GNU bug report logs - #69899
[PATCH 0/7] support to use `guix system vm' with riscv64.

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Package: guix-patches; Reported by: Zheng Junjie <zhengjunjie@HIDDEN>; Keywords: patch; Done: Ludovic Courtès <ludo@HIDDEN>; Maintainer for guix-patches is guix-patches@HIDDEN.

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From: Zheng Junjie <zhengjunjie@HIDDEN>
To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@HIDDEN>
Subject: Re: [bug#69899] [PATCH 0/7] support to use `guix system vm' with
 riscv64.
Date: Tue, 02 Apr 2024 01:20:12 +0800
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Ludovic Court=C3=A8s <ludo@HIDDEN> writes:

> Hi,
>
> Zheng Junjie <zhengjunjie@HIDDEN> skribis:
>
>> Leo Famulari <leo@HIDDEN> writes:
>>
>>> Hi, thanks for these patches!
>>>
>>> On Tue, Mar 19, 2024 at 11:15:53PM +0800, Zheng Junjie wrote:
>>>> hello!. this patchset make `guix system vm --target=3Driscv64-linux-gn=
u' work.
>>>> and `guix system vm --system=3Driscv64-linux` also work, But there is =
a problem
>>>> that the qemu running with --system=3Driscv64-linux is also riscv arch=
itecture,
>>>> now you have to manually modify to use native qemu or the guix of qemu=
-system
>>>> on qemu-user is too slow. and must enable qemu-binfmt.
>>>
>>> So, what should we do about the problem? What's the ideal solution for
>>> Guix? I don't have any experience with this subject matter.
>>
>> I've come up with two ideas:
>>
>> 1. Force the current system's qemu to be used, on x86_64 and -s
>> riscv64-linux, use x86_64's qemu.
>> 2. add an environment variable, GUIX_QEMU, to allow the internal qemu
>> execution to be replaced
>>
>> There may be other solutions, but I can't think of them yet.
>
> Thing is, =E2=80=98--system=3DX=E2=80=99 is supposed to be giving the exa=
ct same result as
> if you were building natively on X.  Thus, it=E2=80=99s not surprising th=
at
> =E2=80=98guix system vm --system=3DX=E2=80=99 gives on a QEMU binary buil=
t for X.
>
> Now, it=E2=80=99s admittedly not very useful in this case.  I believe the
> attached patch implements #1 (I wasn=E2=80=99t able to test it yet becaus=
e too
> many things had to be built).  How does it sound?

it works, and the following patch is required.


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 filename=0001-vm-Don-t-add-enable-kvm-when-SYSTEM-and-system-are-n.patch
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From=20e178de931859399abdd4bd3300b7ce7c5593a6e3 Mon Sep 17 00:00:00 2001
Message-ID: <e178de931859399abdd4bd3300b7ce7c5593a6e3.1712026332.git.zhengj=
unjie@HIDDEN>
From: Zheng Junjie <zhengjunjie@HIDDEN>
Date: Tue, 2 Apr 2024 00:59:54 +0800
Subject: [PATCH] vm: Don't add -enable-kvm when SYSTEM and %system are not
 same.

* gnu/system/vm.scm (common-qemu-options): Don't add -enable-kvm when SYSTEM
and %system are not same.

Change-Id: Ie6c602b297c39423a693fdc26bed1627266e5911
=2D--
 gnu/system/vm.scm | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index a2743453e7..42e9a08722 100644
=2D-- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -212,7 +212,8 @@ (define* (virtualized-operating-system os
 (define* (common-qemu-options image shared-fs
                               #:key
                               rw-image?
=2D                              (target (%current-target-system)))
+                              (target (%current-target-system))
+                              (system (%current-system)))
   "Return the a string-value gexp with the common QEMU options to boot IMA=
GE,
 with '-virtfs' options for the host file systems listed in SHARED-FS."
=20
@@ -223,7 +224,9 @@ (define* (common-qemu-options image shared-fs
   #~(;; Only enable kvm if we see /dev/kvm exists.
      ;; This allows users without hardware virtualization to still use the=
se
      ;; commands.
=2D     #$@(if (and (not target) (file-exists? "/dev/kvm"))
+     #$@(if (and (not target)
+                 (string=3D? system %system)
+                 (file-exists? "/dev/kvm"))
             '("-enable-kvm")
             '())
=20
@@ -308,7 +311,8 @@ (define* (system-qemu-image/shared-store-script os
                                       (map file-system-mapping-source
                                            (cons %store-mapping mappings))
                                       #:rw-image? (not volatile?)
=2D                                      #:target target)
+                                      #:target target
+                                      #:system system)
               "-m " (number->string #$memory-size)
               #$@options))
=20

