On Wed, Mar 19, 2025 at 10:43:12AM +0100, Jan Beulich wrote:
> On 19.03.2025 10:15, Jan Beulich wrote:
> > On 18.03.2025 18:01, Marek Marczykowski-Górecki wrote:
> >> --- a/xen/Makefile
> >> +++ b/xen/Makefile
> >> @@ -411,6 +411,8 @@ ifneq ($(CONFIG_CC_IS_CLANG),y)
> >> CFLAGS += -Wa,--strip-loca
On 19.03.2025 15:20, Andrew Cooper wrote:
> The current CI failures happen to be a latent bug triggered by a narrow set of
> properties of the initrd, which CI encountered by chance.
Plus properties of the host memory map.
> One step during boot involves constructing directmap mappings for module
On Mon, Mar 17, 2025 at 11:34:12AM -0700, Pierrick Bouvier wrote:
> Reviewed-by: Philippe Mathieu-Daudé
> Signed-off-by: Pierrick Bouvier
Reviewed-by: Anthony PERARD
Thanks,
--
Anthony Perard | Vates XCP-ng Developer
XCP-ng & Xen Orchestra - Vates solutions
web: https://vates.tech
On Wed, Mar 19, 2025 at 12:21:53PM +0100, Jan Beulich wrote:
> If a module's length is an exact multiple of PAGE_SIZE, the 2nd argument
> passed to set_pdx_range() would be one larger than intended. Use
> PFN_{UP,DOWN}() there instead.
>
> Fixes: cd7cc5320bb2 ("x86/boot: add start and size fields
Queued for 10.0.
On 19.03.2025 14:40, Marek Marczykowski-Górecki wrote:
> On Wed, Mar 19, 2025 at 01:43:59PM +0100, Jan Beulich wrote:
>> On 19.03.2025 12:58, Marek Marczykowski-Górecki wrote:
>>> On Wed, Mar 19, 2025 at 10:43:12AM +0100, Jan Beulich wrote:
On 19.03.2025 10:15, Jan Beulich wrote:
> On 18.0
On 19/03/2025 15:05, Andrew Cooper wrote:
>
>
> On 19/03/2025 2:01 pm, Alejandro Vallejo wrote:
>> On Tue Mar 18, 2025 at 9:00 AM GMT, Michal Orzel wrote:
>>> We are missing a way to detect whether a user provided a value for
>>> nr_spis equal to 0 or did not provide any value (default is also
On 19/03/2025 11:18 am, Jan Beulich wrote:
> As per observation in practice, initrd->cmdline_pa is not normally zero.
> Hence so far we always appended at least one byte. That alone may
> already render insufficient the "allocation" made by find_memory().
> Things would be worse when there's actual
On 19/03/2025 2:01 pm, Alejandro Vallejo wrote:
> On Tue Mar 18, 2025 at 9:00 AM GMT, Michal Orzel wrote:
>> We are missing a way to detect whether a user provided a value for
>> nr_spis equal to 0 or did not provide any value (default is also 0) which
>> can cause issues when calculated nr_spis is
On 17.03.25 16:56, Jan Beulich wrote:
> On 14.03.2025 14:34, Mykyta Poturai wrote:
>> From: Oleksandr Tyshchenko
>>
>> The main purpose of this patch is to add a way to register PCI device
>> (which is behind the IOMMU) using the generic PCI-IOMMU DT bindings [1]
>> before assigning that device to
On 19/03/2025 12:15 pm, Roger Pau Monné wrote:
> On Wed, Mar 19, 2025 at 12:21:53PM +0100, Jan Beulich wrote:
>> If a module's length is an exact multiple of PAGE_SIZE, the 2nd argument
>> passed to set_pdx_range() would be one larger than intended. Use
>> PFN_{UP,DOWN}() there instead.
>>
>> Fixes
On 19.03.2025 16:21, Mykyta Poturai wrote:
> On 17.03.25 16:56, Jan Beulich wrote:
>> On 14.03.2025 14:34, Mykyta Poturai wrote:
>>> From: Oleksandr Tyshchenko
>>>
>>> The main purpose of this patch is to add a way to register PCI device
>>> (which is behind the IOMMU) using the generic PCI-IOMMU
On 3/17/25 4:40 PM, Jan Beulich wrote:
On 11.03.2025 17:19, Oleksii Kurochko wrote:
Based on the code from [1] provided by Romain Caritey from Microchip
with some minor changes():
"Based on", to me at least, suggests an import from some other project. The
reference looks to be to a Xen tree th
The expression for one parameter of find_memory() is already complicated and
about to become moreso. Break it out into a new variable, and express it in
an easier-to-follow way.
