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amd-iommu: implement suspend/resume 

This patch puts everything together and enables suspend/resume support
in the AMD IOMMU driver.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-05-12 09:56:12 +02:00
parent 05f92db9f4
commit 736501ee00
1 changed files with 20 additions and 1 deletions
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21
arch/x86/kernel/amd_iommu_init.c
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@ -965,12 +965,31 @@ static void disable_iommus(void)
static int amd_iommu_resume(struct sys_device *dev)
{
/*
* Disable IOMMUs before reprogramming the hardware registers.
* IOMMU is still enabled from the resume kernel.
*/
disable_iommus();
/* re-load the hardware */
enable_iommus();
/*
* we have to flush after the IOMMUs are enabled because a
* disabled IOMMU will never execute the commands we send
*/
amd_iommu_flush_all_domains();
amd_iommu_flush_all_devices();
return 0;
}
static int amd_iommu_suspend(struct sys_device *dev, pm_message_t state)
{
return -EINVAL;
/* disable IOMMUs to go out of the way for BIOS */
disable_iommus();
return 0;
}
static struct sysdev_class amd_iommu_sysdev_class = {