* [PATCH AUTOSEL 5.9 02/39] arm64: dts: rockchip: Remove system-power-controller from pmic on Odroid Go Advance
[not found] <20201203132834.930999-1-sashal@kernel.org>
@ 2020-12-03 13:27 ` Sasha Levin
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 04/39] arm64: dts: rockchip: Assign a fixed index to mmc devices on rk3399 boards Sasha Levin
` (7 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:27 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, devicetree, Heiko Stuebner, linux-rockchip,
linux-arm-kernel, Maciej Matuszczyk
From: Maciej Matuszczyk <maccraft123mc@gmail.com>
[ Upstream commit 01fe332800d0d2f94337b45c1973f4cf28ae6195 ]
This fixes a poweroff issue when this is supposed to happen
via PSCI.
Signed-off-by: Maciej Matuszczyk <maccraft123mc@gmail.com>
Link: https://lore.kernel.org/r/20201023181629.119727-1-maccraft123mc@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts | 1 -
1 file changed, 1 deletion(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
index 35bd6b904b9c7..3376810385193 100644
--- a/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3326-odroid-go2.dts
@@ -243,7 +243,6 @@ rk817: pmic@20 {
interrupts = <RK_PB2 IRQ_TYPE_LEVEL_LOW>;
pinctrl-names = "default";
pinctrl-0 = <&pmic_int>;
- rockchip,system-power-controller;
wakeup-source;
#clock-cells = <1>;
clock-output-names = "rk808-clkout1", "xin32k";
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 04/39] arm64: dts: rockchip: Assign a fixed index to mmc devices on rk3399 boards.
[not found] <20201203132834.930999-1-sashal@kernel.org>
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 02/39] arm64: dts: rockchip: Remove system-power-controller from pmic on Odroid Go Advance Sasha Levin
@ 2020-12-03 13:27 ` Sasha Levin
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 05/39] arm64: dts: rockchip: Reorder LED triggers from mmc devices on rk3399-roc-pc Sasha Levin
` (6 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:27 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, devicetree, Heiko Stuebner, Douglas Anderson,
Markus Reichl, linux-rockchip, linux-arm-kernel
From: Markus Reichl <m.reichl@fivetechno.de>
[ Upstream commit 0011c6d182774fc781fb9e115ebe8baa356029ae ]
Recently introduced async probe on mmc devices can shuffle block IDs.
Pin them to fixed values to ease booting in environments where UUIDs
are not practical. Use newly introduced aliases for mmcblk devices from [1].
[1]
https://patchwork.kernel.org/patch/11747669/
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Link: https://lore.kernel.org/r/20201104162356.1251-1-m.reichl@fivetechno.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/rockchip/rk3399.dtsi | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
index ada724b12f014..7a9a7aca86c6a 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
@@ -29,6 +29,9 @@ aliases {
i2c6 = &i2c6;
i2c7 = &i2c7;
i2c8 = &i2c8;
+ mmc0 = &sdio0;
+ mmc1 = &sdmmc;
+ mmc2 = &sdhci;
serial0 = &uart0;
serial1 = &uart1;
serial2 = &uart2;
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 05/39] arm64: dts: rockchip: Reorder LED triggers from mmc devices on rk3399-roc-pc.
[not found] <20201203132834.930999-1-sashal@kernel.org>
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 02/39] arm64: dts: rockchip: Remove system-power-controller from pmic on Odroid Go Advance Sasha Levin
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 04/39] arm64: dts: rockchip: Assign a fixed index to mmc devices on rk3399 boards Sasha Levin
@ 2020-12-03 13:27 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 10/39] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges Sasha Levin
` (5 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:27 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, devicetree, Heiko Stuebner, Markus Reichl,
linux-rockchip, linux-arm-kernel
From: Markus Reichl <m.reichl@fivetechno.de>
[ Upstream commit 7327c8b98e2e14c47021eea14d1ab268086a6408 ]
After patch [1] SD-card becomes mmc1 and eMMC becomes mmc2.
Correct trigger of LEDs accordingly.
[1]
https://patchwork.kernel.org/patch/11881427
Signed-off-by: Markus Reichl <m.reichl@fivetechno.de>
Link: https://lore.kernel.org/r/20201104192933.1001-1-m.reichl@fivetechno.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
index b85ec31cd2835..78ef0037ad4b5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3399-roc-pc.dtsi
@@ -74,14 +74,14 @@ diy_led: led-1 {
label = "red:diy";
gpios = <&gpio0 RK_PB5 GPIO_ACTIVE_HIGH>;
default-state = "off";
- linux,default-trigger = "mmc1";
+ linux,default-trigger = "mmc2";
};
yellow_led: led-2 {
label = "yellow:yellow-led";
gpios = <&gpio0 RK_PA2 GPIO_ACTIVE_HIGH>;
default-state = "off";
- linux,default-trigger = "mmc0";
+ linux,default-trigger = "mmc1";
};
};
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 10/39] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (2 preceding siblings ...)
2020-12-03 13:27 ` [PATCH AUTOSEL 5.9 05/39] arm64: dts: rockchip: Reorder LED triggers from mmc devices on rk3399-roc-pc Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 13/39] scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE Sasha Levin
` (4 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, devicetree, Florian Fainelli, Arnd Bergmann,
Zhen Lei, linux-arm-kernel
From: Zhen Lei <thunder.leizhen@huawei.com>
[ Upstream commit 2013a4b684b6eb614ee5c9a3c07b0ae6f5ca96d9 ]
The scripts/dtc/checks.c requires that the node have empty "dma-ranges"
property must have the same "#address-cells" and "#size-cells" values as
the parent node. Otherwise, the following warnings is reported:
arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi:7.3-14: Warning \
(dma_ranges_format): /usb:dma-ranges: empty "dma-ranges" property but \
its #address-cells (1) differs from / (2)
arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi:7.3-14: Warning \
(dma_ranges_format): /usb:dma-ranges: empty "dma-ranges" property but \
its #size-cells (1) differs from / (2)
Arnd Bergmann figured out why it's necessary:
Also note that the #address-cells=<1> means that any device under
this bus is assumed to only support 32-bit addressing, and DMA will
have to go through a slow swiotlb in the absence of an IOMMU.
