Hi Arthur,
Thanks for looking into this!
The flags to compile regexec.c were:
-O3 --target=aarch64-linux-gnu -fgnu89-inline
Clang was configured with (on x86_64-linux-gnu host):
cmake -G Ninja ../llvm/llvm '-DLLVM_ENABLE_PROJECTS=clang;lld' -DCMAKE_BUILD_TYPE=Release -DLLVM_ENABLE_ASSERTIONS=True -DCMAKE_INSTALL_PREFIX=../llvm-install -DLLVM_TARGETS_TO_BUILD=AArch64
Please let me know if the above doesn’t work for you.
Regards,
--
Maxim Kuvyrkov
https://www.linaro.org
> On 29 Sep 2021, at 20:47, Arthur Eubanks <aeubanks(a)google.com> wrote:
>
> Do you know the flags passed to Clang to compile the sources? I tried compiling the preprocessed sources but ran into the below, and couldn't find the flags in any of the logs.
>
> In file included from regexec.c:93:
> In file included from ./perl.h:384:
> In file included from /home/tcwg-buildslave/workspace/tcwg_bmk_0/abe/builds/destdir/x86_64-pc-linux-gnu/aarch64-linux-gnu/libc/usr/include/sys/types.h:144:
> /home/tcwg-buildslave/workspace/tcwg_bmk_0/llvm-install/lib/clang/14.0.0/include/stddef.h:46:27: error: typedef redefinition with different types ('unsigned long' vs 'unsigned long long')
> typedef long unsigned int size_t;
> ^
> 1 error generated.
>
>
>
> And yeah just moving the code around could cause major performance regressions, I've had other patches do the same for various benchmarks, there's not much we can do about that if that's actually the root cause. If I can compile the file I can check if the optimization actually created worse IR or not.
>
>
> On Wed, Sep 29, 2021 at 5:59 AM Maxim Kuvyrkov <maxim.kuvyrkov(a)linaro.org> wrote:
> Hi Arthur,
>
> Pre-processed source is in the save-temps tarballs linked below; S_regmatch() is in regexec.i .
>
> The save-temps also have .s assembly file for before and after your patch, and the only code-gen difference is in S_reginclass() function — see the attached screenshot #1.
>
> Looking into profile of S_regmatch(), some of the extra cycles come from hot loop starting with “cbz w19,...” getting misaligned — before your patch it was starting at "2bce10", and after it starts at "2bce6c”.
>
> Maybe the added instructions in S_reginclass() pushed the loop in S_regmatch() in an unfortunate way?
>
> --
> Maxim Kuvyrkov
> https://www.linaro.org
>
>> On 27 Sep 2021, at 20:05, Arthur Eubanks <aeubanks(a)google.com> wrote:
>>
>> Could I get the source file with S_regmatch()?
>>
>> On Mon, Sep 27, 2021 at 6:07 AM Maxim Kuvyrkov <maxim.kuvyrkov(a)linaro.org> wrote:
>> Hi Arthur,
>>
>> Your patch seems to be slowing down 400.perlbench by 6% — due to slow down of its hot function S_regmatch() by 14%.
>>
>> Could you take a look if this is easily fixable, please?
>>
>> Regards,
>>
>> --
>> Maxim Kuvyrkov
>> https://www.linaro.org
>>
>> > On 24 Sep 2021, at 15:07, ci_notify(a)linaro.org wrote:
>> >
>> > After llvm commit e7249e4acf3cf9438d6d9e02edecebd5b622a4dc
>> > Author: Arthur Eubanks <aeubanks(a)google.com>
>> >
>> > [SimplifyCFG] Ignore free instructions when computing cost for folding branch to common dest
>> >
>> > the following benchmarks slowed down by more than 2%:
>> > - 400.perlbench slowed down by 6% from 9730 to 10312 perf samples
>> > - 400.perlbench:[.] S_regmatch slowed down by 14% from 3660 to 4188 perf samples
>> >
>> > Below reproducer instructions can be used to re-build both "first_bad" and "last_good" cross-toolchains used in this bisection. Naturally, the scripts will fail when triggerring benchmarking jobs if you don't have access to Linaro TCWG CI.
>> >
>> > For your convenience, we have uploaded tarballs with pre-processed source and assembly files at:
>> > - First_bad save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-…
>> > - Last_good save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-…
>> > - Baseline save-temps: https://ci.linaro.org/job/tcwg_bmk_ci_llvm-bisect-tcwg_bmk_tx1-llvm-master-…
>> >
>> > Configuration:
>> > - Benchmark: SPEC CPU2006
>> > - Toolchain: Clang + Glibc + LLVM Linker
>> > - Version: all components were built from their tip of trunk
>> > - Target: aarch64-linux-gnu
>> > - Compiler flags: -O3
>> > - Hardware: NVidia TX1 4x Cortex-A57
>> >
>> > This benchmarking CI is work-in-progress, and we welcome feedback and suggestions at linaro-toolchain(a)lists.linaro.org . In our improvement plans is to add support for SPEC CPU2017 benchmarks and provide "perf report/annotate" data behind these reports.
