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-rw-r--r--arch/arm/boot/dts/imx53-ppd.dts2
-rw-r--r--arch/arm/boot/dts/imx6sll.dtsi2
-rw-r--r--arch/arm/boot/dts/imx6sx-sdb.dtsi7
-rw-r--r--arch/arm/boot/dts/vf610m4-colibri.dts4
-rw-r--r--arch/arm/configs/multi_v7_defconfig1
-rw-r--r--arch/arm/include/asm/cputype.h1
-rw-r--r--arch/arm/include/asm/pgtable-2level.h2
-rw-r--r--arch/arm/include/asm/proc-fns.h61
-rw-r--r--arch/arm/kernel/bugs.c4
-rw-r--r--arch/arm/kernel/head-common.S6
-rw-r--r--arch/arm/kernel/setup.c40
-rw-r--r--arch/arm/kernel/smp.c31
-rw-r--r--arch/arm/mach-omap2/display.c111
-rw-r--r--arch/arm/mm/proc-v7-bugs.c17
-rw-r--r--arch/arm/mm/proc-v7.S2
-rw-r--r--arch/arm/vfp/vfpmodule.c2
16 files changed, 179 insertions, 114 deletions
diff --git a/arch/arm/boot/dts/imx53-ppd.dts b/arch/arm/boot/dts/imx53-ppd.dts
index b560ff88459b..5ff9a179c83c 100644
--- a/arch/arm/boot/dts/imx53-ppd.dts
+++ b/arch/arm/boot/dts/imx53-ppd.dts
@@ -55,7 +55,7 @@
};
chosen {
- stdout-path = "&uart1:115200n8";
+ stdout-path = "serial0:115200n8";
};
memory@70000000 {
diff --git a/arch/arm/boot/dts/imx6sll.dtsi b/arch/arm/boot/dts/imx6sll.dtsi
index ed9a980bce85..beefa1b2049d 100644
--- a/arch/arm/boot/dts/imx6sll.dtsi
+++ b/arch/arm/boot/dts/imx6sll.dtsi
@@ -740,7 +740,7 @@
i2c1: i2c@21a0000 {
#address-cells = <1>;
#size-cells = <0>;
- compatible = "fs,imx6sll-i2c", "fsl,imx21-i2c";
+ compatible = "fsl,imx6sll-i2c", "fsl,imx21-i2c";
reg = <0x021a0000 0x4000>;
interrupts = <GIC_SPI 36 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&clks IMX6SLL_CLK_I2C1>;
diff --git a/arch/arm/boot/dts/imx6sx-sdb.dtsi b/arch/arm/boot/dts/imx6sx-sdb.dtsi
index 53b3408b5fab..7d7d679945d2 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dtsi
+++ b/arch/arm/boot/dts/imx6sx-sdb.dtsi
@@ -117,7 +117,9 @@
regulator-name = "enet_3v3";
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
- gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
+ gpio = <&gpio2 6 GPIO_ACTIVE_LOW>;
+ regulator-boot-on;
+ regulator-always-on;
};
reg_pcie_gpio: regulator-pcie-gpio {
@@ -180,6 +182,7 @@
phy-supply = <&reg_enet_3v3>;
phy-mode = "rgmii";
phy-handle = <&ethphy1>;
+ phy-reset-gpios = <&gpio2 7 GPIO_ACTIVE_LOW>;
status = "okay";
mdio {
@@ -373,6 +376,8 @@
MX6SX_PAD_RGMII1_RD3__ENET1_RX_DATA_3 0x3081
MX6SX_PAD_RGMII1_RX_CTL__ENET1_RX_EN 0x3081
MX6SX_PAD_ENET2_RX_CLK__ENET2_REF_CLK_25M 0x91
+ /* phy reset */
+ MX6SX_PAD_ENET2_CRS__GPIO2_IO_7 0x10b0
>;
};
diff --git a/arch/arm/boot/dts/vf610m4-colibri.dts b/arch/arm/boot/dts/vf610m4-colibri.dts
index 41ec66a96990..ca6249558760 100644
--- a/arch/arm/boot/dts/vf610m4-colibri.dts
+++ b/arch/arm/boot/dts/vf610m4-colibri.dts
@@ -50,8 +50,8 @@
compatible = "fsl,vf610m4";
chosen {
- bootargs = "console=ttyLP2,115200 clk_ignore_unused init=/linuxrc rw";
- stdout-path = "&uart2";
+ bootargs = "clk_ignore_unused init=/linuxrc rw";
+ stdout-path = "serial2:115200";
