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docs: ia64: convert to ReST
Rename the ia64 documentation files to ReST, add an index for them and adjust in order to produce a nice html output via the Sphinx build system. There are two upper case file names. Rename them to lower case, as we're working to avoid upper case file names at Documentation. At its new index.rst, let's add a :orphan: while this is not linked to the main index.rst file, in order to avoid build warnings. Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Mauro Carvalho Chehab
parent
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db9a0975a2
@ -1,20 +1,25 @@
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MEMORY ATTRIBUTE ALIASING ON IA-64
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==================================
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Memory Attribute Aliasing on IA-64
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==================================
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Bjorn Helgaas
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<bjorn.helgaas@hp.com>
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May 4, 2006
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Bjorn Helgaas <bjorn.helgaas@hp.com>
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May 4, 2006
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MEMORY ATTRIBUTES
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Memory Attributes
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=================
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Itanium supports several attributes for virtual memory references.
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The attribute is part of the virtual translation, i.e., it is
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contained in the TLB entry. The ones of most interest to the Linux
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kernel are:
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WB Write-back (cacheable)
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== ======================
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WB Write-back (cacheable)
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UC Uncacheable
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WC Write-coalescing
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== ======================
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System memory typically uses the WB attribute. The UC attribute is
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used for memory-mapped I/O devices. The WC attribute is uncacheable
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@ -29,7 +34,8 @@ MEMORY ATTRIBUTES
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support either WB or UC access to main memory, while others support
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only WB access.
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MEMORY MAP
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Memory Map
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==========
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Platform firmware describes the physical memory map and the
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supported attributes for each region. At boot-time, the kernel uses
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@ -55,7 +61,8 @@ MEMORY MAP
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The efi_memmap table is preserved unmodified because the original
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boot-time information is required for kexec.
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KERNEL IDENTITY MAPPINGS
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Kernel Identify Mappings
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========================
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Linux/ia64 identity mappings are done with large pages, currently
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either 16MB or 64MB, referred to as "granules." Cacheable mappings
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@ -74,17 +81,20 @@ KERNEL IDENTITY MAPPINGS
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are only partially populated, or populated with a combination of UC
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and WB regions.
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USER MAPPINGS
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User Mappings
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=============
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User mappings are typically done with 16K or 64K pages. The smaller
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page size allows more flexibility because only 16K or 64K has to be
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homogeneous with respect to memory attributes.
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POTENTIAL ATTRIBUTE ALIASING CASES
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Potential Attribute Aliasing Cases
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==================================
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There are several ways the kernel creates new mappings:
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mmap of /dev/mem
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mmap of /dev/mem
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----------------
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This uses remap_pfn_range(), which creates user mappings. These
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mappings may be either WB or UC. If the region being mapped
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@ -98,7 +108,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
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Since the EFI memory map does not describe MMIO on some
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machines, this should use an uncacheable mapping as a fallback.
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mmap of /sys/class/pci_bus/.../legacy_mem
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mmap of /sys/class/pci_bus/.../legacy_mem
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-----------------------------------------
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This is very similar to mmap of /dev/mem, except that legacy_mem
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only allows mmap of the one megabyte "legacy MMIO" area for a
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@ -112,9 +123,10 @@ POTENTIAL ATTRIBUTE ALIASING CASES
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The /dev/mem mmap constraints apply.
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mmap of /proc/bus/pci/.../??.?
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mmap of /proc/bus/pci/.../??.?
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------------------------------
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This is an MMIO mmap of PCI functions, which additionally may or
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This is an MMIO mmap of PCI functions, which additionally may or
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may not be requested as using the WC attribute.
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If WC is requested, and the region in kern_memmap is either WC
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@ -124,7 +136,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
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Otherwise, the user mapping must use the same attribute as the
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kernel mapping.
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read/write of /dev/mem
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read/write of /dev/mem
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----------------------
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This uses copy_from_user(), which implicitly uses a kernel
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identity mapping. This is obviously safe for things in
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@ -138,7 +151,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
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eight-byte accesses, and the copy_from_user() path doesn't allow
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any control over the access size, so this would be dangerous.
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ioremap()
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ioremap()
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---------
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This returns a mapping for use inside the kernel.
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@ -155,9 +169,11 @@ POTENTIAL ATTRIBUTE ALIASING CASES
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Failing all of the above, we have to fall back to a UC mapping.
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PAST PROBLEM CASES
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Past Problem Cases
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==================
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mmap of various MMIO regions from /dev/mem by "X" on Intel platforms
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mmap of various MMIO regions from /dev/mem by "X" on Intel platforms
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--------------------------------------------------------------------
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The EFI memory map may not report these MMIO regions.
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@ -166,12 +182,16 @@ PAST PROBLEM CASES
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succeed. It may create either WB or UC user mappings, depending
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on whether the region is in kern_memmap or the EFI memory map.
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mmap of 0x0-0x9FFFF /dev/mem by "hwinfo" on HP sx1000 with VGA enabled
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mmap of 0x0-0x9FFFF /dev/mem by "hwinfo" on HP sx1000 with VGA enabled
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----------------------------------------------------------------------
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The EFI memory map reports the following attributes:
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=============== ======= ==================
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0x00000-0x9FFFF WB only
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0xA0000-0xBFFFF UC only (VGA frame buffer)
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0xC0000-0xFFFFF WB only
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=============== ======= ==================
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This mmap is done with user pages, not kernel identity mappings,
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so it is safe to use WB mappings.
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@ -182,7 +202,8 @@ PAST PROBLEM CASES
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never generate an uncacheable reference to the WB-only areas unless
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the driver explicitly touches them.
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mmap of 0x0-0xFFFFF legacy_mem by "X"
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mmap of 0x0-0xFFFFF legacy_mem by "X"
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-------------------------------------
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If the EFI memory map reports that the entire range supports the
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same attributes, we can allow the mmap (and we will prefer WB if
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@ -197,15 +218,18 @@ PAST PROBLEM CASES
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that doesn't report the VGA frame buffer at all), we should fail the
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mmap and force the user to map just the specific region of interest.
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mmap of 0xA0000-0xBFFFF legacy_mem by "X" on HP sx1000 with VGA disabled
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mmap of 0xA0000-0xBFFFF legacy_mem by "X" on HP sx1000 with VGA disabled
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------------------------------------------------------------------------
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The EFI memory map reports the following attributes::
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The EFI memory map reports the following attributes:
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0x00000-0xFFFFF WB only (no VGA MMIO hole)
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This is a special case of the previous case, and the mmap should
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fail for the same reason as above.
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read of /sys/devices/.../rom
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read of /sys/devices/.../rom
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----------------------------
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For VGA devices, this may cause an ioremap() of 0xC0000. This
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used to be done with a UC mapping, because the VGA frame buffer
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@ -215,7 +239,8 @@ PAST PROBLEM CASES
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We should use WB page table mappings to avoid covering the VGA
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frame buffer.
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NOTES
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Notes
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=====
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[1] SDM rev 2.2, vol 2, sec 4.4.1.
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[2] SDM rev 2.2, vol 2, sec 4.4.6.
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@ -1,9 +1,13 @@
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==========================
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EFI Real Time Clock driver
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-------------------------------
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==========================
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S. Eranian <eranian@hpl.hp.com>
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March 2000
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I/ Introduction
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1. Introduction
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===============
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This document describes the efirtc.c driver has provided for
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the IA-64 platform.
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@ -16,7 +20,8 @@ SetTime(), GetWakeupTime(), SetWakeupTime() which are all supported by this
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driver. We describe those calls as well the design of the driver in the
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following sections.
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II/ Design Decisions
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2. Design Decisions
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===================
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The original ideas was to provide a very simple driver to get access to,
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at first, the time of day service. This is required in order to access, in a
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@ -50,45 +55,53 @@ we have created the include/linux/rtc.h header file to contain only the
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in include/linux/mc146818rtc.h.
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III/ Time of day service
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3. Time of day service
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======================
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The part of the driver gives access to the time of day service of EFI.
