* [PATCH v2 09/16] PCI: dwc: Rework MSI initialization
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
Cc: Roy Zang, Lorenzo Pieralisi, Jingoo Han, linux-pci, Minghuan Lian,
Murali Karicheri, Mingkai Hu, Gustavo Pimentel, Bjorn Helgaas,
linuxppc-dev, linux-arm-kernel
In-Reply-To: <20201105211159.1814485-1-robh@kernel.org>
There are 3 possible MSI implementations for the DWC host. The first is
using the built-in DWC MSI controller. The 2nd is a custom MSI
controller as part of the PCI host (keystone only). The 3rd is an
external MSI controller (typically GICv3 ITS). Currently, the last 2
are distinguished with a .msi_host_init() hook with the 3rd option using
an empty function. However we can detect the 3rd case with the presence
of 'msi-parent' or 'msi-map' properties, so let's do that instead and
remove the empty functions.
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Minghuan Lian <minghuan.Lian@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: Roy Zang <roy.zang@nxp.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/pci/controller/dwc/pci-keystone.c | 9 -------
drivers/pci/controller/dwc/pci-layerscape.c | 25 -------------------
.../pci/controller/dwc/pcie-designware-host.c | 20 +++++++++------
drivers/pci/controller/dwc/pcie-designware.h | 1 +
drivers/pci/controller/dwc/pcie-intel-gw.c | 9 -------
5 files changed, 13 insertions(+), 51 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index 9cf14f13798b..784385ae6074 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -272,14 +272,6 @@ static void ks_pcie_handle_legacy_irq(struct keystone_pcie *ks_pcie,
ks_pcie_app_writel(ks_pcie, IRQ_EOI, offset);
}
-/*
- * Dummy function so that DW core doesn't configure MSI
- */
-static int ks_pcie_am654_msi_host_init(struct pcie_port *pp)
-{
- return 0;
-}
-
static void ks_pcie_enable_error_irq(struct keystone_pcie *ks_pcie)
{
ks_pcie_app_writel(ks_pcie, ERR_IRQ_ENABLE_SET, ERR_IRQ_ALL);
@@ -854,7 +846,6 @@ static const struct dw_pcie_host_ops ks_pcie_host_ops = {
static const struct dw_pcie_host_ops ks_pcie_am654_host_ops = {
.host_init = ks_pcie_host_init,
- .msi_host_init = ks_pcie_am654_msi_host_init,
};
static irqreturn_t ks_pcie_err_irq_handler(int irq, void *priv)
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
index 53e56d54c482..0d84986c4c16 100644
--- a/drivers/pci/controller/dwc/pci-layerscape.c
+++ b/drivers/pci/controller/dwc/pci-layerscape.c
@@ -168,37 +168,12 @@ static int ls1021_pcie_host_init(struct pcie_port *pp)
return ls_pcie_host_init(pp);
}
-static int ls_pcie_msi_host_init(struct pcie_port *pp)
-{
- struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
- struct device *dev = pci->dev;
- struct device_node *np = dev->of_node;
- struct device_node *msi_node;
-
- /*
- * The MSI domain is set by the generic of_msi_configure(). This
- * .msi_host_init() function keeps us from doing the default MSI
- * domain setup in dw_pcie_host_init() and also enforces the
- * requirement that "msi-parent" exists.
- */
- msi_node = of_parse_phandle(np, "msi-parent", 0);
- if (!msi_node) {
- dev_err(dev, "failed to find msi-parent\n");
- return -EINVAL;
- }
-
- of_node_put(msi_node);
- return 0;
-}
-
static const struct dw_pcie_host_ops ls1021_pcie_host_ops = {
.host_init = ls1021_pcie_host_init,
- .msi_host_init = ls_pcie_msi_host_init,
};
static const struct dw_pcie_host_ops ls_pcie_host_ops = {
.host_init = ls_pcie_host_init,
- .msi_host_init = ls_pcie_msi_host_init,
};
static const struct dw_pcie_ops dw_ls1021_pcie_ops = {
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index 95deef0eaadf..9b952639d020 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -365,6 +365,10 @@ int dw_pcie_host_init(struct pcie_port *pp)
pci->link_gen = of_pci_get_max_link_speed(np);
if (pci_msi_enabled()) {
+ pp->has_msi_ctrl = !(pp->ops->msi_host_init ||
+ of_property_read_bool(np, "msi-parent") ||
+ of_property_read_bool(np, "msi-map"));
+
if (!pp->num_vectors) {
pp->num_vectors = MSI_DEF_NUM_VECTORS;
} else if (pp->num_vectors > MAX_MSI_IRQS) {
@@ -372,7 +376,11 @@ int dw_pcie_host_init(struct pcie_port *pp)
return -EINVAL;
}
- if (!pp->ops->msi_host_init) {
+ if (pp->ops->msi_host_init) {
+ ret = pp->ops->msi_host_init(pp);
+ if (ret < 0)
+ return ret;
+ } else if (pp->has_msi_ctrl) {
if (!pp->msi_irq) {
pp->msi_irq = platform_get_irq_byname_optional(pdev, "msi");
if (pp->msi_irq < 0) {
@@ -402,10 +410,6 @@ int dw_pcie_host_init(struct pcie_port *pp)
pp->msi_data = 0;
goto err_free_msi;
}
- } else {
- ret = pp->ops->msi_host_init(pp);
- if (ret < 0)
- return ret;
}
}
@@ -426,7 +430,7 @@ int dw_pcie_host_init(struct pcie_port *pp)
return 0;
err_free_msi:
- if (pci_msi_enabled() && !pp->ops->msi_host_init)
+ if (pp->has_msi_ctrl)
dw_pcie_free_msi(pp);
return ret;
}
@@ -436,7 +440,7 @@ void dw_pcie_host_deinit(struct pcie_port *pp)
{
pci_stop_root_bus(pp->bridge->bus);
pci_remove_root_bus(pp->bridge->bus);
- if (pci_msi_enabled() && !pp->ops->msi_host_init)
+ if (pp->has_msi_ctrl)
dw_pcie_free_msi(pp);
}
EXPORT_SYMBOL_GPL(dw_pcie_host_deinit);
@@ -544,7 +548,7 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
dw_pcie_setup(pci);
- if (pci_msi_enabled() && !pp->ops->msi_host_init) {
+ if (pp->has_msi_ctrl) {
num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
/* Initialize IRQ Status array */
diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
index 96382dcb2859..5d374bab10d1 100644
--- a/drivers/pci/controller/dwc/pcie-designware.h
+++ b/drivers/pci/controller/dwc/pcie-designware.h
@@ -175,6 +175,7 @@ struct dw_pcie_host_ops {
};
struct pcie_port {
+ bool has_msi_ctrl:1;
u64 cfg0_base;
void __iomem *va_cfg0_base;
u32 cfg0_size;
diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c
index c562eb7454b1..292b9de86532 100644
--- a/drivers/pci/controller/dwc/pcie-intel-gw.c
+++ b/drivers/pci/controller/dwc/pcie-intel-gw.c
@@ -385,14 +385,6 @@ static int intel_pcie_rc_init(struct pcie_port *pp)
return intel_pcie_host_setup(lpp);
}
-/*
- * Dummy function so that DW core doesn't configure MSI
- */
-static int intel_pcie_msi_init(struct pcie_port *pp)
-{
- return 0;
-}
-
static u64 intel_pcie_cpu_addr(struct dw_pcie *pcie, u64 cpu_addr)
{
return cpu_addr + BUS_IATU_OFFSET;
@@ -404,7 +396,6 @@ static const struct dw_pcie_ops intel_pcie_ops = {
static const struct dw_pcie_host_ops intel_pcie_dw_ops = {
.host_init = intel_pcie_rc_init,
- .msi_host_init = intel_pcie_msi_init,
};
static const struct intel_pcie_soc pcie_data = {
--
2.25.1
^ permalink raw reply related
* [PATCH v2 05/16] PCI: dwc: Ensure all outbound ATU windows are reset
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
Cc: Roy Zang, Lorenzo Pieralisi, linux-pci, Minghuan Lian,
linux-arm-kernel, Jingoo Han, Bjorn Helgaas, Gustavo Pimentel,
linuxppc-dev, Mingkai Hu
In-Reply-To: <20201105211159.1814485-1-robh@kernel.org>
The Layerscape driver clears the ATU registers which may have been
configured by the bootloader. Any driver could have the same issue
and doing it for all drivers doesn't hurt, so let's move it into the
common DWC code.
Cc: Minghuan Lian <minghuan.Lian@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: Roy Zang <roy.zang@nxp.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: linuxppc-dev@lists.ozlabs.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
drivers/pci/controller/dwc/pci-layerscape.c | 14 --------------
drivers/pci/controller/dwc/pcie-designware-host.c | 5 +++++
2 files changed, 5 insertions(+), 14 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-layerscape.c b/drivers/pci/controller/dwc/pci-layerscape.c
index f24f79a70d9a..53e56d54c482 100644
--- a/drivers/pci/controller/dwc/pci-layerscape.c
+++ b/drivers/pci/controller/dwc/pci-layerscape.c
@@ -83,14 +83,6 @@ static void ls_pcie_drop_msg_tlp(struct ls_pcie *pcie)
iowrite32(val, pci->dbi_base + PCIE_STRFMR1);
}
-static void ls_pcie_disable_outbound_atus(struct ls_pcie *pcie)
-{
- int i;
-
- for (i = 0; i < PCIE_IATU_NUM; i++)
- dw_pcie_disable_atu(pcie->pci, i, DW_PCIE_REGION_OUTBOUND);
-}
-
static int ls1021_pcie_link_up(struct dw_pcie *pci)
{
u32 state;
@@ -136,12 +128,6 @@ static int ls_pcie_host_init(struct pcie_port *pp)
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct ls_pcie *pcie = to_ls_pcie(pci);
- /*
- * Disable outbound windows configured by the bootloader to avoid
- * one transaction hitting multiple outbound windows.
- * dw_pcie_setup_rc() will reconfigure the outbound windows.
- */
- ls_pcie_disable_outbound_atus(pcie);
ls_pcie_fix_error_response(pcie);
dw_pcie_dbi_ro_wr_en(pci);
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index cde45b2076ee..265a48f1a0ae 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -534,6 +534,7 @@ static struct pci_ops dw_pcie_ops = {
void dw_pcie_setup_rc(struct pcie_port *pp)
{
+ int i;
u32 val, ctrl, num_ctrls;
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
@@ -583,6 +584,10 @@ void dw_pcie_setup_rc(struct pcie_port *pp)
PCI_COMMAND_MASTER | PCI_COMMAND_SERR;
dw_pcie_writel_dbi(pci, PCI_COMMAND, val);
+ /* Ensure all outbound windows are disabled so there are multiple matches */
+ for (i = 0; i < pci->num_viewport; i++)
+ dw_pcie_disable_atu(pci, i, DW_PCIE_REGION_OUTBOUND);
+
/*
* If the platform provides its own child bus config accesses, it means
* the platform uses its own address translation component rather than
--
2.25.1
^ permalink raw reply related
* [PATCH v2 03/16] PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into common code
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
Cc: Kunihiko Hayashi, linux-pci, Binghui Wang, Bjorn Andersson,
Masahiro Yamada, Thierry Reding, Jonathan Chocron,
Kishon Vijay Abraham I, Jesper Nilsson, Lorenzo Pieralisi,
Pratyush Anand, linux-arm-kernel, Jonathan Hunter, Andy Gross,
linux-arm-kernel, Xiaowei Song, linux-tegra, linux-arm-msm,
Murali Karicheri, Bjorn Helgaas, linux-omap, Mingkai Hu, Roy Zang,
Minghuan Lian, Gustavo Pimentel, Stanimir Varbanov, Jingoo Han,
linuxppc-dev
In-Reply-To: <20201105211159.1814485-1-robh@kernel.org>
Most DWC drivers use the common register resource names "dbi", "dbi2", and
"addr_space", so let's move their setup into the DWC common code.
This means 'dbi_base' in particular is setup later, but it looks like no
drivers touch DBI registers before dw_pcie_host_init or dw_pcie_ep_init.
