Commit 92c22755 authored by Thomas Gleixner's avatar Thomas Gleixner

Merge tag 'irqchip-fixes-5.6-2' of...

Merge tag 'irqchip-fixes-5.6-2' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/urgent

Pull irqchip fixes from Marc Zyngier:

- Add workaround for Cavium/Marvell ThunderX unimplemented GIC registers
parents 2546287c d01fd161
...@@ -110,6 +110,8 @@ stable kernels. ...@@ -110,6 +110,8 @@ stable kernels.
+----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 | | Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 |
+----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX GICv3 | #38539 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 | | Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |
+----------------+-----------------+-----------------+-----------------------------+ +----------------+-----------------+-----------------+-----------------------------+
| Cavium | ThunderX Core | #30115 | CAVIUM_ERRATUM_30115 | | Cavium | ThunderX Core | #30115 | CAVIUM_ERRATUM_30115 |
......
...@@ -34,6 +34,7 @@ ...@@ -34,6 +34,7 @@
#define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80) #define GICD_INT_NMI_PRI (GICD_INT_DEF_PRI & ~0x80)
#define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0) #define FLAGS_WORKAROUND_GICR_WAKER_MSM8996 (1ULL << 0)
#define FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539 (1ULL << 1)
struct redist_region { struct redist_region {
void __iomem *redist_base; void __iomem *redist_base;
...@@ -1464,6 +1465,15 @@ static bool gic_enable_quirk_msm8996(void *data) ...@@ -1464,6 +1465,15 @@ static bool gic_enable_quirk_msm8996(void *data)
return true; return true;
} }
static bool gic_enable_quirk_cavium_38539(void *data)
{
struct gic_chip_data *d = data;
d->flags |= FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539;
return true;
}
static bool gic_enable_quirk_hip06_07(void *data) static bool gic_enable_quirk_hip06_07(void *data)
{ {
struct gic_chip_data *d = data; struct gic_chip_data *d = data;
...@@ -1502,6 +1512,19 @@ static const struct gic_quirk gic_quirks[] = { ...@@ -1502,6 +1512,19 @@ static const struct gic_quirk gic_quirks[] = {
.mask = 0xffffffff, .mask = 0xffffffff,
.init = gic_enable_quirk_hip06_07, .init = gic_enable_quirk_hip06_07,
}, },
{
/*
* Reserved register accesses generate a Synchronous
* External Abort. This erratum applies to:
* - ThunderX: CN88xx
* - OCTEON TX: CN83xx, CN81xx
* - OCTEON TX2: CN93xx, CN96xx, CN98xx, CNF95xx*
*/
.desc = "GICv3: Cavium erratum 38539",
.iidr = 0xa000034c,
.mask = 0xe8f00fff,
.init = gic_enable_quirk_cavium_38539,
},
{ {
} }
}; };
...@@ -1577,6 +1600,11 @@ static int __init gic_init_bases(void __iomem *dist_base, ...@@ -1577,6 +1600,11 @@ static int __init gic_init_bases(void __iomem *dist_base,
pr_info("%d SPIs implemented\n", GIC_LINE_NR - 32); pr_info("%d SPIs implemented\n", GIC_LINE_NR - 32);
pr_info("%d Extended SPIs implemented\n", GIC_ESPI_NR); pr_info("%d Extended SPIs implemented\n", GIC_ESPI_NR);
/*
* ThunderX1 explodes on reading GICD_TYPER2, in violation of the
* architecture spec (which says that reserved registers are RES0).
*/
if (!(gic_data.flags & FLAGS_WORKAROUND_CAVIUM_ERRATUM_38539))
gic_data.rdists.gicd_typer2 = readl_relaxed(gic_data.dist_base + GICD_TYPER2); gic_data.rdists.gicd_typer2 = readl_relaxed(gic_data.dist_base + GICD_TYPER2);
gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops, gic_data.domain = irq_domain_create_tree(handle, &gic_irq_domain_ops,
......
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