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Two ioctl()s, compatible with the legacy RTC calls:
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Read the CMOS clock: ioctl(d, RTC_RD_TIME, &rtc);
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Read the CMOS clock::
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Write the CMOS clock: ioctl(d, RTC_SET_TIME, &rtc);
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ioctl(d, RTC_RD_TIME, &rtc);
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Write the CMOS clock::
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ioctl(d, RTC_SET_TIME, &rtc);
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The rtc is a pointer to a data structure defined in rtc.h which is close
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to a struct tm:
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to a struct tm::
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struct rtc_time {
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon;
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int tm_year;
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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};
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struct rtc_time {
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon;
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int tm_year;
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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};
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The driver takes care of converting back an forth between the EFI time and
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this format.
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Those two ioctl()s can be exercised with the hwclock command:
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For reading:
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# /sbin/hwclock --show
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Mon Mar 6 15:32:32 2000 -0.910248 seconds
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For reading::
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For setting:
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# /sbin/hwclock --systohc
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# /sbin/hwclock --show
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Mon Mar 6 15:32:32 2000 -0.910248 seconds
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For setting::
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# /sbin/hwclock --systohc
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Root privileges are required to be able to set the time of day.
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IV/ Wakeup Alarm service
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4. Wakeup Alarm service
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=======================
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EFI provides an API by which one can program when a machine should wakeup,
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i.e. reboot. This is very different from the alarm provided by the legacy
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@ -98,22 +111,24 @@ introduced 2 news ioctl()s to the interface of an RTC.
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We have added 2 new ioctl()s that are specific to the EFI driver:
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Read the current state of the alarm
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ioctl(d, RTC_WKLAM_RD, &wkt)
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Read the current state of the alarm::
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Set the alarm or change its status
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ioctl(d, RTC_WKALM_SET, &wkt)
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ioctl(d, RTC_WKLAM_RD, &wkt)
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Set the alarm or change its status::
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ioctl(d, RTC_WKALM_SET, &wkt)
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The wkt structure encapsulates a struct rtc_time + 2 extra fields to get
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status information:
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status information::
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struct rtc_wkalrm {
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struct rtc_wkalrm {
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unsigned char enabled; /* =1 if alarm is enabled */
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unsigned char pending; /* =1 if alarm is pending */
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unsigned char enabled; /* =1 if alarm is enabled */
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unsigned char pending; /* =1 if alarm is pending */
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struct rtc_time time;
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}
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struct rtc_time time;
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}
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As of today, none of the existing user-level apps supports this feature.
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However writing such a program should be hard by simply using those two
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@ -121,7 +136,8 @@ ioctl().
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Root privileges are required to be able to set the alarm.
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V/ References.
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5. References
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=============
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Checkout the following Web site for more information on EFI:
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@ -1,4 +1,4 @@
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========================================
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IPF Machine Check (MC) error inject tool
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========================================
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@ -32,94 +32,94 @@ Errata: Itanium 2 Processors Specification Update lists some errata against
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the pal_mc_error_inject PAL procedure. The following err.conf has been tested
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on latest Montecito PAL.
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err.conf:
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err.conf::
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#This is configuration file for err_inject_tool.
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#The format of the each line is:
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#cpu, loop, interval, err_type_info, err_struct_info, err_data_buffer
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#where
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# cpu: logical cpu number the error will be inject in.
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# loop: times the error will be injected.
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# interval: In second. every so often one error is injected.
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# err_type_info, err_struct_info: PAL parameters.
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#
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#Note: All values are hex w/o or w/ 0x prefix.
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#This is configuration file for err_inject_tool.
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#The format of the each line is:
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#cpu, loop, interval, err_type_info, err_struct_info, err_data_buffer
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#where
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# cpu: logical cpu number the error will be inject in.
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# loop: times the error will be injected.
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# interval: In second. every so often one error is injected.
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# err_type_info, err_struct_info: PAL parameters.
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#
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#Note: All values are hex w/o or w/ 0x prefix.
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#On cpu2, inject only total 0x10 errors, interval 5 seconds
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#corrected, data cache, hier-2, physical addr(assigned by tool code).
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#working on Montecito latest PAL.
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2, 10, 5, 4101, 95
|
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#On cpu2, inject only total 0x10 errors, interval 5 seconds
|
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#corrected, data cache, hier-2, physical addr(assigned by tool code).
|
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#working on Montecito latest PAL.
|
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2, 10, 5, 4101, 95
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|
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#On cpu4, inject and consume total 0x10 errors, interval 5 seconds
|
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#corrected, data cache, hier-2, physical addr(assigned by tool code).
|
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#working on Montecito latest PAL.
|
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4, 10, 5, 4109, 95
|
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#On cpu4, inject and consume total 0x10 errors, interval 5 seconds
|
||||
#corrected, data cache, hier-2, physical addr(assigned by tool code).
|
||||
#working on Montecito latest PAL.
|
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4, 10, 5, 4109, 95
|
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|
||||
#On cpu15, inject and consume total 0x10 errors, interval 5 seconds
|
||||
#recoverable, DTR0, hier-2.
|
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#working on Montecito latest PAL.
|
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0xf, 0x10, 5, 4249, 15
|
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#On cpu15, inject and consume total 0x10 errors, interval 5 seconds
|
||||
#recoverable, DTR0, hier-2.
|
||||
#working on Montecito latest PAL.
|
||||
0xf, 0x10, 5, 4249, 15
|
||||
|
||||
The sample application source code:
|
||||
|
||||
err_injection_tool.c:
|
||||
err_injection_tool.c::
|
||||
|
||||
/*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
||||
* NON INFRINGEMENT. See the GNU General Public License for more
|
||||
* details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
* Copyright (C) 2006 Intel Co
|
||||
* Fenghua Yu <fenghua.yu@intel.com>
|
||||
*
|
||||
*/
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <sched.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdarg.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <time.h>
|
||||
#include <sys/ipc.h>
|
||||
#include <sys/sem.h>
|
||||
#include <sys/wait.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/shm.h>
|
||||
/*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful, but
|
||||
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
|
||||
* NON INFRINGEMENT. See the GNU General Public License for more
|
||||
* details.
|
||||
*
|
||||
* You should have received a copy of the GNU General Public License
|
||||
* along with this program; if not, write to the Free Software
|
||||
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
||||
*
|
||||
* Copyright (C) 2006 Intel Co
|
||||
* Fenghua Yu <fenghua.yu@intel.com>
|
||||
*
|
||||
*/
|
||||
#include <sys/types.h>
|
||||
#include <sys/stat.h>
|
||||
#include <fcntl.h>
|
||||
#include <stdio.h>
|
||||
#include <sched.h>
|
||||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <stdarg.h>
|
||||
#include <string.h>
|
||||
#include <errno.h>
|
||||
#include <time.h>
|
||||
#include <sys/ipc.h>
|
||||
#include <sys/sem.h>
|
||||
#include <sys/wait.h>
|
||||
#include <sys/mman.h>
|
||||
#include <sys/shm.h>
|
||||
|
||||
#define MAX_FN_SIZE 256
|
||||
#define MAX_BUF_SIZE 256
|
||||
#define DATA_BUF_SIZE 256
|
||||
#define NR_CPUS 512
|
||||
#define MAX_TASK_NUM 2048
|
||||
#define MIN_INTERVAL 5 // seconds
|
||||
#define ERR_DATA_BUFFER_SIZE 3 // Three 8-byte.
|
||||
#define PARA_FIELD_NUM 5
|
||||
#define MASK_SIZE (NR_CPUS/64)
|
||||
#define PATH_FORMAT "/sys/devices/system/cpu/cpu%d/err_inject/"
|
||||
#define MAX_FN_SIZE 256
|
||||
#define MAX_BUF_SIZE 256
|
||||
#define DATA_BUF_SIZE 256
|
||||
#define NR_CPUS 512
|
||||
#define MAX_TASK_NUM 2048
|
||||
#define MIN_INTERVAL 5 // seconds
|
||||
#define ERR_DATA_BUFFER_SIZE 3 // Three 8-byte.
|
||||
#define PARA_FIELD_NUM 5
|
||||
#define MASK_SIZE (NR_CPUS/64)
|
||||
#define PATH_FORMAT "/sys/devices/system/cpu/cpu%d/err_inject/"
|
||||
|
||||
int sched_setaffinity(pid_t pid, unsigned int len, unsigned long *mask);
|
||||
int sched_setaffinity(pid_t pid, unsigned int len, unsigned long *mask);
|
||||
|
||||
int verbose;
|
||||
#define vbprintf if (verbose) printf
|
||||
int verbose;
|
||||
#define vbprintf if (verbose) printf
|
||||
|
||||
int log_info(int cpu, const char *fmt, ...)