>
> <2021-09-29_15-44-27.png><2021-09-29_15-53-20.png>
Progress
* UM-2 [QEMU upstream maintainership]
+ Worked through my code-review backlog
+ Noticed that we never got round to making our emulated GICv3
support having redistributors in more than one contiguous region;
this prevents using more than 123 CPUs with the virt board. Sent
out a patchset which adds the necessary handling.
+ Generally trying to tie off loose ends pre-holiday :-)
-- PMM
Identified regression caused by *linux:30f349097897c115345beabeecc5e710b479ff1e*:
commit 30f349097897c115345beabeecc5e710b479ff1e
Merge: 9c566611ac5c f76c87e8c337
Author: Linus Torvalds <torvalds(a)linux-foundation.org>
Merge tag 'pm-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Results regressed to (for first_bad == 30f349097897c115345beabeecc5e710b479ff1e)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_abe stage1:
-5
# build_abe qemu:
-2
# linux_n_obj:
21782
# First few build errors in logs:
from (for last_good == 9c566611ac5cc7b45af943632f7a9b1b6a642991)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_abe stage1:
-5
# build_abe qemu:
-2
# linux_n_obj:
29893
# linux build successful:
all
This commit has regressed these CI configurations:
- tcwg_kernel/gnu-release-arm-mainline-allmodconfig
Artifacts of last_good build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a…
Artifacts of first_bad build: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a…
Even more details: https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a…
Reproduce builds:
<cut>
mkdir investigate-linux-30f349097897c115345beabeecc5e710b479ff1e
cd investigate-linux-30f349097897c115345beabeecc5e710b479ff1e
# Fetch scripts
git clone https://git.linaro.org/toolchain/jenkins-scripts
# Fetch manifests and test.sh script
mkdir -p artifacts/manifests
curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a… --fail
curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a… --fail
curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_kernel-gnu-bisect-gnu-release-arm-mainline-a… --fail
chmod +x artifacts/test.sh
# Reproduce the baseline build (build all pre-requisites)
./jenkins-scripts/tcwg_kernel-build.sh @@ artifacts/manifests/build-baseline.sh
# Save baseline build state (which is then restored in artifacts/test.sh)
mkdir -p ./bisect
rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /linux/ ./ ./bisect/baseline/
cd linux
# Reproduce first_bad build
git checkout --detach 30f349097897c115345beabeecc5e710b479ff1e
../artifacts/test.sh
# Reproduce last_good build
git checkout --detach 9c566611ac5cc7b45af943632f7a9b1b6a642991
../artifacts/test.sh
cd ..
</cut>
Full commit (up to 1000 lines):
<cut>
commit 30f349097897c115345beabeecc5e710b479ff1e
Merge: 9c566611ac5c f76c87e8c337
Author: Linus Torvalds <torvalds(a)linux-foundation.org>
Date: Wed Sep 8 16:38:25 2021 -0700
Merge tag 'pm-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull more power management updates from Rafael Wysocki:
"These are mostly ARM cpufreq driver updates, including one new
MediaTek driver that has just passed all of the reviews, with the
addition of a revert of a recent intel_pstate commit, some core
cpufreq changes and a DT-related update of the operating performance
points (OPP) support code.
Specifics:
- Add new cpufreq driver for the MediaTek MT6779 platform called
mediatek-hw along with corresponding DT bindings (Hector.Yuan).
- Add DCVS interrupt support to the qcom-cpufreq-hw driver (Thara
Gopinath).
- Make the qcom-cpufreq-hw driver set the dvfs_possible_from_any_cpu
policy flag (Taniya Das).
- Blocklist more Qualcomm platforms in cpufreq-dt-platdev (Bjorn
Andersson).
- Make the vexpress cpufreq driver set the CPUFREQ_IS_COOLING_DEV
flag (Viresh Kumar).
- Add new cpufreq driver callback to allow drivers to register with
the Energy Model in a consistent way and make several drivers use
it (Viresh Kumar).
- Change the remaining users of the .ready() cpufreq driver callback
to move the code from it elsewhere and drop it from the cpufreq
core (Viresh Kumar).
- Revert recent intel_pstate change adding HWP guaranteed performance
change notification support to it that led to problems, because the
notification in question is triggered prematurely on some systems
(Rafael Wysocki).