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Link: https://lore.kernel.org/r/20201016090833.1892-2-thunder.leizhen@huawei.com'
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../dts/broadcom/stingray/stingray-usb.dtsi | 20 +++++++++----------
1 file changed, 10 insertions(+), 10 deletions(-)
diff --git a/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi b/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
index 55259f973b5a9..aef8f2b00778d 100644
--- a/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
+++ b/arch/arm64/boot/dts/broadcom/stingray/stingray-usb.dtsi
@@ -5,20 +5,20 @@
usb {
compatible = "simple-bus";
dma-ranges;
- #address-cells = <1>;
- #size-cells = <1>;
- ranges = <0x0 0x0 0x68500000 0x00400000>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges = <0x0 0x0 0x0 0x68500000 0x0 0x00400000>;
usbphy0: usb-phy@0 {
compatible = "brcm,sr-usb-combo-phy";
- reg = <0x00000000 0x100>;
+ reg = <0x0 0x00000000 0x0 0x100>;
#phy-cells = <1>;
status = "disabled";
};
xhci0: usb@1000 {
compatible = "generic-xhci";
- reg = <0x00001000 0x1000>;
+ reg = <0x0 0x00001000 0x0 0x1000>;
interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>;
phys = <&usbphy0 1>, <&usbphy0 0>;
phy-names = "phy0", "phy1";
@@ -28,7 +28,7 @@ xhci0: usb@1000 {
bdc0: usb@2000 {
compatible = "brcm,bdc-v0.16";
- reg = <0x00002000 0x1000>;
+ reg = <0x0 0x00002000 0x0 0x1000>;
interrupts = <GIC_SPI 259 IRQ_TYPE_LEVEL_HIGH>;
phys = <&usbphy0 0>, <&usbphy0 1>;
phy-names = "phy0", "phy1";
@@ -38,21 +38,21 @@ bdc0: usb@2000 {
usbphy1: usb-phy@10000 {
compatible = "brcm,sr-usb-combo-phy";
- reg = <0x00010000 0x100>;
+ reg = <0x0 0x00010000 0x0 0x100>;
#phy-cells = <1>;
status = "disabled";
};
usbphy2: usb-phy@20000 {
compatible = "brcm,sr-usb-hs-phy";
- reg = <0x00020000 0x100>;
+ reg = <0x0 0x00020000 0x0 0x100>;
#phy-cells = <0>;
status = "disabled";
};
xhci1: usb@11000 {
compatible = "generic-xhci";
- reg = <0x00011000 0x1000>;
+ reg = <0x0 0x00011000 0x0 0x1000>;
interrupts = <GIC_SPI 263 IRQ_TYPE_LEVEL_HIGH>;
phys = <&usbphy1 1>, <&usbphy2>, <&usbphy1 0>;
phy-names = "phy0", "phy1", "phy2";
@@ -62,7 +62,7 @@ xhci1: usb@11000 {
bdc1: usb@21000 {
compatible = "brcm,bdc-v0.16";
- reg = <0x00021000 0x1000>;
+ reg = <0x0 0x00021000 0x0 0x1000>;
interrupts = <GIC_SPI 266 IRQ_TYPE_LEVEL_HIGH>;
phys = <&usbphy2>;
phy-names = "phy0";
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 13/39] scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (3 preceding siblings ...)
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 10/39] arm64: dts: broadcom: clear the warnings caused by empty dma-ranges Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 20/39] drm/exynos: depend on COMMON_CLK to fix compile tests Sasha Levin
` (3 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, linux-scsi, Martin K . Petersen, Can Guo,
linux-mediatek, Stanley Chu, linux-arm-kernel
From: Can Guo <cang@codeaurora.org>
[ Upstream commit 73cc291c270248567245f084dcdf5078069af6b5 ]
If someone plays with the UFS clk scaling devfreq governor through sysfs,
ufshcd_devfreq_scale may be called even when HBA is not runtime ACTIVE.
This can lead to unexpected error. We cannot just protect it by calling
pm_runtime_get_sync() because that may cause a race condition since HBA
runtime suspend ops need to suspend clk scaling. To fix this call
pm_runtime_get_noresume() and check HBA's runtime status. Only proceed if
HBA is runtime ACTIVE, otherwise just bail.
governor_store
devfreq_performance_handler
update_devfreq
devfreq_set_target
ufshcd_devfreq_target
ufshcd_devfreq_scale
Link: https://lore.kernel.org/r/1600758548-28576-1-git-send-email-cang@codeaurora.org
Reviewed-by: Stanley Chu <stanley.chu@mediatek.com>
Signed-off-by: Can Guo <cang@codeaurora.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/ufs/ufshcd.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c
index cbcdd79a1f76f..18326eb772aeb 100644
--- a/drivers/scsi/ufs/ufshcd.c
+++ b/drivers/scsi/ufs/ufshcd.c
@@ -1279,8 +1279,15 @@ static int ufshcd_devfreq_target(struct device *dev,
}
spin_unlock_irqrestore(hba->host->host_lock, irq_flags);
+ pm_runtime_get_noresume(hba->dev);
+ if (!pm_runtime_active(hba->dev)) {
+ pm_runtime_put_noidle(hba->dev);
+ ret = -EAGAIN;
+ goto out;
+ }
start = ktime_get();
ret = ufshcd_devfreq_scale(hba, scale_up);
+ pm_runtime_put(hba->dev);
trace_ufshcd_profile_clk_scaling(dev_name(hba->dev),
(scale_up ? "up" : "down"),
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 20/39] drm/exynos: depend on COMMON_CLK to fix compile tests
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (4 preceding siblings ...)
