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x86, msi: Introduce x86_msi.compose_msi_msg call-back

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This call-back points to the right function for initializing
the msi_msg structure. The old code for msi_msg generation
was split up into the irq-remapped and the default case.

The irq-remapped case just calls into the specific Intel or
AMD implementation when the device is behind an IOMMU.
Otherwise the default function is called.

Signed-off-by: Joerg Roedel <joro@8bytes.org>
Acked-by: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Joerg Roedel
2012-09-26 12:44:49 +02:00
parent 2976fd8417
commit 7601384f91
5 changed files with 46 additions and 31 deletions
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arch/x86/kernel/x86_init.c
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@@ -113,6 +113,7 @@ struct x86_platform_ops x86_platform = {
EXPORT_SYMBOL_GPL(x86_platform);
struct x86_msi_ops x86_msi = {
.setup_msi_irqs = native_setup_msi_irqs,
.compose_msi_msg = native_compose_msi_msg,
.teardown_msi_irq = native_teardown_msi_irq,
.teardown_msi_irqs = default_teardown_msi_irqs,
.restore_msi_irqs = default_restore_msi_irqs,