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Commit 945b4ac4 authored by Joerg Roedel's avatar Joerg Roedel
Browse files

x86/amd-iommu: Dump illegal command on ILLEGAL_COMMAND_ERROR 



This patch adds code to dump the command which caused an
ILLEGAL_COMMAND_ERROR raised by the IOMMU hardware.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent e3e59876

arch/x86/kernel/amd_iommu.c

+10 −0
Original line number Diff line number Diff line
@@ -147,6 +147,15 @@ static void dump_dte_entry(u16 devid) 
			amd_iommu_dev_table[devid].data[i]);

}



static void dump_command(unsigned long phys_addr)

{

	struct iommu_cmd *cmd = phys_to_virt(phys_addr);

	int i;



	for (i = 0; i < 4; ++i)

		pr_err("AMD-Vi: CMD[%d]: %08x\n", i, cmd->data[i]);

}



static void iommu_print_event(void *__evt)

{

	u32 *event = __evt;
@@ -186,6 +195,7 @@ static void iommu_print_event(void *__evt) 
		break;

	case EVENT_TYPE_ILL_CMD:

		printk("ILLEGAL_COMMAND_ERROR address=0x%016llx]\n", address);

		dump_command(address);

		break;

	case EVENT_TYPE_CMD_HARD_ERR:

		printk("COMMAND_HARDWARE_ERROR address=0x%016llx "