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 13/39] scsi: ufs: Make sure clk scaling happens only when HBA is runtime ACTIVE Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 22/39] arm-smmu-qcom: Ensure the qcom_scm driver has finished probing Sasha Levin
` (2 subsequent siblings)
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Sasha Levin, linux-samsung-soc, kernel test robot, dri-devel,
Inki Dae, Krzysztof Kozlowski, linux-arm-kernel
From: Krzysztof Kozlowski <krzk@kernel.org>
[ Upstream commit e2d3d2e904ad3d381753798dcd5cae03e3c47242 ]
The Exynos DRM uses Common Clock Framework thus it cannot be built on
platforms without it (e.g. compile test on MIPS with RALINK and
SOC_RT305X):
/usr/bin/mips-linux-gnu-ld: drivers/gpu/drm/exynos/exynos_mixer.o: in function `mixer_bind':
exynos_mixer.c:(.text+0x958): undefined reference to `clk_set_parent'
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/exynos/Kconfig | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
index 6417f374b923a..951d5f708e92b 100644
--- a/drivers/gpu/drm/exynos/Kconfig
+++ b/drivers/gpu/drm/exynos/Kconfig
@@ -1,7 +1,8 @@
# SPDX-License-Identifier: GPL-2.0-only
config DRM_EXYNOS
tristate "DRM Support for Samsung SoC Exynos Series"
- depends on OF && DRM && (ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_MULTIPLATFORM || COMPILE_TEST)
+ depends on OF && DRM && COMMON_CLK
+ depends on ARCH_S3C64XX || ARCH_S5PV210 || ARCH_EXYNOS || ARCH_MULTIPLATFORM || COMPILE_TEST
depends on MMU
select DRM_KMS_HELPER
select VIDEOMODE_HELPERS
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 22/39] arm-smmu-qcom: Ensure the qcom_scm driver has finished probing
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (5 preceding siblings ...)
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 20/39] drm/exynos: depend on COMMON_CLK to fix compile tests Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 26/39] soc: fsl: dpio: Get the cpumask through cpumask_of(cpu) Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing Sasha Levin
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Maulik Shah, Sasha Levin, Saravana Kannan, Will Deacon,
linux-arm-msm, Lina Iyer, Bjorn Andersson, iommu, Andy Gross,
John Stultz, Marc Zyngier, Robin Murphy, linux-arm-kernel
From: John Stultz <john.stultz@linaro.org>
[ Upstream commit 72b55c96f3a5ae6e486c20b5dacf5114060ed042 ]
Robin Murphy pointed out that if the arm-smmu driver probes before
the qcom_scm driver, we may call qcom_scm_qsmmu500_wait_safe_toggle()
before the __scm is initialized.
Now, getting this to happen is a bit contrived, as in my efforts it
required enabling asynchronous probing for both drivers, moving the
firmware dts node to the end of the dtsi file, as well as forcing a
long delay in the qcom_scm_probe function.
With those tweaks we ran into the following crash:
[ 2.631040] arm-smmu 15000000.iommu: Stage-1: 48-bit VA -> 48-bit IPA
[ 2.633372] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
...
[ 2.633402] [0000000000000000] user address but active_mm is swapper
[ 2.633409] Internal error: Oops: 96000005 [#1] PREEMPT SMP
[ 2.633415] Modules linked in:
[ 2.633427] CPU: 5 PID: 117 Comm: kworker/u16:2 Tainted: G W 5.10.0-rc1-mainline-00025-g272a618fc36-dirty #3971
[ 2.633430] Hardware name: Thundercomm Dragonboard 845c (DT)
[ 2.633448] Workqueue: events_unbound async_run_entry_fn
[ 2.633456] pstate: 80c00005 (Nzcv daif +PAN +UAO -TCO BTYPE=--)
[ 2.633465] pc : qcom_scm_qsmmu500_wait_safe_toggle+0x78/0xb0
[ 2.633473] lr : qcom_smmu500_reset+0x58/0x78
[ 2.633476] sp : ffffffc0105a3b60
...
[ 2.633567] Call trace:
[ 2.633572] qcom_scm_qsmmu500_wait_safe_toggle+0x78/0xb0
[ 2.633576] qcom_smmu500_reset+0x58/0x78
[ 2.633581] arm_smmu_device_reset+0x194/0x270
[ 2.633585] arm_smmu_device_probe+0xc94/0xeb8
[ 2.633592] platform_drv_probe+0x58/0xa8
[ 2.633597] really_probe+0xec/0x398
[ 2.633601] driver_probe_device+0x5c/0xb8
[ 2.633606] __driver_attach_async_helper+0x64/0x88
[ 2.633610] async_run_entry_fn+0x4c/0x118
[ 2.633617] process_one_work+0x20c/0x4b0
[ 2.633621] worker_thread+0x48/0x460
[ 2.633628] kthread+0x14c/0x158
[ 2.633634] ret_from_fork+0x10/0x18
[ 2.633642] Code: a9034fa0 d0007f73 29107fa0 91342273 (f9400020)
To avoid this, this patch adds a check on qcom_scm_is_available() in
the qcom_smmu_impl_init() function, returning -EPROBE_DEFER if its
not ready.
This allows the driver to try to probe again later after qcom_scm has
finished probing.
Reported-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Andy Gross <agross@kernel.org>
Cc: Maulik Shah <mkshah@codeaurora.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Saravana Kannan <saravanak@google.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Lina Iyer <ilina@codeaurora.org>
Cc: iommu@lists.linux-foundation.org
Cc: linux-arm-msm <linux-arm-msm@vger.kernel.org>
Link: https://lore.kernel.org/r/20201112220520.48159-1-john.stultz@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
index be4318044f96c..702fbaa6c9ada 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
@@ -69,6 +69,10 @@ struct arm_smmu_device *qcom_smmu_impl_init(struct arm_smmu_device *smmu)
{
struct qcom_smmu *qsmmu;
+ /* Check to make sure qcom_scm has finished probing */
+ if (!qcom_scm_is_available())
+ return ERR_PTR(-EPROBE_DEFER);
+
qsmmu = devm_kzalloc(smmu->dev, sizeof(*qsmmu), GFP_KERNEL);
if (!qsmmu)
return ERR_PTR(-ENOMEM);
--
2.27.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 26/39] soc: fsl: dpio: Get the cpumask through cpumask_of(cpu)
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (6 preceding siblings ...)