Cc: Kishon Vijay Abraham I <kishon@ti.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: Minghuan Lian <minghuan.Lian@nxp.com>
Cc: Mingkai Hu <mingkai.hu@nxp.com>
Cc: Roy Zang <roy.zang@nxp.com>
Cc: Jonathan Chocron <jonnyc@amazon.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Gustavo Pimentel <gustavo.pimentel@synopsys.com>
Cc: Xiaowei Song <songxiaowei@hisilicon.com>
Cc: Binghui Wang <wangbinghui@hisilicon.com>
Cc: Andy Gross <agross@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Stanimir Varbanov <svarbanov@mm-sol.com>
Cc: Pratyush Anand <pratyush.anand@gmail.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: linux-omap@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-arm-kernel@axis.com
Cc: linux-arm-msm@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Acked-by: Jingoo Han <jingoohan1@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
v2:
- Fix Layerscape EP build error
---
drivers/pci/controller/dwc/pci-dra7xx.c | 8 ----
drivers/pci/controller/dwc/pci-keystone.c | 29 +-----------
.../pci/controller/dwc/pci-layerscape-ep.c | 37 +--------------
drivers/pci/controller/dwc/pcie-al.c | 9 +---
drivers/pci/controller/dwc/pcie-artpec6.c | 43 ++----------------
.../pci/controller/dwc/pcie-designware-ep.c | 29 ++++++++++--
.../pci/controller/dwc/pcie-designware-host.c | 7 +++
.../pci/controller/dwc/pcie-designware-plat.c | 45 +------------------
drivers/pci/controller/dwc/pcie-intel-gw.c | 4 --
drivers/pci/controller/dwc/pcie-kirin.c | 5 ---
drivers/pci/controller/dwc/pcie-qcom.c | 8 ----
drivers/pci/controller/dwc/pcie-spear13xx.c | 11 +----
drivers/pci/controller/dwc/pcie-tegra194.c | 22 ---------
drivers/pci/controller/dwc/pcie-uniphier-ep.c | 38 +---------------
drivers/pci/controller/dwc/pcie-uniphier.c | 6 ---
15 files changed, 47 insertions(+), 254 deletions(-)
diff --git a/drivers/pci/controller/dwc/pci-dra7xx.c b/drivers/pci/controller/dwc/pci-dra7xx.c
index 6d012d2b1e90..a4aabc85dbb1 100644
--- a/drivers/pci/controller/dwc/pci-dra7xx.c
+++ b/drivers/pci/controller/dwc/pci-dra7xx.c
@@ -578,7 +578,6 @@ static int __init dra7xx_add_pcie_ep(struct dra7xx_pcie *dra7xx,
{
int ret;
struct dw_pcie_ep *ep;
- struct resource *res;
struct device *dev = &pdev->dev;
struct dw_pcie *pci = dra7xx->pci;
@@ -594,13 +593,6 @@ static int __init dra7xx_add_pcie_ep(struct dra7xx_pcie *dra7xx,
if (IS_ERR(pci->dbi_base2))
return PTR_ERR(pci->dbi_base2);
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
ret = dw_pcie_ep_init(ep);
if (ret) {
dev_err(dev, "failed to initialize endpoint\n");
diff --git a/drivers/pci/controller/dwc/pci-keystone.c b/drivers/pci/controller/dwc/pci-keystone.c
index a222728238ca..9cf14f13798b 100644
--- a/drivers/pci/controller/dwc/pci-keystone.c
+++ b/drivers/pci/controller/dwc/pci-keystone.c
@@ -977,33 +977,6 @@ static const struct dw_pcie_ep_ops ks_pcie_am654_ep_ops = {
.get_features = &ks_pcie_am654_get_features,
};
-static int __init ks_pcie_add_pcie_ep(struct keystone_pcie *ks_pcie,
- struct platform_device *pdev)
-{
- int ret;
- struct dw_pcie_ep *ep;
- struct resource *res;
- struct device *dev = &pdev->dev;
- struct dw_pcie *pci = ks_pcie->pci;
-
- ep = &pci->ep;
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
- ret = dw_pcie_ep_init(ep);
- if (ret) {
- dev_err(dev, "failed to initialize endpoint\n");
- return ret;
- }
-
- return 0;
-}
-
static void ks_pcie_disable_phy(struct keystone_pcie *ks_pcie)
{
int num_lanes = ks_pcie->num_lanes;
@@ -1313,7 +1286,7 @@ static int __init ks_pcie_probe(struct platform_device *pdev)
}
pci->ep.ops = ep_ops;
- ret = ks_pcie_add_pcie_ep(ks_pcie, pdev);
+ ret = dw_pcie_ep_init(&pci->ep);
if (ret < 0)
goto err_get_sync;
break;
diff --git a/drivers/pci/controller/dwc/pci-layerscape-ep.c b/drivers/pci/controller/dwc/pci-layerscape-ep.c
index 84206f265e54..4d12efdacd2f 100644
--- a/drivers/pci/controller/dwc/pci-layerscape-ep.c
+++ b/drivers/pci/controller/dwc/pci-layerscape-ep.c
@@ -18,8 +18,6 @@
#include "pcie-designware.h"
-#define PCIE_DBI2_OFFSET 0x1000 /* DBI2 base address*/
-
#define to_ls_pcie_ep(x) dev_get_drvdata((x)->dev)
struct ls_pcie_ep_drvdata {
@@ -124,34 +122,6 @@ static const struct of_device_id ls_pcie_ep_of_match[] = {
{ },
};
-static int __init ls_add_pcie_ep(struct ls_pcie_ep *pcie,
- struct platform_device *pdev)
-{
- struct dw_pcie *pci = pcie->pci;
- struct device *dev = pci->dev;
- struct dw_pcie_ep *ep;
- struct resource *res;
- int ret;
-
- ep = &pci->ep;
- ep->ops = pcie->drvdata->ops;
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
- ret = dw_pcie_ep_init(ep);
- if (ret) {
- dev_err(dev, "failed to initialize endpoint\n");
- return ret;
- }
-
- return 0;
-}
-
static int __init ls_pcie_ep_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -159,7 +129,6 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
struct ls_pcie_ep *pcie;
struct pci_epc_features *ls_epc;
struct resource *dbi_base;
- int ret;
pcie = devm_kzalloc(dev, sizeof(*pcie), GFP_KERNEL);
if (!pcie)
@@ -188,13 +157,11 @@ static int __init ls_pcie_ep_probe(struct platform_device *pdev)
if (IS_ERR(pci->dbi_base))
return PTR_ERR(pci->dbi_base);
- pci->dbi_base2 = pci->dbi_base + PCIE_DBI2_OFFSET;
+ pci->ep.ops = &ls_pcie_ep_ops;
platform_set_drvdata(pdev, pcie);
- ret = ls_add_pcie_ep(pcie, pdev);
-
- return ret;
+ return dw_pcie_ep_init(&pci->ep);
}
static struct platform_driver ls_pcie_ep_driver = {
diff --git a/drivers/pci/controller/dwc/pcie-al.c b/drivers/pci/controller/dwc/pcie-al.c
index f973fbca90cf..d06866921187 100644
--- a/drivers/pci/controller/dwc/pcie-al.c
+++ b/drivers/pci/controller/dwc/pcie-al.c
@@ -347,7 +347,6 @@ static int al_pcie_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct resource *controller_res;
struct resource *ecam_res;
- struct resource *dbi_res;
struct al_pcie *al_pcie;
struct dw_pcie *pci;
@@ -365,11 +364,6 @@ static int al_pcie_probe(struct platform_device *pdev)
al_pcie->pci = pci;
al_pcie->dev = dev;
- dbi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_res);
- if (IS_ERR(pci->dbi_base))
- return PTR_ERR(pci->dbi_base);
-
ecam_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "config");
if (!ecam_res) {
dev_err(dev, "couldn't find 'config' reg in DT\n");
@@ -386,8 +380,7 @@ static int al_pcie_probe(struct platform_device *pdev)
return PTR_ERR(al_pcie->controller_base);
}
- dev_dbg(dev, "From DT: dbi_base: %pR, controller_base: %pR\n",
- dbi_res, controller_res);
+ dev_dbg(dev, "From DT: controller_base: %pR\n", controller_res);
platform_set_drvdata(pdev, al_pcie);
diff --git a/drivers/pci/controller/dwc/pcie-artpec6.c b/drivers/pci/controller/dwc/pcie-artpec6.c
index 929448e9e0bc..52ad7909cd0c 100644
--- a/drivers/pci/controller/dwc/pcie-artpec6.c
+++ b/drivers/pci/controller/dwc/pcie-artpec6.c
@@ -403,38 +403,6 @@ static const struct dw_pcie_ep_ops pcie_ep_ops = {
.raise_irq = artpec6_pcie_raise_irq,
};
-static int artpec6_add_pcie_ep(struct artpec6_pcie *artpec6_pcie,
- struct platform_device *pdev)
-{
- int ret;
- struct dw_pcie_ep *ep;
- struct resource *res;
- struct device *dev = &pdev->dev;
- struct dw_pcie *pci = artpec6_pcie->pci;
-
- ep = &pci->ep;
- ep->ops = &pcie_ep_ops;
-
- pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
- if (IS_ERR(pci->dbi_base2))
- return PTR_ERR(pci->dbi_base2);
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
- ret = dw_pcie_ep_init(ep);
- if (ret) {
- dev_err(dev, "failed to initialize endpoint\n");
- return ret;
- }
-
- return 0;
-}
-
static int artpec6_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
@@ -469,10 +437,6 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
artpec6_pcie->variant = variant;
artpec6_pcie->mode = mode;
- pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
- if (IS_ERR(pci->dbi_base))
- return PTR_ERR(pci->dbi_base);
-
artpec6_pcie->phy_base =
devm_platform_ioremap_resource_byname(pdev, "phy");
if (IS_ERR(artpec6_pcie->phy_base))
@@ -504,9 +468,10 @@ static int artpec6_pcie_probe(struct platform_device *pdev)
val = artpec6_pcie_readl(artpec6_pcie, PCIECFG);
val &= ~PCIECFG_DEVICE_TYPE_MASK;
artpec6_pcie_writel(artpec6_pcie, PCIECFG, val);
- ret = artpec6_add_pcie_ep(artpec6_pcie, pdev);
- if (ret < 0)
- return ret;
+
+ pci->ep.ops = &pcie_ep_ops;
+
+ return dw_pcie_ep_init(&pci->ep);
break;
}
default:
diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c
index ad7da4ea43a5..6fe176e1bdd2 100644
--- a/drivers/pci/controller/dwc/pcie-designware-ep.c
+++ b/drivers/pci/controller/dwc/pcie-designware-ep.c
@@ -7,6 +7,7 @@
*/
#include <linux/of.h>
+#include <linux/platform_device.h>
#include "pcie-designware.h"
#include <linux/pci-epc.h>
@@ -676,20 +677,42 @@ int dw_pcie_ep_init(struct dw_pcie_ep *ep)
int ret;
void *addr;
u8 func_no;
+ struct resource *res;
struct pci_epc *epc;
struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
struct device *dev = pci->dev;
+ struct platform_device *pdev = to_platform_device(dev);
struct device_node *np = dev->of_node;
const struct pci_epc_features *epc_features;
struct dw_pcie_ep_func *ep_func;
INIT_LIST_HEAD(&ep->func_list);
- if (!pci->dbi_base || !pci->dbi_base2) {
- dev_err(dev, "dbi_base/dbi_base2 is not populated\n");
- return -EINVAL;
+ if (!pci->dbi_base) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
+ pci->dbi_base = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
+ }
+
+ if (!pci->dbi_base2) {
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi2");
+ if (!res)
+ pci->dbi_base2 = pci->dbi_base + SZ_4K;
+ else {
+ pci->dbi_base2 = devm_pci_remap_cfg_resource(dev, res);
+ if (IS_ERR(pci->dbi_base2))
+ return PTR_ERR(pci->dbi_base2);
+ }
}
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
+ if (!res)
+ return -EINVAL;
+
+ ep->phys_base = res->start;
+ ep->addr_size = resource_size(res);
+
ret = of_property_read_u32(np, "num-ib-windows", &ep->num_ib_windows);
if (ret < 0) {
dev_err(dev, "Unable to read *num-ib-windows* property\n");
diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
index a6ffab9b537e..cde45b2076ee 100644
--- a/drivers/pci/controller/dwc/pcie-designware-host.c
+++ b/drivers/pci/controller/dwc/pcie-designware-host.c
@@ -310,6 +310,13 @@ int dw_pcie_host_init(struct pcie_port *pp)
dev_err(dev, "Missing *config* reg space\n");
}
+ if (!pci->dbi_base) {
+ struct resource *dbi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
+ pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_res);
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
+ }
+
bridge = devm_pci_alloc_host_bridge(dev, 0);
if (!bridge)
return -ENOMEM;
diff --git a/drivers/pci/controller/dwc/pcie-designware-plat.c b/drivers/pci/controller/dwc/pcie-designware-plat.c
index e3e300669ed5..562a05e07b1d 100644
--- a/drivers/pci/controller/dwc/pcie-designware-plat.c
+++ b/drivers/pci/controller/dwc/pcie-designware-plat.c
@@ -139,43 +139,11 @@ static int dw_plat_add_pcie_port(struct dw_plat_pcie *dw_plat_pcie,
return 0;
}
-static int dw_plat_add_pcie_ep(struct dw_plat_pcie *dw_plat_pcie,
- struct platform_device *pdev)
-{
- int ret;
- struct dw_pcie_ep *ep;
- struct resource *res;
- struct device *dev = &pdev->dev;
- struct dw_pcie *pci = dw_plat_pcie->pci;
-
- ep = &pci->ep;
- ep->ops = &pcie_ep_ops;
-
- pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
- if (IS_ERR(pci->dbi_base2))
- return PTR_ERR(pci->dbi_base2);
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
- ret = dw_pcie_ep_init(ep);
- if (ret) {
- dev_err(dev, "Failed to initialize endpoint\n");
- return ret;
- }
- return 0;
-}
-
static int dw_plat_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct dw_plat_pcie *dw_plat_pcie;
struct dw_pcie *pci;
- struct resource *res; /* Resource from DT */
int ret;
const struct of_device_id *match;
const struct dw_plat_pcie_of_data *data;
@@ -202,14 +170,6 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
dw_plat_pcie->pci = pci;
dw_plat_pcie->mode = mode;
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- if (!res)
- res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
- pci->dbi_base = devm_ioremap_resource(dev, res);
- if (IS_ERR(pci->dbi_base))
- return PTR_ERR(pci->dbi_base);
-
platform_set_drvdata(pdev, dw_plat_pcie);
switch (dw_plat_pcie->mode) {
@@ -225,9 +185,8 @@ static int dw_plat_pcie_probe(struct platform_device *pdev)
if (!IS_ENABLED(CONFIG_PCIE_DW_PLAT_EP))
return -ENODEV;
- ret = dw_plat_add_pcie_ep(dw_plat_pcie, pdev);
- if (ret < 0)
- return ret;
+ pci->ep.ops = &pcie_ep_ops;
+ return dw_pcie_ep_init(&pci->ep);
break;
default:
dev_err(dev, "INVALID device type %d\n", dw_plat_pcie->mode);
diff --git a/drivers/pci/controller/dwc/pcie-intel-gw.c b/drivers/pci/controller/dwc/pcie-intel-gw.c
index 77ef88333115..88782653ed21 100644
--- a/drivers/pci/controller/dwc/pcie-intel-gw.c
+++ b/drivers/pci/controller/dwc/pcie-intel-gw.c
@@ -237,10 +237,6 @@ static int intel_pcie_get_resources(struct platform_device *pdev)
struct device *dev = pci->dev;
int ret;
- pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
- if (IS_ERR(pci->dbi_base))
- return PTR_ERR(pci->dbi_base);
-
lpp->core_clk = devm_clk_get(dev, NULL);
if (IS_ERR(lpp->core_clk)) {
ret = PTR_ERR(lpp->core_clk);
diff --git a/drivers/pci/controller/dwc/pcie-kirin.c b/drivers/pci/controller/dwc/pcie-kirin.c
index d0a6a2dee6f5..3042a23cf09a 100644
--- a/drivers/pci/controller/dwc/pcie-kirin.c
+++ b/drivers/pci/controller/dwc/pcie-kirin.c
@@ -157,11 +157,6 @@ static long kirin_pcie_get_resource(struct kirin_pcie *kirin_pcie,
if (IS_ERR(kirin_pcie->phy_base))
return PTR_ERR(kirin_pcie->phy_base);
- kirin_pcie->pci->dbi_base =
- devm_platform_ioremap_resource_byname(pdev, "dbi");
- if (IS_ERR(kirin_pcie->pci->dbi_base))
- return PTR_ERR(kirin_pcie->pci->dbi_base);
-
kirin_pcie->crgctrl =
syscon_regmap_lookup_by_compatible("hisilicon,hi3660-crgctrl");
if (IS_ERR(kirin_pcie->crgctrl))
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index b4761640ffd9..3b4f70b9f3f0 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1368,7 +1368,6 @@ static const struct dw_pcie_ops dw_pcie_ops = {
static int qcom_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
- struct resource *res;
struct pcie_port *pp;
struct dw_pcie *pci;
struct qcom_pcie *pcie;
@@ -1407,13 +1406,6 @@ static int qcom_pcie_probe(struct platform_device *pdev)
goto err_pm_runtime_put;
}
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pci->dbi_base = devm_pci_remap_cfg_resource(dev, res);
- if (IS_ERR(pci->dbi_base)) {
- ret = PTR_ERR(pci->dbi_base);
- goto err_pm_runtime_put;
- }
-
pcie->elbi = devm_platform_ioremap_resource_byname(pdev, "elbi");
if (IS_ERR(pcie->elbi)) {
ret = PTR_ERR(pcie->elbi);
diff --git a/drivers/pci/controller/dwc/pcie-spear13xx.c b/drivers/pci/controller/dwc/pcie-spear13xx.c
index e348225f651f..1ed7e3501ff1 100644
--- a/drivers/pci/controller/dwc/pcie-spear13xx.c
+++ b/drivers/pci/controller/dwc/pcie-spear13xx.c
@@ -152,6 +152,8 @@ static int spear13xx_pcie_host_init(struct pcie_port *pp)
struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
struct spear13xx_pcie *spear13xx_pcie = to_spear13xx_pcie(pci);
+ spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
+
spear13xx_pcie_establish_link(spear13xx_pcie);
spear13xx_pcie_enable_interrupts(spear13xx_pcie);
@@ -203,7 +205,6 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
struct dw_pcie *pci;
struct spear13xx_pcie *spear13xx_pcie;
struct device_node *np = dev->of_node;
- struct resource *dbi_base;
int ret;
spear13xx_pcie = devm_kzalloc(dev, sizeof(*spear13xx_pcie), GFP_KERNEL);
@@ -242,14 +243,6 @@ static int spear13xx_pcie_probe(struct platform_device *pdev)
return ret;
}
- dbi_base = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- pci->dbi_base = devm_pci_remap_cfg_resource(dev, dbi_base);
- if (IS_ERR(pci->dbi_base)) {
- ret = PTR_ERR(pci->dbi_base);
- goto fail_clk;
- }
- spear13xx_pcie->app_base = pci->dbi_base + 0x2000;
-
if (of_property_read_bool(np, "st,pcie-is-gen1"))
pci->link_gen = 1;
diff --git a/drivers/pci/controller/dwc/pcie-tegra194.c b/drivers/pci/controller/dwc/pcie-tegra194.c
index f920e7efe118..f8fca6794282 100644
--- a/drivers/pci/controller/dwc/pcie-tegra194.c
+++ b/drivers/pci/controller/dwc/pcie-tegra194.c
@@ -1907,19 +1907,12 @@ static int tegra_pcie_config_ep(struct tegra_pcie_dw *pcie,
struct dw_pcie *pci = &pcie->pci;
struct device *dev = pcie->dev;
struct dw_pcie_ep *ep;
- struct resource *res;
char *name;
int ret;
ep = &pci->ep;
ep->ops = &pcie_ep_ops;
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
ep->page_size = SZ_64K;
ret = gpiod_set_debounce(pcie->pex_rst_gpiod, PERST_DEBOUNCE_TIME);
@@ -1982,7 +1975,6 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
struct device *dev = &pdev->dev;
struct resource *atu_dma_res;
struct tegra_pcie_dw *pcie;
- struct resource *dbi_res;
struct pcie_port *pp;
struct dw_pcie *pci;
struct phy **phys;
@@ -2091,20 +2083,6 @@ static int tegra_pcie_dw_probe(struct platform_device *pdev)
pcie->phys = phys;
- dbi_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- if (!dbi_res) {
- dev_err(dev, "Failed to find \"dbi\" region\n");
- return -ENODEV;
- }
- pcie->dbi_res = dbi_res;
-
- pci->dbi_base = devm_ioremap_resource(dev, dbi_res);
- if (IS_ERR(pci->dbi_base))
- return PTR_ERR(pci->dbi_base);
-
- /* Tegra HW locates DBI2 at a fixed offset from DBI */
- pci->dbi_base2 = pci->dbi_base + 0x1000;
-
atu_dma_res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
"atu_dma");
if (!atu_dma_res) {
diff --git a/drivers/pci/controller/dwc/pcie-uniphier-ep.c b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
index 148355960061..69810c6b0d58 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier-ep.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier-ep.c
@@ -218,35 +218,6 @@ static const struct dw_pcie_ep_ops uniphier_pcie_ep_ops = {
.get_features = uniphier_pcie_get_features,
};
-static int uniphier_add_pcie_ep(struct uniphier_pcie_ep_priv *priv,
- struct platform_device *pdev)
-{
- struct dw_pcie *pci = &priv->pci;
- struct dw_pcie_ep *ep = &pci->ep;
- struct device *dev = &pdev->dev;
- struct resource *res;
- int ret;
-
- ep->ops = &uniphier_pcie_ep_ops;
-
- pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
- if (IS_ERR(pci->dbi_base2))
- return PTR_ERR(pci->dbi_base2);
-
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
- if (!res)
- return -EINVAL;
-
- ep->phys_base = res->start;
- ep->addr_size = resource_size(res);
-
- ret = dw_pcie_ep_init(ep);
- if (ret)
- dev_err(dev, "Failed to initialize endpoint (%d)\n", ret);
-
- return ret;
-}
-
static int uniphier_pcie_ep_enable(struct uniphier_pcie_ep_priv *priv)
{
int ret;
@@ -300,7 +271,6 @@ static int uniphier_pcie_ep_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct uniphier_pcie_ep_priv *priv;
- struct resource *res;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -314,11 +284,6 @@ static int uniphier_pcie_ep_probe(struct platform_device *pdev)
priv->pci.dev = dev;
priv->pci.ops = &dw_pcie_ops;
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- priv->pci.dbi_base = devm_pci_remap_cfg_resource(dev, res);
- if (IS_ERR(priv->pci.dbi_base))
- return PTR_ERR(priv->pci.dbi_base);
-
priv->base = devm_platform_ioremap_resource_byname(pdev, "link");
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
@@ -352,7 +317,8 @@ static int uniphier_pcie_ep_probe(struct platform_device *pdev)
if (ret)
return ret;
- return uniphier_add_pcie_ep(priv, pdev);
+ priv->pci.ep.ops = &uniphier_pcie_ep_ops;
+ return dw_pcie_ep_init(&priv->pci.ep);
}
static const struct pci_epc_features uniphier_pro5_data = {
diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
index 48176265c867..33130fb4af90 100644
--- a/drivers/pci/controller/dwc/pcie-uniphier.c
+++ b/drivers/pci/controller/dwc/pcie-uniphier.c
@@ -400,7 +400,6 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct uniphier_pcie_priv *priv;
- struct resource *res;
int ret;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
@@ -410,11 +409,6 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
priv->pci.dev = dev;
priv->pci.ops = &dw_pcie_ops;
- res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "dbi");
- priv->pci.dbi_base = devm_pci_remap_cfg_resource(dev, res);
- if (IS_ERR(priv->pci.dbi_base))
- return PTR_ERR(priv->pci.dbi_base);
-
priv->base = devm_platform_ioremap_resource_byname(pdev, "link");
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
--
2.25.1
^ permalink raw reply related
* [PATCH v2 00/16] PCI: dwc: Another round of clean-ups
From: Rob Herring @ 2020-11-05 21:11 UTC (permalink / raw)
To: Lorenzo Pieralisi
Cc: Kunihiko Hayashi, Neil Armstrong, linux-pci, Binghui Wang,
Bjorn Andersson, linux-tegra, Thierry Reding, linux-arm-kernel,
Thomas Petazzoni, Jonathan Chocron, Shawn Guo, Jonathan Hunter,
Fabio Estevam, Jerome Brunet, Jesper Nilsson, linux-samsung-soc,
Minghuan Lian, Kevin Hilman, Pratyush Anand, Krzysztof Kozlowski,
Kishon Vijay Abraham I, Kukjin Kim, Mingkai Hu, Xiaowei Song,
Marek Szyprowski, NXP Linux Team, Richard Zhu,
Martin Blumenstingl, linux-arm-msm, Sascha Hauer, Yue Wang,
Murali Karicheri, Bjorn Helgaas, linux-amlogic, linux-omap,
linux-arm-kernel, Roy Zang, Masahiro Yamada, Jingoo Han,
Andy Gross, Vidya Sagar, Stanimir Varbanov,
Pengutronix Kernel Team, Gustavo Pimentel, linuxppc-dev,
Lucas Stach
Here's another batch of DWC PCI host refactoring. This series primarily
moves more of the MSI, link up, and resource handling to the core
code. Beyond a couple of minor fixes, new in this version is runtime
detection of iATU regions instead of using DT properties.
