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| author | Zhenzhong Duan <zhenzhong.duan@oracle.com> | 2014-05-07 13:41:48 +0000 |
|---|---|---|
| committer | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2014-05-07 16:14:41 +0000 |
| commit | c976437c7dba9c7444fb41df45468968aaa326ad (patch) | |
| tree | 7702267d658e721ce56838d8c3b216ffd65b40a4 /hw/xen/xen_pt_msi.c | |
| parent | fe680d0dac85e0f2d6c3b53838c250f6e0b1f49b (diff) | |
| download | focaccia-qemu-c976437c7dba9c7444fb41df45468968aaa326ad.tar.gz focaccia-qemu-c976437c7dba9c7444fb41df45468968aaa326ad.zip | |
qemu-xen: free all the pirqs for msi/msix when driver unload
Pirqs are not freed when driver unload, then new pirqs are allocated when driver reload. This could exhaust pirqs if do it in a loop. This patch fixes the bug by freeing pirqs when ENABLE bit is cleared in msi/msix control reg. There is also other way of fixing it such as reuse pirqs between driver reload, but this way is better. Xen-devel: http://marc.info/?l=xen-devel&m=136800120304275&w=2 Signed-off-by: Zhenzhong Duan <zhenzhong.duan@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'hw/xen/xen_pt_msi.c')
| -rw-r--r-- | hw/xen/xen_pt_msi.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/hw/xen/xen_pt_msi.c b/hw/xen/xen_pt_msi.c index 6fbe0cc86b..12b4c4560c 100644 --- a/hw/xen/xen_pt_msi.c +++ b/hw/xen/xen_pt_msi.c @@ -282,7 +282,8 @@ void xen_pt_msi_disable(XenPCIPassthroughState *s) msi->initialized); /* clear msi info */ - msi->flags = 0; + msi->flags &= ~PCI_MSI_FLAGS_ENABLE; + msi->initialized = false; msi->mapped = false; msi->pirq = XEN_PT_UNASSIGNED_PIRQ; } @@ -446,7 +447,8 @@ static void pci_msix_write(void *opaque, hwaddr addr, if (offset != PCI_MSIX_ENTRY_VECTOR_CTRL) { const volatile uint32_t *vec_ctrl; - if (get_entry_value(entry, offset) == val) { + if (get_entry_value(entry, offset) == val + && entry->pirq != XEN_PT_UNASSIGNED_PIRQ) { return; } |