- Convert the OPP DT bindings to DT schema and clean them up while at
it (Rob Herring)"
* tag 'pm-5.15-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (23 commits)
Revert "cpufreq: intel_pstate: Process HWP Guaranteed change notification"
cpufreq: mediatek-hw: Add support for CPUFREQ HW
cpufreq: Add of_perf_domain_get_sharing_cpumask
dt-bindings: cpufreq: add bindings for MediaTek cpufreq HW
cpufreq: Remove ready() callback
cpufreq: sh: Remove sh_cpufreq_cpu_ready()
cpufreq: acpi: Remove acpi_cpufreq_cpu_ready()
cpufreq: qcom-hw: Set dvfs_possible_from_any_cpu cpufreq driver flag
cpufreq: blocklist more Qualcomm platforms in cpufreq-dt-platdev
cpufreq: qcom-cpufreq-hw: Add dcvs interrupt support
cpufreq: scmi: Use .register_em() to register with energy model
cpufreq: vexpress: Use .register_em() to register with energy model
cpufreq: scpi: Use .register_em() to register with energy model
dt-bindings: opp: Convert to DT schema
dt-bindings: Clean-up OPP binding node names in examples
ARM: dts: omap: Drop references to opp.txt
cpufreq: qcom-cpufreq-hw: Use .register_em() to register with energy model
cpufreq: omap: Use .register_em() to register with energy model
cpufreq: mediatek: Use .register_em() to register with energy model
cpufreq: imx6q: Use .register_em() to register with energy model
...
Documentation/cpu-freq/cpu-drivers.rst | 3 -
.../devicetree/bindings/cpufreq/cpufreq-dt.txt | 2 +-
.../bindings/cpufreq/cpufreq-mediatek-hw.yaml | 70 +++
.../bindings/cpufreq/cpufreq-mediatek.txt | 2 +-
.../devicetree/bindings/cpufreq/cpufreq-st.txt | 6 +-
.../bindings/cpufreq/nvidia,tegra20-cpufreq.txt | 2 +-
.../devicetree/bindings/devfreq/rk3399_dmc.txt | 2 +-
.../devicetree/bindings/gpu/arm,mali-bifrost.yaml | 2 +-
.../devicetree/bindings/gpu/arm,mali-midgard.yaml | 2 +-
.../bindings/interconnect/fsl,imx8m-noc.yaml | 4 +-
.../opp/allwinner,sun50i-h6-operating-points.yaml | 4 +
Documentation/devicetree/bindings/opp/opp-v1.yaml | 51 ++
.../devicetree/bindings/opp/opp-v2-base.yaml | 214 +++++++
Documentation/devicetree/bindings/opp/opp-v2.yaml | 475 ++++++++++++++++
Documentation/devicetree/bindings/opp/opp.txt | 622 ---------------------
Documentation/devicetree/bindings/opp/qcom-opp.txt | 2 +-
.../bindings/opp/ti-omap5-opp-supply.txt | 2 +-
.../devicetree/bindings/power/power-domain.yaml | 2 +-
.../translations/zh_CN/cpu-freq/cpu-drivers.rst | 2 -
arch/arm/boot/dts/omap34xx.dtsi | 1 -
arch/arm/boot/dts/omap36xx.dtsi | 1 -
drivers/base/arch_topology.c | 2 +
drivers/cpufreq/Kconfig.arm | 12 +
drivers/cpufreq/Makefile | 1 +
drivers/cpufreq/acpi-cpufreq.c | 14 +-
drivers/cpufreq/cpufreq-dt-platdev.c | 4 +
drivers/cpufreq/cpufreq-dt.c | 3 +-
drivers/cpufreq/cpufreq.c | 17 +-
drivers/cpufreq/imx6q-cpufreq.c | 2 +-
drivers/cpufreq/intel_pstate.c | 39 --
drivers/cpufreq/mediatek-cpufreq-hw.c | 308 ++++++++++
drivers/cpufreq/mediatek-cpufreq.c | 3 +-
drivers/cpufreq/omap-cpufreq.c | 2 +-
drivers/cpufreq/qcom-cpufreq-hw.c | 151 ++++-
drivers/cpufreq/scmi-cpufreq.c | 65 ++-
drivers/cpufreq/scpi-cpufreq.c | 3 +-
drivers/cpufreq/sh-cpufreq.c | 11 -
drivers/cpufreq/vexpress-spc-cpufreq.c | 25 +-
include/linux/cpufreq.h | 75 ++-
39 files changed, 1441 insertions(+), 767 deletions(-)
</cut>
Successfully identified regression in *linux* in CI configuration tcwg_kernel/llvm-release-aarch64-next-allnoconfig. So far, this commit has regressed CI configurations:
- tcwg_kernel/llvm-release-aarch64-next-allnoconfig
Culprit:
<cut>
commit 8633ef82f101c040427b57d4df7b706261420b94
Author: Javier Martinez Canillas <javierm(a)redhat.com>
Date: Fri Jun 25 15:13:59 2021 +0200
drivers/firmware: consolidate EFI framebuffer setup for all arches
The register_gop_device() function registers an "efi-framebuffer" platform
device to match against the efifb driver, to have an early framebuffer for
EFI platforms.