|
||||
{
|
||||
int log_info(int cpu, const char *fmt, ...)
|
||||
{
|
||||
FILE *log;
|
||||
char fn[MAX_FN_SIZE];
|
||||
char buf[MAX_BUF_SIZE];
|
||||
@ -142,12 +142,12 @@ int log_info(int cpu, const char *fmt, ...)
|
||||
fclose(log);
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
typedef unsigned long u64;
|
||||
typedef unsigned int u32;
|
||||
typedef unsigned long u64;
|
||||
typedef unsigned int u32;
|
||||
|
||||
typedef union err_type_info_u {
|
||||
typedef union err_type_info_u {
|
||||
struct {
|
||||
u64 mode : 3, /* 0-2 */
|
||||
err_inj : 3, /* 3-5 */
|
||||
@ -157,9 +157,9 @@ typedef union err_type_info_u {
|
||||
reserved : 48; /* 16-63 */
|
||||
} err_type_info_u;
|
||||
u64 err_type_info;
|
||||
} err_type_info_t;
|
||||
} err_type_info_t;
|
||||
|
||||
typedef union err_struct_info_u {
|
||||
typedef union err_struct_info_u {
|
||||
struct {
|
||||
u64 siv : 1, /* 0 */
|
||||
c_t : 2, /* 1-2 */
|
||||
@ -197,9 +197,9 @@ typedef union err_struct_info_u {
|
||||
u64 reserved;
|
||||
} err_struct_info_bus_processor_interconnect;
|
||||
u64 err_struct_info;
|
||||
} err_struct_info_t;
|
||||
} err_struct_info_t;
|
||||
|
||||
typedef union err_data_buffer_u {
|
||||
typedef union err_data_buffer_u {
|
||||
struct {
|
||||
u64 trigger_addr; /* 0-63 */
|
||||
u64 inj_addr; /* 64-127 */
|
||||
@ -221,9 +221,9 @@ typedef union err_data_buffer_u {
|
||||
u64 reserved; /* 0-63 */
|
||||
} err_data_buffer_bus_processor_interconnect;
|
||||
u64 err_data_buffer[ERR_DATA_BUFFER_SIZE];
|
||||
} err_data_buffer_t;
|
||||
} err_data_buffer_t;
|
||||
|
||||
typedef union capabilities_u {
|
||||
typedef union capabilities_u {
|
||||
struct {
|
||||
u64 i : 1,
|
||||
d : 1,
|
||||
@ -276,9 +276,9 @@ typedef union capabilities_u {
|
||||
struct {
|
||||
u64 reserved;
|
||||
} capabilities_bus_processor_interconnect;
|
||||
} capabilities_t;
|
||||
} capabilities_t;
|
||||
|
||||
typedef struct resources_s {
|
||||
typedef struct resources_s {
|
||||
u64 ibr0 : 1,
|
||||
ibr2 : 1,
|
||||
ibr4 : 1,
|
||||
@ -288,24 +288,24 @@ typedef struct resources_s {
|
||||
dbr4 : 1,
|
||||
dbr6 : 1,
|
||||
reserved : 48;
|
||||
} resources_t;
|
||||
} resources_t;
|
||||
|
||||
|
||||
long get_page_size(void)
|
||||
{
|
||||
long get_page_size(void)
|
||||
{
|
||||
long page_size=sysconf(_SC_PAGESIZE);
|
||||
return page_size;
|
||||
}
|
||||
}
|
||||
|
||||
#define PAGE_SIZE (get_page_size()==-1?0x4000:get_page_size())
|
||||
#define SHM_SIZE (2*PAGE_SIZE*NR_CPUS)
|
||||
#define SHM_VA 0x2000000100000000
|
||||
#define PAGE_SIZE (get_page_size()==-1?0x4000:get_page_size())
|
||||
#define SHM_SIZE (2*PAGE_SIZE*NR_CPUS)
|
||||
#define SHM_VA 0x2000000100000000
|
||||
|
||||
int shmid;
|
||||
void *shmaddr;
|
||||
int shmid;
|
||||
void *shmaddr;
|
||||
|
||||
int create_shm(void)
|
||||
{
|
||||
int create_shm(void)
|
||||
{
|
||||
key_t key;
|
||||
char fn[MAX_FN_SIZE];
|
||||
|
||||
@ -343,34 +343,34 @@ int create_shm(void)
|
||||
mlock(shmaddr, SHM_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int free_shm()
|
||||
{
|
||||
int free_shm()
|
||||
{
|
||||
munlock(shmaddr, SHM_SIZE);
|
||||
shmdt(shmaddr);
|
||||
shmdt(shmaddr);
|
||||
semctl(shmid, 0, IPC_RMID);
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
#ifdef _SEM_SEMUN_UNDEFINED
|
||||
union semun
|
||||
{
|
||||
#ifdef _SEM_SEMUN_UNDEFINED
|
||||
union semun
|
||||
{
|
||||
int val;
|
||||
struct semid_ds *buf;
|
||||
unsigned short int *array;
|
||||
struct seminfo *__buf;
|
||||
};
|
||||
#endif
|
||||
};
|
||||
#endif
|
||||
|
||||
u32 mode=1; /* 1: physical mode; 2: virtual mode. */
|
||||
int one_lock=1;
|
||||
key_t key[NR_CPUS];
|
||||
int semid[NR_CPUS];
|
||||
u32 mode=1; /* 1: physical mode; 2: virtual mode. */
|
||||
int one_lock=1;
|
||||
key_t key[NR_CPUS];
|
||||
int semid[NR_CPUS];
|
||||
|
||||
int create_sem(int cpu)
|
||||
{
|
||||
int create_sem(int cpu)
|
||||
{
|
||||
union semun arg;
|
||||
char fn[MAX_FN_SIZE];
|
||||
int sid;
|
||||
@ -407,37 +407,37 @@ int create_sem(int cpu)
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
static int lock(int cpu)
|
||||
{
|
||||
static int lock(int cpu)
|
||||
{
|
||||
struct sembuf lock;
|
||||
|
||||
lock.sem_num = cpu;
|
||||
lock.sem_op = 1;
|
||||
semop(semid[cpu], &lock, 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int unlock(int cpu)
|
||||
{
|
||||
static int unlock(int cpu)
|
||||
{
|
||||
struct sembuf unlock;
|
||||
|
||||
unlock.sem_num = cpu;
|
||||
unlock.sem_op = -1;
|
||||
semop(semid[cpu], &unlock, 1);
|
||||
|
||||
return 0;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
void free_sem(int cpu)
|
||||
{
|
||||
void free_sem(int cpu)
|
||||
{
|
||||
semctl(semid[cpu], 0, IPC_RMID);
|
||||
}
|
||||
}
|
||||
|
||||
int wr_multi(char *fn, unsigned long *data, int size)
|
||||
{
|
||||
int wr_multi(char *fn, unsigned long *data, int size)
|
||||
{
|
||||
int fd;
|
||||
char buf[MAX_BUF_SIZE];
|
||||
int ret;
|
||||
@ -459,15 +459,15 @@ int wr_multi(char *fn, unsigned long *data, int size)
|
||||
ret=write(fd, buf, sizeof(buf));
|
||||
close(fd);
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
int wr(char *fn, unsigned long data)
|
||||
{
|
||||
int wr(char *fn, unsigned long data)
|
||||
{
|
||||
return wr_multi(fn, &data, 1);
|
||||
}
|
||||
}
|
||||
|
||||
int rd(char *fn, unsigned long *data)
|
||||
{
|
||||
int rd(char *fn, unsigned long *data)
|
||||
{
|
||||
int fd;
|
||||
char buf[MAX_BUF_SIZE];
|
||||
|
||||
@ -480,10 +480,10 @@ int rd(char *fn, unsigned long *data)
|
||||
*data=strtoul(buf, NULL, 16);
|
||||
close(fd);
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int rd_status(char *path, int *status)
|
||||
{
|
||||
int rd_status(char *path, int *status)
|
||||
{
|
||||
char fn[MAX_FN_SIZE];
|
||||
sprintf(fn, "%s/status", path);
|
||||
if (rd(fn, (u64*)status)<0) {
|
||||
@ -492,10 +492,10 @@ int rd_status(char *path, int *status)
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int rd_capabilities(char *path, u64 *capabilities)
|
||||
{
|
||||
int rd_capabilities(char *path, u64 *capabilities)
|
||||
{
|
||||
char fn[MAX_FN_SIZE];
|
||||
