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authorAtish Patra <atish.patra@wdc.com>2018-10-02 12:15:05 -0700
committerPalmer Dabbelt <palmer@sifive.com>2018-10-22 17:03:37 -0700
commitf99fb607fb2bc0d4ce6b9adb764c65e37f40a92b (patch)
tree082100e81815f6c2fa5d152821d24351aa16a871 /drivers/irqchip
parent6825c7a80f1863b975a00042abe140ea24813af2 (diff)
downloadlinux-f99fb607fb2bc0d4ce6b9adb764c65e37f40a92b.tar.bz2
RISC-V: Use Linux logical CPU number instead of hartid
Setup the cpu_logical_map during boot. Moreover, every SBI call and PLIC context are based on the physical hartid. Use the logical CPU to hartid mapping to pass correct hartid to respective functions. Signed-off-by: Atish Patra <atish.patra@wdc.com> Reviewed-by: Anup Patel <anup@brainfault.org> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'drivers/irqchip')
-rw-r--r--drivers/irqchip/irq-sifive-plic.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index c55eaa31cde2..357e9daf94ae 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -15,6 +15,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/spinlock.h>
+#include <asm/smp.h>
/*
* This driver implements a version of the RISC-V PLIC with the actual layout
@@ -218,7 +219,7 @@ static int __init plic_init(struct device_node *node,
struct of_phandle_args parent;
struct plic_handler *handler;
irq_hw_number_t hwirq;
- int cpu;
+ int cpu, hartid;
if (of_irq_parse_one(node, i, &parent)) {
pr_err("failed to parse parent for context %d.\n", i);
@@ -229,12 +230,13 @@ static int __init plic_init(struct device_node *node,
if (parent.args[0] == -1)
continue;
- cpu = plic_find_hart_id(parent.np);
- if (cpu < 0) {
+ hartid = plic_find_hart_id(parent.np);
+ if (hartid < 0) {
pr_warn("failed to parse hart ID for context %d.\n", i);
continue;
}
+ cpu = riscv_hartid_to_cpuid(hartid);
handler = per_cpu_ptr(&plic_handlers, cpu);
handler->present = true;
handler->ctxid = i;