No doubt I've probably broken something. Please test. I've run this thru
kernelci and checked boards with DWC PCI which currently is just
Layerscape boards (hint: add boards and/or enable PCI). A git branch is
here[1].
This is dependent on "PCI: dwc: Restore ATU memory resource setup to use
last entry" which will be in v5.10-rc3.
Rob
[1] git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git pci-more-dwc-cleanup
Rob Herring (16):
PCI: dwc: Support multiple ATU memory regions
PCI: dwc/intel-gw: Move ATU offset out of driver match data
PCI: dwc: Move "dbi", "dbi2", and "addr_space" resource setup into
common code
PCI: dwc/intel-gw: Remove some unneeded function wrappers
PCI: dwc: Ensure all outbound ATU windows are reset
PCI: dwc/dra7xx: Use the common MSI irq_chip
PCI: dwc: Drop the .set_num_vectors() host op
PCI: dwc: Move MSI interrupt setup into DWC common code
PCI: dwc: Rework MSI initialization
PCI: dwc: Move link handling into common code
PCI: dwc: Move dw_pcie_msi_init() into core
PCI: dwc: Move dw_pcie_setup_rc() to DWC common code
PCI: dwc: Remove unnecessary wrappers around dw_pcie_host_init()
Revert "PCI: dwc/keystone: Drop duplicated 'num-viewport'"
PCI: dwc: Move inbound and outbound windows to common struct
PCI: dwc: Detect number of iATU windows
drivers/pci/controller/dwc/pci-dra7xx.c | 141 +-----------------
drivers/pci/controller/dwc/pci-exynos.c | 50 ++-----
drivers/pci/controller/dwc/pci-imx6.c | 39 +----
drivers/pci/controller/dwc/pci-keystone.c | 79 ++--------
.../pci/controller/dwc/pci-layerscape-ep.c | 37 +----
drivers/pci/controller/dwc/pci-layerscape.c | 67 +--------
drivers/pci/controller/dwc/pci-meson.c | 53 ++-----
drivers/pci/controller/dwc/pcie-al.c | 29 +---
drivers/pci/controller/dwc/pcie-armada8k.c | 37 ++---
drivers/pci/controller/dwc/pcie-artpec6.c | 76 +---------
.../pci/controller/dwc/pcie-designware-ep.c | 58 +++----
.../pci/controller/dwc/pcie-designware-host.c | 139 ++++++++++-------
.../pci/controller/dwc/pcie-designware-plat.c | 70 +--------
drivers/pci/controller/dwc/pcie-designware.c | 93 +++++++++++-
drivers/pci/controller/dwc/pcie-designware.h | 24 +--
drivers/pci/controller/dwc/pcie-histb.c | 37 ++---
drivers/pci/controller/dwc/pcie-intel-gw.c | 67 ++-------
drivers/pci/controller/dwc/pcie-kirin.c | 62 +-------
drivers/pci/controller/dwc/pcie-qcom.c | 38 +----
drivers/pci/controller/dwc/pcie-spear13xx.c | 62 +++-----
drivers/pci/controller/dwc/pcie-tegra194.c | 41 +----
drivers/pci/controller/dwc/pcie-uniphier-ep.c | 38 +----
drivers/pci/controller/dwc/pcie-uniphier.c | 51 +------
23 files changed, 356 insertions(+), 1032 deletions(-)
--
2.25.1
^ permalink raw reply
* Re: [PATCH 03/18] powerpc: bad_page_fault, do_break get registers from regs
From: kernel test robot @ 2020-11-05 20:43 UTC (permalink / raw)
To: Nicholas Piggin, linuxppc-dev; +Cc: kbuild-all, Nicholas Piggin
In-Reply-To: <20201105143431.1874789-4-npiggin@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 3374 bytes --]
Hi Nicholas,
I love your patch! Yet something to improve:
[auto build test ERROR on powerpc/next]
[also build test ERROR on v5.10-rc2 next-20201105]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]
url: https://github.com/0day-ci/linux/commits/Nicholas-Piggin/powerpc-interrupt-wrappers/20201105-231909
base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next
config: powerpc-allnoconfig (attached as .config)
compiler: powerpc-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://github.com/0day-ci/linux/commit/4232a616cd2a8f7ef6b3f19cd656690dc5ec4c9e
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Nicholas-Piggin/powerpc-interrupt-wrappers/20201105-231909
git checkout 4232a616cd2a8f7ef6b3f19cd656690dc5ec4c9e
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All errors (new ones prefixed by >>):
In file included from include/asm-generic/bug.h:5,
from arch/powerpc/include/asm/bug.h:109,
from include/linux/bug.h:5,
from include/linux/signal.h:5,
from arch/powerpc/mm/fault.c:14:
arch/powerpc/mm/fault.c: In function '__do_page_fault':
>> arch/powerpc/mm/fault.c:378:43: error: suggest parentheses around arithmetic in operand of '|' [-Werror=parentheses]
378 | #define page_fault_is_bad(__err) ((__err) & DSISR_BAD_FAULT_32S | DSISR_DABRMATCH)
include/linux/compiler.h:78:42: note: in definition of macro 'unlikely'
78 | # define unlikely(x) __builtin_expect(!!(x), 0)
| ^
arch/powerpc/mm/fault.c:410:15: note: in expansion of macro 'page_fault_is_bad'
410 | if (unlikely(page_fault_is_bad(error_code))) {
| ^~~~~~~~~~~~~~~~~
cc1: all warnings being treated as errors
vim +378 arch/powerpc/mm/fault.c
361
362 /*
363 * Define the correct "is_write" bit in error_code based
364 * on the processor family
365 */
366 #if (defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
367 #define page_fault_is_write(__err) ((__err) & ESR_DST)
368 #define page_fault_is_bad(__err) (0)
369 #else
370 #define page_fault_is_write(__err) ((__err) & DSISR_ISSTORE)
371 #if defined(CONFIG_PPC_8xx)
372 #define page_fault_is_bad(__err) ((__err) & DSISR_NOEXEC_OR_G)
373 #elif defined(CONFIG_PPC_BOOK3S_64)
374 #define page_fault_is_bad(__err) ((__err) & (DSISR_BAD_FAULT_64S | DSISR_DABRMATCH))
375 #elif defined(CONFIG_PPC_BOOK3E_64)
376 #define page_fault_is_bad(__err) ((__err) & DSISR_BAD_FAULT_64S)
377 #else
> 378 #define page_fault_is_bad(__err) ((__err) & DSISR_BAD_FAULT_32S | DSISR_DABRMATCH)
379 #endif
380 #endif
381
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 6452 bytes --]
^ permalink raw reply
* Re: [PATCH 2/2] dt-bindings: misc: convert fsl,qoriq-mc from txt to YAML
From: Laurentiu Tudor @ 2020-11-05 19:26 UTC (permalink / raw)
To: Rob Herring
Cc: devicetree, corbet, netdev, linux-doc, linux-kernel, leoyang.li,
ioana.ciornei, Ionut-robert Aron, kuba, linuxppc-dev, davem,
linux-arm-kernel
In-Reply-To: <20201105191745.GB1644330@bogus>
Hi Rob,
On 11/5/2020 9:17 PM, Rob Herring wrote:
> On Thu, Nov 05, 2020 at 04:11:14PM +0200, Laurentiu Tudor wrote:
>> From: Ionut-robert Aron <ionut-robert.aron@nxp.com>
>>
>> Convert fsl,qoriq-mc to YAML in order to automate the verification
>> process of dts files. In addition, update MAINTAINERS accordingly
>> and, while at it, add some missing files.
>>
>> Signed-off-by: Ionut-robert Aron <ionut-robert.aron@nxp.com>
>> [laurentiu.tudor@nxp.com: update MINTAINERS, updates & fixes in schema]
>> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
>> ---
>> .../devicetree/bindings/misc/fsl,qoriq-mc.txt | 196 ----------------
>> .../bindings/misc/fsl,qoriq-mc.yaml | 218 ++++++++++++++++++
>> .../ethernet/freescale/dpaa2/overview.rst | 5 +-
>> MAINTAINERS | 4 +-
>> 4 files changed, 225 insertions(+), 198 deletions(-)
>> delete mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
>> create mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
>
> [...]
>
>> diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
>> new file mode 100644
>> index 000000000000..9e89fd8eb635
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
>> @@ -0,0 +1,218 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +# Copyright 2020 NXP
>> +%YAML 1.2
>> +---
>> +$id: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fmisc%2Ffsl%2Cqoriq-mc.yaml%23&data=04%7C01%7Claurentiu.tudor%40nxp.com%7C64a5aeb6fee5459041db08d881bf7bf2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637402006701140599%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=fkXEIYUqXK1Dn6AqZtYLzro8nwJNCPJFI1Q9F9fRYxE%3D&reserved=0
>> +$schema: https://eur01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23&data=04%7C01%7Claurentiu.tudor%40nxp.com%7C64a5aeb6fee5459041db08d881bf7bf2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637402006701140599%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=X7k0Sxh7uPo11GgkGCeaKKMzHdu0gtphKheyJeROZ9Q%3D&reserved=0
>> +
>> +maintainers:
>> + - Laurentiu Tudor <laurentiu.tudor@nxp.com>
>> +
>> +title: Freescale Management Complex
>> +
>> +description: |
>> + The Freescale Management Complex (fsl-mc) is a hardware resource
>> + manager that manages specialized hardware objects used in
>> + network-oriented packet processing applications. After the fsl-mc
>> + block is enabled, pools of hardware resources are available, such as
>> + queues, buffer pools, I/O interfaces. These resources are building
>> + blocks that can be used to create functional hardware objects/devices
>> + such as network interfaces, crypto accelerator instances, L2 switches,
>> + etc.
>> +
>> + For an overview of the DPAA2 architecture and fsl-mc bus see:
>> + Documentation/networking/device_drivers/freescale/dpaa2/overview.rst
>> +
>> + As described in the above overview, all DPAA2 objects in a DPRC share the
>> + same hardware "isolation context" and a 10-bit value called an ICID
>> + (isolation context id) is expressed by the hardware to identify
>> + the requester.
>> +
>> + The generic 'iommus' property is insufficient to describe the relationship
>> + between ICIDs and IOMMUs, so an iommu-map property is used to define
>> + the set of possible ICIDs under a root DPRC and how they map to
>> + an IOMMU.
>> +
>> + For generic IOMMU bindings, see:
>> + Documentation/devicetree/bindings/iommu/iommu.txt.
>> +
>> + For arm-smmu binding, see:
>> + Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
>> +
>> + MC firmware binary images can be found here:
>> + https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2FNXP%2Fqoriq-mc-binary&data=04%7C01%7Claurentiu.tudor%40nxp.com%7C64a5aeb6fee5459041db08d881bf7bf2%7C686ea1d3bc2b4c6fa92cd99c5c301635%7C0%7C0%7C637402006701140599%7CUnknown%7CTWFpbGZsb3d8eyJWIjoiMC4wLjAwMDAiLCJQIjoiV2luMzIiLCJBTiI6Ik1haWwiLCJXVCI6Mn0%3D%7C1000&sdata=QKyEydXdS2AzqS7BlXVXDXpdjHfGL1%2BEdx95F1j5OHM%3D&reserved=0
>> +
>> +properties:
>> + compatible:
>> + const: "fsl,qoriq-mc"
>
> Don't need quotes.
>
>> + description: "Must be 'fsl,qoriq-mc'. A Freescale Management Complex
>
> Drop ^^^^^^^^^^^^^^^^^^^^^^^^
>
> The schema says that.
>
>> + compatible with this binding must have Block Revision
>> + Registers BRR1 and BRR2 at offset 0x0BF8 and 0x0BFC in
>> + the MC control register region."
>> +
>> + reg:
>> + description: "A standard property. Specifies one or two regions defining
>
> Don't need quotes. You need '|' for a literal block to keep formatting.
>
> But all this should be expressed as schema...
>
>> + the MC's registers:
>> +
>> + - the first region is the command portal for the this machine
>> + and must always be present
>> +
>> + - the second region is the MC control registers. This region
>> + may not be present in some scenarios, such as in the device
>> + tree presented to a virtual machine."
>
> reg:
> minItems: 1
> items:
> - description: the command portal for the this machine
> - description: MC control registers. This region may not be present
> in some scenarios, such as in the device tree presented to a
> virtual machine.
>
>> +
>> + ranges:
>> + description: "A standard property. Defines the mapping between the child
>> + MC address space and the parent system address space.