sprintf(fn, "%s/capabilities", path);
|
||||
if (rd(fn, capabilities)<0) {
|
||||
@ -504,10 +504,10 @@ int rd_capabilities(char *path, u64 *capabilities)
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int rd_all(char *path)
|
||||
{
|
||||
int rd_all(char *path)
|
||||
{
|
||||
unsigned long err_type_info, err_struct_info, err_data_buffer;
|
||||
int status;
|
||||
unsigned long capabilities, resources;
|
||||
@ -556,11 +556,11 @@ int rd_all(char *path)
|
||||
printf("resources=%lx\n", resources);
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int query_capabilities(char *path, err_type_info_t err_type_info,
|
||||
int query_capabilities(char *path, err_type_info_t err_type_info,
|
||||
u64 *capabilities)
|
||||
{
|
||||
{
|
||||
char fn[MAX_FN_SIZE];
|
||||
err_struct_info_t err_struct_info;
|
||||
err_data_buffer_t err_data_buffer;
|
||||
@ -583,10 +583,10 @@ int query_capabilities(char *path, err_type_info_t err_type_info,
|
||||
return -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int query_all_capabilities()
|
||||
{
|
||||
int query_all_capabilities()
|
||||
{
|
||||
int status;
|
||||
err_type_info_t err_type_info;
|
||||
int err_sev, err_struct, struct_hier;
|
||||
@ -629,12 +629,12 @@ int query_all_capabilities()
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
int err_inject(int cpu, char *path, err_type_info_t err_type_info,
|
||||
int err_inject(int cpu, char *path, err_type_info_t err_type_info,
|
||||
err_struct_info_t err_struct_info,
|
||||
err_data_buffer_t err_data_buffer)
|
||||
{
|
||||
{
|
||||
int status;
|
||||
char fn[MAX_FN_SIZE];
|
||||
|
||||
@ -667,13 +667,13 @@ int err_inject(int cpu, char *path, err_type_info_t err_type_info,
|
||||
}
|
||||
|
||||
return status;
|
||||
}
|
||||
}
|
||||
|
||||
static int construct_data_buf(char *path, err_type_info_t err_type_info,
|
||||
static int construct_data_buf(char *path, err_type_info_t err_type_info,
|
||||
err_struct_info_t err_struct_info,
|
||||
err_data_buffer_t *err_data_buffer,
|
||||
void *va1)
|
||||
{
|
||||
{
|
||||
char fn[MAX_FN_SIZE];
|
||||
u64 virt_addr=0, phys_addr=0;
|
||||
|
||||
@ -710,22 +710,22 @@ static int construct_data_buf(char *path, err_type_info_t err_type_info,
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
typedef struct {
|
||||
typedef struct {
|
||||
u64 cpu;
|
||||
u64 loop;
|
||||
u64 interval;
|
||||
u64 err_type_info;
|
||||
u64 err_struct_info;
|
||||
u64 err_data_buffer[ERR_DATA_BUFFER_SIZE];
|
||||
} parameters_t;
|
||||
} parameters_t;
|
||||
|
||||
parameters_t line_para;
|
||||
int para;
|
||||
parameters_t line_para;
|
||||
int para;
|
||||
|
||||
static int empty_data_buffer(u64 *err_data_buffer)
|
||||
{
|
||||
static int empty_data_buffer(u64 *err_data_buffer)
|
||||
{
|
||||
int empty=1;
|
||||
int i;
|
||||
|
||||
@ -734,10 +734,10 @@ static int empty_data_buffer(u64 *err_data_buffer)
|
||||
empty=0;
|
||||
|
||||
return empty;
|
||||
}
|
||||
}
|
||||
|
||||
int err_inj()
|
||||
{
|
||||
int err_inj()
|
||||
{
|
||||
err_type_info_t err_type_info;
|
||||
err_struct_info_t err_struct_info;
|
||||
err_data_buffer_t err_data_buffer;
|
||||
@ -951,10 +951,10 @@ int err_inj()
|
||||
printf("All done.\n");
|
||||
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
|
||||
void help()
|
||||
{
|
||||
void help()
|
||||
{
|
||||
printf("err_inject_tool:\n");
|
||||
printf("\t-q: query all capabilities. default: off\n");
|
||||
printf("\t-m: procedure mode. 1: physical 2: virtual. default: 1\n");
|
||||
@ -977,10 +977,10 @@ void help()
|
||||
printf("The tool will take err.conf file as ");
|
||||
printf("input to inject single or multiple errors ");
|
||||
printf("on one or multiple cpus in parallel.\n");
|
||||
}
|
||||
}
|
||||
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
int main(int argc, char **argv)
|
||||
{
|
||||
char c;
|
||||
int do_err_inj=0;
|
||||
int do_query_all=0;
|
||||
@ -1031,7 +1031,7 @@ int main(int argc, char **argv)
|
||||
if (count!=PARA_FIELD_NUM+3) {
|
||||
line_para.err_data_buffer[0]=-1,
|
||||
line_para.err_data_buffer[1]=-1,
|
||||
line_para.err_data_buffer[2]=-1;
|
||||
line_para.err_data_buffer[2]=-1;
|
||||
count=sscanf(optarg, "%lx, %lx, %lx, %lx, %lx\n",
|
||||
&line_para.cpu,
|
||||
&line_para.loop,
|
||||
@ -1064,5 +1064,4 @@ int main(int argc, char **argv)
|
||||
help();
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
}
|
||||
@ -1,9 +1,9 @@
|
||||
-*-Mode: outline-*-
|
||||
|
||||
Light-weight System Calls for IA-64
|
||||
-----------------------------------
|
||||
===================================
|
||||
Light-weight System Calls for IA-64
|
||||
===================================
|
||||
|
||||
Started: 13-Jan-2003
|
||||
|
||||
Last update: 27-Sep-2003
|
||||
|
||||
David Mosberger-Tang
|
||||
@ -52,12 +52,13 @@ privilege level is at level 0, this means that fsys-mode requires some
|
||||
care (see below).
|
||||
|
||||
|
||||
* How to tell fsys-mode
|
||||
How to tell fsys-mode
|
||||
=====================
|
||||
|
||||
Linux operates in fsys-mode when (a) the privilege level is 0 (most
|
||||
privileged) and (b) the stacks have NOT been switched to kernel memory
|
||||
yet. For convenience, the header file <asm-ia64/ptrace.h> provides
|
||||
three macros:
|
||||
three macros::
|
||||
|
||||
user_mode(regs)
|
||||
user_stack(task,regs)
|
||||
@ -70,11 +71,12 @@ to by "regs" was executing in user mode (privilege level 3).
|
||||
user_stack() returns TRUE if the state pointed to by "regs" was
|
||||
executing on the user-level stack(s). Finally, fsys_mode() returns
|
||||
TRUE if the CPU state pointed to by "regs" was executing in fsys-mode.
|
||||
The fsys_mode() macro is equivalent to the expression:
|
||||
The fsys_mode() macro is equivalent to the expression::
|
||||
|
||||
!user_mode(regs) && user_stack(task,regs)
|
||||
|
||||
* How to write an fsyscall handler
|
||||
How to write an fsyscall handler
|
||||
================================
|
||||
|
||||
The file arch/ia64/kernel/fsys.S contains a table of fsyscall-handlers
|
||||
(fsyscall_table). This table contains one entry for each system call.
|
||||
@ -87,66 +89,72 @@ of the getpid() system call.
