[PATCH v3 2/6] arm64: GICv3: change unsigned types for AArch32 compatibility
From: Jean-Philippe Brucker
Date: Thu Oct 01 2015 - 08:48:37 EST
This patch does a few simple compatibility-related changes:
- change the system register access prototypes to their actual size,
- homogenise mpidr accesses with unsigned long,
- force the 64bit register values to unsigned long long.
Note: the list registers are 64bit on GICv3, but the AArch32 vGIC driver
will need to split their values into two 32bit registers: LRn and LRCn.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@xxxxxxx>
---
arch/arm64/include/asm/arch_gicv3.h | 35 ++++++++++++++++++++---------------
drivers/irqchip/irq-gic-v3.c | 25 ++++++++++++-------------
include/linux/irqchip/arm-gic-v3.h | 18 +++++++++---------
3 files changed, 41 insertions(+), 37 deletions(-)
diff --git a/arch/arm64/include/asm/arch_gicv3.h b/arch/arm64/include/asm/arch_gicv3.h
index e6b68a8..bd8f005 100644
--- a/arch/arm64/include/asm/arch_gicv3.h
+++ b/arch/arm64/include/asm/arch_gicv3.h
@@ -78,21 +78,26 @@
#include <linux/stringify.h>
-/* Low level accessors */
+/*
+ * Low-level accessors
+ *
+ * These system registers are 32 bits, but we make sure that the compiler
+ * sets the GP register's most significant bits to 0 with an explicit cast.
+ */
-static inline void gic_write_eoir(u64 irq)
+static inline void gic_write_eoir(u32 irq)
{
- asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" (irq));
+ asm volatile("msr_s " __stringify(ICC_EOIR1_EL1) ", %0" : : "r" ((u64)irq));
isb();
}
-static inline void gic_write_dir(u64 irq)
+static inline void gic_write_dir(u32 irq)
{
- asm volatile("msr_s " __stringify(ICC_DIR_EL1) ", %0" : : "r" (irq));
+ asm volatile("msr_s " __stringify(ICC_DIR_EL1) ", %0" : : "r" ((u64)irq));
isb();
}
-static inline u64 gic_read_iar(void)
+static inline u32 gic_read_iar(void)
{
u64 irqstat;
@@ -100,20 +105,20 @@ static inline u64 gic_read_iar(void)
return irqstat;
}
-static inline void gic_write_pmr(u64 val)
+static inline void gic_write_pmr(u32 val)
{
- asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" (val));
+ asm volatile("msr_s " __stringify(ICC_PMR_EL1) ", %0" : : "r" ((u64)val));
}
-static inline void gic_write_ctlr(u64 val)
+static inline void gic_write_ctlr(u32 val)
{
- asm volatile("msr_s " __stringify(ICC_CTLR_EL1) ", %0" : : "r" (val));
+ asm volatile("msr_s " __stringify(ICC_CTLR_EL1) ", %0" : : "r" ((u64)val));
isb();
}
-static inline void gic_write_grpen1(u64 val)
+static inline void gic_write_grpen1(u32 val)
{
- asm volatile("msr_s " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" (val));
+ asm volatile("msr_s " __stringify(ICC_GRPEN1_EL1) ", %0" : : "r" ((u64)val));
isb();
}
@@ -122,7 +127,7 @@ static inline void gic_write_sgi1r(u64 val)
asm volatile("msr_s " __stringify(ICC_SGI1R_EL1) ", %0" : : "r" (val));
}
-static inline u64 gic_read_sre(void)
+static inline u32 gic_read_sre(void)
{
u64 val;
@@ -130,9 +135,9 @@ static inline u64 gic_read_sre(void)
return val;
}
-static inline void gic_write_sre(u64 val)
+static inline void gic_write_sre(u32 val)
{
- asm volatile("msr_s " __stringify(ICC_SRE_EL1) ", %0" : : "r" (val));
+ asm volatile("msr_s " __stringify(ICC_SRE_EL1) ", %0" : : "r" ((u64)val));
isb();
}
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
index a08eda8..0fb8d6d 100644
--- a/drivers/irqchip/irq-gic-v3.c
+++ b/drivers/irqchip/irq-gic-v3.c