But there is already support to do exactly the same by the Generic System
Framebuffers (sysfb) driver. This used to be only for X86 but it has been
moved to drivers/firmware and could be reused by other architectures.
Also, besides supporting registering an "efi-framebuffer", this driver can
register a "simple-framebuffer" allowing to use the siple{fb,drm} drivers
on non-X86 EFI platforms. For example, on aarch64 these drivers can only
be used with DT and doesn't have code to register a "simple-frambuffer"
platform device when booting with EFI.
For these reasons, let's remove the register_gop_device() duplicated code
and instead move the platform specific logic that's there to sysfb driver.
Signed-off-by: Javier Martinez Canillas <javierm(a)redhat.com>
Acked-by: Borislav Petkov <bp(a)suse.de>
Acked-by: Daniel Vetter <daniel.vetter(a)ffwll.ch>
Signed-off-by: Thomas Zimmermann <tzimmermann(a)suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625131359.1804394-1-javi…
</cut>
Results regressed to (for first_bad == 8633ef82f101c040427b57d4df7b706261420b94)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
600
# First few build errors in logs:
# 00:00:38 ld.lld: error: undefined symbol: screen_info
# 00:00:38 make: *** [vmlinux] Error 1
from (for last_good == d391c58271072d0b0fad93c82018d495b2633448)
# reset_artifacts:
-10
# build_abe binutils:
-9
# build_llvm:
-5
# build_abe qemu:
-2
# linux_n_obj:
601
# linux build successful:
all
# linux boot successful:
boot
Artifacts of last_good build: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next…
Artifacts of first_bad build: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next…
Build top page/logs: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next…
Configuration details:
rr[linux_git]="https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git#ff11764…"
Reproduce builds:
<cut>
mkdir investigate-linux-8633ef82f101c040427b57d4df7b706261420b94
cd investigate-linux-8633ef82f101c040427b57d4df7b706261420b94
git clone https://git.linaro.org/toolchain/jenkins-scripts
mkdir -p artifacts/manifests
curl -o artifacts/manifests/build-baseline.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next… --fail
curl -o artifacts/manifests/build-parameters.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next… --fail
curl -o artifacts/test.sh https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next… --fail
chmod +x artifacts/test.sh
# Reproduce the baseline build (build all pre-requisites)
./jenkins-scripts/tcwg_kernel-build.sh @@ artifacts/manifests/build-baseline.sh
# Save baseline build state (which is then restored in artifacts/test.sh)
mkdir -p ./bisect
rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /linux/ ./ ./bisect/baseline/
cd linux
# Reproduce first_bad build
git checkout --detach 8633ef82f101c040427b57d4df7b706261420b94
../artifacts/test.sh
# Reproduce last_good build
git checkout --detach d391c58271072d0b0fad93c82018d495b2633448
../artifacts/test.sh
cd ..
</cut>
History of pending regressions and results: https://git.linaro.org/toolchain/ci/base-artifacts.git/log/?h=linaro-local/…
Artifacts: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next…
Build log: https://ci.linaro.org/job/tcwg_kernel-llvm-bisect-llvm-release-aarch64-next…
Full commit (up to 1000 lines):
<cut>
commit 8633ef82f101c040427b57d4df7b706261420b94
Author: Javier Martinez Canillas <javierm(a)redhat.com>
Date: Fri Jun 25 15:13:59 2021 +0200
drivers/firmware: consolidate EFI framebuffer setup for all arches
The register_gop_device() function registers an "efi-framebuffer" platform
device to match against the efifb driver, to have an early framebuffer for
EFI platforms.
But there is already support to do exactly the same by the Generic System
Framebuffers (sysfb) driver. This used to be only for X86 but it has been
moved to drivers/firmware and could be reused by other architectures.
Also, besides supporting registering an "efi-framebuffer", this driver can
register a "simple-framebuffer" allowing to use the siple{fb,drm} drivers
on non-X86 EFI platforms. For example, on aarch64 these drivers can only
be used with DT and doesn't have code to register a "simple-frambuffer"
platform device when booting with EFI.