};
memory@8c000000 {
diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 1c7616815a86..63af6234c1b6 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -1,7 +1,6 @@
CONFIG_SYSVIPC=y
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
-CONFIG_PREEMPT=y
CONFIG_CGROUPS=y
CONFIG_BLK_DEV_INITRD=y
CONFIG_EMBEDDED=y
diff --git a/arch/arm/include/asm/cputype.h b/arch/arm/include/asm/cputype.h
index 0d289240b6ca..775cac3c02bb 100644
--- a/arch/arm/include/asm/cputype.h
+++ b/arch/arm/include/asm/cputype.h
@@ -111,6 +111,7 @@
#include <linux/kernel.h>
extern unsigned int processor_id;
+struct proc_info_list *lookup_processor(u32 midr);
#ifdef CONFIG_CPU_CP15
#define read_cpuid(reg) \
diff --git a/arch/arm/include/asm/pgtable-2level.h b/arch/arm/include/asm/pgtable-2level.h
index 92fd2c8a9af0..12659ce5c1f3 100644
--- a/arch/arm/include/asm/pgtable-2level.h
+++ b/arch/arm/include/asm/pgtable-2level.h
@@ -10,7 +10,7 @@
#ifndef _ASM_PGTABLE_2LEVEL_H
#define _ASM_PGTABLE_2LEVEL_H
-#define __PAGETABLE_PMD_FOLDED
+#define __PAGETABLE_PMD_FOLDED 1
/*
* Hardware-wise, we have a two level page table structure, where the first
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h
index e25f4392e1b2..e1b6f280ab08 100644
--- a/arch/arm/include/asm/proc-fns.h
+++ b/arch/arm/include/asm/proc-fns.h
@@ -23,7 +23,7 @@ struct mm_struct;
/*
* Don't change this structure - ASM code relies on it.
*/
-extern struct processor {
+struct processor {
/* MISC
* get data abort address/flags
*/
@@ -79,9 +79,13 @@ extern struct processor {
unsigned int suspend_size;
void (*do_suspend)(void *);
void (*do_resume)(void *);
-} processor;
+};
#ifndef MULTI_CPU
+static inline void init_proc_vtable(const struct processor *p)
+{
+}
+
extern void cpu_proc_init(void);
extern void cpu_proc_fin(void);
extern int cpu_do_idle(void);
@@ -98,17 +102,50 @@ extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn));
extern void cpu_do_suspend(void *);
extern void cpu_do_resume(void *);
#else
-#define cpu_proc_init processor._proc_init
-#define cpu_proc_fin processor._proc_fin
-#define cpu_reset processor.reset
-#define cpu_do_idle processor._do_idle
-#define cpu_dcache_clean_area processor.dcache_clean_area
-#define cpu_set_pte_ext processor.set_pte_ext
-#define cpu_do_switch_mm processor.switch_mm
-/* These three are private to arch/arm/kernel/suspend.c */
-#define cpu_do_suspend processor.do_suspend
-#define cpu_do_resume processor.do_resume
+extern struct processor processor;
+#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
+#include <linux/smp.h>
+/*
+ * This can't be a per-cpu variable because we need to access it before
+ * per-cpu has been initialised. We have a couple of functions that are
+ * called in a pre-emptible context, and so can't use smp_processor_id()
+ * there, hence PROC_TABLE(). We insist in init_proc_vtable() that the
+ * function pointers for these are identical across all CPUs.