|
||||
|
||||
The entry and exit-state of an fsyscall handler is as follows:
|
||||
|
||||
** Machine state on entry to fsyscall handler:
|
||||
Machine state on entry to fsyscall handler
|
||||
------------------------------------------
|
||||
|
||||
- r10 = 0
|
||||
- r11 = saved ar.pfs (a user-level value)
|
||||
- r15 = system call number
|
||||
- r16 = "current" task pointer (in normal kernel-mode, this is in r13)
|
||||
- r32-r39 = system call arguments
|
||||
- b6 = return address (a user-level value)
|
||||
- ar.pfs = previous frame-state (a user-level value)
|
||||
- PSR.be = cleared to zero (i.e., little-endian byte order is in effect)
|
||||
- all other registers may contain values passed in from user-mode
|
||||
========= ===============================================================
|
||||
r10 0
|
||||
r11 saved ar.pfs (a user-level value)
|
||||
r15 system call number
|
||||
r16 "current" task pointer (in normal kernel-mode, this is in r13)
|
||||
r32-r39 system call arguments
|
||||
b6 return address (a user-level value)
|
||||
ar.pfs previous frame-state (a user-level value)
|
||||
PSR.be cleared to zero (i.e., little-endian byte order is in effect)
|
||||
- all other registers may contain values passed in from user-mode
|
||||
========= ===============================================================
|
||||
|
||||
** Required machine state on exit to fsyscall handler:
|
||||
Required machine state on exit to fsyscall handler
|
||||
--------------------------------------------------
|
||||
|
||||
- r11 = saved ar.pfs (as passed into the fsyscall handler)
|
||||
- r15 = system call number (as passed into the fsyscall handler)
|
||||
- r32-r39 = system call arguments (as passed into the fsyscall handler)
|
||||
- b6 = return address (as passed into the fsyscall handler)
|
||||
- ar.pfs = previous frame-state (as passed into the fsyscall handler)
|
||||
========= ===========================================================
|
||||
r11 saved ar.pfs (as passed into the fsyscall handler)
|
||||
r15 system call number (as passed into the fsyscall handler)
|
||||
r32-r39 system call arguments (as passed into the fsyscall handler)
|
||||
b6 return address (as passed into the fsyscall handler)
|
||||
ar.pfs previous frame-state (as passed into the fsyscall handler)
|
||||
========= ===========================================================
|
||||
|
||||
Fsyscall handlers can execute with very little overhead, but with that
|
||||
speed comes a set of restrictions:
|
||||
|
||||
o Fsyscall-handlers MUST check for any pending work in the flags
|
||||
* Fsyscall-handlers MUST check for any pending work in the flags
|
||||
member of the thread-info structure and if any of the
|
||||
TIF_ALLWORK_MASK flags are set, the handler needs to fall back on
|
||||
doing a full system call (by calling fsys_fallback_syscall).
|
||||
|
||||
o Fsyscall-handlers MUST preserve incoming arguments (r32-r39, r11,
|
||||
* Fsyscall-handlers MUST preserve incoming arguments (r32-r39, r11,
|
||||
r15, b6, and ar.pfs) because they will be needed in case of a
|
||||
system call restart. Of course, all "preserved" registers also
|
||||
must be preserved, in accordance to the normal calling conventions.
|
||||
|
||||
o Fsyscall-handlers MUST check argument registers for containing a
|
||||
* Fsyscall-handlers MUST check argument registers for containing a
|
||||
NaT value before using them in any way that could trigger a
|
||||
NaT-consumption fault. If a system call argument is found to
|
||||
contain a NaT value, an fsyscall-handler may return immediately
|
||||
with r8=EINVAL, r10=-1.
|
||||
|
||||
o Fsyscall-handlers MUST NOT use the "alloc" instruction or perform
|
||||
* Fsyscall-handlers MUST NOT use the "alloc" instruction or perform
|
||||
any other operation that would trigger mandatory RSE
|
||||
(register-stack engine) traffic.
|
||||
|
||||
o Fsyscall-handlers MUST NOT write to any stacked registers because
|
||||
* Fsyscall-handlers MUST NOT write to any stacked registers because
|
||||
it is not safe to assume that user-level called a handler with the
|
||||
proper number of arguments.
|
||||
|
||||
o Fsyscall-handlers need to be careful when accessing per-CPU variables:
|
||||
* Fsyscall-handlers need to be careful when accessing per-CPU variables:
|
||||
unless proper safe-guards are taken (e.g., interruptions are avoided),
|
||||
execution may be pre-empted and resumed on another CPU at any given
|
||||
time.
|
||||
|
||||
o Fsyscall-handlers must be careful not to leak sensitive kernel'
|
||||
* Fsyscall-handlers must be careful not to leak sensitive kernel'
|
||||
information back to user-level. In particular, before returning to
|
||||
user-level, care needs to be taken to clear any scratch registers
|
||||
that could contain sensitive information (note that the current
|
||||
task pointer is not considered sensitive: it's already exposed
|
||||
through ar.k6).
|
||||
|
||||
o Fsyscall-handlers MUST NOT access user-memory without first
|
||||
* Fsyscall-handlers MUST NOT access user-memory without first
|
||||
validating access-permission (this can be done typically via
|
||||
probe.r.fault and/or probe.w.fault) and without guarding against
|
||||
memory access exceptions (this can be done with the EX() macros
|
||||
@ -162,7 +170,8 @@ fast system call execution (while fully preserving system call
|
||||
semantics), but there is also a lot of flexibility in handling more
|
||||
complicated cases.
|
||||
|
||||
* Signal handling
|
||||
Signal handling
|
||||
===============
|
||||
|
||||
The delivery of (asynchronous) signals must be delayed until fsys-mode
|
||||
is exited. This is accomplished with the help of the lower-privilege
|
||||
@ -173,7 +182,8 @@ PSR.lp and returns immediately. When fsys-mode is exited via the
|
||||
occur. The trap handler clears PSR.lp again and returns immediately.
|
||||
The kernel exit path then checks for and delivers any pending signals.
|
||||
|
||||
* PSR Handling
|
||||
PSR Handling
|
||||
============
|
||||
|
||||
The "epc" instruction doesn't change the contents of PSR at all. This
|
||||
is in contrast to a regular interruption, which clears almost all
|
||||
@ -181,6 +191,7 @@ bits. Because of that, some care needs to be taken to ensure things
|
||||
work as expected. The following discussion describes how each PSR bit
|
||||
is handled.
|
||||
|
||||
======= =======================================================================
|
||||
PSR.be Cleared when entering fsys-mode. A srlz.d instruction is used
|
||||
to ensure the CPU is in little-endian mode before the first
|
||||
load/store instruction is executed. PSR.be is normally NOT
|
||||
@ -202,7 +213,8 @@ PSR.pp Unchanged.
|
||||
PSR.di Unchanged.
|
||||
PSR.si Unchanged.
|
||||
PSR.db Unchanged. The kernel prevents user-level from setting a hardware
|
||||
breakpoint that triggers at any privilege level other than 3 (user-mode).
|
||||
breakpoint that triggers at any privilege level other than
|
||||
3 (user-mode).
|
||||
PSR.lp Unchanged.
|
||||
PSR.tb Lazy redirect. If a taken-branch trap occurs while in
|
||||
fsys-mode, the trap-handler modifies the saved machine state
|
||||
@ -235,47 +247,52 @@ PSR.ed Unchanged. Note: This bit could only have an effect if an fsys-mode
|
||||
PSR.bn Unchanged. Note: fsys-mode handlers may clear the bit, if needed.
|
||||
Doing so requires clearing PSR.i and PSR.ic as well.
|
||||
PSR.ia Unchanged. Note: the ia64 linux kernel never sets this bit.
|
||||
======= =======================================================================
|
||||
|
||||
* Using fast system calls
|
||||
Using fast system calls
|
||||
=======================
|
||||
|
||||
To use fast system calls, userspace applications need simply call
|
||||
__kernel_syscall_via_epc(). For example
|
||||
|
||||
-- example fgettimeofday() call --
|
||||
|
||||
-- fgettimeofday.S --
|
||||
|
||||
#include <asm/asmmacro.h>
|
||||
::
|
||||
|
||||
GLOBAL_ENTRY(fgettimeofday)
|
||||
.prologue
|
||||
.save ar.pfs, r11
|
||||
mov r11 = ar.pfs
|
||||
.body
|
||||
#include <asm/asmmacro.h>
|
||||
|
||||
mov r2 = 0xa000000000020660;; // gate address
|
||||
GLOBAL_ENTRY(fgettimeofday)
|
||||
.prologue
|
||||
.save ar.pfs, r11
|
||||
mov r11 = ar.pfs
|
||||
.body
|
||||
|
||||
mov r2 = 0xa000000000020660;; // gate address
|
||||
// found by inspection of System.map for the
|
||||
// __kernel_syscall_via_epc() function. See
|
||||
// below for how to do this for real.