No functional change.
Signed-off-by: Andrew Cooper
---
CC: Jan Beulich
CC: Roger Pau Monné
---
xen/arch/x86/hvm/do
On 17.03.2025 20:20, Andrew Cooper wrote:
> Move the declaration from asm/system.h into asm/traps.h.
>
> No functional change.
>
> Signed-off-by: Andrew Cooper
Acked-by: Jan Beulich
> --- a/xen/arch/x86/traps-setup.c
> +++ b/xen/arch/x86/traps-setup.c
> @@ -3,5 +3,20 @@
> * Configuration of
xen panic is observed with the following configuration.
1. Debug xen build (CONFIG_DEBUG=y)
2. dom1 of an ARINC653 domain
3. shutdown dom1 with xl command
$ xl shutdown
(XEN)
(XEN) Panic on CPU 2:
(XEN) Assertion '!in_irq() && (local_irq_is_enabled() ||
On 18.03.2025 18:35, Roger Pau Monne wrote:
> It's unclear why -N is being used in the first place. It was added by
> commit 40828c657dd0c back in 2004 without any justification.
Not really, no. That only moved it from LDFLAGS to an explicit use. Several
hops earlier it looks to be 4676bbf96dc8 (
On 18.03.2025 18:35, Roger Pau Monne wrote:
> Relocations are now applied after having moved the trampoline,
That's two entirely different sets of relocations, isn't it? What we generate
here is what is to be encoded in the PE binary's .reloc section, for the PE
loader to process. And for us to th
On Tuesday, March 18th, 2025 at 4:37 PM, dm...@proton.me
wrote:
>
>
> Switch console_focus address space from integers mapped to domain IDs to
> direct domain IDs, simplifying the console input switching code.
>
> Introduce console_set_focus() to set the console owner domain identifier.
>
>
On 19/03/2025 9:41 pm, Jason Andryuk wrote:
> On 2025-03-19 13:13, Andrew Cooper wrote:
>> The expression for one parameter of find_memory() is already
>> complicated and
>> about to become moreso. Break it out into a new variable, and
>> express it in
>> an easier-to-follow way.
>>
>> No function
On 3/11/25 16:13, Stewart Hildebrand wrote:
> diff --git a/xen/include/xen/vpci.h b/xen/include/xen/vpci.h
> index 807401b2eaa2..e355329913ef 100644
> --- a/xen/include/xen/vpci.h
> +++ b/xen/include/xen/vpci.h
> @@ -311,6 +311,18 @@ static inline int __must_check vpci_reset_device(struct
> pci_de
On 2025-03-19 13:13, Andrew Cooper wrote:
The expression for one parameter of find_memory() is already complicated and
about to become moreso. Break it out into a new variable, and express it in
an easier-to-follow way.
No functional change.
Signed-off-by: Andrew Cooper
Reviewed-by: Jason A
On 19.03.2025 11:32, Jan Beulich wrote:
> On 18.03.2025 18:35, Roger Pau Monne wrote:
>> Relocations are now applied after having moved the trampoline,
>
> That's two entirely different sets of relocations, isn't it? What we generate
> here is what is to be encoded in the PE binary's .reloc sectio
On 19.03.2025 11:46, Jan Beulich wrote:
> On 19.03.2025 11:32, Jan Beulich wrote:
>> On 18.03.2025 18:35, Roger Pau Monne wrote:
>>> Relocations are now applied after having moved the trampoline,
>>
>> That's two entirely different sets of relocations, isn't it? What we generate
>> here is what is
On 18.03.2025 18:35, Roger Pau Monne wrote:
> As a result of relocations now being applied after the trampoline has been
> copied into the low 1MB region, there's no need for a single .init section
> that's writable, as .init.text is no longer modified.
This builds on the confusion of the two diff
As per observation in practice, initrd->cmdline_pa is not normally zero.
Hence so far we always appended at least one byte. That alone may
already render insufficient the "allocation" made by find_memory().