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 22/39] arm-smmu-qcom: Ensure the qcom_scm driver has finished probing Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing Sasha Levin
8 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Yi Wang, Sasha Levin, Hao Si, Li Yang, Lin Chen, linuxppc-dev,
linux-arm-kernel
From: Hao Si <si.hao@zte.com.cn>
[ Upstream commit 2663b3388551230cbc4606a40fabf3331ceb59e4 ]
The local variable 'cpumask_t mask' is in the stack memory, and its address
is assigned to 'desc->affinity' in 'irq_set_affinity_hint()'.
But the memory area where this variable is located is at risk of being
modified.
During LTP testing, the following error was generated:
Unable to handle kernel paging request at virtual address ffff000012e9b790
Mem abort info:
ESR = 0x96000007
Exception class = DABT (current EL), IL = 32 bits
SET = 0, FnV = 0
EA = 0, S1PTW = 0
Data abort info:
ISV = 0, ISS = 0x00000007
CM = 0, WnR = 0
swapper pgtable: 4k pages, 48-bit VAs, pgdp = 0000000075ac5e07
[ffff000012e9b790] pgd=00000027dbffe003, pud=00000027dbffd003,
pmd=00000027b6d61003, pte=0000000000000000
Internal error: Oops: 96000007 [#1] PREEMPT SMP
Modules linked in: xt_conntrack
Process read_all (pid: 20171, stack limit = 0x0000000044ea4095)
CPU: 14 PID: 20171 Comm: read_all Tainted: G B W
Hardware name: NXP Layerscape LX2160ARDB (DT)
pstate: 80000085 (Nzcv daIf -PAN -UAO)
pc : irq_affinity_hint_proc_show+0x54/0xb0
lr : irq_affinity_hint_proc_show+0x4c/0xb0
sp : ffff00001138bc10
x29: ffff00001138bc10 x28: 0000ffffd131d1e0
x27: 00000000007000c0 x26: ffff8025b9480dc0
x25: ffff8025b9480da8 x24: 00000000000003ff
x23: ffff8027334f8300 x22: ffff80272e97d000
x21: ffff80272e97d0b0 x20: ffff8025b9480d80
x19: ffff000009a49000 x18: 0000000000000000
x17: 0000000000000000 x16: 0000000000000000
x15: 0000000000000000 x14: 0000000000000000
x13: 0000000000000000 x12: 0000000000000040
x11: 0000000000000000 x10: ffff802735b79b88
x9 : 0000000000000000 x8 : 0000000000000000
x7 : ffff000009a49848 x6 : 0000000000000003
x5 : 0000000000000000 x4 : ffff000008157d6c
x3 : ffff00001138bc10 x2 : ffff000012e9b790
x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
irq_affinity_hint_proc_show+0x54/0xb0
seq_read+0x1b0/0x440
proc_reg_read+0x80/0xd8
__vfs_read+0x60/0x178
vfs_read+0x94/0x150
ksys_read+0x74/0xf0
__arm64_sys_read+0x24/0x30
el0_svc_common.constprop.0+0xd8/0x1a0
el0_svc_handler+0x34/0x88
el0_svc+0x10/0x14
Code: f9001bbf 943e0732 f94066c2 b4000062 (f9400041)
---[ end trace b495bdcb0b3b732b ]---
Kernel panic - not syncing: Fatal exception
SMP: stopping secondary CPUs
SMP: failed to stop secondary CPUs 0,2-4,6,8,11,13-15
Kernel Offset: disabled
CPU features: 0x0,21006008
Memory Limit: none
---[ end Kernel panic - not syncing: Fatal exception ]---
Fix it by using 'cpumask_of(cpu)' to get the cpumask.
Signed-off-by: Hao Si <si.hao@zte.com.cn>
Signed-off-by: Lin Chen <chen.lin5@zte.com.cn>
Signed-off-by: Yi Wang <wang.yi59@zte.com.cn>
Signed-off-by: Li Yang <leoyang.li@nxp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/soc/fsl/dpio/dpio-driver.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/drivers/soc/fsl/dpio/dpio-driver.c b/drivers/soc/fsl/dpio/dpio-driver.c
index 7b642c330977f..7f397b4ad878d 100644
--- a/drivers/soc/fsl/dpio/dpio-driver.c
+++ b/drivers/soc/fsl/dpio/dpio-driver.c
@@ -95,7 +95,6 @@ static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu)
{
int error;
struct fsl_mc_device_irq *irq;
- cpumask_t mask;
irq = dpio_dev->irqs[0];
error = devm_request_irq(&dpio_dev->dev,
@@ -112,9 +111,7 @@ static int register_dpio_irq_handlers(struct fsl_mc_device *dpio_dev, int cpu)
}
/* set the affinity hint */
- cpumask_clear(&mask);
- cpumask_set_cpu(cpu, &mask);
- if (irq_set_affinity_hint(irq->msi_desc->irq, &mask))
+ if (irq_set_affinity_hint(irq->msi_desc->irq, cpumask_of(cpu)))
dev_err(&dpio_dev->dev,
"irq_set_affinity failed irq %d cpu %d\n",
irq->msi_desc->irq, cpu);
--
2.27.0
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
^ permalink raw reply related [flat|nested] 12+ messages in thread* [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing
[not found] <20201203132834.930999-1-sashal@kernel.org>
` (7 preceding siblings ...)