For these reasons, let's remove the register_gop_device() duplicated code
and instead move the platform specific logic that's there to sysfb driver.
Signed-off-by: Javier Martinez Canillas <javierm(a)redhat.com>
Acked-by: Borislav Petkov <bp(a)suse.de>
Acked-by: Daniel Vetter <daniel.vetter(a)ffwll.ch>
Signed-off-by: Thomas Zimmermann <tzimmermann(a)suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20210625131359.1804394-1-javi…
---
arch/arm/include/asm/efi.h | 5 +--
arch/arm64/include/asm/efi.h | 5 +--
arch/riscv/include/asm/efi.h | 5 +--
drivers/firmware/Kconfig | 8 ++--
drivers/firmware/Makefile | 2 +-
drivers/firmware/efi/efi-init.c | 90 ---------------------------------------
drivers/firmware/efi/sysfb_efi.c | 76 ++++++++++++++++++++++++++++++++-
drivers/firmware/sysfb.c | 35 ++++++++++-----
drivers/firmware/sysfb_simplefb.c | 31 ++++++++++----
drivers/gpu/drm/tiny/Kconfig | 4 +-
include/linux/sysfb.h | 26 +++++------
11 files changed, 143 insertions(+), 144 deletions(-)
diff --git a/arch/arm/include/asm/efi.h b/arch/arm/include/asm/efi.h
index 9de7ab2ce05d..a6f3b179e8a9 100644
--- a/arch/arm/include/asm/efi.h
+++ b/arch/arm/include/asm/efi.h
@@ -17,6 +17,7 @@
#ifdef CONFIG_EFI
void efi_init(void);
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
@@ -52,10 +53,6 @@ void efi_virtmap_unload(void);
struct screen_info *alloc_screen_info(void);
void free_screen_info(struct screen_info *si);
-static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
-{
-}
-
/*
* A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
* so we will reserve that amount of memory. We have no easy way to tell what
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index 3578aba9c608..42d673a011c8 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -14,6 +14,7 @@
#ifdef CONFIG_EFI
extern void efi_init(void);
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
#else
#define efi_init()
#endif
@@ -85,10 +86,6 @@ static inline void free_screen_info(struct screen_info *si)
{
}
-static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
-{
-}
-
#define EFI_ALLOC_ALIGN SZ_64K
/*
diff --git a/arch/riscv/include/asm/efi.h b/arch/riscv/include/asm/efi.h
index 6d98cd999680..7a8f0d45b13a 100644
--- a/arch/riscv/include/asm/efi.h
+++ b/arch/riscv/include/asm/efi.h
@@ -13,6 +13,7 @@
#ifdef CONFIG_EFI
extern void efi_init(void);
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
#else
#define efi_init()
#endif
@@ -39,10 +40,6 @@ static inline void free_screen_info(struct screen_info *si)
{
}
-static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
-{
-}
-
void efi_virtmap_load(void);
void efi_virtmap_unload(void);
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig
index 71f3d97f0c39..af6719cc576b 100644
--- a/drivers/firmware/Kconfig
+++ b/drivers/firmware/Kconfig
@@ -254,9 +254,9 @@ config QCOM_SCM_DOWNLOAD_MODE_DEFAULT
config SYSFB
bool
default y
- depends on X86 || COMPILE_TEST
+ depends on X86 || ARM || ARM64 || RISCV || COMPILE_TEST
-config X86_SYSFB
+config SYSFB_SIMPLEFB
bool "Mark VGA/VBE/EFI FB as generic system framebuffer"
depends on SYSFB
help
@@ -264,10 +264,10 @@ config X86_SYSFB
bootloader or kernel can show basic video-output during boot for
user-guidance and debugging. Historically, x86 used the VESA BIOS
Extensions and EFI-framebuffers for this, which are mostly limited
- to x86.
+ to x86 BIOS or EFI systems.
This option, if enabled, marks VGA/VBE/EFI framebuffers as generic
framebuffers so the new generic system-framebuffer drivers can be
- used on x86. If the framebuffer is not compatible with the generic
+ used instead. If the framebuffer is not compatible with the generic
modes, it is advertised as fallback platform framebuffer so legacy
drivers like efifb, vesafb and uvesafb can pick it up.