>> +
>> + The MC address space is defined by 3 components:
>> + <region type> <offset hi> <offset lo>
>> +
>> + Valid values for region type are:
>> + 0x0 - MC portals
>> + 0x1 - QBMAN portals"
>> +
>> + '#address-cells':
>> + const: 3
>> +
>> + '#size-cells':
>> + const: 1
>> +
>> + dpmacs:
>> + type: object
>> + description: "The fsl-mc node may optionally have dpmac sub-nodes that
>> + describe the relationship between the Ethernet MACs which belong
>> + to the MC and the Ethernet PHYs on the system board.
>> +
>> + The dpmac nodes must be under a node named 'dpmacs' which
>> + contains the following properties:
>> +
>> + - '#address-cells'
>> + const: 1
>> + description: Must be present if dpmac sub-nodes are defined
>> + and must have a value of 1.
>> +
>> + - '#size-cells'
>> + const: 0
>> + description: Must be present if dpmac sub-nodes are defined
>> + and must have a value of 0."
>
> Drop whatever description can be expressed in schemas.
>
>> +
>> + properties:
>> + '#address-cells':
>> + const: 1
>> +
>> + '#size-cells':
>> + const: 0
>> +
>> + patternProperties:
>> + "^dpmac@[0-9a-f]+$":
>> + type: object
>> +
>> + description: "dpmac sub-node that describes the relationship between the
>> + Ethernet MACs which belong to the MC and the Ethernet PHYs
>> + on the system board."
>> +
>> + properties:
>> + compatible:
>> + const: "fsl,qoriq-mc-dpmac"
>> +
>> + reg:
>> + description: Specifies the id of the dpmac
>
> Constraints on the value?
>
Thanks a lot for taking a look. Will take care in the next spin.
PS. Nice work on the validation tools. My ~1 month old version didn't
catch those errors.
---
Best Regards, Laurentiu
^ permalink raw reply
* Re: [PATCH 2/2] dt-bindings: misc: convert fsl,qoriq-mc from txt to YAML
From: Rob Herring @ 2020-11-05 19:17 UTC (permalink / raw)
To: Laurentiu Tudor
Cc: devicetree, corbet, netdev, linux-doc, linux-kernel, leoyang.li,
ioana.ciornei, Ionut-robert Aron, kuba, linuxppc-dev, davem,
linux-arm-kernel
In-Reply-To: <20201105141114.18161-2-laurentiu.tudor@nxp.com>
On Thu, Nov 05, 2020 at 04:11:14PM +0200, Laurentiu Tudor wrote:
> From: Ionut-robert Aron <ionut-robert.aron@nxp.com>
>
> Convert fsl,qoriq-mc to YAML in order to automate the verification
> process of dts files. In addition, update MAINTAINERS accordingly
> and, while at it, add some missing files.
>
> Signed-off-by: Ionut-robert Aron <ionut-robert.aron@nxp.com>
> [laurentiu.tudor@nxp.com: update MINTAINERS, updates & fixes in schema]
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> ---
> .../devicetree/bindings/misc/fsl,qoriq-mc.txt | 196 ----------------
> .../bindings/misc/fsl,qoriq-mc.yaml | 218 ++++++++++++++++++
> .../ethernet/freescale/dpaa2/overview.rst | 5 +-
> MAINTAINERS | 4 +-
> 4 files changed, 225 insertions(+), 198 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
> create mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
[...]
> diff --git a/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
> new file mode 100644
> index 000000000000..9e89fd8eb635
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
> @@ -0,0 +1,218 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2020 NXP
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/misc/fsl,qoriq-mc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +maintainers:
> + - Laurentiu Tudor <laurentiu.tudor@nxp.com>
> +
> +title: Freescale Management Complex
> +
> +description: |
> + The Freescale Management Complex (fsl-mc) is a hardware resource
> + manager that manages specialized hardware objects used in
> + network-oriented packet processing applications. After the fsl-mc
> + block is enabled, pools of hardware resources are available, such as
> + queues, buffer pools, I/O interfaces. These resources are building
> + blocks that can be used to create functional hardware objects/devices
> + such as network interfaces, crypto accelerator instances, L2 switches,
> + etc.
> +
> + For an overview of the DPAA2 architecture and fsl-mc bus see:
> + Documentation/networking/device_drivers/freescale/dpaa2/overview.rst
> +
> + As described in the above overview, all DPAA2 objects in a DPRC share the
> + same hardware "isolation context" and a 10-bit value called an ICID
> + (isolation context id) is expressed by the hardware to identify
> + the requester.
> +
> + The generic 'iommus' property is insufficient to describe the relationship
> + between ICIDs and IOMMUs, so an iommu-map property is used to define
> + the set of possible ICIDs under a root DPRC and how they map to
> + an IOMMU.
> +
> + For generic IOMMU bindings, see:
> + Documentation/devicetree/bindings/iommu/iommu.txt.
> +
> + For arm-smmu binding, see:
> + Documentation/devicetree/bindings/iommu/arm,smmu.yaml.
> +
> + MC firmware binary images can be found here:
> + https://github.com/NXP/qoriq-mc-binary
> +
> +properties:
> + compatible:
> + const: "fsl,qoriq-mc"
Don't need quotes.
> + description: "Must be 'fsl,qoriq-mc'. A Freescale Management Complex
Drop ^^^^^^^^^^^^^^^^^^^^^^^^
The schema says that.
> + compatible with this binding must have Block Revision
> + Registers BRR1 and BRR2 at offset 0x0BF8 and 0x0BFC in
> + the MC control register region."
> +
> + reg:
> + description: "A standard property. Specifies one or two regions defining
Don't need quotes. You need '|' for a literal block to keep formatting.
But all this should be expressed as schema...
> + the MC's registers:
> +
> + - the first region is the command portal for the this machine
> + and must always be present
> +
> + - the second region is the MC control registers. This region
> + may not be present in some scenarios, such as in the device
> + tree presented to a virtual machine."
reg:
minItems: 1
items:
- description: the command portal for the this machine
- description: MC control registers. This region may not be present
in some scenarios, such as in the device tree presented to a
virtual machine.
> +
> + ranges:
> + description: "A standard property. Defines the mapping between the child
> + MC address space and the parent system address space.
> +
> + The MC address space is defined by 3 components:
> + <region type> <offset hi> <offset lo>
> +
> + Valid values for region type are:
> + 0x0 - MC portals
> + 0x1 - QBMAN portals"
> +
> + '#address-cells':
> + const: 3
> +
> + '#size-cells':
> + const: 1
> +
> + dpmacs:
> + type: object
> + description: "The fsl-mc node may optionally have dpmac sub-nodes that
> + describe the relationship between the Ethernet MACs which belong
> + to the MC and the Ethernet PHYs on the system board.
> +
> + The dpmac nodes must be under a node named 'dpmacs' which
> + contains the following properties:
> +
> + - '#address-cells'
> + const: 1
> + description: Must be present if dpmac sub-nodes are defined
> + and must have a value of 1.
> +
> + - '#size-cells'
> + const: 0
> + description: Must be present if dpmac sub-nodes are defined
> + and must have a value of 0."
Drop whatever description can be expressed in schemas.
> +
> + properties:
> + '#address-cells':
> + const: 1
> +
> + '#size-cells':
> + const: 0
> +
> + patternProperties:
> + "^dpmac@[0-9a-f]+$":
> + type: object
> +
> + description: "dpmac sub-node that describes the relationship between the
> + Ethernet MACs which belong to the MC and the Ethernet PHYs
> + on the system board."
> +
> + properties:
> + compatible:
> + const: "fsl,qoriq-mc-dpmac"
> +
> + reg:
> + description: Specifies the id of the dpmac
Constraints on the value?
> +
> + phy-handle:
> + $ref: /schemas/types.yaml#definitions/phandle
> + description: "Specifies the phandle to the PHY device node
> + associated with the this dpmac."
> +
> + required:
> + - compatible
> + - reg
> + - phy-handle
> +
> + iommu-map:
> + description: |
> + Maps an ICID to an IOMMU and associated iommu-specifier data.
> +
> + The property is an arbitrary number of tuples of
> + (icid-base, iommu, iommu-base, length).
> +
> + Any ICID i in the interval [icid-base, icid-base + length) is
> + associated with the listed IOMMU, with the iommu-specifier
> + (i - icid-base + iommu-base).
> +
> + msi-map:
> + description: |
> + Maps an ICID to a GIC ITS and associated msi-specifier data.
> +
> + The property is an arbitrary number of tuples of
> + (icid-base, gic-its, msi-base, length).
> +
> + Any ICID in the interval [icid-base, icid-base + length) is
> + associated with the listed GIC ITS, with the msi-specifier
> + (i - icid-base + msi-base).
> +
> + msi-parent:
> + deprecated: true
> + description: "Points to the MSI controller node handling message interrupts
> + for the MC."
> +
> +required:
> + - compatible
> + - reg
> + - iommu-map
> + - msi-map
> + - ranges
> + - '#address-cells'
> + - '#size-cells'
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + smmu: iommu@5000000 {
> + compatible = "arm,mmu-500";
> + #global-interrupts = <1>;
> + #iommu-cells = <1>;
> + reg = <0 0x5000000 0 0x800000>;
> + stream-match-mask = <0x7c00>;
> + interrupts = <0 13 4>,
> + <0 146 4>, <0 147 4>,
> + <0 148 4>, <0 149 4>,
> + <0 150 4>, <0 151 4>,
> + <0 152 4>, <0 153 4>;
> + };
> +
> + fsl_mc: fsl-mc@80c000000 {
> + compatible = "fsl,qoriq-mc";
> + reg = <0x00000008 0x0c000000 0 0x40>, /* MC portal base */
> + <0x00000000 0x08340000 0 0x40000>; /* MC control reg */
> + /* define map for ICIDs 23-64 */
> + iommu-map = <23 &smmu 23 41>;
> + /* define msi map for ICIDs 23-64 */
> + msi-map = <23 &its 23 41>;
> + #address-cells = <3>;
> + #size-cells = <1>;
> +
> + /*
> + * Region type 0x0 - MC portals
> + * Region type 0x1 - QBMAN portals
> + */
> + ranges = <0x0 0x0 0x0 0x8 0x0c000000 0x4000000
> + 0x1 0x0 0x0 0x8 0x18000000 0x8000000>;
> +
> + dpmacs {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + dpmac@1 {
> + compatible = "fsl,qoriq-mc-dpmac";
> + reg = <1>;
> + phy-handle = <&mdio0_phy0>;
> + };
> + };
> + };
> + };
> diff --git a/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst b/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> index d638b5a8aadd..b3261c5871cc 100644
> --- a/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> +++ b/Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> @@ -28,6 +28,9 @@ interfaces, an L2 switch, or accelerator instances.
> The MC provides memory-mapped I/O command interfaces (MC portals)
> which DPAA2 software drivers use to operate on DPAA2 objects.
>
> +MC firmware binary images can be found here:
> +https://github.com/NXP/qoriq-mc-binary
> +
> The diagram below shows an overview of the DPAA2 resource management
> architecture::
>
> @@ -338,7 +341,7 @@ Key functions include:
> a bind of the root DPRC to the DPRC driver
>
> The binding for the MC-bus device-tree node can be consulted at
> -*Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt*.
> +*Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml*.
> The sysfs bind/unbind interfaces for the MC-bus can be consulted at
> *Documentation/ABI/testing/sysfs-bus-fsl-mc*.
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b43b59542d15..400a17c90edb 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -14409,9 +14409,11 @@ M: Stuart Yoder <stuyoder@gmail.com>
> M: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> L: linux-kernel@vger.kernel.org
> S: Maintained
> -F: Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
> +F: Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml
> +F: Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
> F: Documentation/networking/device_drivers/ethernet/freescale/dpaa2/overview.rst
> F: drivers/bus/fsl-mc/
> +F: include/linux/fsl/mc.h
>
> QT1010 MEDIA DRIVER
> M: Antti Palosaari <crope@iki.fi>
> --
> 2.17.1
>
^ permalink raw reply
* Re: [PATCH 2/2] dt-bindings: misc: convert fsl,qoriq-mc from txt to YAML
From: Rob Herring @ 2020-11-05 19:07 UTC (permalink / raw)
To: Laurentiu Tudor
Cc: devicetree, linux-doc, netdev, corbet, linux-kernel, leoyang.li,
robh+dt, ioana.ciornei, Ionut-robert Aron, kuba, linuxppc-dev,
davem, linux-arm-kernel
In-Reply-To: <20201105141114.18161-2-laurentiu.tudor@nxp.com>
On Thu, 05 Nov 2020 16:11:14 +0200, Laurentiu Tudor wrote:
> From: Ionut-robert Aron <ionut-robert.aron@nxp.com>
>
> Convert fsl,qoriq-mc to YAML in order to automate the verification
> process of dts files. In addition, update MAINTAINERS accordingly
> and, while at it, add some missing files.
>
> Signed-off-by: Ionut-robert Aron <ionut-robert.aron@nxp.com>
> [laurentiu.tudor@nxp.com: update MINTAINERS, updates & fixes in schema]
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> ---
> .../devicetree/bindings/misc/fsl,qoriq-mc.txt | 196 ----------------
> .../bindings/misc/fsl,qoriq-mc.yaml | 218 ++++++++++++++++++
> .../ethernet/freescale/dpaa2/overview.rst | 5 +-
> MAINTAINERS | 4 +-
> 4 files changed, 225 insertions(+), 198 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.txt
> create mode 100644 Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
./Documentation/devicetree/bindings/misc/fsl,qoriq-mc.yaml:128:9: [warning] wrong indentation: expected 10 but found 8 (indentation)
dtschema/dtc warnings/errors:
See https://patchwork.ozlabs.org/patch/1395017
The base for the patch is generally the last rc1. Any dependencies
should be noted.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit.
^ permalink raw reply
* Re: [PATCH 1/2] dt-bindings: misc: convert fsl, dpaa2-console from txt to YAML
From: Rob Herring @ 2020-11-05 19:06 UTC (permalink / raw)
To: Laurentiu Tudor
Cc: devicetree, corbet, netdev, linux-doc, linux-kernel, leoyang.li,
robh+dt, ioana.ciornei, Ionut-robert Aron, kuba, linuxppc-dev,
davem, linux-arm-kernel
In-Reply-To: <20201105141114.18161-1-laurentiu.tudor@nxp.com>
On Thu, 05 Nov 2020 16:11:13 +0200, Laurentiu Tudor wrote:
> From: Ionut-robert Aron <ionut-robert.aron@nxp.com>
>
> Convert fsl,dpaa2-console to YAML in order to automate the
> verification process of dts files.
>
> Signed-off-by: Ionut-robert Aron <ionut-robert.aron@nxp.com>
> Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> ---
> .../bindings/misc/fsl,dpaa2-console.txt | 11 ---------
> .../bindings/misc/fsl,dpaa2-console.yaml | 23 +++++++++++++++++++
> 2 files changed, 23 insertions(+), 11 deletions(-)
> delete mode 100644 Documentation/devicetree/bindings/misc/fsl,dpaa2-console.txt
> create mode 100644 Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml: 'additionalProperties' is a required property
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml: ignoring, error in schema:
warning: no schema found in file: ./Documentation/devicetree/bindings/misc/fsl,dpaa2-console.yaml
See https://patchwork.ozlabs.org/patch/1395015
The base for the patch is generally the last rc1. Any dependencies
should be noted.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit.
^ permalink raw reply
* Re: [PATCH] powerpc: topology.h: fix build when CONFIG_NUMA=n
From: Christophe Leroy @ 2020-11-05 17:34 UTC (permalink / raw)
To: Scott Cheloha, linuxppc-dev
Cc: Nathan Lynch, Laurent Dufour, kernel test robot
In-Reply-To: <20201105162018.3559108-1-cheloha@linux.ibm.com>
Le 05/11/2020 à 17:20, Scott Cheloha a écrit :
> Add a non-NUMA definition for of_drconf_to_nid_single() to topology.h
> so we have one even if powerpc/mm/numa.c is not compiled. On a non-NUMA
> kernel the appropriate node id is always first_online_node.
>
> Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com>
> Reported-by: kernel test robot <lkp@intel.com>
> Fixes: 72cdd117c449 ("pseries/hotplug-memory: hot-add: skip redundant LMB lookup")
> ---
> arch/powerpc/include/asm/topology.h | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
> index 8728590f514a..90d2424418b5 100644
> --- a/arch/powerpc/include/asm/topology.h
> +++ b/arch/powerpc/include/asm/topology.h
> @@ -61,6 +61,10 @@ static inline int early_cpu_to_node(int cpu)
> */
> return (nid < 0) ? 0 : nid;
> }
> +
> +struct drmem_lmb;
Can you put that before the #ifdef CONFIG_NUMA in order to avoid duplicating it ?