base-commit: 9e9ec741d0dc5ce58f8d21d31800ff2cafce128f
prerequisite-patch-id: 6183d199c58355eea1a85e1f1fe51f2f5fe44f65
=2D-=20
2.41.0


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And maybe shebang interpreter also need override %CURRENT-SYSTEM?[1]
Even though when the Shebang interpreter cannot execute, the file will
be interpreted and executed by the current shell.

>
> diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
> index 7d9d07ebb7..a2743453e7 100644
> --- a/gnu/system/vm.scm
> +++ b/gnu/system/vm.scm
> @@ -287,8 +287,11 @@ (define* (system-qemu-image/shared-store-script os
>        #~(format #f "/tmp/guix-image-~a" (basename #$base-image)))
>=20=20
>      (define qemu-exec
> -      #~(list #+(file-append qemu "/bin/"
> -                             (qemu-command (or target system)))
> +      #~(list #+(with-parameters ((%current-system %system)
> +                                  (%current-target-system #f))
> +                  ;; Override %CURRENT-SYSTEM to always use a native emu=
lator.
> +                  (file-append qemu "/bin/"
> +                               (qemu-command (or target system))))
>                ;; Tells qemu to use the terminal it was started in for IO.
>                #$@(if graphic? '() #~("-nographic"))
>                #$@(if full-boot?
>
>
> Thanks,
> Ludo=E2=80=99.

[1] https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/system/vm.scm?h=3D9=
e9ec741d0dc5ce58f8d21d31800ff2cafce128f#n328

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Information forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

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From: =?utf-8?Q?Ludovic_Court=C3=A8s?= <ludo@HIDDEN>
To: Zheng Junjie <zhengjunjie@HIDDEN>
Subject: Re: [bug#69899] [PATCH 0/7] support to use `guix system vm' with
 riscv64.
In-Reply-To: <cover.1710861023.git.zhengjunjie@HIDDEN> (Zheng Junjie's
 message of "Tue, 19 Mar 2024 23:15:53 +0800")
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Date: Sun, 31 Mar 2024 23:03:20 +0200
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Hi,

Zheng Junjie <zhengjunjie@HIDDEN> skribis:

>   bootloader: Add u-boot-qemu-riscv64-bootloader.
>   vm: use #$ for kernel-arguments.
>   vm: When target riscv64-linux, use u-boot-qemu-riscv64-bootloader.
>   gnu: linux-libre-riscv64-generic: add more options.
>   linux-initrd: don't add hid-apple module for riscv64-linux.
>   vm: add arguments to use virt machine type for qemu-riscv64.
>   vm: If not the same local architecture, don't enable kvm.

Applied, thanks!

Ludo=E2=80=99.




Notification sent to Zheng Junjie <zhengjunjie@HIDDEN>:
bug acknowledged by developer. Full text available.
Reply sent to Ludovic Courtès <ludo@HIDDEN>:
You have taken responsibility. Full text available.