Things would be worse when there's actually a (perhaps long) command
line.
Skip setup when
On Tue, Mar 18, 2025 at 06:01:56PM +0100, Marek Marczykowski-Górecki wrote:
> From: Frédéric Pierret (fepitre)
>
> It makes the build reproducible with fileordering flags
>
> Signed-off-by: Frédéric Pierret (fepitre)
> ---
> docs/xen-headers | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-
On 18.03.2025 14:05, Oleksii Kurochko wrote:
>
> On 3/17/25 9:07 PM, Luca Fancellu wrote:
>> From: Penny Zheng
>>
>> ARM MPU system doesn't need to use paging memory pool, as MPU memory
>> mapping table at most takes only one 4KB page, which is enough to
>> manage the maximum 255 MPU memory region
On Wed, Mar 19, 2025 at 11:19:33AM +, Anthony PERARD wrote:
> On Tue, Mar 18, 2025 at 06:01:56PM +0100, Marek Marczykowski-Górecki wrote:
> > From: Frédéric Pierret (fepitre)
> >
> > It makes the build reproducible with fileordering flags
> >
> > Signed-off-by: Frédéric Pierret (fepitre)
> >
From: Ahmed S. Darwish
CPUID leaf 0x2 emits one-byte descriptors in its four output registers
EAX, EBX, ECX, and EDX. For these descriptors to be valid, the most
significant bit (MSB) of each register must be clear.
Leaf 0x2 parsing at intel.c only validated the MSBs of EAX, EBX, and
ECX, but l
Hi Michal,
On 17/03/2025 11:40, Orzel, Michal wrote:
On 13/03/2025 19:28, Ayan Kumar Halder wrote:
All the memory management specific registers are initialized in enable_mmu.
The title is a bit misleading (description does not help too). It's a pure code
movement, yet it's not mentioned at al
On 18.03.2025 11:45, Roger Pau Monné wrote:
> On Tue, Mar 18, 2025 at 11:14:59AM +0100, Jan Beulich wrote:
>> On 18.03.2025 09:54, Roger Pau Monné wrote:
>>> On Tue, Mar 18, 2025 at 09:36:37AM +0100, Jan Beulich wrote:
On 18.03.2025 09:29, Roger Pau Monne wrote:
> --- a/xen/drivers/passthr
On 18.03.2025 18:35, Roger Pau Monne wrote:
> mkelf32 attempt to check that the program header defined NOTE segment falls
> inside of the LOAD segment, as the build-id should be loaded for Xen at
> runtime to check.
>
> However the current code doesn't take into account the LOAD program header
> s
On 19.03.2025 10:15, Jan Beulich wrote:
> On 18.03.2025 18:01, Marek Marczykowski-Górecki wrote:
>> --- a/xen/Makefile
>> +++ b/xen/Makefile
>> @@ -411,6 +411,8 @@ ifneq ($(CONFIG_CC_IS_CLANG),y)
>> CFLAGS += -Wa,--strip-local-absolute
>> endif
>>
>> +$(call cc-option-add CFLAGS,CC,-ffile-prefi
On 19.03.2025 00:36, dm...@proton.me wrote:
> Remove trailing whitespaces in the console driver.
>
> No functional change.
>
> Signed-off-by: Denis Mukhin
Acked-by: Jan Beulich
On 19.03.2025 00:42, Denis Mukhin wrote:
> On Monday, March 17th, 2025 at 1:30 AM, Jan Beulich wrote:
>> On 15.03.2025 02:00, dm...@proton.me wrote:
>>
>>> Add new symbol APIC_VECTOR_VALID to replace open-coded value 16 in
>>> LAPIC and virtual LAPIC code.
>>
>>
>> First a good name is needed to m
On 18.03.2025 18:01, Marek Marczykowski-Górecki wrote:
> --- a/xen/Makefile
> +++ b/xen/Makefile
> @@ -411,6 +411,8 @@ ifneq ($(CONFIG_CC_IS_CLANG),y)
> CFLAGS += -Wa,--strip-local-absolute
> endif
>
> +$(call cc-option-add CFLAGS,CC,-ffile-prefix-map=$(XEN_ROOT)=.)
With this, ...
