[PATCH AUTOSEL 5.11 076/104] powerpc/xive: Use the "ibm, chip-id" property only under PowerNV
From: Sasha Levin <sashal@kernel.org>
Date: 2021-05-05 16:52:58
Also in:
linuxppc-dev, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Cédric Le Goater <clg@kaod.org> [ Upstream commit e9e16917bc388846163b8566a298a291d71e44c9 ] 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 (local) Signed-off-by: Sasha Levin <sashal@kernel.org> --- arch/powerpc/sysdev/xive/common.c | 9 +++------ arch/powerpc/sysdev/xive/native.c | 6 ++++++ 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 595310e056f4..e897c3bab371 100644
--- a/arch/powerpc/sysdev/xive/common.c
+++ b/arch/powerpc/sysdev/xive/common.c@@ -1335,17 +1335,14 @@ 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 9cf57c722faa..6478be19b4d3 100644
--- a/arch/powerpc/sysdev/xive/xive-internal.h
+++ b/arch/powerpc/sysdev/xive/xive-internal.h@@ -46,6 +46,7 @@ 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);
--
2.30.2