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To: Zheng Junjie <zhengjunjie@HIDDEN>
Subject: Re: [bug#69899] [PATCH 0/7] support to use `guix system vm' with
 riscv64.
In-Reply-To: <87ttksgheo.fsf@HIDDEN> (Zheng Junjie's message of "Wed, 27
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Hi,

Zheng Junjie <zhengjunjie@HIDDEN> skribis:

> Leo Famulari <leo@HIDDEN> writes:
>
>> Hi, thanks for these patches!
>>
>> On Tue, Mar 19, 2024 at 11:15:53PM +0800, Zheng Junjie wrote:
>>> hello!. this patchset make `guix system vm --target=3Driscv64-linux-gnu=
' work.
>>> and `guix system vm --system=3Driscv64-linux` also work, But there is a=
 problem
>>> that the qemu running with --system=3Driscv64-linux is also riscv archi=
tecture,
>>> now you have to manually modify to use native qemu or the guix of qemu-=
system
>>> on qemu-user is too slow. and must enable qemu-binfmt.
>>
>> So, what should we do about the problem? What's the ideal solution for
>> Guix? I don't have any experience with this subject matter.
>
> I've come up with two ideas:
>
> 1. Force the current system's qemu to be used, on x86_64 and -s
> riscv64-linux, use x86_64's qemu.
> 2. add an environment variable, GUIX_QEMU, to allow the internal qemu
> execution to be replaced
>
> There may be other solutions, but I can't think of them yet.

Thing is, =E2=80=98--system=3DX=E2=80=99 is supposed to be giving the exact=
 same result as
if you were building natively on X.  Thus, it=E2=80=99s not surprising that
=E2=80=98guix system vm --system=3DX=E2=80=99 gives on a QEMU binary built =
for X.

Now, it=E2=80=99s admittedly not very useful in this case.  I believe the
attached patch implements #1 (I wasn=E2=80=99t able to test it yet because =
too
many things had to be built).  How does it sound?


--=-=-=
Content-Type: text/x-patch
Content-Disposition: inline

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index 7d9d07ebb7..a2743453e7 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -287,8 +287,11 @@ (define* (system-qemu-image/shared-store-script os
       #~(format #f "/tmp/guix-image-~a" (basename #$base-image)))
 
     (define qemu-exec
-      #~(list #+(file-append qemu "/bin/"
-                             (qemu-command (or target system)))
+      #~(list #+(with-parameters ((%current-system %system)
+                                  (%current-target-system #f))
+                  ;; Override %CURRENT-SYSTEM to always use a native emulator.
+                  (file-append qemu "/bin/"
+                               (qemu-command (or target system))))
               ;; Tells qemu to use the terminal it was started in for IO.
               #$@(if graphic? '() #~("-nographic"))
               #$@(if full-boot?

--=-=-=
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: base64

DQpUaGFua3MsDQpMdWRv4oCZLg0K
--=-=-=--




Information forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

Message received at 69899 <at> debbugs.gnu.org:


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From: Zheng Junjie <zhengjunjie@HIDDEN>
To: Leo Famulari <leo@HIDDEN>
Subject: Re: [bug#69899] [PATCH 0/7] support to use `guix system vm' with
 riscv64.
Date: Wed, 27 Mar 2024 17:15:26 +0800
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--=-=-=
Content-Type: text/plain


Leo Famulari <leo@HIDDEN> writes:

> Hi, thanks for these patches!
>
> On Tue, Mar 19, 2024 at 11:15:53PM +0800, Zheng Junjie wrote:
>> hello!. this patchset make `guix system vm --target=riscv64-linux-gnu' work.
>> and `guix system vm --system=riscv64-linux` also work, But there is a problem
>> that the qemu running with --system=riscv64-linux is also riscv architecture,
>> now you have to manually modify to use native qemu or the guix of qemu-system
>> on qemu-user is too slow. and must enable qemu-binfmt.
>
> So, what should we do about the problem? What's the ideal solution for
> Guix? I don't have any experience with this subject matter.

I've come up with two ideas:

1. Force the current system's qemu to be used, on x86_64 and -s
riscv64-linux, use x86_64's qemu.
2. add an environment variable, GUIX_QEMU, to allow the internal qemu
execution to be replaced

There may be other solutions, but I can't think of them yet.

--=-=-=
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Information forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

Message received at 69899 <at> debbugs.gnu.org:


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Date: Tue, 26 Mar 2024 12:07:46 -0400
From: Leo Famulari <leo@HIDDEN>
To: Zheng Junjie <zhengjunjie@HIDDEN>
Subject: Re: [bug#69899] [PATCH 0/7] support to use `guix system vm' with
 riscv64.
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Hi, thanks for these patches!