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 26/39] soc: fsl: dpio: Get the cpumask through cpumask_of(cpu) Sasha Levin
@ 2020-12-03 13:28 ` Sasha Levin
2020-12-03 14:54 ` Heiko Carstens
8 siblings, 1 reply; 12+ messages in thread
From: Sasha Levin @ 2020-12-03 13:28 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Mark Rutland, Sasha Levin, linux-ia64, linux-parisc, linux-s390,
Peter Zijlstra, linux-hexagon, linux-sh, linux-um, linux-mips,
linux-csky, sparclinux, openrisc, Sven Schnelle, linux-alpha,
uclinux-h8-devel, linux-riscv, linuxppc-dev, linux-arm-kernel
From: Peter Zijlstra <peterz@infradead.org>
[ Upstream commit 58c644ba512cfbc2e39b758dd979edd1d6d00e27 ]
We call arch_cpu_idle() with RCU disabled, but then use
local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.
Switch all arch_cpu_idle() implementations to use
raw_local_irq_{en,dis}able() and carefully manage the
lockdep,rcu,tracing state like we do in entry.
(XXX: we really should change arch_cpu_idle() to not return with
interrupts enabled)
Reported-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/alpha/kernel/process.c | 2 +-
arch/arm/kernel/process.c | 2 +-
arch/arm64/kernel/process.c | 2 +-
arch/csky/kernel/process.c | 2 +-
arch/h8300/kernel/process.c | 2 +-
arch/hexagon/kernel/process.c | 2 +-
arch/ia64/kernel/process.c | 2 +-
arch/microblaze/kernel/process.c | 2 +-
arch/mips/kernel/idle.c | 12 ++++++------
arch/nios2/kernel/process.c | 2 +-
arch/openrisc/kernel/process.c | 2 +-
arch/parisc/kernel/process.c | 2 +-
arch/powerpc/kernel/idle.c | 4 ++--
arch/riscv/kernel/process.c | 2 +-
arch/s390/kernel/idle.c | 6 +++---
arch/sh/kernel/idle.c | 2 +-
arch/sparc/kernel/leon_pmc.c | 4 ++--
arch/sparc/kernel/process_32.c | 2 +-
arch/sparc/kernel/process_64.c | 4 ++--
arch/um/kernel/process.c | 2 +-
arch/x86/include/asm/mwait.h | 2 --
arch/x86/kernel/process.c | 12 +++++++-----
kernel/sched/idle.c | 28 +++++++++++++++++++++++++++-
23 files changed, 64 insertions(+), 38 deletions(-)
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index 7462a79110024..4c7b0414a3ff3 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -57,7 +57,7 @@ EXPORT_SYMBOL(pm_power_off);
void arch_cpu_idle(void)
{
wtint(0);
- local_irq_enable();
+ raw_local_irq_enable();
}
void arch_cpu_idle_dead(void)
diff --git a/arch/arm/kernel/process.c b/arch/arm/kernel/process.c
index 8e6ace03e960b..9f199b1e83839 100644
--- a/arch/arm/kernel/process.c
+++ b/arch/arm/kernel/process.c
@@ -71,7 +71,7 @@ void arch_cpu_idle(void)
arm_pm_idle();
else
cpu_do_idle();
- local_irq_enable();
+ raw_local_irq_enable();
}
void arch_cpu_idle_prepare(void)
diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index 2da5f3f9d345f..f7c42a7d09b66 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -124,7 +124,7 @@ void arch_cpu_idle(void)
* tricks
*/
cpu_do_idle();
- local_irq_enable();
+ raw_local_irq_enable();
}
#ifdef CONFIG_HOTPLUG_CPU
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c
index f730869e21eed..69af6bc87e647 100644
--- a/arch/csky/kernel/process.c
+++ b/arch/csky/kernel/process.c
@@ -102,6 +102,6 @@ void arch_cpu_idle(void)
#ifdef CONFIG_CPU_PM_STOP
asm volatile("stop\n");
#endif
- local_irq_enable();
+ raw_local_irq_enable();
}
#endif
diff --git a/arch/h8300/kernel/process.c b/arch/h8300/kernel/process.c
index 83ce3caf73139..a2961c7b2332c 100644
--- a/arch/h8300/kernel/process.c
+++ b/arch/h8300/kernel/process.c
@@ -57,7 +57,7 @@ asmlinkage void ret_from_kernel_thread(void);
*/
void arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
__asm__("sleep");
}
diff --git a/arch/hexagon/kernel/process.c b/arch/hexagon/kernel/process.c
index dfd322c5ce83a..20962601a1b47 100644
--- a/arch/hexagon/kernel/process.c
+++ b/arch/hexagon/kernel/process.c
@@ -44,7 +44,7 @@ void arch_cpu_idle(void)
{
__vmwait();
/* interrupts wake us up, but irqs are still disabled */
- local_irq_enable();
+ raw_local_irq_enable();
}
/*
diff --git a/arch/ia64/kernel/process.c b/arch/ia64/kernel/process.c
index f19cb97c00987..1b2769260688d 100644
--- a/arch/ia64/kernel/process.c
+++ b/arch/ia64/kernel/process.c
@@ -252,7 +252,7 @@ void arch_cpu_idle(void)
if (mark_idle)
(*mark_idle)(1);
- safe_halt();
+ raw_safe_halt();
if (mark_idle)
(*mark_idle)(0);
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index a9e46e525cd0a..f99860771ff48 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -149,5 +149,5 @@ int dump_fpu(struct pt_regs *regs, elf_fpregset_t *fpregs)
void arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
}
diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index 5bc3b04693c7d..18e69ebf5691d 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -33,19 +33,19 @@ static void __cpuidle r3081_wait(void)
{
unsigned long cfg = read_c0_conf();
write_c0_conf(cfg | R30XX_CONF_HALT);
- local_irq_enable();
+ raw_local_irq_enable();
}
static void __cpuidle r39xx_wait(void)
{
if (!need_resched())
write_c0_conf(read_c0_conf() | TX39_CONF_HALT);
- local_irq_enable();
+ raw_local_irq_enable();
}
void __cpuidle r4k_wait(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
