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| author | Cédric Le Goater | 2017-08-30 21:46:10 +0200 |
|---|---|---|
| committer | Michael Ellerman | 2017-09-02 13:02:34 +0200 |
| commit | 994ea2f41999113d84c317da3ec1e10aa6469b3f (patch) | |
| tree | 0564f84d38bc0d59ca14ddc02bb6c22c04bc9a43 /arch/powerpc/sysdev/xive | |
| parent | powerpc/sstep: Avoid used uninitialized error (diff) | |
| download | kernel-qcow2-linux-994ea2f41999113d84c317da3ec1e10aa6469b3f.tar.gz kernel-qcow2-linux-994ea2f41999113d84c317da3ec1e10aa6469b3f.tar.xz kernel-qcow2-linux-994ea2f41999113d84c317da3ec1e10aa6469b3f.zip | |
powerpc/xive: introduce a common routine xive_queue_page_alloc()
This routine will be used in the spapr backend. Also introduce a short
xive_alloc_order() helper.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/sysdev/xive')
| -rw-r--r-- | arch/powerpc/sysdev/xive/common.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/native.c | 16 | ||||
| -rw-r--r-- | arch/powerpc/sysdev/xive/xive-internal.h | 6 |
3 files changed, 27 insertions, 11 deletions
diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 558df6542b1a..a30d6d12b92b 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -1428,6 +1428,22 @@ bool __init xive_core_init(const struct xive_ops *ops, void __iomem *area, u32 o return true; } +__be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift) +{ + unsigned int alloc_order; + struct page *pages; + __be32 *qpage; + + alloc_order = xive_alloc_order(queue_shift); + pages = alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL, alloc_order); + if (!pages) + return ERR_PTR(-ENOMEM); + qpage = (__be32 *)page_address(pages); + memset(qpage, 0, 1 << queue_shift); + + return qpage; +} + static int __init xive_off(char *arg) { xive_cmdline_disabled = true; diff --git a/arch/powerpc/sysdev/xive/native.c b/arch/powerpc/sysdev/xive/native.c index edc2e81b7280..ace3d7aedfb7 100644 --- a/arch/powerpc/sysdev/xive/native.c +++ b/arch/powerpc/sysdev/xive/native.c @@ -202,17 +202,12 @@ EXPORT_SYMBOL_GPL(xive_native_disable_queue); static int xive_native_setup_queue(unsigned int cpu, struct xive_cpu *xc, u8 prio) { struct xive_q *q = &xc->queue[prio]; - unsigned int alloc_order; - struct page *pages; __be32 *qpage; - alloc_order = (xive_queue_shift > PAGE_SHIFT) ? - (xive_queue_shift - PAGE_SHIFT) : 0; - pages = alloc_pages_node(cpu_to_node(cpu), GFP_KERNEL, alloc_order); - if (!pages) - return -ENOMEM; - qpage = (__be32 *)page_address(pages); - memset(qpage, 0, 1 << xive_queue_shift); + qpage = xive_queue_page_alloc(cpu, xive_queue_shift); + if (IS_ERR(qpage)) + return PTR_ERR(qpage); + return xive_native_configure_queue(get_hard_smp_processor_id(cpu), q, prio, qpage, xive_queue_shift, false); } @@ -227,8 +222,7 @@ static void xive_native_cleanup_queue(unsigned int cpu, struct xive_cpu *xc, u8 * from an IPI and iounmap isn't safe */ __xive_native_disable_queue(get_hard_smp_processor_id(cpu), q, prio); - alloc_order = (xive_queue_shift > PAGE_SHIFT) ? - (xive_queue_shift - PAGE_SHIFT) : 0; + alloc_order = xive_alloc_order(xive_queue_shift); free_pages((unsigned long)q->qpage, alloc_order); q->qpage = NULL; } diff --git a/arch/powerpc/sysdev/xive/xive-internal.h b/arch/powerpc/sysdev/xive/xive-internal.h index d07ef2d29caf..dd1e2022cce4 100644 --- a/arch/powerpc/sysdev/xive/xive-internal.h +++ b/arch/powerpc/sysdev/xive/xive-internal.h @@ -56,6 +56,12 @@ struct xive_ops { bool xive_core_init(const struct xive_ops *ops, void __iomem *area, u32 offset, u8 max_prio); +__be32 *xive_queue_page_alloc(unsigned int cpu, u32 queue_shift); + +static inline u32 xive_alloc_order(u32 queue_shift) +{ + return (queue_shift > PAGE_SHIFT) ? (queue_shift - PAGE_SHIFT) : 0; +} extern bool xive_cmdline_disabled; |