On Tue, Mar 19, 2024 at 11:15:53PM +0800, Zheng Junjie wrote:
> hello!. this patchset make `guix system vm --target=riscv64-linux-gnu' work.
> and `guix system vm --system=riscv64-linux` also work, But there is a problem
> that the qemu running with --system=riscv64-linux is also riscv architecture,
> now you have to manually modify to use native qemu or the guix of qemu-system
> on qemu-user is too slow. and must enable qemu-binfmt.

So, what should we do about the problem? What's the ideal solution for
Guix? I don't have any experience with this subject matter.




Information forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

Message received at 69899 <at> debbugs.gnu.org:


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To: 69899 <at> debbugs.gnu.org
Subject: [PATCH 1/7] bootloader: Add u-boot-qemu-riscv64-bootloader.
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* gnu/bootloader/u-boot.scm (u-boot-qemu-riscv64-bootloader): New variable.

Change-Id: If6622838d2250c90a26380849b92387aa7122fbb
---
 gnu/bootloader/u-boot.scm | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/gnu/bootloader/u-boot.scm b/gnu/bootloader/u-boot.scm
index d20aabd538..8e7cc05191 100644
--- a/gnu/bootloader/u-boot.scm
+++ b/gnu/bootloader/u-boot.scm
@@ -6,6 +6,7 @@
 ;;; Copyright © 2022 Maxim Cournoyer <maxim.cournoyer@HIDDEN>
 ;;; Copyright © 2023 Efraim Flashner <efraim@HIDDEN>
 ;;; Copyright © 2023 Herman Rimm <herman_rimm@HIDDEN>
+;;; Copyright © 2024 Zheng Junjie <873216071@HIDDEN>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -47,6 +48,7 @@ (define-module (gnu bootloader u-boot)
             u-boot-rock64-rk3328-bootloader
             u-boot-rockpro64-rk3399-bootloader
             u-boot-sifive-unmatched-bootloader
+            u-boot-qemu-riscv64-bootloader
             u-boot-ts7970-q-2g-1000mhz-c-bootloader
             u-boot-wandboard-bootloader))
 
@@ -157,6 +159,12 @@ (define install-sifive-unmatched-u-boot
         (write-file-on-device u-boot (stat:size (stat u-boot))
                               image (* 2082 512)))))
 
+(define install-qemu-riscv64-u-boot
+  #~(lambda (bootloader device mount-point)
+      (let ((u-boot.bin (string-append bootloader "/libexec/u-boot.bin"))
+            (install-dir (string-append mount-point "/boot")))
+        (install-file u-boot.bin install-dir))))
+
 
 
 ;;;
@@ -307,3 +315,10 @@ (define u-boot-sifive-unmatched-bootloader
    (inherit u-boot-bootloader)
    (package u-boot-sifive-unmatched)
    (disk-image-installer install-sifive-unmatched-u-boot)))
+
+(define u-boot-qemu-riscv64-bootloader
+  (bootloader
+   (inherit u-boot-bootloader)
+   (package u-boot-qemu-riscv64)
+   (installer install-qemu-riscv64-u-boot)
+   (disk-image-installer #f)))
-- 
2.41.0





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From: Zheng Junjie <zhengjunjie@HIDDEN>
To: 69899 <at> debbugs.gnu.org
Subject: [PATCH 3/7] vm: When target riscv64-linux,
 use u-boot-qemu-riscv64-bootloader.
Date: Tue, 19 Mar 2024 23:18:37 +0800
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* gnu/system/vm.scm (virtualized-operating-system) When target riscv64-linux,
use u-boot-qemu-riscv64-bootloader. Add system, target keyword.

