[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 10/10] xen/swiotlb: Depending on after_bootmem is not correct.
> > start_dma_addr = xen_virt_to_bus(xen_io_tlb_start); > > - if (!after_bootmem) > > + rc = 0; > ^ > why does this change belong to this patch? > > I took that out of the this patch, so it is now: >From c5bc5502abc0f70b682c0f2a70d08e6319825163 Mon Sep 17 00:00:00 2001 From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> Date: Wed, 5 Sep 2012 13:35:47 -0400 Subject: [PATCH 1/2] xen/swiotlb: Depending on after_bootmem is not correct. When PCI IOMMUs are initialized it is after after_bootmem but before a lot of "other" subsystems are initialized. As such the check for after_bootmem is incorrect and we should just use a parameter to define whether we are early or late. This solves this bootup problem: __ex_table already sorted, skipping sortM Initializing CPU#0 Warning: only able to allocate 1 MB for software IO TLB Xen-SWIOTLB: Lowering to 2MB Warning: only able to allocate 1 MB for software IO TLB Xen-SWIOTLB: Lowering to 2MB Warning: only able to allocate 1 MB for software IO TLB Xen-SWIOTLB: Lowering to 2MB Warning: only able to allocate 1 MB for software IO TLB Cannot allocate Xen-SWIOTLB buffer (rc:-12) [v1: Had rc=0 in it by mistake] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> --- arch/x86/xen/pci-swiotlb-xen.c | 4 ++-- drivers/xen/swiotlb-xen.c | 10 +++++----- include/xen/swiotlb-xen.h | 2 +- 3 files changed, 8 insertions(+), 8 deletions(-) diff --git a/arch/x86/xen/pci-swiotlb-xen.c b/arch/x86/xen/pci-swiotlb-xen.c index fc0c78f..1608244 100644 --- a/arch/x86/xen/pci-swiotlb-xen.c +++ b/arch/x86/xen/pci-swiotlb-xen.c @@ -69,7 +69,7 @@ int __init pci_xen_swiotlb_detect(void) void __init pci_xen_swiotlb_init(void) { if (xen_swiotlb) { - xen_swiotlb_init(1); + xen_swiotlb_init(1, true /* early */); dma_ops = &xen_swiotlb_dma_ops; /* Make sure ACS will be enabled */ @@ -84,7 +84,7 @@ int pci_xen_swiotlb_init_late(void) if (xen_swiotlb) return 0; - rc = xen_swiotlb_init(1); + rc = xen_swiotlb_init(1, false /* late */); if (rc) return rc; diff --git a/drivers/xen/swiotlb-xen.c b/drivers/xen/swiotlb-xen.c index 6f81994..02a52f3 100644 --- a/drivers/xen/swiotlb-xen.c +++ b/drivers/xen/swiotlb-xen.c @@ -176,7 +176,7 @@ static const char *xen_swiotlb_error(enum xen_swiotlb_err err) } return ""; } -int __ref xen_swiotlb_init(int verbose) +int __ref xen_swiotlb_init(int verbose, bool early) { unsigned long bytes, order; int rc = -ENOMEM; @@ -190,7 +190,7 @@ retry: /* * Get IO TLB memory from any location. */ - if (!after_bootmem) + if (early) xen_io_tlb_start = alloc_bootmem_pages(PAGE_ALIGN(bytes)); else { #define SLABS_PER_PAGE (1 << (PAGE_SHIFT - IO_TLB_SHIFT)) @@ -220,7 +220,7 @@ retry: bytes, xen_io_tlb_nslabs); if (rc) { - if (!after_bootmem) + if (early) free_bootmem(__pa(xen_io_tlb_start), PAGE_ALIGN(bytes)); else { free_pages((unsigned long)xen_io_tlb_start, order); @@ -230,7 +230,7 @@ retry: goto error; } start_dma_addr = xen_virt_to_bus(xen_io_tlb_start); - if (!after_bootmem) + if (early) swiotlb_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs, verbose); else rc = swiotlb_late_init_with_tbl(xen_io_tlb_start, xen_io_tlb_nslabs); @@ -244,7 +244,7 @@ error: goto retry; } pr_err("%s (rc:%d)", xen_swiotlb_error(m_ret), rc); - if (!after_bootmem) + if (early) panic("%s (rc:%d)", xen_swiotlb_error(m_ret), rc); else free_pages((unsigned long)xen_io_tlb_start, order); diff --git a/include/xen/swiotlb-xen.h b/include/xen/swiotlb-xen.h index a0db2b7..de8bcc6 100644 --- a/include/xen/swiotlb-xen.h +++ b/include/xen/swiotlb-xen.h @@ -3,7 +3,7 @@ #include <linux/swiotlb.h> -extern int xen_swiotlb_init(int verbose); +extern int xen_swiotlb_init(int verbose, bool early); extern void *xen_swiotlb_alloc_coherent(struct device *hwdev, size_t size, -- 1.7.7.6 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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