__r4k_wait();
}
@@ -64,7 +64,7 @@ void __cpuidle r4k_wait_irqoff(void)
" .set arch=r4000 \n"
" wait \n"
" .set pop \n");
- local_irq_enable();
+ raw_local_irq_enable();
}
/*
@@ -84,7 +84,7 @@ static void __cpuidle rm7k_wait_irqoff(void)
" wait \n"
" mtc0 $1, $12 # stalls until W stage \n"
" .set pop \n");
- local_irq_enable();
+ raw_local_irq_enable();
}
/*
@@ -257,7 +257,7 @@ void arch_cpu_idle(void)
if (cpu_wait)
cpu_wait();
else
- local_irq_enable();
+ raw_local_irq_enable();
}
#ifdef CONFIG_CPU_IDLE
diff --git a/arch/nios2/kernel/process.c b/arch/nios2/kernel/process.c
index 88a4ec03edab4..f5cc55a88d310 100644
--- a/arch/nios2/kernel/process.c
+++ b/arch/nios2/kernel/process.c
@@ -33,7 +33,7 @@ EXPORT_SYMBOL(pm_power_off);
void arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
}
/*
diff --git a/arch/openrisc/kernel/process.c b/arch/openrisc/kernel/process.c
index 0ff391f00334c..3c98728cce249 100644
--- a/arch/openrisc/kernel/process.c
+++ b/arch/openrisc/kernel/process.c
@@ -79,7 +79,7 @@ void machine_power_off(void)
*/
void arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
if (mfspr(SPR_UPR) & SPR_UPR_PMP)
mtspr(SPR_PMR, mfspr(SPR_PMR) | SPR_PMR_DME);
}
diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c
index f196d96e2f9f5..a92a23d6acd93 100644
--- a/arch/parisc/kernel/process.c
+++ b/arch/parisc/kernel/process.c
@@ -169,7 +169,7 @@ void __cpuidle arch_cpu_idle_dead(void)
void __cpuidle arch_cpu_idle(void)
{
- local_irq_enable();
+ raw_local_irq_enable();
/* nop on real hardware, qemu will idle sleep. */
asm volatile("or %%r10,%%r10,%%r10\n":::);
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index 422e31d2f5a2b..8df35f1329a42 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -60,9 +60,9 @@ void arch_cpu_idle(void)
* interrupts enabled, some don't.
*/
if (irqs_disabled())
- local_irq_enable();
+ raw_local_irq_enable();
} else {
- local_irq_enable();
+ raw_local_irq_enable();
/*
* Go into low thread priority and possibly
* low power mode.
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c
index 2b97c493427c9..308e1d95ecbf0 100644
--- a/arch/riscv/kernel/process.c
+++ b/arch/riscv/kernel/process.c
@@ -36,7 +36,7 @@ extern asmlinkage void ret_from_kernel_thread(void);
void arch_cpu_idle(void)
{
wait_for_interrupt();
- local_irq_enable();
+ raw_local_irq_enable();
}
void show_regs(struct pt_regs *regs)
diff --git a/arch/s390/kernel/idle.c b/arch/s390/kernel/idle.c
index f7f1e64e0d980..2b85096964f84 100644
--- a/arch/s390/kernel/idle.c
+++ b/arch/s390/kernel/idle.c
@@ -33,10 +33,10 @@ void enabled_wait(void)
PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
clear_cpu_flag(CIF_NOHZ_DELAY);
- local_irq_save(flags);
+ raw_local_irq_save(flags);
/* Call the assembler magic in entry.S */
psw_idle(idle, psw_mask);
- local_irq_restore(flags);
+ raw_local_irq_restore(flags);
/* Account time spent with enabled wait psw loaded as idle time. */
raw_write_seqcount_begin(&idle->seqcount);
@@ -123,7 +123,7 @@ void arch_cpu_idle_enter(void)
void arch_cpu_idle(void)
{
enabled_wait();
- local_irq_enable();
+ raw_local_irq_enable();
}
void arch_cpu_idle_exit(void)
diff --git a/arch/sh/kernel/idle.c b/arch/sh/kernel/idle.c
index 0dc0f52f9bb8d..f59814983bd59 100644
--- a/arch/sh/kernel/idle.c
+++ b/arch/sh/kernel/idle.c
@@ -22,7 +22,7 @@ static void (*sh_idle)(void);
void default_idle(void)
{
set_bl_bit();
- local_irq_enable();
+ raw_local_irq_enable();
/* Isn't this racy ? */
cpu_sleep();
clear_bl_bit();
diff --git a/arch/sparc/kernel/leon_pmc.c b/arch/sparc/kernel/leon_pmc.c
index 065e2d4b72908..396f46bca52eb 100644
--- a/arch/sparc/kernel/leon_pmc.c
+++ b/arch/sparc/kernel/leon_pmc.c
@@ -50,7 +50,7 @@ static void pmc_leon_idle_fixup(void)
register unsigned int address = (unsigned int)leon3_irqctrl_regs;
/* Interrupts need to be enabled to not hang the CPU */
- local_irq_enable();
+ raw_local_irq_enable();
__asm__ __volatile__ (
"wr %%g0, %%asr19\n"
@@ -66,7 +66,7 @@ static void pmc_leon_idle_fixup(void)
static void pmc_leon_idle(void)
{
/* Interrupts need to be enabled to not hang the CPU */
- local_irq_enable();
+ raw_local_irq_enable();
/* For systems without power-down, this will be no-op */
__asm__ __volatile__ ("wr %g0, %asr19\n\t");
diff --git a/arch/sparc/kernel/process_32.c b/arch/sparc/kernel/process_32.c
index adfcaeab3ddc5..a023637359154 100644
--- a/arch/sparc/kernel/process_32.c
+++ b/arch/sparc/kernel/process_32.c
@@ -74,7 +74,7 @@ void arch_cpu_idle(void)
{
if (sparc_idle)
(*sparc_idle)();
- local_irq_enable();
+ raw_local_irq_enable();
}
/* XXX cli/sti -> local_irq_xxx here, check this works once SMP is fixed. */
diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index a75093b993f9a..6f8c7822fc065 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -62,11 +62,11 @@ void arch_cpu_idle(void)
{
if (tlb_type != hypervisor) {
touch_nmi_watchdog();
- local_irq_enable();
+ raw_local_irq_enable();
} else {
unsigned long pstate;
- local_irq_enable();
+ raw_local_irq_enable();
/* The sun4v sleeping code requires that we have PSTATE.IE cleared over
* the cpu sleep hypervisor call.