Change-Id: I22d64d00670a705e4b81427e44a83d504598b536
---
 gnu/system/vm.scm | 22 +++++++++++++++-------
 1 file changed, 15 insertions(+), 7 deletions(-)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index 40e965d272..d4044a4a39 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -52,6 +52,7 @@ (define-module (gnu system vm)
 
   #:use-module (gnu bootloader)
   #:use-module (gnu bootloader grub)
+  #:use-module (gnu bootloader u-boot)
   #:use-module (gnu image)
   #:use-module (gnu system image)
   #:use-module (gnu system linux-container)
@@ -137,7 +138,9 @@ (define (mapping->file-system mapping)
 
 (define* (virtualized-operating-system os
                                        #:optional (mappings '())
-                                       #:key (full-boot? #f) volatile?)
+                                       #:key (full-boot? #f) volatile?
+                                       (system (%current-system))
+                                       (target (%current-target-system)))
   "Return an operating system based on OS suitable for use in a virtualized
 environment with the store shared with the host.  MAPPINGS is a list of
 <file-system-mapping> to realize in the virtualized OS."
@@ -167,15 +170,18 @@ (define* (virtualized-operating-system os
           (append (map mapping->file-system mappings)
                   user-file-systems)))
 
-  (operating-system (inherit os)
-
+  (operating-system
+    (inherit os)
     ;; XXX: Until we run QEMU with UEFI support (with the OVMF firmware),
     ;; force the traditional i386/BIOS method.
     ;; See <https://bugs.gnu.org/28768>.
     (bootloader (bootloader-configuration
-                  (inherit (operating-system-bootloader os))
-                  (bootloader grub-bootloader)
-                  (targets '("/dev/vda"))))
+                 (inherit (operating-system-bootloader os))
+                 (bootloader
+                  (if (target-riscv64? (or target system))
+                      u-boot-qemu-riscv64-bootloader
+                      grub-bootloader))
+                 (targets '("/dev/vda"))))
 
     (initrd (lambda (file-systems . rest)
               (apply (operating-system-initrd os)
@@ -259,7 +265,9 @@ (define* (system-qemu-image/shared-store-script os
   (mlet* %store-monad ((os ->  (virtualized-operating-system
                                 os mappings
                                 #:full-boot? full-boot?
-                                #:volatile? volatile?))
+                                #:volatile? volatile?
+                                #:system system
+                                #:target target))
                        (base-image -> (system-image
                                        (image
                                         (inherit
-- 
2.41.0





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bug#69899; Package guix-patches. Full text available.

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To: 69899 <at> debbugs.gnu.org
Subject: [PATCH 6/7] vm: add arguments to use virt machine type for
 qemu-riscv64.
Date: Tue, 19 Mar 2024 23:18:40 +0800
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* gnu/system/vm.scm (system-qemu-image/shared-store-script): When target
riscv64, add arguments to set qemu virt machine type.

Change-Id: I974c82fdd2d5bfc01caff9e6411db38e472b5cd4
---
 gnu/system/vm.scm | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index d4044a4a39..64cc321ebf 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -295,6 +295,10 @@ (define* (system-qemu-image/shared-store-script os
                         "-initrd" #$(file-append os "/initrd")
                         (format #f "-append ~s"
                                 (string-join #$kernel-arguments " "))))
+              ;; Default qemu-riscv64 have not PCI, virt have it, so we set it.
+              #$@(if (target-riscv64? (or target system))
+                     #~("-M" "virt")
+                     #~())
               #$@(common-qemu-options (if volatile? base-image rw-image)
                                       (map file-system-mapping-source
                                            (cons %store-mapping mappings))
-- 
2.41.0





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Subject: [PATCH 4/7] gnu: linux-libre-riscv64-generic: add more options.
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This is required by `guix system vm'.

* gnu/packages/linux (linux-libre-riscv64-generic)[#:extra-options]: Add more
option.

