Merge tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - Support for optimized routines based on the host CPU

 - Support for PCI via virtio

 - Various fixes

* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: remove unneeded semicolon in um_arch.c
  um: Remove the repeated declaration
  um: fix error return code in winch_tramp()
  um: fix error return code in slip_open()
  um: Fix stack pointer alignment
  um: implement flush_cache_vmap/flush_cache_vunmap
  um: add a UML specific futex implementation
  um: enable the use of optimized xor routines in UML
  um: Add support for host CPU flags and alignment
  um: allow not setting extra rpaths in the linux binary
  um: virtio/pci: enable suspend/resume
  um: add PCI over virtio emulation driver
  um: irqs: allow invoking time-travel handler multiple times
  um: time-travel/signals: fix ndelay() in interrupt
  um: expose time-travel mode to userspace side
  um: export signals_enabled directly
  um: remove unused smp_sigio_handler() declaration
  lib: add iomem emulation (logic_iomem)
  um: allow disabling NO_IOMEM

3 files changed, 204 insertions, 0 deletions

diff --git a/include/asm-generic/logic_io.h b/include/asm-generic/logic_io.h
new file mode 100644
index 000000000000..a53116b8c57e
--- /dev/null
+++ b/include/asm-generic/logic_io.h
@@ -0,0 +1,78 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Intel Corporation
+ * Author: johannes@sipsolutions.net
+ */
+#ifndef _LOGIC_IO_H
+#define _LOGIC_IO_H
+#include <linux/types.h>
+
+/* include this file into asm/io.h */
+
+#ifdef CONFIG_INDIRECT_IOMEM
+
+#ifdef CONFIG_INDIRECT_IOMEM_FALLBACK
+/*
+ * If you want emulated IO memory to fall back to 'normal' IO memory
+ * if a region wasn't registered as emulated, then you need to have
+ * all of the real_* functions implemented.
+ */
+#if !defined(real_ioremap) || !defined(real_iounmap) || \
+    !defined(real_raw_readb) || !defined(real_raw_writeb) || \
+    !defined(real_raw_readw) || !defined(real_raw_writew) || \
+    !defined(real_raw_readl) || !defined(real_raw_writel) || \
+    (defined(CONFIG_64BIT) && \
+     (!defined(real_raw_readq) || !defined(real_raw_writeq))) || \
+    !defined(real_memset_io) || \
+    !defined(real_memcpy_fromio) || \
+    !defined(real_memcpy_toio)
+#error "Must provide fallbacks for real IO memory access"
+#endif /* defined ... */
+#endif /* CONFIG_INDIRECT_IOMEM_FALLBACK */
+
+#define ioremap ioremap
+void __iomem *ioremap(phys_addr_t offset, size_t size);
+
+#define iounmap iounmap
+void iounmap(void __iomem *addr);
+
+#define __raw_readb __raw_readb
+u8 __raw_readb(const volatile void __iomem *addr);
+
+#define __raw_readw __raw_readw
+u16 __raw_readw(const volatile void __iomem *addr);
+
+#define __raw_readl __raw_readl
+u32 __raw_readl(const volatile void __iomem *addr);
+
+#ifdef CONFIG_64BIT
+#define __raw_readq __raw_readq
+u64 __raw_readq(const volatile void __iomem *addr);
+#endif /* CONFIG_64BIT */
+
+#define __raw_writeb __raw_writeb
+void __raw_writeb(u8 value, volatile void __iomem *addr);
+
+#define __raw_writew __raw_writew
+void __raw_writew(u16 value, volatile void __iomem *addr);
+
+#define __raw_writel __raw_writel
+void __raw_writel(u32 value, volatile void __iomem *addr);
+
+#ifdef CONFIG_64BIT
+#define __raw_writeq __raw_writeq
+void __raw_writeq(u64 value, volatile void __iomem *addr);
+#endif /* CONFIG_64BIT */
+
+#define memset_io memset_io
+void memset_io(volatile void __iomem *addr, int value, size_t size);
+
+#define memcpy_fromio memcpy_fromio
+void memcpy_fromio(void *buffer, const volatile void __iomem *addr,
+		   size_t size);
+
+#define memcpy_toio memcpy_toio
+void memcpy_toio(volatile void __iomem *addr, const void *buffer, size_t size);
+
+#endif /* CONFIG_INDIRECT_IOMEM */
+#endif /* _LOGIC_IO_H */
diff --git a/include/linux/logic_iomem.h b/include/linux/logic_iomem.h
new file mode 100644
index 000000000000..3fa65c964379
--- /dev/null
+++ b/include/linux/logic_iomem.h
@@ -0,0 +1,62 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2021 Intel Corporation
+ * Author: johannes@sipsolutions.net
+ */
+#ifndef __LOGIC_IOMEM_H
+#define __LOGIC_IOMEM_H
+#include <linux/types.h>
+#include <linux/ioport.h>
+
+/**
+ * struct logic_iomem_ops - emulated IO memory ops
+ * @read: read an 8, 16, 32 or 64 bit quantity from the given offset,
+ *	size is given in bytes (1, 2, 4 or 8)
+ *	(64-bit only necessary if CONFIG_64BIT is set)
