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| author | Cédric Le Goater <clg@kaod.org> | 2021-04-13 15:03:52 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-04-17 10:40:51 +1000 |
| commit | e9e16917bc388846163b8566a298a291d71e44c9 (patch) | |
| tree | 76d570b6aa17f0579c6076cb9d314e51f3919fcb /arch/powerpc/sysdev/xive | |
| parent | 38d0b1c9cec71e6d0f3bddef0bbce41d05a3e796 (diff) | |
| download | linux-e9e16917bc388846163b8566a298a291d71e44c9.tar.bz2 | |
powerpc/xive: Use the "ibm, chip-id" property only under PowerNV
The 'chip_id' field of the XIVE CPU structure is used to choose a
target for a source located on the same chip. For that, the XIVE
driver queries the chip identifier from the "ibm,chip-id" property
and compares it to a 'src_chip' field identifying the chip of a
source. This information is only available on the PowerNV platform,
'src_chip' being assigned to XIVE_INVALID_CHIP_ID under pSeries.
The "ibm,chip-id" property is also not available on all platforms. It
was first introduced on PowerNV and later, under QEMU for pSeries/KVM.
However, the property is not part of PAPR and does not exist under
pSeries/PowerVM.
Assign 'chip_id' to XIVE_INVALID_CHIP_ID by default and let the
PowerNV platform override the value with the "ibm,chip-id" property.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210413130352.1183267-1-clg@kaod.org
Diffstat (limited to 'arch/powerpc/sysdev/xive')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 9 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/native.c | 6 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/xive-internal.h | 1 |
3 files changed, 10 insertions, 6 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index b025f42bf1f3..50469700dec6 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -1413,17 +1413,14 @@ static int xive_prepare_cpu(unsigned int cpu) xc = per_cpu(xive_cpu, cpu); if (!xc) { - struct device_node *np; - xc = kzalloc_node(sizeof(struct xive_cpu), GFP_KERNEL, cpu_to_node(cpu)); if (!xc) return -ENOMEM; - np = of_get_cpu_node(cpu, NULL); - if (np) - xc->chip_id = of_get_ibm_chip_id(np); - of_node_put(np); xc->hw_ipi = XIVE_BAD_IRQ; + xc->chip_id = XIVE_INVALID_CHIP_ID; + if (xive_ops->prepare_cpu) + xive_ops->prepare_cpu(cpu, xc); per_cpu(xive_cpu, cpu) = xc; } diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c index 05a800a3104e..57e3f1540435 100644 --- a/arch/powerpc/sysdev/xive/native.c +++ b/arch/powerpc/sysdev/xive/native.c @@ -380,6 +380,11 @@ static void xive_native_update_pending(struct xive_cpu *xc) } } +static void xive_native_prepare_cpu(unsigned int cpu, struct xive_cpu *xc) +{ + xc->chip_id = cpu_to_chip_id(cpu); +} + static void xive_native_setup_cpu(unsigned int cpu, struct xive_cpu *xc) { s64 rc; @@ -462,6 +467,7 @@ static const struct xive_ops xive_native_ops = { .match = xive_native_match, .shutdown = xive_native_shutdown, .update_pending = xive_native_update_pending, + .prepare_cpu = xive_native_prepare_cpu, .setup_cpu = xive_native_setup_cpu, .teardown_cpu = xive_native_teardown_cpu, .sync_source = xive_native_sync_source, diff --git a/arch/powerpc/sysdev/xive/xive-internal.h b/arch/powerpc/sysdev/xive/xive-internal.h index b3a456fdd3a5..504e7edce358 100644 --- a/arch/powerpc/sysdev/xive/xive-internal.h +++ b/arch/powerpc/sysdev/xive/xive-internal.h @@ -44,6 +44,7 @@ struct xive_ops { u32 *sw_irq); int (*setup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio); void (*cleanup_queue)(unsigned int cpu, struct xive_cpu *xc, u8 prio); + void (*prepare_cpu)(unsigned int cpu, struct xive_cpu *xc); void (*setup_cpu)(unsigned int cpu, struct xive_cpu *xc); void (*teardown_cpu)(unsigned int cpu, struct xive_cpu *xc); bool (*match)(struct device_node *np); |