Change-Id: I5697ba7158d44ef0ea9cf28cadb4d59f312b4206
---
 gnu/packages/linux.scm | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/linux.scm b/gnu/packages/linux.scm
index 343e8c1032..73b08fcf82 100644
--- a/gnu/packages/linux.scm
+++ b/gnu/packages/linux.scm
@@ -1312,7 +1312,24 @@ (define-public linux-libre-riscv64-generic
                      linux-libre-gnu-revision
                      linux-libre-source
                      '("riscv64-linux")
-                     #:extra-version "riscv64-generic"))
+                     #:extra-version "riscv64-generic"
+                     #:extra-options
+                     (append
+                      ;; required `guix system vm'
+                      `(("CONFIG_USB_HID" . m)
+                        ("CONFIG_HID_GEMBIRD" . m)
+                        ("CONFIG_AHCI_DWC" . m)
+                        ("CONFIG_SATA_AHCI" . m)
+                        ("CONFIG_CRYPTO_SERPENT" . m)
+                        ("CONFIG_CRYPTO_WP512" . m)
+                        ("CONFIG_USB_UAS" . m)
+                        ("CONFIG_USB_STORAGE" . m)
+                        ("CONFIG_HID_GENERIC" . m)
+                        ("CONFIG_DRM_CIRRUS_QEMU" . m)
+                        ("CONFIG_HW_RANDOM_VIRTIO" . m)
+                        ("CONFIG_VIRTIO_CONSOLE" . m)
+                        ("CONFIG_CRYPTO_XTS" . m))
+                      %default-extra-linux-options)))
 
 (define-public linux-libre-mips64el-fuloong2e
   (make-linux-libre* linux-libre-version
-- 
2.41.0





Information forwarded to leo@HIDDEN, me@HIDDEN, w@HIDDEN, guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

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To: 69899 <at> debbugs.gnu.org
Subject: [PATCH 5/7] linux-initrd: don't add hid-apple module for
 riscv64-linux.
Date: Tue, 19 Mar 2024 23:18:39 +0800
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* gnu/system/linux-initrd.scm(default-initrd-modules): when target-riscv64,
don't add hid-apple module.

Change-Id: I633468421db0cb1ebd61e0603021fa1c79038473
---
 gnu/system/linux-initrd.scm | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gnu/system/linux-initrd.scm b/gnu/system/linux-initrd.scm
index 6236d25b9d..f5d86219a8 100644
--- a/gnu/system/linux-initrd.scm
+++ b/gnu/system/linux-initrd.scm
@@ -363,7 +363,10 @@ (define* (default-initrd-modules
 
   `("ahci"                                  ;for SATA controllers
     "usb-storage" "uas"                     ;for the installation image etc.
-    "usbhid" "hid-generic" "hid-apple"      ;keyboards during early boot
+    "usbhid" "hid-generic"                  ;keyboards during early boot
+    ,@(if (target-riscv64? system)
+          '()
+          '("hid-apple"))
     "dm-crypt" "xts" "serpent_generic" "wp512" ;for encrypted root partitions
     "nls_iso8859-1"                            ;for `mkfs.fat`, et.al
     ,@(if (string-match "^(x86_64|i[3-6]86)-" system)
-- 
2.41.0





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Subject: [PATCH 7/7] vm: If not the same local architecture, don't enable kvm.
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* gnu/system/vm.scm (common-qemu-options): Add target keyword.

Change-Id: Ic9bf18cf60ac5ce623289df31ea050a22c6e604e
---
 gnu/system/vm.scm | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index 64cc321ebf..7d9d07ebb7 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -210,7 +210,9 @@ (define* (virtualized-operating-system os
                        virtual-file-systems)))))
 
 (define* (common-qemu-options image shared-fs
-                              #:key rw-image?)
+                              #:key
+                              rw-image?
+                              (target (%current-target-system)))
   "Return the a string-value gexp with the common QEMU options to boot IMAGE,
 with '-virtfs' options for the host file systems listed in SHARED-FS."
 
@@ -221,7 +223,7 @@ (define* (common-qemu-options image shared-fs
   #~(;; Only enable kvm if we see /dev/kvm exists.
      ;; This allows users without hardware virtualization to still use these
      ;; commands.
-     #$@(if (file-exists? "/dev/kvm")
+     #$@(if (and (not target) (file-exists? "/dev/kvm"))
             '("-enable-kvm")
             '())
 
@@ -302,7 +304,8 @@ (define* (system-qemu-image/shared-store-script os
               #$@(common-qemu-options (if volatile? base-image rw-image)
                                       (map file-system-mapping-source
                                            (cons %store-mapping mappings))
-                                      #:rw-image? (not volatile?))
+                                      #:rw-image? (not volatile?)
+                                      #:target target)
               "-m " (number->string #$memory-size)
               #$@options))
 
-- 
2.41.0





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Subject: [PATCH 2/7] vm: use #$ for kernel-arguments.
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Use #$ allow cross-compile to with support current system kernel.

e.g. linux-libre-riscv64-generic.