|
||||
|
||||
mov b7 = r2
|
||||
mov r15 = 1087 // gettimeofday syscall
|
||||
;;
|
||||
br.call.sptk.many b6 = b7
|
||||
;;
|
||||
mov b7 = r2
|
||||
mov r15 = 1087 // gettimeofday syscall
|
||||
;;
|
||||
br.call.sptk.many b6 = b7
|
||||
;;
|
||||
|
||||
.restore sp
|
||||
.restore sp
|
||||
|
||||
mov ar.pfs = r11
|
||||
br.ret.sptk.many rp;; // return to caller
|
||||
END(fgettimeofday)
|
||||
mov ar.pfs = r11
|
||||
br.ret.sptk.many rp;; // return to caller
|
||||
END(fgettimeofday)
|
||||
|
||||
-- end fgettimeofday.S --
|
||||
|
||||
In reality, getting the gate address is accomplished by two extra
|
||||
values passed via the ELF auxiliary vector (include/asm-ia64/elf.h)
|
||||
|
||||
o AT_SYSINFO : is the address of __kernel_syscall_via_epc()
|
||||
o AT_SYSINFO_EHDR : is the address of the kernel gate ELF DSO
|
||||
* AT_SYSINFO : is the address of __kernel_syscall_via_epc()
|
||||
* AT_SYSINFO_EHDR : is the address of the kernel gate ELF DSO
|
||||
|
||||
The ELF DSO is a pre-linked library that is mapped in by the kernel at
|
||||
the gate page. It is a proper ELF shared object so, with a dynamic
|
||||
@ -1,43 +1,49 @@
|
||||
Linux kernel release 2.4.xx for the IA-64 Platform
|
||||
===========================================
|
||||
Linux kernel release for the IA-64 Platform
|
||||
===========================================
|
||||
|
||||
These are the release notes for Linux version 2.4 for IA-64
|
||||
These are the release notes for Linux since version 2.4 for IA-64
|
||||
platform. This document provides information specific to IA-64
|
||||
ONLY, to get additional information about the Linux kernel also
|
||||
read the original Linux README provided with the kernel.
|
||||
|
||||
INSTALLING the kernel:
|
||||
Installing the Kernel
|
||||
=====================
|
||||
|
||||
- IA-64 kernel installation is the same as the other platforms, see
|
||||
original README for details.
|
||||
|
||||
|
||||
SOFTWARE REQUIREMENTS
|
||||
Software Requirements
|
||||
=====================
|
||||
|
||||
Compiling and running this kernel requires an IA-64 compliant GCC
|
||||
compiler. And various software packages also compiled with an
|
||||
IA-64 compliant GCC compiler.
|
||||
|
||||
|
||||
CONFIGURING the kernel:
|
||||
Configuring the Kernel
|
||||
======================
|
||||
|
||||
Configuration is the same, see original README for details.
|
||||
|
||||
|
||||
COMPILING the kernel:
|
||||
Compiling the Kernel:
|
||||
|
||||
- Compiling this kernel doesn't differ from other platform so read
|
||||
the original README for details BUT make sure you have an IA-64
|
||||
compliant GCC compiler.
|
||||
|
||||
IA-64 SPECIFICS
|
||||
IA-64 Specifics
|
||||
===============
|
||||
|
||||
- General issues:
|
||||
|
||||
o Hardly any performance tuning has been done. Obvious targets
|
||||
* Hardly any performance tuning has been done. Obvious targets
|
||||
include the library routines (IP checksum, etc.). Less
|
||||
obvious targets include making sure we don't flush the TLB
|
||||
needlessly, etc.
|
||||
|
||||
o SMP locks cleanup/optimization
|
||||
* SMP locks cleanup/optimization
|
||||
|
||||
o IA32 support. Currently experimental. It mostly works.
|
||||
* IA32 support. Currently experimental. It mostly works.
|
||||
18
Documentation/ia64/index.rst
Normal file
18
Documentation/ia64/index.rst
Normal file
@ -0,0 +1,18 @@
|
||||
:orphan:
|
||||
|
||||
==================
|
||||
IA-64 Architecture
|
||||
==================
|
||||
|
||||
.. toctree::
|
||||
:maxdepth: 1
|
||||
|
||||
ia64
|
||||
aliasing
|
||||
efirtc
|
||||
err_inject
|
||||
fsys
|
||||
irq-redir
|
||||
mca
|
||||
serial
|
||||
xen
|
||||
@ -1,6 +1,8 @@
|
||||
==============================
|
||||
IRQ affinity on IA64 platforms
|
||||
------------------------------
|
||||
07.01.2002, Erich Focht <efocht@ess.nec.de>
|
||||
==============================
|
||||
|
||||
07.01.2002, Erich Focht <efocht@ess.nec.de>
|
||||
|
||||
|
||||
By writing to /proc/irq/IRQ#/smp_affinity the interrupt routing can be
|
||||
@ -12,22 +14,27 @@ IRQ target is one particular CPU and cannot be a mask of several
|
||||
CPUs. Only the first non-zero bit is taken into account.
|
||||
|
||||
|
||||
Usage examples:
|
||||
Usage examples
|
||||
==============
|
||||
|
||||
The target CPU has to be specified as a hexadecimal CPU mask. The
|
||||
first non-zero bit is the selected CPU. This format has been kept for
|
||||
compatibility reasons with i386.
|
||||
|
||||
Set the delivery mode of interrupt 41 to fixed and route the
|
||||
interrupts to CPU #3 (logical CPU number) (2^3=0x08):
|
||||
interrupts to CPU #3 (logical CPU number) (2^3=0x08)::
|
||||
|
||||
echo "8" >/proc/irq/41/smp_affinity
|
||||
|
||||
Set the default route for IRQ number 41 to CPU 6 in lowest priority
|
||||
delivery mode (redirectable):
|
||||
delivery mode (redirectable)::
|
||||
|
||||
echo "r 40" >/proc/irq/41/smp_affinity
|
||||
|
||||
The output of the command
|
||||
The output of the command::
|
||||
|
||||
cat /proc/irq/IRQ#/smp_affinity
|
||||
|
||||
gives the target CPU mask for the specified interrupt vector. If the CPU
|
||||
mask is preceded by the character "r", the interrupt is redirectable
|
||||
(i.e. lowest priority mode routing is used), otherwise its route is
|
||||
@ -35,7 +42,8 @@ fixed.
|
||||
|
||||
|
||||
|
||||
Initialization and default behavior:
|
||||
Initialization and default behavior
|
||||
===================================
|
||||
|
||||
If the platform features IRQ redirection (info provided by SAL) all
|
||||
IO-SAPIC interrupts are initialized with CPU#0 as their default target
|
||||
@ -43,9 +51,11 @@ and the routing is the so called "lowest priority mode" (actually
|
||||
fixed SAPIC mode with hint). The XTP chipset registers are used as hints
|
||||
for the IRQ routing. Currently in Linux XTP registers can have three
|
||||
values:
|
||||
|
||||
- minimal for an idle task,
|
||||
- normal if any other task runs,
|
||||
- maximal if the CPU is going to be switched off.
|
||||
|
||||
The IRQ is routed to the CPU with lowest XTP register value, the
|
||||
search begins at the default CPU. Therefore most of the interrupts
|
||||
will be handled by CPU #0.
|
||||
@ -53,12 +63,14 @@ will be handled by CPU #0.
|
||||
If the platform doesn't feature interrupt redirection IOSAPIC fixed
|
||||
routing is used. The target CPUs are distributed in a round robin
|
||||
manner. IRQs will be routed only to the selected target CPUs. Check
|
||||
with
|
||||
with::
|
||||
|
||||
cat /proc/interrupts
|
||||
|
||||
|
||||
|
||||
Comments:
|
||||
Comments
|
||||
========
|
||||
|
||||
On large (multi-node) systems it is recommended to route the IRQs to
|
||||
the node to which the corresponding device is connected.