If this option is not selected, all system framebuffers are always
diff --git a/drivers/firmware/Makefile b/drivers/firmware/Makefile
index ad78f78ffa8d..6ac637e422b9 100644
--- a/drivers/firmware/Makefile
+++ b/drivers/firmware/Makefile
@@ -19,7 +19,7 @@ obj-$(CONFIG_RASPBERRYPI_FIRMWARE) += raspberrypi.o
obj-$(CONFIG_FW_CFG_SYSFS) += qemu_fw_cfg.o
obj-$(CONFIG_QCOM_SCM) += qcom_scm.o qcom_scm-smc.o qcom_scm-legacy.o
obj-$(CONFIG_SYSFB) += sysfb.o
-obj-$(CONFIG_X86_SYSFB) += sysfb_simplefb.o
+obj-$(CONFIG_SYSFB_SIMPLEFB) += sysfb_simplefb.o
obj-$(CONFIG_TI_SCI_PROTOCOL) += ti_sci.o
obj-$(CONFIG_TRUSTED_FOUNDATIONS) += trusted_foundations.o
obj-$(CONFIG_TURRIS_MOX_RWTM) += turris-mox-rwtm.o
diff --git a/drivers/firmware/efi/efi-init.c b/drivers/firmware/efi/efi-init.c
index a552a08a1741..b19ce1a83f91 100644
--- a/drivers/firmware/efi/efi-init.c
+++ b/drivers/firmware/efi/efi-init.c
@@ -275,93 +275,3 @@ void __init efi_init(void)
}
#endif
}
-
-static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
-{
- u64 fb_base = screen_info.lfb_base;
-
- if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
- fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
-
- return fb_base >= range->cpu_addr &&
- fb_base < (range->cpu_addr + range->size);
-}
-
-static struct device_node *find_pci_overlap_node(void)
-{
- struct device_node *np;
-
- for_each_node_by_type(np, "pci") {
- struct of_pci_range_parser parser;
- struct of_pci_range range;
- int err;
-
- err = of_pci_range_parser_init(&parser, np);
- if (err) {
- pr_warn("of_pci_range_parser_init() failed: %d\n", err);
- continue;
- }
-
- for_each_of_pci_range(&parser, &range)
- if (efifb_overlaps_pci_range(&range))
- return np;
- }
- return NULL;
-}
-
-/*
- * If the efifb framebuffer is backed by a PCI graphics controller, we have
- * to ensure that this relation is expressed using a device link when
- * running in DT mode, or the probe order may be reversed, resulting in a
- * resource reservation conflict on the memory window that the efifb
- * framebuffer steals from the PCIe host bridge.
- */
-static int efifb_add_links(struct fwnode_handle *fwnode)
-{
- struct device_node *sup_np;
-
- sup_np = find_pci_overlap_node();
-
- /*
- * If there's no PCI graphics controller backing the efifb, we are
- * done here.
- */
- if (!sup_np)
- return 0;
-
- fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
- of_node_put(sup_np);
-
- return 0;
-}
-
-static const struct fwnode_operations efifb_fwnode_ops = {
- .add_links = efifb_add_links,
-};
-
-static struct fwnode_handle efifb_fwnode;
-
-static int __init register_gop_device(void)
-{
- struct platform_device *pd;
- int err;
-
- if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
- return 0;
-
- pd = platform_device_alloc("efi-framebuffer", 0);
- if (!pd)
- return -ENOMEM;
-
- if (IS_ENABLED(CONFIG_PCI)) {
- fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
- pd->dev.fwnode = &efifb_fwnode;
- }
-
- err = platform_device_add_data(pd, &screen_info, sizeof(screen_info));
- if (err)
- return err;
-
- return platform_device_add(pd);
-}
-subsys_initcall(register_gop_device);
diff --git a/drivers/firmware/efi/sysfb_efi.c b/drivers/firmware/efi/sysfb_efi.c
index 9f035b15501c..f51865e1b876 100644
--- a/drivers/firmware/efi/sysfb_efi.c
+++ b/drivers/firmware/efi/sysfb_efi.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Generic System Framebuffers on x86
+ * Generic System Framebuffers
* Copyright (c) 2012-2013 David Herrmann <dh.herrmann(a)gmail.com>
*
* EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli(a)dark-green.com>
@@ -19,7 +19,9 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
+#include <linux/of_address.h>
#include <linux/pci.h>
+#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/sysfb.h>
#include <video/vga.h>
@@ -267,7 +269,72 @@ static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
{},
};
-__init void sysfb_apply_efi_quirks(void)
+static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
+{
+ u64 fb_base = screen_info.lfb_base;
+
+ if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
+ fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
+
+ return fb_base >= range->cpu_addr &&
+ fb_base < (range->cpu_addr + range->size);
+}
+
+static struct device_node *find_pci_overlap_node(void)
+{
+ struct device_node *np;
+
+ for_each_node_by_type(np, "pci") {
+ struct of_pci_range_parser parser;
+ struct of_pci_range range;
+ int err;
+
+ err = of_pci_range_parser_init(&parser, np);
+ if (err) {
+ pr_warn("of_pci_range_parser_init() failed: %d\n", err);
+ continue;
+ }
+
+ for_each_of_pci_range(&parser, &range)
+ if (efifb_overlaps_pci_range(&range))
+ return np;
+ }
+ return NULL;
+}
+
+/*
+ * If the efifb framebuffer is backed by a PCI graphics controller, we have
+ * to ensure that this relation is expressed using a device link when
+ * running in DT mode, or the probe order may be reversed, resulting in a
+ * resource reservation conflict on the memory window that the efifb
+ * framebuffer steals from the PCIe host bridge.