@@ -327,11 +327,11 @@ static int gic_irq_set_vcpu_affinity(struct irq_data *d, void *vcpu)
return 0;
}
-static u64 gic_mpidr_to_affinity(u64 mpidr)
+static u64 gic_mpidr_to_affinity(unsigned long mpidr)
{
u64 aff;
- aff = (MPIDR_AFFINITY_LEVEL(mpidr, 3) << 32 |
+ aff = ((u64)MPIDR_AFFINITY_LEVEL(mpidr, 3) << 32 |
MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
MPIDR_AFFINITY_LEVEL(mpidr, 0));
@@ -341,7 +341,7 @@ static u64 gic_mpidr_to_affinity(u64 mpidr)
static asmlinkage void __exception_irq_entry gic_handle_irq(struct pt_regs *regs)
{
- u64 irqnr;
+ u32 irqnr;
do {
irqnr = gic_read_iar();
@@ -405,7 +405,7 @@ static void __init gic_dist_init(void)
static int gic_populate_rdist(void)
{
- u64 mpidr = cpu_logical_map(smp_processor_id());
+ unsigned long mpidr = cpu_logical_map(smp_processor_id());
u64 typer;
u32 aff;
int i;
@@ -436,10 +436,9 @@ static int gic_populate_rdist(void)
u64 offset = ptr - gic_data.redist_regions[i].redist_base;
gic_data_rdist_rd_base() = ptr;
gic_data_rdist()->phys_base = gic_data.redist_regions[i].phys_base + offset;
- pr_info("CPU%d: found redistributor %llx region %d:%pa\n",
- smp_processor_id(),
- (unsigned long long)mpidr,
- i, &gic_data_rdist()->phys_base);
+ pr_info("CPU%d: found redistributor %lx region %d:%pa\n",
+ smp_processor_id(), mpidr, i,
+ &gic_data_rdist()->phys_base);
return 0;
}
@@ -454,8 +453,8 @@ static int gic_populate_rdist(void)
}
/* We couldn't even deal with ourselves... */
- WARN(true, "CPU%d: mpidr %llx has no re-distributor!\n",
- smp_processor_id(), (unsigned long long)mpidr);
+ WARN(true, "CPU%d: mpidr %lx has no re-distributor!\n",
+ smp_processor_id(), mpidr);
return -ENODEV;
}
@@ -525,10 +524,10 @@ static struct notifier_block gic_cpu_notifier = {
};
static u16 gic_compute_target_list(int *base_cpu, const struct cpumask *mask,
- u64 cluster_id)
+ unsigned long cluster_id)
{
int cpu = *base_cpu;
- u64 mpidr = cpu_logical_map(cpu);
+ unsigned long mpidr = cpu_logical_map(cpu);
u16 tlist = 0;
while (cpu < nr_cpu_ids) {
@@ -589,7 +588,7 @@ static void gic_raise_softirq(const struct cpumask *mask, unsigned int irq)
smp_wmb();
for_each_cpu(cpu, mask) {
- u64 cluster_id = cpu_logical_map(cpu) & ~0xffUL;
+ unsigned long cluster_id = cpu_logical_map(cpu) & ~0xffUL;
u16 tlist;
tlist = gic_compute_target_list(&cpu, mask, cluster_id);
diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
index 5ab6e37..47663c6 100644
--- a/include/linux/irqchip/arm-gic-v3.h
+++ b/include/linux/irqchip/arm-gic-v3.h
@@ -264,16 +264,16 @@
/*
* Hypervisor interface registers (SRE only)
*/
-#define ICH_LR_VIRTUAL_ID_MASK ((1UL << 32) - 1)
-
-#define ICH_LR_EOI (1UL << 41)
-#define ICH_LR_GROUP (1UL << 60)
-#define ICH_LR_HW (1UL << 61)
-#define ICH_LR_STATE (3UL << 62)
-#define ICH_LR_PENDING_BIT (1UL << 62)
-#define ICH_LR_ACTIVE_BIT (1UL << 63)
+#define ICH_LR_VIRTUAL_ID_MASK ((1ULL << 32) - 1)
+
+#define ICH_LR_EOI (1ULL << 41)
+#define ICH_LR_GROUP (1ULL << 60)
+#define ICH_LR_HW (1ULL << 61)
+#define ICH_LR_STATE (3ULL << 62)
+#define ICH_LR_PENDING_BIT (1ULL << 62)
+#define ICH_LR_ACTIVE_BIT (1ULL << 63)
#define ICH_LR_PHYS_ID_SHIFT 32
-#define ICH_LR_PHYS_ID_MASK (0x3ffUL << ICH_LR_PHYS_ID_SHIFT)
+#define ICH_LR_PHYS_ID_MASK (0x3ffULL << ICH_LR_PHYS_ID_SHIFT)
#define ICH_MISR_EOI (1 << 0)
#define ICH_MISR_U (1 << 1)
--
1.7.9.5
--
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