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Commit eac9fbc6 authored by Richard Kennedy's avatar Richard Kennedy Committed by Joerg Roedel
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AMD IOMMU: struct amd_iommu remove padding on 64 bit 



Remove 16 bytes of padding from struct amd_iommu on 64bit builds
reducing its size to 120 bytes, allowing it to span one fewer
cachelines.

Signed-off-by: default avatarRichard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
parent 061e41fd

arch/x86/include/asm/amd_iommu_types.h

+12 −12
Original line number Diff line number Diff line
@@ -251,13 +251,6 @@ struct amd_iommu { 
	/* Pointer to PCI device of this IOMMU */

	struct pci_dev *dev;



	/*

	 * Capability pointer. There could be more than one IOMMU per PCI

	 * device function if there are more than one AMD IOMMU capability

	 * pointers.

	 */

	u16 cap_ptr;



	/* physical address of MMIO space */

	u64 mmio_phys;

	/* virtual address of MMIO space */
@@ -266,6 +259,13 @@ struct amd_iommu { 
	/* capabilities of that IOMMU read from ACPI */

	u32 cap;



	/*

	 * Capability pointer. There could be more than one IOMMU per PCI

	 * device function if there are more than one AMD IOMMU capability

	 * pointers.

	 */

	u16 cap_ptr;



	/* pci domain of this IOMMU */

	u16 pci_seg;
@@ -284,19 +284,19 @@ struct amd_iommu { 
	/* size of command buffer */

	u32 cmd_buf_size;



	/* event buffer virtual address */

	u8 *evt_buf;

	/* size of event buffer */

	u32 evt_buf_size;

	/* event buffer virtual address */

	u8 *evt_buf;

	/* MSI number for event interrupt */

	u16 evt_msi_num;



	/* if one, we need to send a completion wait command */

	int need_sync;



	/* true if interrupts for this IOMMU are already enabled */

	bool int_enabled;



	/* if one, we need to send a completion wait command */

	int need_sync;



	/* default dma_ops domain for that IOMMU */

	struct dma_ops_domain *default_dom;

};