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index 26b5e243d3fc0..495f101792b3d 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -217,7 +217,7 @@ void arch_cpu_idle(void)
{
cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
um_idle_sleep();
- local_irq_enable();
+ raw_local_irq_enable();
}
int __cant_sleep(void) {
diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
index e039a933aca3c..29dd27b5a339d 100644
--- a/arch/x86/include/asm/mwait.h
+++ b/arch/x86/include/asm/mwait.h
@@ -88,8 +88,6 @@ static inline void __mwaitx(unsigned long eax, unsigned long ebx,
static inline void __sti_mwait(unsigned long eax, unsigned long ecx)
{
- trace_hardirqs_on();
-
mds_idle_clear_cpu_buffers();
/* "mwait %eax, %ecx;" */
asm volatile("sti; .byte 0x0f, 0x01, 0xc9;"
diff --git a/arch/x86/kernel/process.c b/arch/x86/kernel/process.c
index ba4593a913fab..145a7ac0c19aa 100644
--- a/arch/x86/kernel/process.c
+++ b/arch/x86/kernel/process.c
@@ -685,7 +685,7 @@ void arch_cpu_idle(void)
*/
void __cpuidle default_idle(void)
{
- safe_halt();
+ raw_safe_halt();
}
#if defined(CONFIG_APM_MODULE) || defined(CONFIG_HALTPOLL_CPUIDLE_MODULE)
EXPORT_SYMBOL(default_idle);
@@ -736,6 +736,8 @@ void stop_this_cpu(void *dummy)
/*
* AMD Erratum 400 aware idle routine. We handle it the same way as C3 power
* states (local apic timer and TSC stop).
+ *
+ * XXX this function is completely buggered vs RCU and tracing.
*/
static void amd_e400_idle(void)
{
@@ -757,9 +759,9 @@ static void amd_e400_idle(void)
* The switch back from broadcast mode needs to be called with
* interrupts disabled.
*/
- local_irq_disable();
+ raw_local_irq_disable();
tick_broadcast_exit();
- local_irq_enable();
+ raw_local_irq_enable();
}
/*
@@ -801,9 +803,9 @@ static __cpuidle void mwait_idle(void)
if (!need_resched())
__sti_mwait(0, 0);
else
- local_irq_enable();
+ raw_local_irq_enable();
} else {
- local_irq_enable();
+ raw_local_irq_enable();
}
__current_clr_polling();
}
diff --git a/kernel/sched/idle.c b/kernel/sched/idle.c
index f324dc36fc43d..dee807ffad11b 100644
--- a/kernel/sched/idle.c
+++ b/kernel/sched/idle.c
@@ -78,7 +78,7 @@ void __weak arch_cpu_idle_dead(void) { }
void __weak arch_cpu_idle(void)
{
cpu_idle_force_poll = 1;
- local_irq_enable();
+ raw_local_irq_enable();
}
/**
@@ -94,9 +94,35 @@ void __cpuidle default_idle_call(void)
trace_cpu_idle(1, smp_processor_id());
stop_critical_timings();
+
+ /*
+ * arch_cpu_idle() is supposed to enable IRQs, however
+ * we can't do that because of RCU and tracing.
+ *
+ * Trace IRQs enable here, then switch off RCU, and have
+ * arch_cpu_idle() use raw_local_irq_enable(). Note that
+ * rcu_idle_enter() relies on lockdep IRQ state, so switch that
+ * last -- this is very similar to the entry code.
+ */
+ trace_hardirqs_on_prepare();
+ lockdep_hardirqs_on_prepare(_THIS_IP_);
rcu_idle_enter();
+ lockdep_hardirqs_on(_THIS_IP_);
+
arch_cpu_idle();
+
+ /*
+ * OK, so IRQs are enabled here, but RCU needs them disabled to
+ * turn itself back on.. funny thing is that disabling IRQs
+ * will cause tracing, which needs RCU. Jump through hoops to
+ * make it 'work'.
+ */
+ raw_local_irq_disable();
+ lockdep_hardirqs_off(_THIS_IP_);
rcu_idle_exit();
+ lockdep_hardirqs_on(_THIS_IP_);
+ raw_local_irq_enable();
+
start_critical_timings();
trace_cpu_idle(PWR_EVENT_EXIT, smp_processor_id());
}
--
2.27.0
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^ permalink raw reply related [flat|nested] 12+ messages in thread* Re: [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing
2020-12-03 13:28 ` [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing Sasha Levin
@ 2020-12-03 14:54 ` Heiko Carstens
2020-12-03 17:10 ` Peter Zijlstra
0 siblings, 1 reply; 12+ messages in thread
From: Heiko Carstens @ 2020-12-03 14:54 UTC (permalink / raw)
To: Sasha Levin
Cc: Mark Rutland, uclinux-h8-devel, linux-ia64, linux-parisc,
linux-s390, Peter Zijlstra, linux-hexagon, linux-sh, linux-um,
linux-kernel, stable, linux-mips, openrisc, linux-csky,
Sven Schnelle, linux-alpha, sparclinux, linux-riscv, linuxppc-dev,
linux-arm-kernel
On Thu, Dec 03, 2020 at 08:28:21AM -0500, Sasha Levin wrote:
> From: Peter Zijlstra <peterz@infradead.org>
>
> [ Upstream commit 58c644ba512cfbc2e39b758dd979edd1d6d00e27 ]
>
> We call arch_cpu_idle() with RCU disabled, but then use
> local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.