> +extern int of_drconf_to_nid_single(struct drmem_lmb *lmb);
'extern' keywork is useless on a function prototype, don't add one, keep the prototype as before, ie:
int of_drconf_to_nid_single(struct drmem_lmb *lmb);
> +
> #else
>
> static inline int early_cpu_to_node(int cpu) { return 0; }
> @@ -84,10 +88,13 @@ static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
> return 0;
> }
>
> -#endif /* CONFIG_NUMA */
> -
> struct drmem_lmb;
Can you put that before the #ifdef CONFIG_NUMA in order to avoid duplicating it ?
> -int of_drconf_to_nid_single(struct drmem_lmb *lmb);
> +static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
> +{
> + return first_online_node;
> +}
> +
> +#endif /* CONFIG_NUMA */
>
> #if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
> extern int find_and_online_cpu_nid(int cpu);
>
Christophe
^ permalink raw reply
* [PATCH] powerpc: topology.h: fix build when CONFIG_NUMA=n
From: Scott Cheloha @ 2020-11-05 16:20 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nathan Lynch, Laurent Dufour, kernel test robot
Add a non-NUMA definition for of_drconf_to_nid_single() to topology.h
so we have one even if powerpc/mm/numa.c is not compiled. On a non-NUMA
kernel the appropriate node id is always first_online_node.
Signed-off-by: Scott Cheloha <cheloha@linux.ibm.com>
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 72cdd117c449 ("pseries/hotplug-memory: hot-add: skip redundant LMB lookup")
---
arch/powerpc/include/asm/topology.h | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/topology.h b/arch/powerpc/include/asm/topology.h
index 8728590f514a..90d2424418b5 100644
--- a/arch/powerpc/include/asm/topology.h
+++ b/arch/powerpc/include/asm/topology.h
@@ -61,6 +61,10 @@ static inline int early_cpu_to_node(int cpu)
*/
return (nid < 0) ? 0 : nid;
}
+
+struct drmem_lmb;
+extern int of_drconf_to_nid_single(struct drmem_lmb *lmb);
+
#else
static inline int early_cpu_to_node(int cpu) { return 0; }
@@ -84,10 +88,13 @@ static inline int cpu_distance(__be32 *cpu1_assoc, __be32 *cpu2_assoc)
return 0;
}
-#endif /* CONFIG_NUMA */
-
struct drmem_lmb;
-int of_drconf_to_nid_single(struct drmem_lmb *lmb);
+static inline int of_drconf_to_nid_single(struct drmem_lmb *lmb)
+{
+ return first_online_node;
+}
+
+#endif /* CONFIG_NUMA */
#if defined(CONFIG_NUMA) && defined(CONFIG_PPC_SPLPAR)
extern int find_and_online_cpu_nid(int cpu);
--
2.28.0
^ permalink raw reply related
* [Bug 209869] Kernel 5.10-rc1 fails to boot on a PowerMac G4 3,6 at an early stage
From: bugzilla-daemon @ 2020-11-05 16:13 UTC (permalink / raw)
To: linuxppc-dev
In-Reply-To: <bug-209869-206035@https.bugzilla.kernel.org/>
https://bugzilla.kernel.org/show_bug.cgi?id=209869
--- Comment #10 from Erhard F. (erhard_f@mailbox.org) ---
(In reply to Christophe Leroy from comment #9)
> Ok, what about 5.10-rc1 + KASAN without reverting the patch ?
Nope, does not boot. Same 5.10-rc1 .config + KASAN but without reverting the
patch.
--
You are receiving this mail because:
You are watching the assignee of the bug.
^ permalink raw reply
* [PATCH 17/18] powerpc/64s: power4 nap fixup in C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
There is no need for this to be in asm, use the new intrrupt entry wrapper.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 15 +++++++++
arch/powerpc/include/asm/processor.h | 1 +
arch/powerpc/include/asm/thread_info.h | 6 ++++
arch/powerpc/kernel/exceptions-64s.S | 45 --------------------------
arch/powerpc/kernel/idle_book3s.S | 4 +++
5 files changed, 26 insertions(+), 45 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 46846fe332b9..133dbe9db12b 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -8,6 +8,16 @@
#include <asm/ftrace.h>
#include <asm/runlatch.h>
+static inline void nap_adjust_return(struct pt_regs *regs)
+{
+#ifdef CONFIG_PPC_970_NAP
+ if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
+ clear_thread_local_flags(_TLF_NAPPING);
+ regs->nip = (unsigned long)power4_idle_nap_return;
+ }
+#endif
+}
+
struct interrupt_state {
#ifdef CONFIG_PPC_BOOK3E_64
enum ctx_state ctx_state;
@@ -73,6 +83,9 @@ static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct in
static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
interrupt_exit_prepare(regs, state);
+
+ /* Adjust at exit so the main handler sees the true NIA */
+ nap_adjust_return(regs);
}
struct interrupt_nmi_state {
@@ -123,6 +136,8 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter
radix_enabled() || (mfmsr() & MSR_DR))
nmi_exit();
+ nap_adjust_return(regs);
+
#ifdef CONFIG_PPC64
this_cpu_set_ftrace_enabled(state->ftrace_enabled);
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index c61c859b51a8..d845850f75e2 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -418,6 +418,7 @@ extern unsigned long isa300_idle_stop_mayloss(unsigned long psscr_val);
extern unsigned long isa206_idle_insn_mayloss(unsigned long type);
#ifdef CONFIG_PPC_970_NAP
extern void power4_idle_nap(void);
+void power4_idle_nap_return(void);
#endif
extern unsigned long cpuidle_disable;
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index c9443c16e5fb..e7ee220b88ea 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -151,6 +151,12 @@ void arch_setup_new_exec(void);
#ifndef __ASSEMBLY__
+static inline void clear_thread_local_flags(unsigned int flags)
+{
+ struct thread_info *ti = current_thread_info();
+ ti->local_flags &= ~flags;
+}
+
static inline bool test_thread_local_flags(unsigned int flags)
{
struct thread_info *ti = current_thread_info();
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 227bad3a586d..1db6b3438c88 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -692,25 +692,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
ld r1,GPR1(r1)
.endm
-/*
- * When the idle code in power4_idle puts the CPU into NAP mode,
- * it has to do so in a loop, and relies on the external interrupt
- * and decrementer interrupt entry code to get it out of the loop.
- * It sets the _TLF_NAPPING bit in current_thread_info()->local_flags
- * to signal that it is in the loop and needs help to get out.
- */
-#ifdef CONFIG_PPC_970_NAP
-#define FINISH_NAP \
-BEGIN_FTR_SECTION \
- ld r11, PACA_THREAD_INFO(r13); \
- ld r9,TI_LOCAL_FLAGS(r11); \
- andi. r10,r9,_TLF_NAPPING; \
- bnel power4_fixup_nap; \
-END_FTR_SECTION_IFSET(CPU_FTR_CAN_NAP)
-#else
-#define FINISH_NAP
-#endif
-
/*
* There are a few constraints to be concerned with.
* - Real mode exceptions code/data must be located at their physical location.
@@ -1250,7 +1231,6 @@ EXC_COMMON_BEGIN(machine_check_common)
*/
GEN_COMMON machine_check
- FINISH_NAP
/* Enable MSR_RI when finished with PACA_EXMC */
li r10,MSR_RI
mtmsrd r10,1
@@ -1572,7 +1552,6 @@ EXC_VIRT_BEGIN(hardware_interrupt, 0x4500, 0x100)
EXC_VIRT_END(hardware_interrupt, 0x4500, 0x100)
EXC_COMMON_BEGIN(hardware_interrupt_common)
GEN_COMMON hardware_interrupt
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -1757,7 +1736,6 @@ EXC_VIRT_BEGIN(decrementer, 0x4900, 0x80)
EXC_VIRT_END(decrementer, 0x4900, 0x80)
EXC_COMMON_BEGIN(decrementer_common)
GEN_COMMON decrementer
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl timer_interrupt
b interrupt_return
@@ -1842,7 +1820,6 @@ EXC_VIRT_BEGIN(doorbell_super, 0x4a00, 0x100)
EXC_VIRT_END(doorbell_super, 0x4a00, 0x100)
EXC_COMMON_BEGIN(doorbell_super_common)
GEN_COMMON doorbell_super
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2196,7 +2173,6 @@ EXC_COMMON_BEGIN(hmi_exception_early_common)
EXC_COMMON_BEGIN(hmi_exception_common)
GEN_COMMON hmi_exception
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl handle_hmi_exception
b interrupt_return
@@ -2225,7 +2201,6 @@ EXC_VIRT_BEGIN(h_doorbell, 0x4e80, 0x20)
EXC_VIRT_END(h_doorbell, 0x4e80, 0x20)
EXC_COMMON_BEGIN(h_doorbell_common)
GEN_COMMON h_doorbell
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2258,7 +2233,6 @@ EXC_VIRT_BEGIN(h_virt_irq, 0x4ea0, 0x20)
EXC_VIRT_END(h_virt_irq, 0x4ea0, 0x20)
EXC_COMMON_BEGIN(h_virt_irq_common)
GEN_COMMON h_virt_irq
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -2304,7 +2278,6 @@ EXC_VIRT_BEGIN(performance_monitor, 0x4f00, 0x20)
EXC_VIRT_END(performance_monitor, 0x4f00, 0x20)
EXC_COMMON_BEGIN(performance_monitor_common)
GEN_COMMON performance_monitor
- FINISH_NAP
addi r3,r1,STACK_FRAME_OVERHEAD
bl performance_monitor_exception
b interrupt_return
@@ -3032,24 +3005,6 @@ USE_FIXED_SECTION(virt_trampolines)
__end_interrupts:
DEFINE_FIXED_SYMBOL(__end_interrupts)
-#ifdef CONFIG_PPC_970_NAP
- /*
- * Called by exception entry code if _TLF_NAPPING was set, this clears
- * the NAPPING flag, and redirects the exception exit to
- * power4_fixup_nap_return.
- */
- .globl power4_fixup_nap
-EXC_COMMON_BEGIN(power4_fixup_nap)
- andc r9,r9,r10
- std r9,TI_LOCAL_FLAGS(r11)
- LOAD_REG_ADDR(r10, power4_idle_nap_return)
- std r10,_NIP(r1)
- blr
-
-power4_idle_nap_return:
- blr
-#endif
-
CLOSE_FIXED_SECTION(real_vectors);
CLOSE_FIXED_SECTION(real_trampolines);
CLOSE_FIXED_SECTION(virt_vectors);
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index 22f249b6f58d..27d2e6a72ec9 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -201,4 +201,8 @@ _GLOBAL(power4_idle_nap)
mtmsrd r7
isync
b 1b
+
+ .globl power4_idle_nap_return
+power4_idle_nap_return:
+ blr
#endif
--
2.23.0
^ permalink raw reply related
* [PATCH 18/18] powerpc/64s: move power4 idle entirely to C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Christophe asked about doing this, most of the code is still in
asm but maybe it's slightly nicer? I don't know if it's worthwhile.
---
arch/powerpc/kernel/idle.c | 25 ++++++++++++++++++++-----
arch/powerpc/kernel/idle_book3s.S | 22 ----------------------
2 files changed, 20 insertions(+), 27 deletions(-)
diff --git a/arch/powerpc/kernel/idle.c b/arch/powerpc/kernel/idle.c
index ae0e2632393d..849e77a45915 100644
--- a/arch/powerpc/kernel/idle.c
+++ b/arch/powerpc/kernel/idle.c
@@ -72,6 +72,9 @@ int powersave_nap;
#ifdef CONFIG_PPC_970_NAP
void power4_idle(void)
{
+ unsigned long msr_idle = MSR_KERNEL|MSR_EE|MSR_POW;
+ unsigned long tmp1, tmp2;
+
if (!cpu_has_feature(CPU_FTR_CAN_NAP))
return;
@@ -84,13 +87,25 @@ void power4_idle(void)
if (cpu_has_feature(CPU_FTR_ALTIVEC))
asm volatile("DSSALL ; sync" ::: "memory");
- power4_idle_nap();
-
+ asm volatile(
+" ld %0,PACA_THREAD_INFO(r13) \n"
+" ld %1,TI_LOCAL_FLAGS(%0) \n"
+" ori %1,%1,_TLF_NAPPING \n"
+" std %1,TI_LOCAL_FLAGS(%0) \n"
/*
- * power4_idle_nap returns with interrupts enabled (soft and hard).
- * to our caller with interrupts enabled (soft and hard). Our caller
- * can cope with either interrupts disabled or enabled upon return.
+ * NAPPING bit is set, from this point onward nap_adjust_return()
+ * will cause interrupts to return to power4_idle_nap_return.
*/
+"1: sync \n"
+" isync \n"
+" mtmsrd %2 \n"
+" isync \n"
+" b 1b \n"
+" .globl power4_idle_nap_return \n"
+"power4_idle_nap_return: \n"
+ : "=r"(tmp1), "=r"(tmp2)
+ : "r"(msr_idle)
+ );
}
#endif
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index 27d2e6a72ec9..d4047f3c672e 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -184,25 +184,3 @@ _GLOBAL(isa206_idle_insn_mayloss)
IDLE_STATE_ENTER_SEQ_NORET(PPC_SLEEP)
2: IDLE_STATE_ENTER_SEQ_NORET(PPC_WINKLE)
#endif
-
-#ifdef CONFIG_PPC_970_NAP
-_GLOBAL(power4_idle_nap)
- LOAD_REG_IMMEDIATE(r7, MSR_KERNEL|MSR_EE|MSR_POW)
- ld r9,PACA_THREAD_INFO(r13)
- ld r8,TI_LOCAL_FLAGS(r9)
- ori r8,r8,_TLF_NAPPING
- std r8,TI_LOCAL_FLAGS(r9)
- /*
- * NAPPING bit is set, from this point onward power4_fixup_nap
- * will cause exceptions to return to power4_idle_nap_return.
- */
-1: sync
- isync
- mtmsrd r7
- isync
- b 1b
-
- .globl power4_idle_nap_return
-power4_idle_nap_return:
- blr
-#endif
--
2.23.0
^ permalink raw reply related
* [PATCH 16/18] powerpc/64s: runlatch interrupt handling in C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
There is no need for this to be in asm, use the new intrrupt entry wrapper.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 7 +++++++
arch/powerpc/kernel/exceptions-64s.S | 18 ------------------
2 files changed, 7 insertions(+), 18 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 5ece57dd0455..46846fe332b9 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -6,6 +6,7 @@
#include <linux/hardirq.h>
#include <asm/cputime.h>
#include <asm/ftrace.h>
+#include <asm/runlatch.h>
struct interrupt_state {
#ifdef CONFIG_PPC_BOOK3E_64
@@ -60,6 +61,12 @@ static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt
static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (cpu_has_feature(CPU_FTR_CTRL) &&
+ !test_thread_local_flags(_TLF_RUNLATCH))
+ __ppc64_runlatch_on();
+#endif
+
interrupt_enter_prepare(regs, state);
}
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 0949dd47be59..227bad3a586d 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -692,14 +692,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
ld r1,GPR1(r1)
.endm
-#define RUNLATCH_ON \
-BEGIN_FTR_SECTION \
- ld r3, PACA_THREAD_INFO(r13); \
- ld r4,TI_LOCAL_FLAGS(r3); \
- andi. r0,r4,_TLF_RUNLATCH; \
- beql ppc64_runlatch_on_trampoline; \
-END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
-
/*
* When the idle code in power4_idle puts the CPU into NAP mode,
* it has to do so in a loop, and relies on the external interrupt
@@ -1581,7 +1573,6 @@ EXC_VIRT_END(hardware_interrupt, 0x4500, 0x100)
EXC_COMMON_BEGIN(hardware_interrupt_common)
GEN_COMMON hardware_interrupt
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -1767,7 +1758,6 @@ EXC_VIRT_END(decrementer, 0x4900, 0x80)
EXC_COMMON_BEGIN(decrementer_common)
GEN_COMMON decrementer
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
bl timer_interrupt
b interrupt_return
@@ -1853,7 +1843,6 @@ EXC_VIRT_END(doorbell_super, 0x4a00, 0x100)
EXC_COMMON_BEGIN(doorbell_super_common)
GEN_COMMON doorbell_super
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2208,7 +2197,6 @@ EXC_COMMON_BEGIN(hmi_exception_early_common)
EXC_COMMON_BEGIN(hmi_exception_common)
GEN_COMMON hmi_exception
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
bl handle_hmi_exception
b interrupt_return
@@ -2238,7 +2226,6 @@ EXC_VIRT_END(h_doorbell, 0x4e80, 0x20)
EXC_COMMON_BEGIN(h_doorbell_common)
GEN_COMMON h_doorbell
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
#ifdef CONFIG_PPC_DOORBELL
bl doorbell_exception
@@ -2272,7 +2259,6 @@ EXC_VIRT_END(h_virt_irq, 0x4ea0, 0x20)
EXC_COMMON_BEGIN(h_virt_irq_common)
GEN_COMMON h_virt_irq
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_IRQ
b interrupt_return
@@ -2319,7 +2305,6 @@ EXC_VIRT_END(performance_monitor, 0x4f00, 0x20)
EXC_COMMON_BEGIN(performance_monitor_common)
GEN_COMMON performance_monitor
FINISH_NAP
- RUNLATCH_ON
addi r3,r1,STACK_FRAME_OVERHEAD
bl performance_monitor_exception
b interrupt_return
@@ -3030,9 +3015,6 @@ kvmppc_skip_Hinterrupt:
* come here.