> --- a/xen
On 18.03.2025 18:01, Marek Marczykowski-Górecki wrote:
> --- a/xen/Makefile
> +++ b/xen/Makefile
> @@ -411,6 +411,8 @@ ifneq ($(CONFIG_CC_IS_CLANG),y)
> CFLAGS += -Wa,--strip-local-absolute
> endif
>
> +$(call cc-option-add CFLAGS,CC,-ffile-prefix-map=$(XEN_ROOT)=.)
This is lacking a comma:
$
On Tue, Mar 18, 2025 at 05:45:09PM +, Andrew Cooper wrote:
> On 18/03/2025 5:35 pm, Roger Pau Monne wrote:
> > Clarify that trampoline_setup is only used for EFI when booted using the
> > multiboot2 entry point.
> >
> > Signed-off-by: Roger Pau Monné
> > ---
> > xen/arch/x86/boot/head.S | 3 +
On 18/03/2025 01:35, Andrew Cooper wrote:
> On 17/03/2025 6:48 pm, Andrea Bastoni wrote:
>> Hi,
>>
>> In the last months we have been working with Stefano's team in AMD at tools
>> to
>> facilitate the analysis of "anonymous" memory allocations performed at
>> "runtime"
>> from the shared Xen hea
Hi,
On Tue, Mar 11, 2025 at 10:28 PM Julien Grall wrote:
>
> Hi,
>
> On 05/03/2025 09:11, Mykola Kvach wrote:
> > From: Mykyta Poturai
> >
> > These functions may be unimplemented, so check that they exist before
> > calling to prevent crashes.
>
> Looking at the cover letter, I see you wrote th
Hi,
On Wed, Mar 12, 2025 at 12:36 AM Julien Grall wrote:
>
> Hi,
>
> On 05/03/2025 09:11, Mykola Kvach wrote:
> > This is V1 series from Mirela Simonovic. Ported to 4.16 and with added
> > changes
> > suggested here
> > https://lore.kernel.org/all/CAKPH-NjmaZENb8gT=+fobraycrf01_--6gura2ck9di5wiu
On Tue, Mar 18, 2025 at 7:05 PM Frediano Ziglio
wrote:
>
> On Tue, Mar 18, 2025 at 5:36 PM Roger Pau Monne wrote:
> >
> > Change the order relocations are applied. Currently the trampoline is
> > patched for relocations before being copied to the low 1MB region. Change
> > the order and instead
On Wed, Mar 5, 2025 at 6:48 PM Jan Beulich wrote:
>
> On 05.03.2025 10:11, Mykola Kvach wrote:
> > From: Mirela Simonovic
> >
> > These functions will be reused by suspend/resume support for ARM.
>
> And until then they are going to violate the Misra rule requiring there
> to not be unreachable c
On 18.03.25 16:26, Jan Beulich wrote:
> On 18.03.2025 14:31, Mykyta Poturai wrote:
>> On 18.03.25 12:11, Jan Beulich wrote:
>>> On 18.03.2025 10:10, Mykyta Poturai wrote:
On 15.01.24 11:35, Jan Beulich wrote:
> On 14.01.2024 11:01, Mykyta Poturai wrote:
>> --- a/xen/include/public/hvm/
On 19.03.2025 13:12, Andrew Cooper wrote:
> On 19/03/2025 11:18 am, Jan Beulich wrote:
>> As per observation in practice, initrd->cmdline_pa is not normally zero.
>> Hence so far we always appended at least one byte. That alone may
>> already render insufficient the "allocation" made by find_memory
Hi Jan,
> On 19 Mar 2025, at 11:35, Jan Beulich wrote:
>
> On 18.03.2025 14:05, Oleksii Kurochko wrote:
>>
>> On 3/17/25 9:07 PM, Luca Fancellu wrote:
>>> From: Penny Zheng
>>>
>>> ARM MPU system doesn't need to use paging memory pool, as MPU memory
>>> mapping table at most takes only one 4KB
On Wed, Mar 19, 2025 at 11:07:33AM +0100, Jan Beulich wrote:
> On 18.03.2025 18:35, Roger Pau Monne wrote:
> > mkelf32 attempt to check that the program header defined NOTE segment falls
> > inside of the LOAD segment, as the build-id should be loaded for Xen at
> > runtime to check.