* gnu/system/vm.scm(system-qemu-image/shared-store-script)
(linux-image-startup-command): use #$ for kernel-arguments.

Change-Id: I9d2e7df296ce590b95cd30996b33f8ca692ac1b1
---
 gnu/system/vm.scm | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gnu/system/vm.scm b/gnu/system/vm.scm
index fcfd1cdb48..40e965d272 100644
--- a/gnu/system/vm.scm
+++ b/gnu/system/vm.scm
@@ -5,6 +5,7 @@
 ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@HIDDEN>
 ;;; Copyright © 2017 Marius Bakke <mbakke@HIDDEN>
 ;;; Copyright © 2018 Chris Marusich <cmmarusich@HIDDEN>
+;;; Copyright © 2024 Zheng Junjie <873216071@HIDDEN>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -270,7 +271,7 @@ (define* (system-qemu-image/shared-store-script os
                                         (volatile-root? volatile?)))))
     (define kernel-arguments
       #~(list #$@(if graphic? #~() #~("console=ttyS0"))
-              #+@(operating-system-kernel-arguments os "/dev/vda1")))
+              #$@(operating-system-kernel-arguments os "/dev/vda1")))
 
     (define rw-image
       #~(format #f "/tmp/guix-image-~a" (basename #$base-image)))
@@ -340,7 +341,7 @@ (define* (linux-image-startup-command image
 
   (define kernel-arguments
     #~(list #$@(if graphic? #~() #~("console=ttyS0"))
-            #+@(operating-system-kernel-arguments os "/dev/vda1")))
+            #$@(operating-system-kernel-arguments os "/dev/vda1")))
 
   #~`(#+(file-append qemu "/bin/"
                      (qemu-command (or target system)))
-- 
2.41.0





Information forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.

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From: Zheng Junjie <zhengjunjie@HIDDEN>
To: guix-patches@HIDDEN
Subject: [PATCH 0/7] support to use `guix system vm' with riscv64.
Date: Tue, 19 Mar 2024 23:15:53 +0800
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hello!. this patchset make `guix system vm --target=riscv64-linux-gnu' work.
and `guix system vm --system=riscv64-linux` also work, But there is a problem
that the qemu running with --system=riscv64-linux is also riscv architecture,
now you have to manually modify to use native qemu or the guix of qemu-system
on qemu-user is too slow. and must enable qemu-binfmt.

Zheng Junjie (7):
  bootloader: Add u-boot-qemu-riscv64-bootloader.
  vm: use #$ for kernel-arguments.
  vm: When target riscv64-linux, use u-boot-qemu-riscv64-bootloader.
  gnu: linux-libre-riscv64-generic: add more options.
  linux-initrd: don't add hid-apple module for riscv64-linux.
  vm: add arguments to use virt machine type for qemu-riscv64.
  vm: If not the same local architecture, don't enable kvm.

 gnu/bootloader/u-boot.scm   | 15 ++++++++++++++
 gnu/packages/linux.scm      | 19 +++++++++++++++++-
 gnu/system/linux-initrd.scm |  5 ++++-
 gnu/system/vm.scm           | 40 ++++++++++++++++++++++++++-----------
 4 files changed, 65 insertions(+), 14 deletions(-)


base-commit: 83c5e7169d3bfa23a51225a8d809a435c1f2dd6b
-- 
2.41.0





Acknowledgement sent to Zheng Junjie <zhengjunjie@HIDDEN>:
New bug report received and forwarded. Copy sent to guix-patches@HIDDEN. Full text available.
Report forwarded to guix-patches@HIDDEN:
bug#69899; Package guix-patches. Full text available.
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