|
||||
@ -66,4 +78,3 @@ For systems like the NEC AzusA we get IRQ node-affinity for free. This
|
||||
is because usually the chipsets on each node redirect the interrupts
|
||||
only to their own CPUs (as they cannot see the XTP registers on the
|
||||
other nodes).
|
||||
|
||||
@ -1,5 +1,8 @@
|
||||
An ad-hoc collection of notes on IA64 MCA and INIT processing. Feel
|
||||
free to update it with notes about any area that is not clear.
|
||||
=============================================================
|
||||
An ad-hoc collection of notes on IA64 MCA and INIT processing
|
||||
=============================================================
|
||||
|
||||
Feel free to update it with notes about any area that is not clear.
|
||||
|
||||
---
|
||||
|
||||
@ -82,7 +85,8 @@ if we have a choice here.
|
||||
own stack as running on that cpu. Then a recursive error gets a
|
||||
trace of the failing handler's "task".
|
||||
|
||||
[1] My (Keith Owens) original design called for ia64 to separate its
|
||||
[1]
|
||||
My (Keith Owens) original design called for ia64 to separate its
|
||||
struct task and the kernel stacks. Then the MCA/INIT data would be
|
||||
chained stacks like i386 interrupt stacks. But that required
|
||||
radical surgery on the rest of ia64, plus extra hard wired TLB
|
||||
@ -1,4 +1,9 @@
|
||||
SERIAL DEVICE NAMING
|
||||
==============
|
||||
Serial Devices
|
||||
==============
|
||||
|
||||
Serial Device Naming
|
||||
====================
|
||||
|
||||
As of 2.6.10, serial devices on ia64 are named based on the
|
||||
order of ACPI and PCI enumeration. The first device in the
|
||||
@ -30,17 +35,21 @@ SERIAL DEVICE NAMING
|
||||
(described in the ACPI namespace) plus an MP[2] (a PCI device) has
|
||||
these ports:
|
||||
|
||||
pre-2.6.10 pre-2.6.10
|
||||
MMIO (EFI console (EFI console
|
||||
address on builtin) on MP port) 2.6.10
|
||||
========== ========== ========== ======
|
||||
========== ========== ============ ============ =======
|
||||
Type MMIO pre-2.6.10 pre-2.6.10 2.6.10+
|
||||
address
|
||||
(EFI console (EFI console
|
||||
on builtin) on MP port)
|
||||
========== ========== ============ ============ =======
|
||||
builtin 0xff5e0000 ttyS0 ttyS1 ttyS0
|
||||
MP UPS 0xf8031000 ttyS1 ttyS2 ttyS1
|
||||
MP Console 0xf8030000 ttyS2 ttyS0 ttyS2
|
||||
MP 2 0xf8030010 ttyS3 ttyS3 ttyS3
|
||||
MP 3 0xf8030038 ttyS4 ttyS4 ttyS4
|
||||
========== ========== ============ ============ =======
|
||||
|
||||
CONSOLE SELECTION
|
||||
Console Selection
|
||||
=================
|
||||
|
||||
EFI knows what your console devices are, but it doesn't tell the
|
||||
kernel quite enough to actually locate them. The DIG64 HCDP
|
||||
@ -67,7 +76,8 @@ CONSOLE SELECTION
|
||||
entries in /etc/inittab (for getty) and /etc/securetty (to allow
|
||||
root login).
|
||||
|
||||
EARLY SERIAL CONSOLE
|
||||
Early Serial Console
|
||||
====================
|
||||
|
||||
The kernel can't start using a serial console until it knows where
|
||||
the device lives. Normally this happens when the driver enumerates
|
||||
@ -80,7 +90,8 @@ EARLY SERIAL CONSOLE
|
||||
or if the EFI console path contains only a UART device and the
|
||||
firmware supplies an HCDP.
|
||||
|
||||
TROUBLESHOOTING SERIAL CONSOLE PROBLEMS
|
||||
Troubleshooting Serial Console Problems
|
||||
=======================================
|
||||
|
||||
No kernel output after elilo prints "Uncompressing Linux... done":
|
||||
|
||||
@ -133,19 +144,22 @@ TROUBLESHOOTING SERIAL CONSOLE PROBLEMS
|
||||
|
||||
|
||||
|
||||
[1] http://www.dig64.org/specifications/agreement
|
||||
[1]
|
||||
http://www.dig64.org/specifications/agreement
|
||||
The table was originally defined as the "HCDP" for "Headless
|
||||
Console/Debug Port." The current version is the "PCDP" for
|
||||
"Primary Console and Debug Port Devices."
|
||||
|
||||
[2] The HP MP (management processor) is a PCI device that provides
|
||||
[2]
|
||||
The HP MP (management processor) is a PCI device that provides
|
||||
several UARTs. One of the UARTs is often used as a console; the
|
||||
EFI Boot Manager identifies it as "Acpi(HWP0002,700)/Pci(...)/Uart".
|
||||
The external connection is usually a 25-pin connector, and a
|
||||
special dongle converts that to three 9-pin connectors, one of
|
||||
which is labelled "Console."
|
||||
|
||||
[3] EFI console devices are configured using the EFI Boot Manager
|
||||
[3]
|
||||
EFI console devices are configured using the EFI Boot Manager
|
||||
"Boot option maintenance" menu. You may have to interrupt the
|
||||
boot sequence to use this menu, and you will have to reset the
|
||||
box after changing console configuration.
|
||||
206
Documentation/ia64/xen.rst
Normal file
206
Documentation/ia64/xen.rst
Normal file
@ -0,0 +1,206 @@
|
||||
********************************************************
|
||||
Recipe for getting/building/running Xen/ia64 with pv_ops
|
||||
********************************************************
|
||||
This recipe describes how to get xen-ia64 source and build it,
|
||||
and run domU with pv_ops.
|
||||
|
||||
Requirements
|
||||
============
|
||||
|
||||
- python
|
||||
- mercurial
|
||||
it (aka "hg") is an open-source source code
|
||||
management software. See the below.
|
||||
http://www.selenic.com/mercurial/wiki/
|
||||
- git
|
||||
- bridge-utils
|
||||
|
||||
Getting and Building Xen and Dom0
|
||||
=================================
|
||||
|
||||
My environment is:
|
||||
|
||||
- Machine : Tiger4
|
||||
- Domain0 OS : RHEL5
|
||||
- DomainU OS : RHEL5
|
||||
|
||||
1. Download source::
|
||||
|
||||
# hg clone http://xenbits.xensource.com/ext/ia64/xen-unstable.hg
|
||||
# cd xen-unstable.hg
|
||||
# hg clone http://xenbits.xensource.com/ext/ia64/linux-2.6.18-xen.hg
|
||||
|
||||
2. # make world
|
||||
|
||||
3. # make install-tools
|
||||
|
||||
4. copy kernels and xen::
|
||||
|
||||
# cp xen/xen.gz /boot/efi/efi/redhat/
|
||||
# cp build-linux-2.6.18-xen_ia64/vmlinux.gz \
|
||||
/boot/efi/efi/redhat/vmlinuz-2.6.18.8-xen
|
||||
|
||||
5. make initrd for Dom0/DomU::
|
||||
|
||||
# make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \
|
||||
O=$(pwd)/build-linux-2.6.18-xen_ia64
|
||||
# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6.18.8-xen.img \
|
||||
2.6.18.8-xen --builtin mptspi --builtin mptbase \
|
||||
--builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \
|
||||
--builtin ehci-hcd
|
||||
|
||||
Making a disk image for guest OS
|
||||
================================
|
||||
|
||||
1. make file::
|
||||
|
||||
# dd if=/dev/zero of=/root/rhel5.img bs=1M seek=4096 count=0
|
||||
# mke2fs -F -j /root/rhel5.img
|
||||
# mount -o loop /root/rhel5.img /mnt
|
||||
# cp -ax /{dev,var,etc,usr,bin,sbin,lib} /mnt
|
||||
# mkdir /mnt/{root,proc,sys,home,tmp}
|
||||
|
||||
Note: You may miss some device files. If so, please create them
|
||||
with mknod. Or you can use tar instead of cp.
