cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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platform.c (1738B)

      1// SPDX-License-Identifier: GPL-2.0
      2
      3#include <linux/platform_device.h>
      4#include <linux/interrupt.h>
      5#include <linux/memblock.h>
      6#include <asm/virt.h>
      7#include <asm/irq.h>
      8
      9#define VIRTIO_BUS_NB	128
     10
     11static int __init virt_virtio_init(unsigned int id)
     12{
     13	const struct resource res[] = {
     14		DEFINE_RES_MEM(virt_bi_data.virtio.mmio + id * 0x200, 0x200),
     15		DEFINE_RES_IRQ(virt_bi_data.virtio.irq + id),
     16	};
     17	struct platform_device *pdev;
     18
     19	pdev = platform_device_register_simple("virtio-mmio", id,
     20					       res, ARRAY_SIZE(res));
     21	if (IS_ERR(pdev))
     22		return PTR_ERR(pdev);
     23
     24	return 0;
     25}
     26
     27static int __init virt_platform_init(void)
     28{
     29	const struct resource goldfish_tty_res[] = {
     30		DEFINE_RES_MEM(virt_bi_data.tty.mmio, 1),
     31		DEFINE_RES_IRQ(virt_bi_data.tty.irq),
     32	};
     33	/* this is the second gf-rtc, the first one is used by the scheduler */
     34	const struct resource goldfish_rtc_res[] = {
     35		DEFINE_RES_MEM(virt_bi_data.rtc.mmio + 0x1000, 0x1000),
     36		DEFINE_RES_IRQ(virt_bi_data.rtc.irq + 1),
     37	};
     38	struct platform_device *pdev;
     39	unsigned int i;
     40
     41	if (!MACH_IS_VIRT)
     42		return -ENODEV;
     43
     44	/* We need this to have DMA'able memory provided to goldfish-tty */
     45	min_low_pfn = 0;
     46
     47	pdev = platform_device_register_simple("goldfish_tty",
     48					       PLATFORM_DEVID_NONE,
     49					       goldfish_tty_res,
     50					       ARRAY_SIZE(goldfish_tty_res));
     51	if (IS_ERR(pdev))
     52		return PTR_ERR(pdev);
     53
     54	pdev = platform_device_register_simple("goldfish_rtc",
     55					       PLATFORM_DEVID_NONE,
     56					       goldfish_rtc_res,
     57					       ARRAY_SIZE(goldfish_rtc_res));
     58	if (IS_ERR(pdev))
     59		return PTR_ERR(pdev);
     60
     61	for (i = 0; i < VIRTIO_BUS_NB; i++) {
     62		int err;
     63
     64		err = virt_virtio_init(i);
     65		if (err)
     66			return err;
     67	}
     68
     69	return 0;
     70}
     71
     72arch_initcall(virt_platform_init);