*/
-EXC_COMMON_BEGIN(ppc64_runlatch_on_trampoline)
- b __ppc64_runlatch_on
-
USE_FIXED_SECTION(virt_trampolines)
/*
* All code below __end_interrupts is treated as soft-masked. If
--
2.23.0
^ permalink raw reply related
* [PATCH 15/18] powerpc/64s: move NMI soft-mask handling to C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Saving and restoring soft-mask state can now be done in C using the
interrupt handler wrapper functions.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 25 ++++++++++++
arch/powerpc/kernel/exceptions-64s.S | 60 ----------------------------
2 files changed, 25 insertions(+), 60 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index a87284707f09..5ece57dd0455 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -70,6 +70,10 @@ static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct int
struct interrupt_nmi_state {
#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_BOOK3S_64
+ u8 irq_soft_mask;
+ u8 irq_happened;
+#endif
u8 ftrace_enabled;
#endif
};
@@ -77,6 +81,20 @@ struct interrupt_nmi_state {
static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_BOOK3S_64
+ state->irq_soft_mask = local_paca->irq_soft_mask;
+ state->irq_happened = local_paca->irq_happened;
+ state->ftrace_enabled = this_cpu_get_ftrace_enabled();
+
+ /*
+ * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
+ * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
+ * because that goes through irq tracing which we don't want in NMI.
+ */
+ local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
+ local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
+#endif
+
state->ftrace_enabled = this_cpu_get_ftrace_enabled();
this_cpu_set_ftrace_enabled(0);
#endif
@@ -100,6 +118,13 @@ static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct inter
#ifdef CONFIG_PPC64
this_cpu_set_ftrace_enabled(state->ftrace_enabled);
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ /* Check we didn't change the pending interrupt mask. */
+ WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
+ local_paca->irq_happened = state->irq_happened;
+ local_paca->irq_soft_mask = state->irq_soft_mask;
+#endif
#endif
}
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 121a55c87c02..0949dd47be59 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1010,20 +1010,6 @@ EXC_COMMON_BEGIN(system_reset_common)
ld r1,PACA_NMI_EMERG_SP(r13)
subi r1,r1,INT_FRAME_SIZE
__GEN_COMMON_BODY system_reset
- /*
- * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
- * the right thing. We do not want to reconcile because that goes
- * through irq tracing which we don't want in NMI.
- *
- * Save PACAIRQHAPPENED to RESULT (otherwise unused), and set HARD_DIS
- * as we are running with MSR[EE]=0.
- */
- li r10,IRQS_ALL_DISABLED
- stb r10,PACAIRQSOFTMASK(r13)
- lbz r10,PACAIRQHAPPENED(r13)
- std r10,RESULT(r1)
- ori r10,r10,PACA_IRQ_HARD_DIS
- stb r10,PACAIRQHAPPENED(r13)
addi r3,r1,STACK_FRAME_OVERHEAD
bl system_reset_exception
@@ -1039,14 +1025,6 @@ EXC_COMMON_BEGIN(system_reset_common)
subi r10,r10,1
sth r10,PACA_IN_NMI(r13)
- /*
- * Restore soft mask settings.
- */
- ld r10,RESULT(r1)
- stb r10,PACAIRQHAPPENED(r13)
- ld r10,SOFTE(r1)
- stb r10,PACAIRQSOFTMASK(r13)
-
kuap_restore_amr r9, r10
EXCEPTION_RESTORE_REGS
RFI_TO_USER_OR_KERNEL
@@ -1192,30 +1170,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
li r10,MSR_RI
mtmsrd r10,1
- /*
- * Set IRQS_ALL_DISABLED and save PACAIRQHAPPENED (see
- * system_reset_common)
- */
- li r10,IRQS_ALL_DISABLED
- stb r10,PACAIRQSOFTMASK(r13)
- lbz r10,PACAIRQHAPPENED(r13)
- std r10,RESULT(r1)
- ori r10,r10,PACA_IRQ_HARD_DIS
- stb r10,PACAIRQHAPPENED(r13)
-
addi r3,r1,STACK_FRAME_OVERHEAD
bl machine_check_early
std r3,RESULT(r1) /* Save result */
ld r12,_MSR(r1)
- /*
- * Restore soft mask settings.
- */
- ld r10,RESULT(r1)
- stb r10,PACAIRQHAPPENED(r13)
- ld r10,SOFTE(r1)
- stb r10,PACAIRQSOFTMASK(r13)
-
#ifdef CONFIG_PPC_P7_NAP
/*
* Check if thread was in power saving mode. We come here when any
@@ -2814,17 +2773,6 @@ EXC_COMMON_BEGIN(soft_nmi_common)
subi r1,r1,INT_FRAME_SIZE
__GEN_COMMON_BODY soft_nmi
- /*
- * Set IRQS_ALL_DISABLED and save PACAIRQHAPPENED (see
- * system_reset_common)
- */
- li r10,IRQS_ALL_DISABLED
- stb r10,PACAIRQSOFTMASK(r13)
- lbz r10,PACAIRQHAPPENED(r13)
- std r10,RESULT(r1)
- ori r10,r10,PACA_IRQ_HARD_DIS
- stb r10,PACAIRQHAPPENED(r13)
-
addi r3,r1,STACK_FRAME_OVERHEAD
bl soft_nmi_interrupt
@@ -2832,14 +2780,6 @@ EXC_COMMON_BEGIN(soft_nmi_common)
li r9,0
mtmsrd r9,1
- /*
- * Restore soft mask settings.
- */
- ld r10,RESULT(r1)
- stb r10,PACAIRQHAPPENED(r13)
- ld r10,SOFTE(r1)
- stb r10,PACAIRQSOFTMASK(r13)
-
kuap_restore_amr r9, r10
EXCEPTION_RESTORE_REGS hsrr=0
RFI_TO_KERNEL
--
2.23.0
^ permalink raw reply related
* [PATCH 14/18] powerpc: move NMI entry/exit code into wrapper
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
This moves the common NMI entry and exit code into the interrupt handler
wrappers.
This changes the behaviour of soft-NMI (watchdog) and HMI interrupts, and
also MCE interrupts on 64e, by adding missing parts of the NMI entry to
them. It fixes a bug with sreset on pseries HPT guests which shouldn't
call nmi_enter().
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 24 ++++++++++++++++++
arch/powerpc/kernel/mce.c | 11 --------
arch/powerpc/kernel/traps.c | 38 +++++-----------------------
arch/powerpc/kernel/watchdog.c | 10 +++-----
4 files changed, 35 insertions(+), 48 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 9bd14c59dc8e..a87284707f09 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -69,14 +69,38 @@ static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct int
}
struct interrupt_nmi_state {
+#ifdef CONFIG_PPC64
+ u8 ftrace_enabled;
+#endif
};
static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
+#ifdef CONFIG_PPC64
+ state->ftrace_enabled = this_cpu_get_ftrace_enabled();
+ this_cpu_set_ftrace_enabled(0);
+#endif
+
+ /*
+ * Do not use nmi_enter() for pseries hash guest taking a real-mode
+ * NMI because not everything it touches is within the RMA limit.
+ */
+ if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
+ !firmware_has_feature(FW_FEATURE_LPAR) ||
+ radix_enabled() || (mfmsr() & MSR_DR))
+ nmi_enter();
}
static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
{
+ if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) ||
+ !firmware_has_feature(FW_FEATURE_LPAR) ||
+ radix_enabled() || (mfmsr() & MSR_DR))
+ nmi_exit();
+
+#ifdef CONFIG_PPC64
+ this_cpu_set_ftrace_enabled(state->ftrace_enabled);
+#endif
}
/**
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index b84459f45b1a..9f39deed4fca 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -592,12 +592,6 @@ EXPORT_SYMBOL_GPL(machine_check_print_event_info);
DEFINE_INTERRUPT_HANDLER_NMI(machine_check_early)
{
long handled = 0;
- u8 ftrace_enabled = this_cpu_get_ftrace_enabled();
-
- this_cpu_set_ftrace_enabled(0);
- /* Do not use nmi_enter/exit for pseries hpte guest */
- if (radix_enabled() || !firmware_has_feature(FW_FEATURE_LPAR))
- nmi_enter();
hv_nmi_check_nonrecoverable(regs);
@@ -607,11 +601,6 @@ DEFINE_INTERRUPT_HANDLER_NMI(machine_check_early)
if (ppc_md.machine_check_early)
handled = ppc_md.machine_check_early(regs);
- if (radix_enabled() || !firmware_has_feature(FW_FEATURE_LPAR))
- nmi_exit();
-
- this_cpu_set_ftrace_enabled(ftrace_enabled);
-
return handled;
}
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 09780481e1b1..95f84c542523 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -443,11 +443,6 @@ DEFINE_INTERRUPT_HANDLER_NMI(system_reset_exception)
{
unsigned long hsrr0, hsrr1;
bool saved_hsrrs = false;
- u8 ftrace_enabled = this_cpu_get_ftrace_enabled();
-
- this_cpu_set_ftrace_enabled(0);
-
- nmi_enter();
/*
* System reset can interrupt code where HSRRs are live and MSR[RI]=1.
@@ -519,10 +514,6 @@ DEFINE_INTERRUPT_HANDLER_NMI(system_reset_exception)
mtspr(SPRN_HSRR1, hsrr1);
}
- nmi_exit();
-
- this_cpu_set_ftrace_enabled(ftrace_enabled);
-
/* What should we do here? We could issue a shutdown or hard reset. */
return 0;
@@ -824,6 +815,12 @@ int machine_check_generic(struct pt_regs *regs)
#endif /* everything else */
+/*
+ * BOOK3S_64 does not call this handler as a non-maskable interrupt
+ * (it uses its own early real-mode handler to handle the MCE proper
+ * and then raises irq_work to call this handler when interrupts are
+ * enabled).
+ */
#ifdef CONFIG_PPC_BOOK3S_64
DEFINE_INTERRUPT_HANDLER_ASYNC(machine_check_exception)
#else
@@ -832,20 +829,6 @@ DEFINE_INTERRUPT_HANDLER_NMI(machine_check_exception)
{
int recover = 0;
- /*
- * BOOK3S_64 does not call this handler as a non-maskable interrupt
- * (it uses its own early real-mode handler to handle the MCE proper
- * and then raises irq_work to call this handler when interrupts are
- * enabled).
- *
- * This is silly. The BOOK3S_64 should just call a different function
- * rather than expecting semantics to magically change. Something
- * like 'non_nmi_machine_check_exception()', perhaps?
- */
- const bool nmi = !IS_ENABLED(CONFIG_PPC_BOOK3S_64);
-
- if (nmi) nmi_enter();
-
__this_cpu_inc(irq_stat.mce_exceptions);
add_taint(TAINT_MACHINE_CHECK, LOCKDEP_NOW_UNRELIABLE);
@@ -870,24 +853,17 @@ DEFINE_INTERRUPT_HANDLER_NMI(machine_check_exception)
if (check_io_access(regs))
goto bail;
- if (nmi) nmi_exit();
-
die("Machine check", regs, SIGBUS);
/* Must die if the interrupt is not recoverable */
if (!(regs->msr & MSR_RI))
die("Unrecoverable Machine check", regs, SIGBUS);
-#ifdef CONFIG_PPC_BOOK3S_64
bail:
+#ifdef CONFIG_PPC_BOOK3S_64
return;
#else
return 0;
-
-bail:
- if (nmi) nmi_exit();
-
- return 0;
#endif
}
diff --git a/arch/powerpc/kernel/watchdog.c b/arch/powerpc/kernel/watchdog.c
index 824b9376ac35..dc39534836a3 100644
--- a/arch/powerpc/kernel/watchdog.c
+++ b/arch/powerpc/kernel/watchdog.c
@@ -254,11 +254,12 @@ DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_interrupt)
int cpu = raw_smp_processor_id();
u64 tb;
+ /* should only arrive from kernel, with irqs disabled */
+ WARN_ON_ONCE(!arch_irq_disabled_regs(regs));
+
if (!cpumask_test_cpu(cpu, &wd_cpus_enabled))
return 0;
- nmi_enter();
-
__this_cpu_inc(irq_stat.soft_nmi_irqs);
tb = get_tb();
@@ -266,7 +267,7 @@ DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_interrupt)
wd_smp_lock(&flags);
if (cpumask_test_cpu(cpu, &wd_smp_cpus_stuck)) {
wd_smp_unlock(&flags);
- goto out;
+ return 0;
}
set_cpu_stuck(cpu, tb);
@@ -290,9 +291,6 @@ DEFINE_INTERRUPT_HANDLER_NMI(soft_nmi_interrupt)
if (wd_panic_timeout_tb < 0x7fffffff)
mtspr(SPRN_DEC, wd_panic_timeout_tb);
-out:
- nmi_exit();
-
return 0;
}
--
2.23.0
^ permalink raw reply related
* [PATCH 13/18] powerpc/64: entry cpu time accounting in C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
There is no need for this to be in asm, use the new intrrupt entry wrapper.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 4 ++++
arch/powerpc/include/asm/ppc_asm.h | 24 ------------------------
arch/powerpc/kernel/exceptions-64e.S | 1 -
arch/powerpc/kernel/exceptions-64s.S | 5 -----
4 files changed, 4 insertions(+), 30 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index bb09bcb290af..9bd14c59dc8e 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -4,6 +4,7 @@
#include <linux/context_tracking.h>
#include <linux/hardirq.h>
+#include <asm/cputime.h>
#include <asm/ftrace.h>
struct interrupt_state {
@@ -25,6 +26,9 @@ static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrup
if (user_mode(regs)) {
CT_WARN_ON(ct_state() != CONTEXT_USER);
user_exit_irqoff();
+
+ account_cpu_user_entry();
+ account_stolen_time();
} else {
/*
* CT_WARN_ON comes here via program_check_exception,
diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index 511786f0e40d..c1199f6c75a3 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -25,7 +25,6 @@
#ifndef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
#define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb)
#define ACCOUNT_CPU_USER_EXIT(ptr, ra, rb)
-#define ACCOUNT_STOLEN_TIME
#else
#define ACCOUNT_CPU_USER_ENTRY(ptr, ra, rb) \
MFTB(ra); /* get timebase */ \
@@ -44,29 +43,6 @@
PPC_LL ra, ACCOUNT_SYSTEM_TIME(ptr); \
add ra,ra,rb; /* add on to system time */ \
PPC_STL ra, ACCOUNT_SYSTEM_TIME(ptr)
-
-#ifdef CONFIG_PPC_SPLPAR
-#define ACCOUNT_STOLEN_TIME \
-BEGIN_FW_FTR_SECTION; \
- beq 33f; \
- /* from user - see if there are any DTL entries to process */ \
- ld r10,PACALPPACAPTR(r13); /* get ptr to VPA */ \
- ld r11,PACA_DTL_RIDX(r13); /* get log read index */ \
- addi r10,r10,LPPACA_DTLIDX; \
- LDX_BE r10,0,r10; /* get log write index */ \
- cmpd cr1,r11,r10; \
- beq+ cr1,33f; \
- bl accumulate_stolen_time; \
- ld r12,_MSR(r1); \
- andi. r10,r12,MSR_PR; /* Restore cr0 (coming from user) */ \
-33: \
-END_FW_FTR_SECTION_IFSET(FW_FEATURE_SPLPAR)
-
-#else /* CONFIG_PPC_SPLPAR */
-#define ACCOUNT_STOLEN_TIME
