control is off by default, it is safe to add 2nd fan control for brave
overclockers
Signed-off-by: Iakov 'Jake' Kirilenko <jake.kirilenko@gmail.com>
Link: https://lore.kernel.org/r/20201105152556.34073-1-jake.kirilenko@gmail.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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Fix existing issues at the kernel-doc markups and add them to
the vidtv.rst file.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Update the vidtv documentation with the relevant changes
after the last patches.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- pass struct vidtv_psi_eit_write_args as a pointer;
- avoid initializing struct fields multiple times.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- pass struct vidtv_psi_nit_write_args as a pointer;
- avoid initializing struct fields multiple times.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- pass struct vidtv_psi_sdt_write_args as a pointer;
- avoid initializing struct fields multiple times.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- Pass struct vidtv_psi_pmt_write_args as a pointer;
- Avoid initializing structs multiple times.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Avoid initializing the structs multiple times and pass the
PAT struct as a pointer, instead of a var.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- Pass struct header_write_args as a pointer, instead of
passing as a var;
- Initialize the psi_args struct only once.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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This function initializes the psi_args twice, and receives
a struct, instead of a pointer to a struct.
Clean it up.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Cleanup the table_section_crc32_write_into() function
by initializing struct psi_write_args only once and by
passing the args as a pointer.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The function vidtv_psi_ts_psi_write_into() initializes the
ts_header fields several times, and receives a struct
as argument, instead of using a pointer to struct.
Cleanup the function, in order to reduce its stack usage
and to avoid initializing the ts_header multiple times.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The current event is using an undefined date. Instead, it
should be the timestamp when the EIT table was generated.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The service_id there should be equal to the one used
on other tables, otherwise, EIT entries won't be valid.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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As the service currently broadcasts just audio, change the
service type to reflect that.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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On normal TS streams, the NIT table has its own entry at PAT,
but not at PMT.
While here, properly handle alloc problems when creating
PMT entries.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The EIT header ID field should not contain the network ID, but,
instead, the service_id of the program described at EIT.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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As defined at ETSI TS 101 162, original network IDs up to 0xfebf
are reserved for registration at dvb.org.
Let's use, instead, an original network ID at the range
0xff00-0xffff, as this is for private temporary usage.
As the same value is also used for the network ID,
the range 0xff01-0xffff also fits better, as values
lower than that depend if the network is used for
satellite, terrestrial, cable of CI.
While here, move the TS ID to the bridge code, where it
is used, and change its value, as it was identical to
the value previously used by network ID. While we could
keep the same value, let's change it, just to make easier
to check for the new code while reading it with DVB tools
like dvbinspector.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Place some text at EIT data, and use ISO 8859-15 encoding for
the German letter "ü" (u mit umlat) letter.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Initialize the destination buffer/size and the initial
offset when creating the local var.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Instead of first zeroing all fields at the mux structs and
then filling, do some initialization for the const data
when they're created.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Right now, there's no need to access the length of some
tables. So, drop the unused functions.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Do some cleanups at the coding style of the driver:
- remove "inline" declarations;
- use reverse xmas-tree for local var declarations;
- Adjust some indent to avoid breaking 80-cols;
- Cleanup some comments.
No functional changes.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Commit 03e0d26fcf79 ("drm/nouveau: slowpath for pushbuf ioctl") included
a logic-bug which results in the relocations not actually getting
applied at all as the call to nouveau_gem_pushbuf_reloc_apply() is
never reached. This causes a regression with graphical corruption,
triggered when relocations need to be done (for example after a
suspend/resume cycle.)
Fix by setting *apply_relocs value only if there were more than 0
relocations.
Additionally, the never reached code had a leftover u_free() call,
which, after fixing the logic, now got called and resulted in a
double-free. Fix by removing one u_free(), moving the other
and adding check for errors.
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Ben Skeggs <bskeggs@redhat.com>
Cc: nouveau@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Matti Hamalainen <ccr@tnsp.org>
Fixes: 03e0d26fcf79 ("drm/nouveau: slowpath for pushbuf ioctl")
References: https://gitlab.freedesktop.org/drm/nouveau/-/issues/11
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20201120152338.1203257-1-ccr@tnsp.org
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Minimize the number of data copies and initialization at
the code, passing them as pointers instead of duplicating
the data.
The only case where we're keeping the data copy is at
vidtv_pes_write_h(), as it needs a copy of the passed
arguments. On such case, we're being more explicit.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Initialize the fields of the arguments directly when
declaring it, and pass the args as a pointer, instead of
copying them.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The sheet music used to generate the tones had a few
polyphonic notes. Due to that, its conversion to a
tones sequence had a few errors.
Also, due to a bug at the tone generator, it was missing
the pause at the initial compass.
Fix them.
While here, reduce the compass to 100bpm.
The music was converted from a Music XML file using
this small script:
<snip>
my $count = 0;
my $silent = 0;
my $note;
my $octave;
print "\t";
while (<>) {
$note = $1 if (m,\<step\>(.*)\</step\>,);
$octave = "_$1" if (m,\<octave\>(.*)\</octave\>,);
if (m,\<alter\>1\</alter\>,) {
$note .= "S";
$sharp = 1;
}
if (m,\<rest/\>,) {
$note = "SILENT";
$silent = 1;
}
if (m,\<duration\>(.*)\</duration\>,) {
printf "{ NOTE_${note}${octave}, %d},", $1 * 128 / 480;
$count++;
if ($silent || $count >= 3) {
print "\n\t";
$count = 0;
$silent = 0;
} else {
print " ";
print " " if (!$sharp);
}
$sharp = 0;
$note = "";
$octave = "";
};
};
print "\n";
</snip>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The tone generator logic were repeating the song after the
first silent. There's also a wrong logic at the note
offset calculus, which may create some noise.
Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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While the original plan was to use the first movement of
the 5th Symphony, it was opted to use the Für Elise song,
instead.
Fix it.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The Linux stack is too short. So, using recursive functions
is a very bad idea. Convert those into non-recursive ones.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Currently, there are not checks if something gets bad during
memory allocation: it will simply use NULL pointers and
crash.
Add error path at the logic which allocates memory for the
MPEG-TS generator code, propagating the errors up to the
vidtv_bridge. Now, if something wents bad, start_streaming
will return an error that userspace can detect:
ERROR DMX_SET_PES_FILTER failed (PID = 0x2000): 12 Cannot allocate memory
and the driver doesn't crash.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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- Place the includes on alphabetical order;
- get rid of asm/byteorder.h;
- add bug.h at vidtv_s302m.c, as it is needed by
inux/fixp-arith.h
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Some variables were only assigned once but were used in while
loops as if they had been updated at every iteration. Fix this.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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A few fields used only by the tone generator in the s302m encoder
are stored in struct vidtv_encoder. Move them into
struct vidtv_s302m_ctx instead. While we are at it: fix a
checkpatch warning for long lines.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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The code to append a descriptor to the end of a chain is repeated
throughout the psi generator code. Extract it into its own helper
function to avoid cluttering.
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Implement an Event Information Table (EIT) as per EN 300 468
5.2.4.
The EIT provides information in chronological order regarding
the events contained within each service.
For now only present event information is supported.
[mchehab+huawei@kernel.org: removed an extra blank line]
Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
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Paolo Bonzini
John Ogness
Feng Tang
David Woodhouse
Hans de Goede
Max Verevkin
Kaixu Xia
Timo Witte
Matthias Maier
Benjamin Berg
Iakov 'Jake' Kirilenko
Mauro Carvalho Chehab
Matti Hamalainen
Daniel W. S. Almeida