irqchip/gicv3-its: Workaround for Cavium ThunderX errata 22375, 24313
This implements two gicv3-its errata workarounds for ThunderX. Both with small impact affecting only ITS table allocation. erratum 22375: only alloc 8MB table size erratum 24313: ignore memory access type The fixes are in ITS initialization and basically ignore memory access type and table size provided by the TYPER and BASER registers. Signed-off-by: Ganapatrao Kulkarni <gkulkarni@caviumnetworks.com> Signed-off-by: Robert Richter <rrichter@cavium.com> Reviewed-by: Marc Zygnier <marc.zyngier@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Tirumalesh Chalamarla <tchalamarla@cavium.com> Cc: linux-arm-kernel@lists.infradead.org Cc: Jason Cooper <jason@lakedaemon.net> Cc: Will Deacon <will.deacon@arm.com> Link: http://lkml.kernel.org/r/1442869119-1814-6-git-send-email-rric@kernel.org Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
parent
67510ccafb
commit
9410097074
2 changed files with 50 additions and 4 deletions
|
@ -348,6 +348,23 @@ config ARM64_ERRATUM_843419
|
||||||
|
|
||||||
If unsure, say Y.
|
If unsure, say Y.
|
||||||
|
|
||||||
|
config CAVIUM_ERRATUM_22375
|
||||||
|
bool "Cavium erratum 22375, 24313"
|
||||||
|
default y
|
||||||
|
help
|
||||||
|
Enable workaround for erratum 22375, 24313.
|
||||||
|
|
||||||
|
This implements two gicv3-its errata workarounds for ThunderX. Both
|
||||||
|
with small impact affecting only ITS table allocation.
|
||||||
|
|
||||||
|
erratum 22375: only alloc 8MB table size
|
||||||
|
erratum 24313: ignore memory access type
|
||||||
|
|
||||||
|
The fixes are in ITS initialization and basically ignore memory access
|
||||||
|
type and table size provided by the TYPER and BASER registers.
|
||||||
|
|
||||||
|
If unsure, say Y.
|
||||||
|
|
||||||
config CAVIUM_ERRATUM_23154
|
config CAVIUM_ERRATUM_23154
|
||||||
bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed"
|
bool "Cavium erratum 23154: Access to ICC_IAR1_EL1 is not sync'ed"
|
||||||
default y
|
default y
|
||||||
|
|
|
@ -39,7 +39,8 @@
|
||||||
|
|
||||||
#include "irq-gic-common.h"
|
#include "irq-gic-common.h"
|
||||||
|
|
||||||
#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1 << 0)
|
#define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0)
|
||||||
|
#define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1)
|
||||||
|
|
||||||
#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0)
|
#define RDIST_FLAGS_PROPBASE_NEEDS_FLUSHING (1 << 0)
|
||||||
|
|
||||||
|
@ -816,9 +817,22 @@ static int its_alloc_tables(const char *node_name, struct its_node *its)
|
||||||
int i;
|
int i;
|
||||||
int psz = SZ_64K;
|
int psz = SZ_64K;
|
||||||
u64 shr = GITS_BASER_InnerShareable;
|
u64 shr = GITS_BASER_InnerShareable;
|
||||||
u64 cache = GITS_BASER_WaWb;
|
u64 cache;
|
||||||
u64 typer = readq_relaxed(its->base + GITS_TYPER);
|
u64 typer;
|
||||||
u32 ids = GITS_TYPER_DEVBITS(typer);
|
u32 ids;
|
||||||
|
|
||||||
|
if (its->flags & ITS_FLAGS_WORKAROUND_CAVIUM_22375) {
|
||||||
|
/*
|
||||||
|
* erratum 22375: only alloc 8MB table size
|
||||||
|
* erratum 24313: ignore memory access type
|
||||||
|
*/
|
||||||
|
cache = 0;
|
||||||
|
ids = 0x14; /* 20 bits, 8MB */
|
||||||
|
} else {
|
||||||
|
cache = GITS_BASER_WaWb;
|
||||||
|
typer = readq_relaxed(its->base + GITS_TYPER);
|
||||||
|
ids = GITS_TYPER_DEVBITS(typer);
|
||||||
|
}
|
||||||
|
|
||||||
for (i = 0; i < GITS_BASER_NR_REGS; i++) {
|
for (i = 0; i < GITS_BASER_NR_REGS; i++) {
|
||||||
u64 val = readq_relaxed(its->base + GITS_BASER + i * 8);
|
u64 val = readq_relaxed(its->base + GITS_BASER + i * 8);
|
||||||
|
@ -1377,7 +1391,22 @@ static int its_force_quiescent(void __iomem *base)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
|
static void __maybe_unused its_enable_quirk_cavium_22375(void *data)
|
||||||
|
{
|
||||||
|
struct its_node *its = data;
|
||||||
|
|
||||||
|
its->flags |= ITS_FLAGS_WORKAROUND_CAVIUM_22375;
|
||||||
|
}
|
||||||
|
|
||||||
static const struct gic_quirk its_quirks[] = {
|
static const struct gic_quirk its_quirks[] = {
|
||||||
|
#ifdef CONFIG_CAVIUM_ERRATUM_22375
|
||||||
|
{
|
||||||
|
.desc = "ITS: Cavium errata 22375, 24313",
|
||||||
|
.iidr = 0xa100034c, /* ThunderX pass 1.x */
|
||||||
|
.mask = 0xffff0fff,
|
||||||
|
.init = its_enable_quirk_cavium_22375,
|
||||||
|
},
|
||||||
|
#endif
|
||||||
{
|
{
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
Loading…
Reference in a new issue