> >
> > Howev
On 05.03.25 11:11, Mykola Kvach wrote:
From: Mirela Simonovic
Introduce a separate struct for watchdog timers. It is needed to properly
implement the suspend/resume actions for the watchdog timers. To be able
to restart watchdog timer after suspend we need to remember their
frequency somewhe
On 05.03.25 11:11, Mykola Kvach wrote:
From: Mykola Kvach
The changes have been tested only on the Renesas R-Car-H3 Starter Kit board.
Signed-off-by: Volodymyr Babchuk
Signed-off-by: Oleksandr Andrushchenko
Signed-off-by: Mykola Kvach
---
xen/drivers/char/scif-uart.c | 31 +
On 19/03/2025 12:39 pm, Jan Beulich wrote:
> On 19.03.2025 13:12, Andrew Cooper wrote:
>> On 19/03/2025 11:18 am, Jan Beulich wrote:
>>> As per observation in practice, initrd->cmdline_pa is not normally zero.
>>> Hence so far we always appended at least one byte. That alone may
>>> already render
On 13.03.25 17:37, Jan Beulich wrote:
On 05.03.2025 10:11, Mykola Kvach wrote:
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -475,6 +475,17 @@ config ARM64_HARDEN_BRANCH_PREDICTOR
config ARM32_HARDEN_BRANCH_PREDICTOR
def_bool y if ARM_32 && HARDEN_BRANCH_PREDICTOR
+confi
On 3/17/25 4:24 PM, Jan Beulich wrote:
On 11.03.2025 17:19, Oleksii Kurochko wrote:
--- /dev/null
+++ b/xen/arch/riscv/time.c
@@ -0,0 +1,38 @@
+#include
+#include
+#include
+#include
+
+unsigned long __ro_after_init cpu_khz; /* CPU clock frequency in kHz. */
+unsigned long __read_mostly boo
On 19.03.2025 13:15, Roger Pau Monné wrote:
> On Wed, Mar 19, 2025 at 12:21:53PM +0100, Jan Beulich wrote:
>> If a module's length is an exact multiple of PAGE_SIZE, the 2nd argument
>> passed to set_pdx_range() would be one larger than intended. Use
>> PFN_{UP,DOWN}() there instead.
>>
>> Fixes: c
On 19.03.2025 12:58, Marek Marczykowski-Górecki wrote:
> On Wed, Mar 19, 2025 at 10:43:12AM +0100, Jan Beulich wrote:
>> On 19.03.2025 10:15, Jan Beulich wrote:
>>> On 18.03.2025 18:01, Marek Marczykowski-Górecki wrote:
--- a/xen/Makefile
+++ b/xen/Makefile
@@ -411,6 +411,8 @@ ifneq
On 19.03.2025 13:01, Mykola Kvach wrote:
> Hi,
>
> On Wed, Mar 5, 2025 at 6:45 PM Jan Beulich wrote:
>>
>> On 05.03.2025 10:11, Mykola Kvach wrote:
>>> --- a/xen/drivers/passthrough/iommu.c
>>> +++ b/xen/drivers/passthrough/iommu.c
>>> @@ -613,7 +613,7 @@ int __init iommu_setup(void)
>>>
>>> int
On Wed, Mar 19, 2025 at 12:12:22PM +, Andrew Cooper wrote:
> On 19/03/2025 11:18 am, Jan Beulich wrote:
> > As per observation in practice, initrd->cmdline_pa is not normally zero.
> > Hence so far we always appended at least one byte. That alone may
> > already render insufficient the "allocat
On 19/03/2025 8:46 am, Roger Pau Monné wrote:
> On Tue, Mar 18, 2025 at 05:45:09PM +, Andrew Cooper wrote:
>> On 18/03/2025 5:35 pm, Roger Pau Monne wrote:
>>> Clarify that trampoline_setup is only used for EFI when booted using the
>>> multiboot2 entry point.
>>>
>>> Signed-off-by: Roger Pau M
On 19.03.2025 13:03, Mykola Kvach wrote:
> On Wed, Mar 5, 2025 at 6:48 PM Jan Beulich wrote:
>>
>> On 05.03.2025 10:11, Mykola Kvach wrote:
>>> From: Mirela Simonovic
>>>
>>> These functions will be reused by suspend/resume support for ARM.