+ */
+static int efifb_add_links(struct fwnode_handle *fwnode)
+{
+ struct device_node *sup_np;
+
+ sup_np = find_pci_overlap_node();
+
+ /*
+ * If there's no PCI graphics controller backing the efifb, we are
+ * done here.
+ */
+ if (!sup_np)
+ return 0;
+
+ fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
+ of_node_put(sup_np);
+
+ return 0;
+}
+
+static const struct fwnode_operations efifb_fwnode_ops = {
+ .add_links = efifb_add_links,
+};
+
+static struct fwnode_handle efifb_fwnode;
+
+__init void sysfb_apply_efi_quirks(struct platform_device *pd)
{
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
!(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
@@ -281,4 +348,9 @@ __init void sysfb_apply_efi_quirks(void)
screen_info.lfb_height = temp;
screen_info.lfb_linelength = 4 * screen_info.lfb_width;
}
+
+ if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
+ fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
+ pd->dev.fwnode = &efifb_fwnode;
+ }
}
diff --git a/drivers/firmware/sysfb.c b/drivers/firmware/sysfb.c
index 1337515963d5..2bfbb05f7d89 100644
--- a/drivers/firmware/sysfb.c
+++ b/drivers/firmware/sysfb.c
@@ -1,11 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Generic System Framebuffers on x86
+ * Generic System Framebuffers
* Copyright (c) 2012-2013 David Herrmann <dh.herrmann(a)gmail.com>
*/
/*
- * Simple-Framebuffer support for x86 systems
+ * Simple-Framebuffer support
* Create a platform-device for any available boot framebuffer. The
* simple-framebuffer platform device is already available on DT systems, so
* this module parses the global "screen_info" object and creates a suitable
@@ -16,12 +16,12 @@
* to pick these devices up without messing with simple-framebuffer drivers.
* The global "screen_info" is still valid at all times.
*
- * If CONFIG_X86_SYSFB is not selected, we never register "simple-framebuffer"
+ * If CONFIG_SYSFB_SIMPLEFB is not selected, never register "simple-framebuffer"
* platform devices, but only use legacy framebuffer devices for
* backwards compatibility.
*
* TODO: We set the dev_id field of all platform-devices to 0. This allows
- * other x86 OF/DT parsers to create such devices, too. However, they must
+ * other OF/DT parsers to create such devices, too. However, they must
* start at offset 1 for this to work.
*/
@@ -43,12 +43,10 @@ static __init int sysfb_init(void)
bool compatible;
int ret;
- sysfb_apply_efi_quirks();
-
/* try to create a simple-framebuffer device */
- compatible = parse_mode(si, &mode);
+ compatible = sysfb_parse_mode(si, &mode);
if (compatible) {
- ret = create_simplefb(si, &mode);
+ ret = sysfb_create_simplefb(si, &mode);
if (!ret)
return 0;
}
@@ -61,9 +59,24 @@ static __init int sysfb_init(void)
else
name = "platform-framebuffer";
- pd = platform_device_register_resndata(NULL, name, 0,
- NULL, 0, si, sizeof(*si));
- return PTR_ERR_OR_ZERO(pd);
+ pd = platform_device_alloc(name, 0);
+ if (!pd)
+ return -ENOMEM;
+
+ sysfb_apply_efi_quirks(pd);
+
+ ret = platform_device_add_data(pd, si, sizeof(*si));
+ if (ret)
+ goto err;
+
+ ret = platform_device_add(pd);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ platform_device_put(pd);
+ return ret;
}
/* must execute after PCI subsystem for EFI quirks */
diff --git a/drivers/firmware/sysfb_simplefb.c b/drivers/firmware/sysfb_simplefb.c
index df892444ea17..b86761904949 100644
--- a/drivers/firmware/sysfb_simplefb.c
+++ b/drivers/firmware/sysfb_simplefb.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * Generic System Framebuffers on x86
+ * Generic System Framebuffers
* Copyright (c) 2012-2013 David Herrmann <dh.herrmann(a)gmail.com>
*/
@@ -23,9 +23,9 @@
static const char simplefb_resname[] = "BOOTFB";