-
-#endif /* CONFIG_PPC_SPLPAR */
-
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
/*
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index dc728bb1c89a..e6b5a362fc91 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -398,7 +398,6 @@ exc_##n##_common: \
std r10,_NIP(r1); /* save SRR0 to stackframe */ \
std r11,_MSR(r1); /* save SRR1 to stackframe */ \
beq 2f; /* if from kernel mode */ \
- ACCOUNT_CPU_USER_ENTRY(r13,r10,r11);/* accounting (uses cr0+eq) */ \
2: ld r3,excf+EX_R10(r13); /* get back r10 */ \
ld r4,excf+EX_R11(r13); /* get back r11 */ \
mfspr r5,scratch; /* get back r13 */ \
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index b36247ad1f64..121a55c87c02 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -577,7 +577,6 @@ DEFINE_FIXED_SYMBOL(\name\()_common_real)
kuap_save_amr_and_lock r9, r10, cr1, cr0
.endif
beq 101f /* if from kernel mode */
- ACCOUNT_CPU_USER_ENTRY(r13, r9, r10)
BEGIN_FTR_SECTION
ld r9,IAREA+EX_PPR(r13) /* Read PPR from paca */
std r9,_PPR(r1)
@@ -645,10 +644,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
ld r11,exception_marker@toc(r2)
std r10,RESULT(r1) /* clear regs->result */
std r11,STACK_FRAME_OVERHEAD-16(r1) /* mark the frame */
-
- .if ISTACK
- ACCOUNT_STOLEN_TIME
- .endif
.endm
/*
--
2.23.0
^ permalink raw reply related
* [PATCH 12/18] powerpc/64: move account_stolen_time into its own function
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
This will be used by interrupt entry as well.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/cputime.h | 15 +++++++++++++++
arch/powerpc/kernel/syscall_64.c | 10 +---------
2 files changed, 16 insertions(+), 9 deletions(-)
diff --git a/arch/powerpc/include/asm/cputime.h b/arch/powerpc/include/asm/cputime.h
index ed75d1c318e3..3f61604e1fcf 100644
--- a/arch/powerpc/include/asm/cputime.h
+++ b/arch/powerpc/include/asm/cputime.h
@@ -87,6 +87,18 @@ static notrace inline void account_cpu_user_exit(void)
acct->starttime_user = tb;
}
+static notrace inline void account_stolen_time(void)
+{
+#ifdef CONFIG_PPC_SPLPAR
+ if (IS_ENABLED(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) &&
+ firmware_has_feature(FW_FEATURE_SPLPAR)) {
+ struct lppaca *lp = local_paca->lppaca_ptr;
+
+ if (unlikely(local_paca->dtl_ridx != be64_to_cpu(lp->dtl_idx)))
+ accumulate_stolen_time();
+ }
+#endif
+}
#endif /* __KERNEL__ */
#else /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
@@ -96,5 +108,8 @@ static inline void account_cpu_user_entry(void)
static inline void account_cpu_user_exit(void)
{
}
+static notrace inline void account_stolen_time(void)
+{
+}
#endif /* CONFIG_VIRT_CPU_ACCOUNTING_NATIVE */
#endif /* __POWERPC_CPUTIME_H */
diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c
index 5820a18672bc..672f2a796487 100644
--- a/arch/powerpc/kernel/syscall_64.c
+++ b/arch/powerpc/kernel/syscall_64.c
@@ -45,15 +45,7 @@ notrace long system_call_exception(long r3, long r4, long r5,
account_cpu_user_entry();
-#ifdef CONFIG_PPC_SPLPAR
- if (IS_ENABLED(CONFIG_VIRT_CPU_ACCOUNTING_NATIVE) &&
- firmware_has_feature(FW_FEATURE_SPLPAR)) {
- struct lppaca *lp = local_paca->lppaca_ptr;
-
- if (unlikely(local_paca->dtl_ridx != be64_to_cpu(lp->dtl_idx)))
- accumulate_stolen_time();
- }
-#endif
+ account_stolen_time();
/*
* This is not required for the syscall exit path, but makes the
--
2.23.0
^ permalink raw reply related
* [PATCH 11/18] powerpc/64s: reconcile interrupts in C
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
There is no need for this to be in asm, use the new intrrupt entry wrapper.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 15 +++++++++++----
arch/powerpc/kernel/exceptions-64s.S | 26 --------------------------
2 files changed, 11 insertions(+), 30 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 0b29d363988d..bb09bcb290af 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -14,11 +14,14 @@ struct interrupt_state {
static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
-#ifdef CONFIG_PPC_BOOK3E_64
- state->ctx_state = exception_enter();
-#endif
-
+ /*
+ * Book3E reconciles irq soft mask in asm
+ */
#ifdef CONFIG_PPC_BOOK3S_64
+ if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
+ trace_hardirqs_off();
+ local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
+
if (user_mode(regs)) {
CT_WARN_ON(ct_state() != CONTEXT_USER);
user_exit_irqoff();
@@ -31,6 +34,10 @@ static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrup
CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
}
#endif
+
+#ifdef CONFIG_PPC_BOOK3E_64
+ state->ctx_state = exception_enter();
+#endif
}
static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index f6989321136d..b36247ad1f64 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -139,7 +139,6 @@ name:
#define IKVM_VIRT .L_IKVM_VIRT_\name\() /* Virt entry tests KVM */
#define ISTACK .L_ISTACK_\name\() /* Set regular kernel stack */
#define __ISTACK(name) .L_ISTACK_ ## name
-#define IRECONCILE .L_IRECONCILE_\name\() /* Do RECONCILE_IRQ_STATE */
#define IKUAP .L_IKUAP_\name\() /* Do KUAP lock */
#define INT_DEFINE_BEGIN(n) \
@@ -203,9 +202,6 @@ do_define_int n
.ifndef ISTACK
ISTACK=1
.endif
- .ifndef IRECONCILE
- IRECONCILE=1
- .endif
.ifndef IKUAP
IKUAP=1
.endif
@@ -653,10 +649,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR)
.if ISTACK
ACCOUNT_STOLEN_TIME
.endif
-
- .if IRECONCILE
- RECONCILE_IRQ_STATE(r10, r11)
- .endif
.endm
/*
@@ -935,7 +927,6 @@ INT_DEFINE_BEGIN(system_reset)
*/
ISET_RI=0
ISTACK=0
- IRECONCILE=0
IKVM_REAL=1
INT_DEFINE_END(system_reset)
@@ -1125,7 +1116,6 @@ INT_DEFINE_BEGIN(machine_check_early)
ISTACK=0
IDAR=1
IDSISR=1
- IRECONCILE=0
IKUAP=0 /* We don't touch AMR here, we never go to virtual mode */
INT_DEFINE_END(machine_check_early)
@@ -1473,7 +1463,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
INT_DEFINE_BEGIN(data_access_slb)
IVEC=0x380
IAREA=PACA_EXSLB
- IRECONCILE=0
IDAR=1
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
IKVM_SKIP=1
@@ -1502,7 +1491,6 @@ MMU_FTR_SECTION_ELSE
li r3,-EFAULT
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
std r3,RESULT(r1)
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_bad_slb_fault
b interrupt_return
@@ -1564,7 +1552,6 @@ ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
INT_DEFINE_BEGIN(instruction_access_slb)
IVEC=0x480
IAREA=PACA_EXSLB
- IRECONCILE=0
IISIDE=1
IDAR=1
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
@@ -1593,7 +1580,6 @@ MMU_FTR_SECTION_ELSE
li r3,-EFAULT
ALT_MMU_FTR_SECTION_END_IFCLR(MMU_FTR_TYPE_RADIX)
std r3,RESULT(r1)
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_bad_slb_fault
b interrupt_return
@@ -1753,7 +1739,6 @@ EXC_COMMON_BEGIN(program_check_common)
*/
INT_DEFINE_BEGIN(fp_unavailable)
IVEC=0x800
- IRECONCILE=0
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
IKVM_REAL=1
#endif
@@ -1768,7 +1753,6 @@ EXC_VIRT_END(fp_unavailable, 0x4800, 0x100)
EXC_COMMON_BEGIN(fp_unavailable_common)
GEN_COMMON fp_unavailable
bne 1f /* if from user, just load it up */
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl kernel_fp_unavailable_exception
0: trap
@@ -1787,7 +1771,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_TM)
b fast_interrupt_return
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2: /* User process was in a transaction */
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl fp_unavailable_tm
b interrupt_return
@@ -1852,7 +1835,6 @@ INT_DEFINE_BEGIN(hdecrementer)
IVEC=0x980
IHSRR=1
ISTACK=0
- IRECONCILE=0
IKVM_REAL=1
IKVM_VIRT=1
INT_DEFINE_END(hdecrementer)
@@ -2226,7 +2208,6 @@ INT_DEFINE_BEGIN(hmi_exception_early)
IHSRR=1
IREALMODE_COMMON=1
ISTACK=0
- IRECONCILE=0
IKUAP=0 /* We don't touch AMR here, we never go to virtual mode */
IKVM_REAL=1
INT_DEFINE_END(hmi_exception_early)
@@ -2400,7 +2381,6 @@ EXC_COMMON_BEGIN(performance_monitor_common)
*/
INT_DEFINE_BEGIN(altivec_unavailable)
IVEC=0xf20
- IRECONCILE=0
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
IKVM_REAL=1
#endif
@@ -2430,7 +2410,6 @@ BEGIN_FTR_SECTION
b fast_interrupt_return
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2: /* User process was in a transaction */
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl altivec_unavailable_tm
b interrupt_return
@@ -2438,7 +2417,6 @@ BEGIN_FTR_SECTION
1:
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
#endif
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl altivec_unavailable_exception
b interrupt_return
@@ -2454,7 +2432,6 @@ END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
*/
INT_DEFINE_BEGIN(vsx_unavailable)
IVEC=0xf40
- IRECONCILE=0
#ifdef CONFIG_KVM_BOOK3S_PR_POSSIBLE
IKVM_REAL=1
#endif
@@ -2483,7 +2460,6 @@ BEGIN_FTR_SECTION
b load_up_vsx
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
2: /* User process was in a transaction */
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl vsx_unavailable_tm
b interrupt_return
@@ -2491,7 +2467,6 @@ BEGIN_FTR_SECTION
1:
END_FTR_SECTION_IFSET(CPU_FTR_VSX)
#endif
- RECONCILE_IRQ_STATE(r10, r11)
addi r3,r1,STACK_FRAME_OVERHEAD
bl vsx_unavailable_exception
b interrupt_return
@@ -2826,7 +2801,6 @@ EXC_VIRT_NONE(0x5800, 0x100)
INT_DEFINE_BEGIN(soft_nmi)
IVEC=0x900
ISTACK=0
- IRECONCILE=0 /* Soft-NMI may fire under local_irq_disable */
INT_DEFINE_END(soft_nmi)
/*
--
2.23.0
^ permalink raw reply related
* [PATCH 10/18] powerpc/64s: move context tracking exit to interrupt exit path
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
The interrupt handler wrapper functions are not the ideal place to
maintain context tracking because after they return, the low level exit
code must then determine if there are interrupts to replay, or if the
task should be preempted, etc. Those paths (e.g., schedule_user) include
their own exception_enter/exit pairs to fix this up but it's a bit hacky
(see schedule_user() comments).
Ideally context tracking will go to user mode only when there are no
more interrupts or context switches or other exit processing work to
handle.
64e can not do this because it does not use the C interrupt exit code.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 27 ++++++++++++++++++++++++---
arch/powerpc/kernel/syscall_64.c | 9 +++++++++
2 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 55f544dbf434..0b29d363988d 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -7,23 +7,44 @@
#include <asm/ftrace.h>
struct interrupt_state {
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_BOOK3E_64
enum ctx_state ctx_state;
#endif
};
static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_BOOK3E_64
state->ctx_state = exception_enter();
#endif
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (user_mode(regs)) {
+ CT_WARN_ON(ct_state() != CONTEXT_USER);
+ user_exit_irqoff();
+ } else {
+ /*
+ * CT_WARN_ON comes here via program_check_exception,
+ * so avoid recursion.
+ */
+ if (TRAP(regs) != 0x700)
+ CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
+ }
+#endif
}
static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC_BOOK3E_64
exception_exit(state->ctx_state);
#endif
+
+ /*
+ * Book3S exits to user via interrupt_exit_user_prepare(), which does
+ * context tracking, which is a cleaner way to handle PREEMPT=y
+ * and avoid context entry/exit in e.g., preempt_schedule_irq()),
+ * which is likely to be where the core code wants to end up.
+ */
}
static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c
index d9df6d14533e..5820a18672bc 100644
--- a/arch/powerpc/kernel/syscall_64.c
+++ b/arch/powerpc/kernel/syscall_64.c
@@ -275,6 +275,7 @@ notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs, unsigned
BUG_ON(!(regs->msr & MSR_PR));
BUG_ON(!FULL_REGS(regs));
BUG_ON(regs->softe != IRQS_ENABLED);
+ CT_WARN_ON(ct_state() == CONTEXT_USER);
/*
* We don't need to restore AMR on the way back to userspace for KUAP.
@@ -317,7 +318,9 @@ notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs, unsigned
}
}
+ user_enter_irqoff();
if (unlikely(!prep_irq_for_enabled_exit(true))) {
+ user_exit_irqoff();
local_irq_enable();
local_irq_disable();
goto again;
@@ -358,6 +361,12 @@ notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs, unsign
unrecoverable_exception(regs);
BUG_ON(regs->msr & MSR_PR);
BUG_ON(!FULL_REGS(regs));
+ /*
+ * CT_WARN_ON comes here via program_check_exception,
+ * so avoid recursion.
+ */
+ if (TRAP(regs) != 0x700)
+ CT_WARN_ON(ct_state() == CONTEXT_USER);
amr = kuap_get_and_check_amr();
--
2.23.0
^ permalink raw reply related
* [PATCH 09/18] powerpc/64: add context tracking to asynchronous interrupts
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Previously context tracking was not done for asynchronous interrupts,
(those that run in interrupt context), and if those would cause a
reschedule when they exit, then scheduling functions (schedule_user,
preempt_schedule_irq) call exception_enter/exit to fix this up and
exit user context.