+ * @write: write an 8, 16 32 or 64 bit quantity to the given offset,
+ *	size is given in bytes (1, 2, 4 or 8)
+ *	(64-bit only necessary if CONFIG_64BIT is set)
+ * @set: optional, for memset_io()
+ * @copy_from: optional, for memcpy_fromio()
+ * @copy_to: optional, for memcpy_toio()
+ * @unmap: optional, this region is getting unmapped
+ */
+struct logic_iomem_ops {
+	unsigned long (*read)(void *priv, unsigned int offset, int size);
+	void (*write)(void *priv, unsigned int offset, int size,
+		      unsigned long val);
+
+	void (*set)(void *priv, unsigned int offset, u8 value, int size);
+	void (*copy_from)(void *priv, void *buffer, unsigned int offset,
+			  int size);
+	void (*copy_to)(void *priv, unsigned int offset, const void *buffer,
+			int size);
+
+	void (*unmap)(void *priv);
+};
+
+/**
+ * struct logic_iomem_region_ops - ops for an IO memory handler
+ * @map: map a range in the registered IO memory region, must
+ *	fill *ops with the ops and may fill *priv to be passed
+ *	to the ops. The offset is given as the offset into the
+ *	registered resource region.
+ *	The return value is negative for errors, or >= 0 for
+ *	success. On success, the return value is added to the
+ *	offset for later ops, to allow for partial mappings.
+ */
+struct logic_iomem_region_ops {
+	long (*map)(unsigned long offset, size_t size,
+		    const struct logic_iomem_ops **ops,
+		    void **priv);
+};
+
+/**
+ * logic_iomem_add_region - register an IO memory region
+ * @resource: the resource description for this region
+ * @ops: the IO memory mapping ops for this resource
+ */
+int logic_iomem_add_region(struct resource *resource,
+			   const struct logic_iomem_region_ops *ops);
+
+#endif /* __LOGIC_IOMEM_H */
diff --git a/include/uapi/linux/virtio_pcidev.h b/include/uapi/linux/virtio_pcidev.h
new file mode 100644
index 000000000000..89daa88bcfef
--- /dev/null
+++ b/include/uapi/linux/virtio_pcidev.h
@@ -0,0 +1,64 @@
+/* SPDX-License-Identifier: ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) */
+/*
+ * Copyright (C) 2021 Intel Corporation
+ * Author: Johannes Berg <johannes@sipsolutions.net>
+ */
+#ifndef _UAPI_LINUX_VIRTIO_PCIDEV_H
+#define _UAPI_LINUX_VIRTIO_PCIDEV_H
+#include <linux/types.h>
+
+/**
+ * enum virtio_pcidev_ops - virtual PCI device operations
+ * @VIRTIO_PCIDEV_OP_CFG_READ: read config space, size is 1, 2, 4 or 8;
+ *	the @data field should be filled in by the device (in little endian).
+ * @VIRTIO_PCIDEV_OP_CFG_WRITE: write config space, size is 1, 2, 4 or 8;
+ *	the @data field contains the data to write (in little endian).
+ * @VIRTIO_PCIDEV_OP_BAR_READ: read BAR mem/pio, size can be variable;
+ *	the @data field should be filled in by the device (in little endian).
+ * @VIRTIO_PCIDEV_OP_BAR_WRITE: write BAR mem/pio, size can be variable;
+ *	the @data field contains the data to write (in little endian).
+ * @VIRTIO_PCIDEV_OP_MMIO_MEMSET: memset MMIO, size is variable but
+ *	the @data field only has one byte (unlike @VIRTIO_PCIDEV_OP_MMIO_WRITE)
+ * @VIRTIO_PCIDEV_OP_INT: legacy INTx# pin interrupt, the addr field is 1-4 for
+ *	the number
+ * @VIRTIO_PCIDEV_OP_MSI: MSI(-X) interrupt, this message basically transports
+ *	the 16- or 32-bit write that would otherwise be done into memory,
+ *	analogous to the write messages (@VIRTIO_PCIDEV_OP_MMIO_WRITE) above
+ * @VIRTIO_PCIDEV_OP_PME: Dummy message whose content is ignored (and should be
+ *	all zeroes) to signal the PME# pin.
+ */
+enum virtio_pcidev_ops {
+	VIRTIO_PCIDEV_OP_RESERVED = 0,
+	VIRTIO_PCIDEV_OP_CFG_READ,
+	VIRTIO_PCIDEV_OP_CFG_WRITE,
+	VIRTIO_PCIDEV_OP_MMIO_READ,
+	VIRTIO_PCIDEV_OP_MMIO_WRITE,
+	VIRTIO_PCIDEV_OP_MMIO_MEMSET,
+	VIRTIO_PCIDEV_OP_INT,
+	VIRTIO_PCIDEV_OP_MSI,
+	VIRTIO_PCIDEV_OP_PME,
+};
+
+/**
+ * struct virtio_pcidev_msg - virtio PCI device operation
+ * @op: the operation to do
+ * @bar: the bar (only with BAR read/write messages)
+ * @reserved: reserved
+ * @size: the size of the read/write (in bytes)
+ * @addr: the address to read/write
+ * @data: the data, normally @size long, but just one byte for
+ *	%VIRTIO_PCIDEV_OP_MMIO_MEMSET
+ *
+ * Note: the fields are all in native (CPU) endian, however, the
+ * @data values will often be in little endian (see the ops above.)
+ */
+struct virtio_pcidev_msg {
+	__u8 op;
+	__u8 bar;
+	__u16 reserved;
+	__u32 size;
+	__u64 addr;
+	__u8 data[];
+};
+
+#endif /* _UAPI_LINUX_VIRTIO_PCIDEV_H */