>>
>> And until then they are going to violate the Misra
On 3/19/25 12:35 PM, Jan Beulich wrote:
On 18.03.2025 14:05, Oleksii Kurochko wrote:
On 3/17/25 9:07 PM, Luca Fancellu wrote:
From: Penny Zheng
ARM MPU system doesn't need to use paging memory pool, as MPU memory
mapping table at most takes only one 4KB page, which is enough to
manage the max
On 3/19/25 06:56, Anthony PERARD wrote:
On Mon, Mar 17, 2025 at 11:34:12AM -0700, Pierrick Bouvier wrote:
Reviewed-by: Philippe Mathieu-Daudé
Signed-off-by: Pierrick Bouvier
This was a bad copy-paste, thanks.
Reviewed-by: Anthony PERARD
Thanks,
On Tue, Mar 18, 2025 at 08:10:33PM +, Andrew Cooper wrote:
> The LRET is detached from the PUSHes which set it up, and this is about to get
> worse with the changes to trampoline relocation. For the sake of one variable
> read, the complexity is not worth it.
>
> Reorder the logic to copy the
> On 19 Mar 2025, at 12:18, Luca Fancellu wrote:
>
> Hi Jan,
>
>> On 19 Mar 2025, at 11:35, Jan Beulich wrote:
>>
>> On 18.03.2025 14:05, Oleksii Kurochko wrote:
>>>
>>> On 3/17/25 9:07 PM, Luca Fancellu wrote:
From: Penny Zheng
ARM MPU system doesn't need to use paging memo
On Wed, Mar 19, 2025 at 12:21:53PM +0100, Jan Beulich wrote:
> If a module's length is an exact multiple of PAGE_SIZE, the 2nd argument
> passed to set_pdx_range() would be one larger than intended. Use
> PFN_{UP,DOWN}() there instead.
>
> Fixes: cd7cc5320bb2 ("x86/boot: add start and size fields
> On 19 Mar 2025, at 12:18, Luca Fancellu wrote:
>
> Hi Jan,
>
>> On 19 Mar 2025, at 11:35, Jan Beulich wrote:
>>
>> On 18.03.2025 14:05, Oleksii Kurochko wrote:
>>>
>>> On 3/17/25 9:07 PM, Luca Fancellu wrote:
From: Penny Zheng
ARM MPU system doesn't need to use paging memo
Hi,
On Wed, Mar 5, 2025 at 6:45 PM Jan Beulich wrote:
>
> On 05.03.2025 10:11, Mykola Kvach wrote:
> > --- a/xen/drivers/passthrough/iommu.c
> > +++ b/xen/drivers/passthrough/iommu.c
> > @@ -613,7 +613,7 @@ int __init iommu_setup(void)
> >
> > int iommu_suspend(void)
> > {
> > -if ( iommu_e
If a module's length is an exact multiple of PAGE_SIZE, the 2nd argument
passed to set_pdx_range() would be one larger than intended. Use
PFN_{UP,DOWN}() there instead.
Fixes: cd7cc5320bb2 ("x86/boot: add start and size fields to struct
boot_module")
Signed-off-by: Jan Beulich
--- a/xen/arch/x8
On 19.03.2025 13:05, Mykyta Poturai wrote:
> On 18.03.25 16:26, Jan Beulich wrote:
>> On 18.03.2025 14:31, Mykyta Poturai wrote:
>>> On 18.03.25 12:11, Jan Beulich wrote:
On 18.03.2025 10:10, Mykyta Poturai wrote:
> On 15.01.24 11:35, Jan Beulich wrote:
>> On 14.01.2024 11:01, Mykyta P
On 19.03.2025 04:03, Stefano Stabellini wrote:
> --- a/xen/common/bitmap.c
> +++ b/xen/common/bitmap.c
> @@ -384,21 +384,26 @@ int bitmap_to_xenctl_bitmap(struct xenctl_bitmap
> *xenctl_bitmap,
> uint8_t zero = 0;
> int err = 0;
> unsigned int xen_bytes = DIV_ROUND_UP(nbits, BITS_PE
On 3/17/25 8:40 PM, Andrew Cooper wrote:
On 11/03/2025 4:19 pm, Oleksii Kurochko wrote:
By default, the `aia` option is set to "none" which selects the SiFive PLIC for
handling wired interrupts. However, since PLIC is now considered obsolete and
will not be supported by Xen now, APLIC and IMSIC
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