static const struct simplefb_format formats[] = SIMPLEFB_FORMATS;
-/* try parsing x86 screen_info into a simple-framebuffer mode struct */
-__init bool parse_mode(const struct screen_info *si,
- struct simplefb_platform_data *mode)
+/* try parsing screen_info into a simple-framebuffer mode struct */
+__init bool sysfb_parse_mode(const struct screen_info *si,
+ struct simplefb_platform_data *mode)
{
const struct simplefb_format *f;
__u8 type;
@@ -57,13 +57,14 @@ __init bool parse_mode(const struct screen_info *si,
return false;
}
-__init int create_simplefb(const struct screen_info *si,
- const struct simplefb_platform_data *mode)
+__init int sysfb_create_simplefb(const struct screen_info *si,
+ const struct simplefb_platform_data *mode)
{
struct platform_device *pd;
struct resource res;
u64 base, size;
u32 length;
+ int ret;
/*
* If the 64BIT_BASE capability is set, ext_lfb_base will contain the
@@ -105,7 +106,19 @@ __init int create_simplefb(const struct screen_info *si,
if (res.end <= res.start)
return -EINVAL;
- pd = platform_device_register_resndata(NULL, "simple-framebuffer", 0,
- &res, 1, mode, sizeof(*mode));
- return PTR_ERR_OR_ZERO(pd);
+ pd = platform_device_alloc("simple-framebuffer", 0);
+ if (!pd)
+ return -ENOMEM;
+
+ sysfb_apply_efi_quirks(pd);
+
+ ret = platform_device_add_resources(pd, &res, 1);
+ if (ret)
+ return ret;
+
+ ret = platform_device_add_data(pd, mode, sizeof(*mode));
+ if (ret)
+ return ret;
+
+ return platform_device_add(pd);
}
diff --git a/drivers/gpu/drm/tiny/Kconfig b/drivers/gpu/drm/tiny/Kconfig
index 5593128eeff9..d31be274a2bd 100644
--- a/drivers/gpu/drm/tiny/Kconfig
+++ b/drivers/gpu/drm/tiny/Kconfig
@@ -64,8 +64,8 @@ config DRM_SIMPLEDRM
buffer, size, and display format must be provided via device tree,
UEFI, VESA, etc.
- On x86 and compatible, you should also select CONFIG_X86_SYSFB to
- use UEFI and VESA framebuffers.
+ On x86 BIOS or UEFI systems, you should also select SYSFB_SIMPLEFB
+ to use UEFI and VESA framebuffers.
config TINYDRM_HX8357D
tristate "DRM support for HX8357D display panels"
diff --git a/include/linux/sysfb.h b/include/linux/sysfb.h
index 3e5355769dc3..b0dcfa26d07b 100644
--- a/include/linux/sysfb.h
+++ b/include/linux/sysfb.h
@@ -58,37 +58,37 @@ struct efifb_dmi_info {
#ifdef CONFIG_EFI
extern struct efifb_dmi_info efifb_dmi_list[];
-void sysfb_apply_efi_quirks(void);
+void sysfb_apply_efi_quirks(struct platform_device *pd);
#else /* CONFIG_EFI */
-static inline void sysfb_apply_efi_quirks(void)
+static inline void sysfb_apply_efi_quirks(struct platform_device *pd)
{
}
#endif /* CONFIG_EFI */
-#ifdef CONFIG_X86_SYSFB
+#ifdef CONFIG_SYSFB_SIMPLEFB
-bool parse_mode(const struct screen_info *si,
- struct simplefb_platform_data *mode);
-int create_simplefb(const struct screen_info *si,
- const struct simplefb_platform_data *mode);
+bool sysfb_parse_mode(const struct screen_info *si,
+ struct simplefb_platform_data *mode);
+int sysfb_create_simplefb(const struct screen_info *si,
+ const struct simplefb_platform_data *mode);
-#else /* CONFIG_X86_SYSFB */
+#else /* CONFIG_SYSFB_SIMPLE */
-static inline bool parse_mode(const struct screen_info *si,
- struct simplefb_platform_data *mode)
+static inline bool sysfb_parse_mode(const struct screen_info *si,
+ struct simplefb_platform_data *mode)
{
return false;
}
-static inline int create_simplefb(const struct screen_info *si,
- const struct simplefb_platform_data *mode)
+static inline int sysfb_create_simplefb(const struct screen_info *si,
+ const struct simplefb_platform_data *mode)
{
return -EINVAL;
}
-#endif /* CONFIG_X86_SYSFB */
+#endif /* CONFIG_SYSFB_SIMPLE */
#endif /* _LINUX_SYSFB_H */
</cut>