This is a hack we would like to get away from, so do context tracking
for asynchronous interrupts too.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 62a362915adc..55f544dbf434 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -28,10 +28,12 @@ static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt
static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
+ interrupt_enter_prepare(regs, state);
}
static inline void interrupt_async_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
+ interrupt_exit_prepare(regs, state);
}
struct interrupt_nmi_state {
--
2.23.0
^ permalink raw reply related
* [PATCH 08/18] powerpc/64: context tracking move to interrupt wrappers
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
This moves exception_enter/exit calls to wrapper functions for
synchronous interrupts. More interrupt handlers are covered by
this than previously.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 9 ++++
arch/powerpc/kernel/traps.c | 74 ++++++---------------------
arch/powerpc/mm/book3s64/hash_utils.c | 2 -
arch/powerpc/mm/fault.c | 3 --
4 files changed, 26 insertions(+), 62 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index 446e24b0eee1..62a362915adc 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -7,14 +7,23 @@
#include <asm/ftrace.h>
struct interrupt_state {
+#ifdef CONFIG_PPC64
+ enum ctx_state ctx_state;
+#endif
};
static inline void interrupt_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
+#ifdef CONFIG_PPC64
+ state->ctx_state = exception_enter();
+#endif
}
static inline void interrupt_exit_prepare(struct pt_regs *regs, struct interrupt_state *state)
{
+#ifdef CONFIG_PPC64
+ exception_exit(state->ctx_state);
+#endif
}
static inline void interrupt_async_enter_prepare(struct pt_regs *regs, struct interrupt_state *state)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 2d19df1f6c05..09780481e1b1 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1108,41 +1108,28 @@ DEFINE_INTERRUPT_HANDLER_ASYNC(handle_hmi_exception)
DEFINE_INTERRUPT_HANDLER(unknown_exception)
{
- enum ctx_state prev_state = exception_enter();
-
printk("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
regs->nip, regs->msr, regs->trap);
_exception(SIGTRAP, regs, TRAP_UNK, 0);
-
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception)
{
- enum ctx_state prev_state = exception_enter();
-
printk("Bad trap at PC: %lx, SR: %lx, vector=%lx\n",
regs->nip, regs->msr, regs->trap);
_exception(SIGTRAP, regs, TRAP_UNK, 0);
-
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(instruction_breakpoint_exception)
{
- enum ctx_state prev_state = exception_enter();
-
if (notify_die(DIE_IABR_MATCH, "iabr_match", regs, 5,
5, SIGTRAP) == NOTIFY_STOP)
- goto bail;
+ return;
if (debugger_iabr_match(regs))
- goto bail;
+ return;
_exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
-
-bail:
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(RunModeException)
@@ -1152,8 +1139,6 @@ DEFINE_INTERRUPT_HANDLER(RunModeException)
DEFINE_INTERRUPT_HANDLER(single_step_exception)
{
- enum ctx_state prev_state = exception_enter();
-
clear_single_step(regs);
clear_br_trace(regs);
@@ -1162,14 +1147,11 @@ DEFINE_INTERRUPT_HANDLER(single_step_exception)
if (notify_die(DIE_SSTEP, "single_step", regs, 5,
5, SIGTRAP) == NOTIFY_STOP)
- goto bail;
+ return;
if (debugger_sstep(regs))
- goto bail;
+ return;
_exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
-
-bail:
- exception_exit(prev_state);
}
NOKPROBE_SYMBOL(single_step_exception);
@@ -1495,7 +1477,6 @@ static inline int emulate_math(struct pt_regs *regs) { return -1; }
DEFINE_INTERRUPT_HANDLER(program_check_exception)
{
- enum ctx_state prev_state = exception_enter();
unsigned int reason = get_reason(regs);
/* We can now get here via a FP Unavailable exception if the core
@@ -1504,22 +1485,22 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
if (reason & REASON_FP) {
/* IEEE FP exception */
parse_fpe(regs);
- goto bail;
+ return;
}
if (reason & REASON_TRAP) {
unsigned long bugaddr;
/* Debugger is first in line to stop recursive faults in
* rcu_lock, notify_die, or atomic_notifier_call_chain */
if (debugger_bpt(regs))
- goto bail;
+ return;
if (kprobe_handler(regs))
- goto bail;
+ return;
/* trap exception */
if (notify_die(DIE_BPT, "breakpoint", regs, 5, 5, SIGTRAP)
== NOTIFY_STOP)
- goto bail;
+ return;
bugaddr = regs->nip;
/*
@@ -1531,10 +1512,10 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
if (!(regs->msr & MSR_PR) && /* not user-mode */
report_bug(bugaddr, regs) == BUG_TRAP_TYPE_WARN) {
regs->nip += 4;
- goto bail;
+ return;
}
_exception(SIGTRAP, regs, TRAP_BRKPT, regs->nip);
- goto bail;
+ return;
}
#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
if (reason & REASON_TM) {
@@ -1555,7 +1536,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
*/
if (user_mode(regs)) {
_exception(SIGILL, regs, ILL_ILLOPN, regs->nip);
- goto bail;
+ return;
} else {
printk(KERN_EMERG "Unexpected TM Bad Thing exception "
"at %lx (msr 0x%lx) tm_scratch=%llx\n",
@@ -1586,7 +1567,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
* pattern to occurrences etc. -dgibson 31/Mar/2003
*/
if (!emulate_math(regs))
- goto bail;
+ return;
/* Try to emulate it if we should. */
if (reason & (REASON_ILLEGAL | REASON_PRIVILEGED)) {
@@ -1594,10 +1575,10 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
case 0:
regs->nip += 4;
emulate_single_step(regs);
- goto bail;
+ return;
case -EFAULT:
_exception(SIGSEGV, regs, SEGV_MAPERR, regs->nip);
- goto bail;
+ return;
}
}
@@ -1606,9 +1587,6 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
_exception(SIGILL, regs, ILL_PRVOPC, regs->nip);
else
_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
-
-bail:
- exception_exit(prev_state);
}
NOKPROBE_SYMBOL(program_check_exception);
@@ -1625,14 +1603,12 @@ NOKPROBE_SYMBOL(emulation_assist_interrupt);
DEFINE_INTERRUPT_HANDLER(alignment_exception)
{
- enum ctx_state prev_state = exception_enter();
int sig, code, fixed = 0;
unsigned long reason;
interrupt_cond_local_irq_enable(regs);
reason = get_reason(regs);
-
if (reason & REASON_BOUNDARY) {
sig = SIGBUS;
code = BUS_ADRALN;
@@ -1640,7 +1616,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
}
if (tm_abort_check(regs, TM_CAUSE_ALIGNMENT | TM_CAUSE_PERSISTENT))
- goto bail;
+ return;
/* we don't implement logging of alignment exceptions */
if (!(current->thread.align_ctl & PR_UNALIGN_SIGBUS))
@@ -1650,7 +1626,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
/* skip over emulated instruction */
regs->nip += inst_length(reason);
emulate_single_step(regs);
- goto bail;
+ return;
}
/* Operand address was bad */
@@ -1666,9 +1642,6 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
_exception(sig, regs, code, regs->dar);
else
bad_page_fault(regs, sig);
-
-bail:
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(StackOverflow)
@@ -1682,41 +1655,28 @@ DEFINE_INTERRUPT_HANDLER(StackOverflow)
DEFINE_INTERRUPT_HANDLER(stack_overflow_exception)
{
- enum ctx_state prev_state = exception_enter();
-
die("Kernel stack overflow", regs, SIGSEGV);
-
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception)
{
- enum ctx_state prev_state = exception_enter();
-
printk(KERN_EMERG "Unrecoverable FP Unavailable Exception "
"%lx at %lx\n", regs->trap, regs->nip);
die("Unrecoverable FP Unavailable Exception", regs, SIGABRT);
-
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(altivec_unavailable_exception)
{
- enum ctx_state prev_state = exception_enter();
-
if (user_mode(regs)) {
/* A user program has executed an altivec instruction,
but this kernel doesn't support altivec. */
_exception(SIGILL, regs, ILL_ILLOPC, regs->nip);
- goto bail;
+ return;
}
printk(KERN_EMERG "Unrecoverable VMX/Altivec Unavailable Exception "
"%lx at %lx\n", regs->trap, regs->nip);
die("Unrecoverable VMX/Altivec Unavailable Exception", regs, SIGABRT);
-
-bail:
- exception_exit(prev_state);
}
DEFINE_INTERRUPT_HANDLER(vsx_unavailable_exception)
diff --git a/arch/powerpc/mm/book3s64/hash_utils.c b/arch/powerpc/mm/book3s64/hash_utils.c
index a48c484b9e9b..39dcfaf7ba36 100644
--- a/arch/powerpc/mm/book3s64/hash_utils.c
+++ b/arch/powerpc/mm/book3s64/hash_utils.c
@@ -1289,7 +1289,6 @@ int hash_page_mm(struct mm_struct *mm, unsigned long ea,
unsigned long flags)
{
bool is_thp;
- enum ctx_state prev_state = exception_enter();
pgd_t *pgdir;
unsigned long vsid;
pte_t *ptep;
@@ -1489,7 +1488,6 @@ int hash_page_mm(struct mm_struct *mm, unsigned long ea,
DBG_LOW(" -> rc=%d\n", rc);
bail:
- exception_exit(prev_state);
return rc;
}
EXPORT_SYMBOL_GPL(hash_page_mm);
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index fd0c56c80c3c..4cc265e0364d 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -550,7 +550,6 @@ NOKPROBE_SYMBOL(__do_page_fault);
DEFINE_INTERRUPT_HANDLER_RET(do_page_fault)
{
- enum ctx_state prev_state = exception_enter();
unsigned long address = regs->dar;
unsigned long error_code = regs->dsisr;
long err;
@@ -573,8 +572,6 @@ DEFINE_INTERRUPT_HANDLER_RET(do_page_fault)
}
#endif
- exception_exit(prev_state);
-
return err;
}
NOKPROBE_SYMBOL(do_page_fault);
--
2.23.0
^ permalink raw reply related
* [PATCH 07/18] powerpc/64: context tracking remove _TIF_NOHZ
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Add context tracking to the system call handler explicitly, and remove
_TIF_NOHZ.
This saves 35 cycles on gettid system call cost on POWER9 with a
CONFIG_NOHZ_FULL kernel.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/Kconfig | 6 ------
arch/powerpc/Kconfig | 1 -
arch/powerpc/include/asm/thread_info.h | 4 +---
arch/powerpc/kernel/ptrace/ptrace.c | 4 ----
arch/powerpc/kernel/signal.c | 4 ----
arch/powerpc/kernel/syscall_64.c | 10 ++++++++++
6 files changed, 11 insertions(+), 18 deletions(-)
diff --git a/arch/Kconfig b/arch/Kconfig
index 56b6ccc0e32d..a0b6213f7820 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -618,12 +618,6 @@ config HAVE_CONTEXT_TRACKING
protected inside rcu_irq_enter/rcu_irq_exit() but preemption or signal
handling on irq exit still need to be protected.
-config HAVE_TIF_NOHZ
- bool
- help
- Arch relies on TIF_NOHZ and syscall slow path to implement context
- tracking calls to user_enter()/user_exit().
-
config HAVE_VIRT_CPU_ACCOUNTING
bool
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index e9f13fe08492..6eaf12a504f8 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -193,7 +193,6 @@ config PPC
select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
select HAVE_CONTEXT_TRACKING if PPC64
- select HAVE_TIF_NOHZ if PPC64
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DYNAMIC_FTRACE
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index 46a210b03d2b..c9443c16e5fb 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -95,7 +95,6 @@ void arch_setup_new_exec(void);
#define TIF_PATCH_PENDING 6 /* pending live patching update */
#define TIF_SYSCALL_AUDIT 7 /* syscall auditing active */
#define TIF_SINGLESTEP 8 /* singlestepping active */
-#define TIF_NOHZ 9 /* in adaptive nohz mode */
#define TIF_SECCOMP 10 /* secure computing */
#define TIF_RESTOREALL 11 /* Restore all regs (implies NOERROR) */
#define TIF_NOERROR 12 /* Force successful syscall return */
@@ -128,11 +127,10 @@ void arch_setup_new_exec(void);
#define _TIF_UPROBE (1<<TIF_UPROBE)
#define _TIF_SYSCALL_TRACEPOINT (1<<TIF_SYSCALL_TRACEPOINT)
#define _TIF_EMULATE_STACK_STORE (1<<TIF_EMULATE_STACK_STORE)
-#define _TIF_NOHZ (1<<TIF_NOHZ)
#define _TIF_SYSCALL_EMU (1<<TIF_SYSCALL_EMU)
#define _TIF_SYSCALL_DOTRACE (_TIF_SYSCALL_TRACE | _TIF_SYSCALL_AUDIT | \
_TIF_SECCOMP | _TIF_SYSCALL_TRACEPOINT | \
- _TIF_NOHZ | _TIF_SYSCALL_EMU)
+ _TIF_SYSCALL_EMU)
#define _TIF_USER_WORK_MASK (_TIF_SIGPENDING | _TIF_NEED_RESCHED | \
_TIF_NOTIFY_RESUME | _TIF_UPROBE | \
diff --git a/arch/powerpc/kernel/ptrace/ptrace.c b/arch/powerpc/kernel/ptrace/ptrace.c
index f6e51be47c6e..8970400e521c 100644
--- a/arch/powerpc/kernel/ptrace/ptrace.c
+++ b/arch/powerpc/kernel/ptrace/ptrace.c
@@ -290,8 +290,6 @@ long do_syscall_trace_enter(struct pt_regs *regs)
{
u32 flags;
- user_exit();
-
flags = READ_ONCE(current_thread_info()->flags) &
(_TIF_SYSCALL_EMU | _TIF_SYSCALL_TRACE);
@@ -368,8 +366,6 @@ void do_syscall_trace_leave(struct pt_regs *regs)
step = test_thread_flag(TIF_SINGLESTEP);
if (step || test_thread_flag(TIF_SYSCALL_TRACE))
tracehook_report_syscall_exit(regs, step);
-
- user_enter();
}
void __init pt_regs_check(void);
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index d2c356f37077..44ec7b34b27e 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -310,8 +310,6 @@ static void do_signal(struct task_struct *tsk)
void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
{
- user_exit();
-
if (thread_info_flags & _TIF_UPROBE)
uprobe_notify_resume(regs);
@@ -327,8 +325,6 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
tracehook_notify_resume(regs);
rseq_handle_notify_resume(NULL, regs);
}
-
- user_enter();
}
unsigned long get_tm_stackpointer(struct task_struct *tsk)
diff --git a/arch/powerpc/kernel/syscall_64.c b/arch/powerpc/kernel/syscall_64.c
index 15b628ae25fb..d9df6d14533e 100644
--- a/arch/powerpc/kernel/syscall_64.c
+++ b/arch/powerpc/kernel/syscall_64.c
@@ -1,9 +1,11 @@
// SPDX-License-Identifier: GPL-2.0-or-later
+#include <linux/context_tracking.h>
#include <linux/err.h>
#include <asm/asm-prototypes.h>
#include <asm/book3s/64/kup-radix.h>
#include <asm/cputime.h>
+#include <asm/interrupt.h>
#include <asm/hw_irq.h>
#include <asm/interrupt.h>
#include <asm/kprobes.h>
@@ -28,6 +30,9 @@ notrace long system_call_exception(long r3, long r4, long r5,
if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
BUG_ON(irq_soft_mask_return() != IRQS_ALL_DISABLED);
+ CT_WARN_ON(ct_state() == CONTEXT_KERNEL);
+ user_exit_irqoff();
+
trace_hardirqs_off(); /* finish reconciling */
if (IS_ENABLED(CONFIG_PPC_BOOK3S))
@@ -158,6 +163,8 @@ notrace unsigned long syscall_exit_prepare(unsigned long r3,
unsigned long ti_flags;
unsigned long ret = 0;
+ CT_WARN_ON(ct_state() == CONTEXT_USER);
+
kuap_check_amr();
regs->result = r3;
@@ -234,8 +241,11 @@ notrace unsigned long syscall_exit_prepare(unsigned long r3,
}
}
+ user_enter_irqoff();
+
/* scv need not set RI=0 because SRRs are not used */
if (unlikely(!prep_irq_for_enabled_exit(!scv))) {
+ user_exit_irqoff();
local_irq_enable();
goto again;
}
--
2.23.0
^ permalink raw reply related
* [PATCH 06/18] powerpc: add interrupt_cond_local_irq_enable helper
From: Nicholas Piggin @ 2020-11-05 14:34 UTC (permalink / raw)
To: linuxppc-dev; +Cc: Nicholas Piggin
In-Reply-To: <20201105143431.1874789-1-npiggin@gmail.com>
Simple helper for synchronous interrupt handlers to use to enable
interrupts if they were taken in interrupt-enabled context.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/include/asm/interrupt.h | 7 +++++++
arch/powerpc/kernel/traps.c | 24 +++++++-----------------
arch/powerpc/mm/fault.c | 4 +---
3 files changed, 15 insertions(+), 20 deletions(-)
diff --git a/arch/powerpc/include/asm/interrupt.h b/arch/powerpc/include/asm/interrupt.h
index c5ffcf144bbd..446e24b0eee1 100644
--- a/arch/powerpc/include/asm/interrupt.h
+++ b/arch/powerpc/include/asm/interrupt.h
@@ -3,6 +3,7 @@
#define _ASM_POWERPC_INTERRUPT_H
#include <linux/context_tracking.h>
+#include <linux/hardirq.h>
#include <asm/ftrace.h>
struct interrupt_state {
@@ -251,4 +252,10 @@ DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
void replay_system_reset(void);
void replay_soft_interrupts(void);
+static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
+{
+ if (!arch_irq_disabled_regs(regs))
+ local_irq_enable();
+}
+
#endif /* _ASM_POWERPC_INTERRUPT_H */
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index 823fa827a70e..2d19df1f6c05 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -343,8 +343,8 @@ static bool exception_common(int signr, struct pt_regs *regs, int code,
show_signal_msg(signr, regs, code, addr);
- if (arch_irqs_disabled() && !arch_irq_disabled_regs(regs))
- local_irq_enable();
+ if (arch_irqs_disabled())
+ interrupt_cond_local_irq_enable(regs);
current->thread.trap_nr = code;
@@ -1575,9 +1575,7 @@ DEFINE_INTERRUPT_HANDLER(program_check_exception)
if (!user_mode(regs))
goto sigill;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
/* (reason & REASON_ILLEGAL) would be the obvious thing here,
* but there seems to be a hardware bug on the 405GP (RevD)
@@ -1631,9 +1629,7 @@ DEFINE_INTERRUPT_HANDLER(alignment_exception)
int sig, code, fixed = 0;
unsigned long reason;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
reason = get_reason(regs);
@@ -1794,9 +1790,7 @@ DEFINE_INTERRUPT_HANDLER(facility_unavailable_exception)
die("Unexpected facility unavailable exception", regs, SIGABRT);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
if (status == FSCR_DSCR_LG) {
/*
@@ -2141,9 +2135,7 @@ void SPEFloatingPointException(struct pt_regs *regs)
int code = FPE_FLTUNK;
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
flush_spe_to_thread(current);
@@ -2190,9 +2182,7 @@ void SPEFloatingPointRoundException(struct pt_regs *regs)
extern int speround_handler(struct pt_regs *regs);
int err;
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
preempt_disable();
if (regs->msr & MSR_SPE)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index d1c5ef853860..fd0c56c80c3c 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -443,9 +443,7 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
return bad_area_nosemaphore(regs, address);
}
- /* We restore the interrupt state now */
- if (!arch_irq_disabled_regs(regs))
- local_irq_enable();
+ interrupt_cond_local_irq_enable(regs);
perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS, 1, regs, address);
--
2.23.0
^ permalink raw reply related
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