irqchip/gic-v3: Add quirk for msm8996 broken registers
Access to GICR_WAKER is restricted on msm8996 SoC in Hypervisor. Its been more than 2+ years of wait for this to be fixed, which has no hopes to be fixed. This change was introduced for the "lead device" on msm8996 platform. It looks like all publicly available msm8996 and other Qualcomm SoCs have this implementation. So add a quirk to not access this register on msm8996. With this quirk MSM8996 can at least boot out of mainline, which can help community to work with boards based on MSM8996 and other SoCs with have this restrictions. This Quirk is based on device tree compatible string. Without this patch Qualcomm DB820c board reboots when GICR_WAKER is accessed. Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
This commit is contained in:
parent
f70fdb42a0
commit
9c8114c20d
|
@ -41,6 +41,8 @@
|
||||||
|
|
||||||
#include "irq-gic-common.h"
|
#include "irq-gic-common.h"
|
||||||
|
|
||||||
|
#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0)
|
||||||
|
|
||||||
struct redist_region {
|
struct redist_region {
|
||||||
void __iomem *redist_base;
|
void __iomem *redist_base;
|
||||||
phys_addr_t phys_base;
|
phys_addr_t phys_base;
|
||||||
|
@ -55,6 +57,7 @@ struct gic_chip_data {
|
||||||
struct irq_domain *domain;
|
struct irq_domain *domain;
|
||||||
u64 redist_stride;
|
u64 redist_stride;
|
||||||
u32 nr_redist_regions;
|
u32 nr_redist_regions;
|
||||||
|
u64 flags;
|
||||||
bool has_rss;
|
bool has_rss;
|
||||||
unsigned int irq_nr;
|
unsigned int irq_nr;
|
||||||
struct partition_desc *ppi_descs[16];
|
struct partition_desc *ppi_descs[16];
|
||||||
|
@ -139,6 +142,9 @@ static void gic_enable_redist(bool enable)
|
||||||
u32 count = 1000000; /* 1s! */
|
u32 count = 1000000; /* 1s! */
|
||||||
u32 val;
|
u32 val;
|
||||||
|
|
||||||
|
if (gic_data.flags & FLAGS_WORKAROUND_GICR_WAKER_MSM8996)
|
||||||
|
return;
|
||||||
|
|
||||||
rbase = gic_data_rdist_rd_base();
|
rbase = gic_data_rdist_rd_base();
|
||||||
|
|
||||||
val = readl_relaxed(rbase + GICR_WAKER);
|
val = readl_relaxed(rbase + GICR_WAKER);
|
||||||
|
@ -1067,6 +1073,15 @@ static const struct irq_domain_ops partition_domain_ops = {
|
||||||
.select = gic_irq_domain_select,
|
.select = gic_irq_domain_select,
|
||||||
};
|
};
|
||||||
|
|
||||||
|
static bool gic_enable_quirk_msm8996(void *data)
|
||||||
|
{
|
||||||
|
struct gic_chip_data *d = data;
|
||||||
|
|
||||||
|
d->flags |= FLAGS_WORKAROUND_GICR_WAKER_MSM8996;
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
static int __init gic_init_bases(void __iomem *dist_base,
|
static int __init gic_init_bases(void __iomem *dist_base,
|
||||||
struct redist_region *rdist_regs,
|
struct redist_region *rdist_regs,
|
||||||
u32 nr_redist_regions,
|
u32 nr_redist_regions,
|
||||||
|
@ -1272,6 +1287,11 @@ static void __init gic_of_setup_kvm_info(struct device_node *node)
|
||||||
}
|
}
|
||||||
|
|
||||||
static const struct gic_quirk gic_quirks[] = {
|
static const struct gic_quirk gic_quirks[] = {
|
||||||
|
{
|
||||||
|
.desc = "GICv3: Qualcomm MSM8996 broken firmware",
|
||||||
|
.compatible = "qcom,msm8996-gic-v3",
|
||||||
|
.init = gic_enable_quirk_msm8996,
|
||||||
|
},
|
||||||
{
|
{
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
Loading…
Reference in a new issue