On 16/02/17 12:47, Auger Eric wrote:
> Hi Marc,
>
> On 17/01/2017 11:20, Marc Zyngier wrote:
>> In order to discover the VLPI properties, we need to iterate over
>> the redistributor regions. As we already have code that does this,
>> let's factor it out and make it slightly more generic.
>>
>> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
>> ---
>> drivers/irqchip/irq-gic-v3.c | 77 ++++++++++++++++++++++++++++++++------------
>> 1 file changed, 56 insertions(+), 21 deletions(-)
>>
>> diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c
>> index c132f29..5cadec0 100644
>> --- a/drivers/irqchip/irq-gic-v3.c
>> +++ b/drivers/irqchip/irq-gic-v3.c
>> @@ -421,24 +421,15 @@ static void __init gic_dist_init(void)
>> gic_write_irouter(affinity, base + GICD_IROUTER + i * 8);
>> }
>>
>> -static int gic_populate_rdist(void)
>> +static int gic_scan_rdist_properties(int (*fn)(struct redist_region *,
>> + void __iomem *))
>> {
>> - unsigned long mpidr = cpu_logical_map(smp_processor_id());
>> - u64 typer;
>> - u32 aff;
>> + int ret = 0;
> in case
> if (reg != GIC_PIDR2_ARCH_GICv3 &&
> reg != GIC_PIDR2_ARCH_GICv4) is true you now return 0. Don' you
> want to return -ENODEV as before?
>
>
>> int i;
>>
>> - /*
>> - * Convert affinity to a 32bit value that can be matched to
>> - * GICR_TYPER bits [63:32].
>> - */
>> - aff = (MPIDR_AFFINITY_LEVEL(mpidr, 3) << 24 |
>> - MPIDR_AFFINITY_LEVEL(mpidr, 2) << 16 |
>> - MPIDR_AFFINITY_LEVEL(mpidr, 1) << 8 |
>> - MPIDR_AFFINITY_LEVEL(mpidr, 0));
>> -
>> for (i = 0; i < gic_data.nr_redist_regions; i++) {
>> void __iomem *ptr = gic_data.redist_regions[i].redist_base;
>> + u64 typer;
>> u32 reg;
>>
>> reg = readl_relaxed(ptr + GICR_PIDR2) & GIC_PIDR2_ARCH_MASK;
>> @@ -450,14 +441,14 @@ static int gic_populate_rdist(void)
>>
>> do {
>> typer = gic_read_typer(ptr + GICR_TYPER);
>> - if ((typer >> 32) == aff) {
>> - 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 %lx region %d:%pa\n",
>> - smp_processor_id(), mpidr, i,
>> - &gic_data_rdist()->phys_base);
>> + ret = fn(gic_data.redist_regions + i, ptr);
>> + switch (ret) {
>> + case 0:
>> return 0;
>> + case -1:
>> + break;
>> + default:
>> + ret = 0;
>> }
>>
>> if (gic_data.redist_regions[i].single_redist)
>> @@ -473,9 +464,53 @@ static int gic_populate_rdist(void)
>> } while (!(typer & GICR_TYPER_LAST));
>> }
> Assuming you don't find the TYPER that matches the cpu (I don't know if
> it is possible), last fn() call will return 1 and the function will
> return 0. Before it returned -ENODEV I think.
Yeah, the whole thing was quite messy. I've (hopefully) fixed it now.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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