+ */
+extern struct processor *cpu_vtable[];
+#define PROC_VTABLE(f) cpu_vtable[smp_processor_id()]->f
+#define PROC_TABLE(f) cpu_vtable[0]->f
+static inline void init_proc_vtable(const struct processor *p)
+{
+ unsigned int cpu = smp_processor_id();
+ *cpu_vtable[cpu] = *p;
+ WARN_ON_ONCE(cpu_vtable[cpu]->dcache_clean_area !=
+ cpu_vtable[0]->dcache_clean_area);
+ WARN_ON_ONCE(cpu_vtable[cpu]->set_pte_ext !=
+ cpu_vtable[0]->set_pte_ext);
+}
+#else
+#define PROC_VTABLE(f) processor.f
+#define PROC_TABLE(f) processor.f
+static inline void init_proc_vtable(const struct processor *p)
+{
+ processor = *p;
+}
+#endif
+
+#define cpu_proc_init PROC_VTABLE(_proc_init)
+#define cpu_check_bugs PROC_VTABLE(check_bugs)
+#define cpu_proc_fin PROC_VTABLE(_proc_fin)
+#define cpu_reset PROC_VTABLE(reset)
+#define cpu_do_idle PROC_VTABLE(_do_idle)
+#define cpu_dcache_clean_area PROC_TABLE(dcache_clean_area)
+#define cpu_set_pte_ext PROC_TABLE(set_pte_ext)
+#define cpu_do_switch_mm PROC_VTABLE(switch_mm)
+
+/* These two are private to arch/arm/kernel/suspend.c */
+#define cpu_do_suspend PROC_VTABLE(do_suspend)
+#define cpu_do_resume PROC_VTABLE(do_resume)
#endif
extern void cpu_resume(void);
diff --git a/arch/arm/kernel/bugs.c b/arch/arm/kernel/bugs.c
index 7be511310191..d41d3598e5e5 100644
--- a/arch/arm/kernel/bugs.c
+++ b/arch/arm/kernel/bugs.c
@@ -6,8 +6,8 @@
void check_other_bugs(void)
{
#ifdef MULTI_CPU
- if (processor.check_bugs)
- processor.check_bugs();
+ if (cpu_check_bugs)
+ cpu_check_bugs();
#endif
}
diff --git a/arch/arm/kernel/head-common.S b/arch/arm/kernel/head-common.S
index 6e0375e7db05..997b02302c31 100644
--- a/arch/arm/kernel/head-common.S
+++ b/arch/arm/kernel/head-common.S
@@ -145,6 +145,9 @@ __mmap_switched_data:
#endif
.size __mmap_switched_data, . - __mmap_switched_data
+ __FINIT
+ .text
+
/*
* This provides a C-API version of __lookup_processor_type
*/
@@ -156,9 +159,6 @@ ENTRY(lookup_processor_type)
ldmfd sp!, {r4 - r6, r9, pc}
ENDPROC(lookup_processor_type)
- __FINIT
- .text
-
/*
* Read processor ID register (CP#15, CR0), and look up in the linker-built
* supported processor list. Note that we can't use the absolute addresses
diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
index ac7e08886863..375b13f7e780 100644
--- a/arch/arm/kernel/setup.c
+++ b/arch/arm/kernel/setup.c
@@ -114,6 +114,11 @@ EXPORT_SYMBOL(elf_hwcap2);
#ifdef MULTI_CPU
struct processor processor __ro_after_init;
+#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
+struct processor *cpu_vtable[NR_CPUS] = {
+ [0] = &processor,
+};
+#endif
#endif
#ifdef MULTI_TLB
struct cpu_tlb_fns cpu_tlb __ro_after_init;
@@ -666,28 +671,33 @@ static void __init smp_build_mpidr_hash(void)
}
#endif
-static void __init setup_processor(void)
+/*
+ * locate processor in the list of supported processor types. The linker
+ * builds this table for us from the entries in arch/arm/mm/proc-*.S
+ */
+struct proc_info_list *lookup_processor(u32 midr)
{
- struct proc_info_list *list;
+ struct proc_info_list *list = lookup_processor_type(midr);
- /*
- * locate processor in the list of supported processor
- * types. The linker builds this table for us from the
- * entries in arch/arm/mm/proc-*.S
- */
- list = lookup_processor_type(read_cpuid_id());
if (!list) {
- pr_err("CPU configuration botched (ID %08x), unable to continue.\n",
- read_cpuid_id());
- while (1);
+ pr_err("CPU%u: configuration botched (ID %08x), CPU halted\n",
+ smp_processor_id(), midr);
+ while (1)
+ /* can't use cpu_relax() here as it may require MMU setup */;
}
+ return list;
+}
+
+static void __init setup_processor(void)
+{
+ unsigned int midr = read_cpuid_id();
+ struct proc_info_list *list = lookup_processor(midr);
+
cpu_name = list->cpu_name;
__cpu_architecture = __get_cpu_architecture();
-#ifdef MULTI_CPU
- processor = *list->proc;
-#endif
+ init_proc_vtable(list->proc);
#ifdef MULTI_TLB
cpu_tlb = *list->tlb;
#endif
@@ -699,7 +709,7 @@ static void __init setup_processor(void)
#endif
pr_info("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",
- cpu_name, read_cpuid_id(), read_cpuid_id() & 15,
+ list->cpu_name, midr, midr & 15,
proc_arch[cpu_architecture()], get_cr());
snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c",
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 0978282d5fc2..12a6172263c0 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -42,6 +42,7 @@
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
+#include <asm/procinfo.h>
#include <asm/processor.h>
#include <asm/sections.h>
#include <asm/tlbflush.h>
@@ -102,6 +103,30 @@ static unsigned long get_arch_pgd(pgd_t *pgd)
#endif
}
+#if defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR)
+static int secondary_biglittle_prepare(unsigned int cpu)
+{
+ if (!cpu_vtable[cpu])
+ cpu_vtable[cpu] = kzalloc(sizeof(*cpu_vtable[cpu]), GFP_KERNEL);
+
+ return cpu_vtable[cpu] ? 0 : -ENOMEM;
+}
+
+static void secondary_biglittle_init(void)
+{
+ init_proc_vtable(lookup_processor(read_cpuid_id())->proc);
+}
+#else
+static int secondary_biglittle_prepare(unsigned int cpu)
+{
+ return 0;
+}
+
+static void secondary_biglittle_init(void)
+{
+}
+#endif
+
int __cpu_up(unsigned int cpu, struct task_struct *idle)
{
int ret;
@@ -109,6 +134,10 @@ int __cpu_up(unsigned int cpu, struct task_struct *idle)
if (!smp_ops.smp_boot_secondary)
return -ENOSYS;
+ ret = secondary_biglittle_prepare(cpu);
+ if (ret)
+ return ret;
+
/*
* We need to tell the secondary core where to find
* its stack and the page tables.