>
> Switch all arch_cpu_idle() implementations to use
> raw_local_irq_{en,dis}able() and carefully manage the
> lockdep,rcu,tracing state like we do in entry.
>
> (XXX: we really should change arch_cpu_idle() to not return with
> interrupts enabled)
>
> Reported-by: Sven Schnelle <svens@linux.ibm.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> Reviewed-by: Mark Rutland <mark.rutland@arm.com>
> Tested-by: Mark Rutland <mark.rutland@arm.com>
> Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
> Signed-off-by: Sasha Levin <sashal@kernel.org>
This patch broke s390 irq state tracing. A patch to fix this is
scheduled to be merged upstream today (hopefully).
Therefore I think this patch should not yet go into 5.9 stable.
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^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing
2020-12-03 14:54 ` Heiko Carstens
@ 2020-12-03 17:10 ` Peter Zijlstra
2020-12-13 14:10 ` Sasha Levin
0 siblings, 1 reply; 12+ messages in thread
From: Peter Zijlstra @ 2020-12-03 17:10 UTC (permalink / raw)
To: Heiko Carstens
Cc: Sasha Levin, Mark Rutland, linux-ia64, linux-parisc, linux-s390,
linux-hexagon, linux-sh, linux-um, linux-kernel, stable,
linux-mips, openrisc, sparclinux, linux-csky, Sven Schnelle,
linux-alpha, uclinux-h8-devel, linux-riscv, linuxppc-dev,
linux-arm-kernel
On Thu, Dec 03, 2020 at 03:54:42PM +0100, Heiko Carstens wrote:
> On Thu, Dec 03, 2020 at 08:28:21AM -0500, Sasha Levin wrote:
> > From: Peter Zijlstra <peterz@infradead.org>
> >
> > [ Upstream commit 58c644ba512cfbc2e39b758dd979edd1d6d00e27 ]
> >
> > We call arch_cpu_idle() with RCU disabled, but then use
> > local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.
> >
> > Switch all arch_cpu_idle() implementations to use
> > raw_local_irq_{en,dis}able() and carefully manage the
> > lockdep,rcu,tracing state like we do in entry.
> >
> > (XXX: we really should change arch_cpu_idle() to not return with
> > interrupts enabled)
> >
> > Reported-by: Sven Schnelle <svens@linux.ibm.com>
> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> > Reviewed-by: Mark Rutland <mark.rutland@arm.com>
> > Tested-by: Mark Rutland <mark.rutland@arm.com>
> > Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
> > Signed-off-by: Sasha Levin <sashal@kernel.org>
>
> This patch broke s390 irq state tracing. A patch to fix this is
> scheduled to be merged upstream today (hopefully).
> Therefore I think this patch should not yet go into 5.9 stable.
Agreed.
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^ permalink raw reply [flat|nested] 12+ messages in thread* Re: [PATCH AUTOSEL 5.9 27/39] sched/idle: Fix arch_cpu_idle() vs tracing
2020-12-03 17:10 ` Peter Zijlstra
@ 2020-12-13 14:10 ` Sasha Levin
0 siblings, 0 replies; 12+ messages in thread
From: Sasha Levin @ 2020-12-13 14:10 UTC (permalink / raw)
To: Peter Zijlstra
Cc: Mark Rutland, uclinux-h8-devel, linux-ia64, linux-parisc,
linux-s390, linux-hexagon, Heiko Carstens, linux-sh, linux-um,
linux-kernel, stable, linux-mips, openrisc, linux-csky,
Sven Schnelle, linux-alpha, sparclinux, linux-riscv, linuxppc-dev,
linux-arm-kernel
On Thu, Dec 03, 2020 at 06:10:15PM +0100, Peter Zijlstra wrote:
>On Thu, Dec 03, 2020 at 03:54:42PM +0100, Heiko Carstens wrote:
>> On Thu, Dec 03, 2020 at 08:28:21AM -0500, Sasha Levin wrote:
>> > From: Peter Zijlstra <peterz@infradead.org>
>> >
>> > [ Upstream commit 58c644ba512cfbc2e39b758dd979edd1d6d00e27 ]
>> >
>> > We call arch_cpu_idle() with RCU disabled, but then use
>> > local_irq_{en,dis}able(), which invokes tracing, which relies on RCU.
>> >
>> > Switch all arch_cpu_idle() implementations to use
>> > raw_local_irq_{en,dis}able() and carefully manage the
>> > lockdep,rcu,tracing state like we do in entry.
>> >
>> > (XXX: we really should change arch_cpu_idle() to not return with
>> > interrupts enabled)
>> >
>> > Reported-by: Sven Schnelle <svens@linux.ibm.com>
>> > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
>> > Reviewed-by: Mark Rutland <mark.rutland@arm.com>
>> > Tested-by: Mark Rutland <mark.rutland@arm.com>
>> > Link: https://lkml.kernel.org/r/20201120114925.594122626@infradead.org
>> > Signed-off-by: Sasha Levin <sashal@kernel.org>
>>
>> This patch broke s390 irq state tracing. A patch to fix this is
>> scheduled to be merged upstream today (hopefully).
>> Therefore I think this patch should not yet go into 5.9 stable.
>
>Agreed.
I'll also grab b1cae1f84a0f ("s390: fix irq state tracing"). Thanks!
--
Thanks,
Sasha
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^ permalink raw reply [flat|nested] 12+ messages in thread