From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- arch/mips/bcm63xx/dev-usb-usbd.c | 65 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 arch/mips/bcm63xx/dev-usb-usbd.c (limited to 'arch/mips/bcm63xx/dev-usb-usbd.c') diff --git a/arch/mips/bcm63xx/dev-usb-usbd.c b/arch/mips/bcm63xx/dev-usb-usbd.c new file mode 100644 index 000000000..508bd9d8d --- /dev/null +++ b/arch/mips/bcm63xx/dev-usb-usbd.c @@ -0,0 +1,65 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Copyright (C) 2008 Maxime Bizon + * Copyright (C) 2012 Kevin Cernekee + * Copyright (C) 2012 Broadcom Corporation + */ + +#include +#include +#include +#include +#include +#include + +#define NUM_MMIO 2 +#define NUM_IRQ 7 + +static struct resource usbd_resources[NUM_MMIO + NUM_IRQ]; + +static u64 usbd_dmamask = DMA_BIT_MASK(32); + +static struct platform_device bcm63xx_usbd_device = { + .name = "bcm63xx_udc", + .id = -1, + .num_resources = ARRAY_SIZE(usbd_resources), + .resource = usbd_resources, + .dev = { + .dma_mask = &usbd_dmamask, + .coherent_dma_mask = DMA_BIT_MASK(32), + }, +}; + +int __init bcm63xx_usbd_register(const struct bcm63xx_usbd_platform_data *pd) +{ + const int irq_list[NUM_IRQ] = { IRQ_USBD, + IRQ_USBD_RXDMA0, IRQ_USBD_TXDMA0, + IRQ_USBD_RXDMA1, IRQ_USBD_TXDMA1, + IRQ_USBD_RXDMA2, IRQ_USBD_TXDMA2 }; + int i; + + if (!BCMCPU_IS_6328() && !BCMCPU_IS_6368()) + return 0; + + usbd_resources[0].start = bcm63xx_regset_address(RSET_USBD); + usbd_resources[0].end = usbd_resources[0].start + RSET_USBD_SIZE - 1; + usbd_resources[0].flags = IORESOURCE_MEM; + + usbd_resources[1].start = bcm63xx_regset_address(RSET_USBDMA); + usbd_resources[1].end = usbd_resources[1].start + RSET_USBDMA_SIZE - 1; + usbd_resources[1].flags = IORESOURCE_MEM; + + for (i = 0; i < NUM_IRQ; i++) { + struct resource *r = &usbd_resources[NUM_MMIO + i]; + + r->start = r->end = bcm63xx_get_irq_number(irq_list[i]); + r->flags = IORESOURCE_IRQ; + } + + platform_device_add_data(&bcm63xx_usbd_device, pd, sizeof(*pd)); + + return platform_device_register(&bcm63xx_usbd_device); +} -- cgit v1.3.1