@@ -359,6 +388,8 @@ asmlinkage void secondary_start_kernel(void)
struct mm_struct *mm = &init_mm;
unsigned int cpu;
+ secondary_biglittle_init();
+
/*
* The identity mapping is uncached (strongly ordered), so
* switch away from it before attempting any exclusive accesses.
diff --git a/arch/arm/mach-omap2/display.c b/arch/arm/mach-omap2/display.c
index 9500b6e27380..f86b72d1d59e 100644
--- a/arch/arm/mach-omap2/display.c
+++ b/arch/arm/mach-omap2/display.c
@@ -209,11 +209,61 @@ static int __init omapdss_init_fbdev(void)
return 0;
}
-#else
-static inline int omapdss_init_fbdev(void)
+
+static const char * const omapdss_compat_names[] __initconst = {
+ "ti,omap2-dss",
+ "ti,omap3-dss",
+ "ti,omap4-dss",
+ "ti,omap5-dss",
+ "ti,dra7-dss",
+};
+
+static struct device_node * __init omapdss_find_dss_of_node(void)
{
- return 0;
+ struct device_node *node;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(omapdss_compat_names); ++i) {
+ node = of_find_compatible_node(NULL, NULL,
+ omapdss_compat_names[i]);
+ if (node)
+ return node;
+ }
+
+ return NULL;
}
+
+static int __init omapdss_init_of(void)
+{
+ int r;
+ struct device_node *node;
+ struct platform_device *pdev;
+
+ /* only create dss helper devices if dss is enabled in the .dts */
+
+ node = omapdss_find_dss_of_node();
+ if (!node)
+ return 0;
+
+ if (!of_device_is_available(node))
+ return 0;
+
+ pdev = of_find_device_by_node(node);
+
+ if (!pdev) {
+ pr_err("Unable to find DSS platform device\n");
+ return -ENODEV;
+ }
+
+ r = of_platform_populate(node, NULL, NULL, &pdev->dev);
+ if (r) {
+ pr_err("Unable to populate DSS submodule devices\n");
+ return r;
+ }
+
+ return omapdss_init_fbdev();
+}
+omap_device_initcall(omapdss_init_of);
#endif /* CONFIG_FB_OMAP2 */
static void dispc_disable_outputs(void)
@@ -361,58 +411,3 @@ int omap_dss_reset(struct omap_hwmod *oh)
return r;
}
-
-static const char * const omapdss_compat_names[] __initconst = {
- "ti,omap2-dss",
- "ti,omap3-dss",
- "ti,omap4-dss",
- "ti,omap5-dss",
- "ti,dra7-dss",
-};
-
-static struct device_node * __init omapdss_find_dss_of_node(void)
-{
- struct device_node *node;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(omapdss_compat_names); ++i) {
- node = of_find_compatible_node(NULL, NULL,
- omapdss_compat_names[i]);
- if (node)
- return node;
- }
-
- return NULL;
-}
-
-static int __init omapdss_init_of(void)
-{
- int r;
- struct device_node *node;
- struct platform_device *pdev;
-
- /* only create dss helper devices if dss is enabled in the .dts */
-
- node = omapdss_find_dss_of_node();
- if (!node)
- return 0;
-
- if (!of_device_is_available(node))
- return 0;
-
- pdev = of_find_device_by_node(node);
-
- if (!pdev) {
- pr_err("Unable to find DSS platform device\n");
- return -ENODEV;
- }
-
- r = of_platform_populate(node, NULL, NULL, &pdev->dev);
- if (r) {
- pr_err("Unable to populate DSS submodule devices\n");
- return r;
- }
-
- return omapdss_init_fbdev();
-}
-omap_device_initcall(omapdss_init_of);
diff --git a/arch/arm/mm/proc-v7-bugs.c b/arch/arm/mm/proc-v7-bugs.c
index 5544b82a2e7a..9a07916af8dd 100644
--- a/arch/arm/mm/proc-v7-bugs.c
+++ b/arch/arm/mm/proc-v7-bugs.c
@@ -52,8 +52,6 @@ static void cpu_v7_spectre_init(void)
case ARM_CPU_PART_CORTEX_A17:
case ARM_CPU_PART_CORTEX_A73:
case ARM_CPU_PART_CORTEX_A75:
- if (processor.switch_mm != cpu_v7_bpiall_switch_mm)
- goto bl_error;
per_cpu(harden_branch_predictor_fn, cpu) =
harden_branch_predictor_bpiall;
spectre_v2_method = "BPIALL";
@@ -61,8 +59,6 @@ static void cpu_v7_spectre_init(void)
case ARM_CPU_PART_CORTEX_A15:
case ARM_CPU_PART_BRAHMA_B15:
- if (processor.switch_mm != cpu_v7_iciallu_switch_mm)
- goto bl_error;
per_cpu(harden_branch_predictor_fn, cpu) =
harden_branch_predictor_iciallu;
spectre_v2_method = "ICIALLU";
@@ -88,11 +84,9 @@ static void cpu_v7_spectre_init(void)
ARM_SMCCC_ARCH_WORKAROUND_1, &res);
if ((int)res.a0 != 0)
break;
- if (processor.switch_mm != cpu_v7_hvc_switch_mm && cpu)
- goto bl_error;
per_cpu(harden_branch_predictor_fn, cpu) =
call_hvc_arch_workaround_1;
- processor.switch_mm = cpu_v7_hvc_switch_mm;
+ cpu_do_switch_mm = cpu_v7_hvc_switch_mm;
spectre_v2_method = "hypervisor";
break;
@@ -101,11 +95,9 @@ static void cpu_v7_spectre_init(void)
ARM_SMCCC_ARCH_WORKAROUND_1, &res);
if ((int)res.a0 != 0)
break;
- if (processor.switch_mm != cpu_v7_smc_switch_mm && cpu)
- goto bl_error;
per_cpu(harden_branch_predictor_fn, cpu) =
call_smc_arch_workaround_1;
- processor.switch_mm = cpu_v7_smc_switch_mm;
+ cpu_do_switch_mm = cpu_v7_smc_switch_mm;
spectre_v2_method = "firmware";
break;
@@ -119,11 +111,6 @@ static void cpu_v7_spectre_init(void)
if (spectre_v2_method)
pr_info("CPU%u: Spectre v2: using %s workaround\n",
smp_processor_id(), spectre_v2_method);
- return;
-
-bl_error:
- pr_err("CPU%u: Spectre v2: incorrect context switching function, system vulnerable\n",
- cpu);
}
#else
static void cpu_v7_spectre_init(void)
diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S
index 6fe52819e014..339eb17c9808 100644
--- a/arch/arm/mm/proc-v7.S
+++ b/arch/arm/mm/proc-v7.S
@@ -112,7 +112,7 @@ ENTRY(cpu_v7_hvc_switch_mm)
hvc #0
ldmfd sp!, {r0 - r3}
b cpu_v7_switch_mm
-ENDPROC(cpu_v7_smc_switch_mm)
+ENDPROC(cpu_v7_hvc_switch_mm)
#endif
ENTRY(cpu_v7_iciallu_switch_mm)
mov r3, #0
diff --git a/arch/arm/vfp/vfpmodule.c b/arch/arm/vfp/vfpmodule.c
index aff6e6eadc70..ee7b07938dd5 100644
--- a/arch/arm/vfp/vfpmodule.c
+++ b/arch/arm/vfp/vfpmodule.c
@@ -573,7 +573,7 @@ int vfp_preserve_user_clear_hwstate(struct user_vfp *ufp,
*/
ufp_exc->fpexc = hwstate->fpexc;
ufp_exc->fpinst = hwstate->fpinst;
- ufp_exc->fpinst2 = ufp_exc->fpinst2;
+ ufp_exc->fpinst2 = hwstate->fpinst2;
/* Ensure that VFP is disabled. */
vfp_flush_hwstate(thread);
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-27 16:14:03 +0000