|
||||
|
||||
2. modify DomU's fstab::
|
||||
|
||||
# vi /mnt/etc/fstab
|
||||
/dev/xvda1 / ext3 defaults 1 1
|
||||
none /dev/pts devpts gid=5,mode=620 0 0
|
||||
none /dev/shm tmpfs defaults 0 0
|
||||
none /proc proc defaults 0 0
|
||||
none /sys sysfs defaults 0 0
|
||||
|
||||
3. modify inittab
|
||||
|
||||
set runlevel to 3 to avoid X trying to start::
|
||||
|
||||
# vi /mnt/etc/inittab
|
||||
id:3:initdefault:
|
||||
|
||||
Start a getty on the hvc0 console::
|
||||
|
||||
X0:2345:respawn:/sbin/mingetty hvc0
|
||||
|
||||
tty1-6 mingetty can be commented out
|
||||
|
||||
4. add hvc0 into /etc/securetty::
|
||||
|
||||
# vi /mnt/etc/securetty (add hvc0)
|
||||
|
||||
5. umount::
|
||||
|
||||
# umount /mnt
|
||||
|
||||
FYI, virt-manager can also make a disk image for guest OS.
|
||||
It's GUI tools and easy to make it.
|
||||
|
||||
Boot Xen & Domain0
|
||||
==================
|
||||
|
||||
1. replace elilo
|
||||
elilo of RHEL5 can boot Xen and Dom0.
|
||||
If you use old elilo (e.g RHEL4), please download from the below
|
||||
http://elilo.sourceforge.net/cgi-bin/blosxom
|
||||
and copy into /boot/efi/efi/redhat/::
|
||||
|
||||
# cp elilo-3.6-ia64.efi /boot/efi/efi/redhat/elilo.efi
|
||||
|
||||
2. modify elilo.conf (like the below)::
|
||||
|
||||
# vi /boot/efi/efi/redhat/elilo.conf
|
||||
prompt
|
||||
timeout=20
|
||||
default=xen
|
||||
relocatable
|
||||
|
||||
image=vmlinuz-2.6.18.8-xen
|
||||
label=xen
|
||||
vmm=xen.gz
|
||||
initrd=initrd-2.6.18.8-xen.img
|
||||
read-only
|
||||
append=" -- rhgb root=/dev/sda2"
|
||||
|
||||
The append options before "--" are for xen hypervisor,
|
||||
the options after "--" are for dom0.
|
||||
|
||||
FYI, your machine may need console options like
|
||||
"com1=19200,8n1 console=vga,com1". For example,
|
||||
append="com1=19200,8n1 console=vga,com1 -- rhgb console=tty0 \
|
||||
console=ttyS0 root=/dev/sda2"
|
||||
|
||||
Getting and Building domU with pv_ops
|
||||
=====================================
|
||||
|
||||
1. get pv_ops tree::
|
||||
|
||||
# git clone http://people.valinux.co.jp/~yamahata/xen-ia64/linux-2.6-xen-ia64.git/
|
||||
|
||||
2. git branch (if necessary)::
|
||||
|
||||
# cd linux-2.6-xen-ia64/
|
||||
# git checkout -b your_branch origin/xen-ia64-domu-minimal-2008may19
|
||||
|
||||
Note:
|
||||
The current branch is xen-ia64-domu-minimal-2008may19.
|
||||
But you would find the new branch. You can see with
|
||||
"git branch -r" to get the branch lists.
|
||||
|
||||
http://people.valinux.co.jp/~yamahata/xen-ia64/for_eagl/linux-2.6-ia64-pv-ops.git/
|
||||
|
||||
is also available.
|
||||
|
||||
The tree is based on
|
||||
|
||||
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 test)
|
||||
|
||||
3. copy .config for pv_ops of domU::
|
||||
|
||||
# cp arch/ia64/configs/xen_domu_wip_defconfig .config
|
||||
|
||||
4. make kernel with pv_ops::
|
||||
|
||||
# make oldconfig
|
||||
# make
|
||||
|
||||
5. install the kernel and initrd::
|
||||
|
||||
# cp vmlinux.gz /boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU
|
||||
# make modules_install
|
||||
# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img \
|
||||
2.6.26-rc3xen-ia64-08941-g1b12161 --builtin mptspi \
|
||||
--builtin mptbase --builtin mptscsih --builtin uhci-hcd \
|
||||
--builtin ohci-hcd --builtin ehci-hcd
|
||||
|
||||
Boot DomainU with pv_ops
|
||||
========================
|
||||
|
||||
1. make config of DomU::
|
||||
|
||||
# vi /etc/xen/rhel5
|
||||
kernel = "/boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU"
|
||||
ramdisk = "/boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img"
|
||||
vcpus = 1
|
||||
memory = 512
|
||||
name = "rhel5"
|
||||
disk = [ 'file:/root/rhel5.img,xvda1,w' ]
|
||||
root = "/dev/xvda1 ro"
|
||||
extra= "rhgb console=hvc0"
|
||||
|
||||
2. After boot xen and dom0, start xend::
|
||||
|
||||
# /etc/init.d/xend start
|
||||
|
||||
( In the debugging case, `# XEND_DEBUG=1 xend trace_start` )
|
||||
|
||||
3. start domU::
|
||||
|
||||
# xm create -c rhel5
|
||||
|
||||
Reference
|
||||
=========
|
||||
- Wiki of Xen/IA64 upstream merge
|
||||
http://wiki.xensource.com/xenwiki/XenIA64/UpstreamMerge
|
||||
|
||||
Written by Akio Takebe <takebe_akio@jp.fujitsu.com> on 28 May 2008
|
||||
@ -1,183 +0,0 @@
|
||||
Recipe for getting/building/running Xen/ia64 with pv_ops
|
||||
--------------------------------------------------------
|
||||
|
||||
This recipe describes how to get xen-ia64 source and build it,
|
||||
and run domU with pv_ops.
|
||||
|
||||
============
|
||||
Requirements
|
||||
============
|
||||
|
||||
- python
|
||||
- mercurial
|
||||
it (aka "hg") is an open-source source code
|
||||
management software. See the below.
|
||||
http://www.selenic.com/mercurial/wiki/
|
||||
- git
|
||||
- bridge-utils
|
||||
|
||||
=================================
|
||||
Getting and Building Xen and Dom0
|
||||
=================================
|
||||
|
||||
My environment is;
|
||||
Machine : Tiger4
|
||||
Domain0 OS : RHEL5
|
||||
DomainU OS : RHEL5
|
||||
|
||||
1. Download source
|
||||
# hg clone http://xenbits.xensource.com/ext/ia64/xen-unstable.hg
|
||||
# cd xen-unstable.hg
|
||||
# hg clone http://xenbits.xensource.com/ext/ia64/linux-2.6.18-xen.hg
|
||||
|
||||
2. # make world
|
||||
|
||||
3. # make install-tools
|
||||
|
||||
4. copy kernels and xen
|
||||
# cp xen/xen.gz /boot/efi/efi/redhat/
|
||||
# cp build-linux-2.6.18-xen_ia64/vmlinux.gz \
|
||||
/boot/efi/efi/redhat/vmlinuz-2.6.18.8-xen
|
||||
|
||||
5. make initrd for Dom0/DomU
|
||||
# make -C linux-2.6.18-xen.hg ARCH=ia64 modules_install \
|
||||
O=$(pwd)/build-linux-2.6.18-xen_ia64
|
||||
# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6.18.8-xen.img \
|
||||
2.6.18.8-xen --builtin mptspi --builtin mptbase \
|
||||
--builtin mptscsih --builtin uhci-hcd --builtin ohci-hcd \
|
||||
--builtin ehci-hcd
|
||||
|
||||
================================
|
||||
Making a disk image for guest OS
|
||||
================================
|
||||
|
||||
1. make file
|
||||
# dd if=/dev/zero of=/root/rhel5.img bs=1M seek=4096 count=0
|
||||
# mke2fs -F -j /root/rhel5.img
|
||||
# mount -o loop /root/rhel5.img /mnt
|
||||
# cp -ax /{dev,var,etc,usr,bin,sbin,lib} /mnt
|
||||
# mkdir /mnt/{root,proc,sys,home,tmp}
|
||||
|
||||
Note: You may miss some device files. If so, please create them
|
||||
with mknod. Or you can use tar instead of cp.
|
||||
|
||||
2. modify DomU's fstab
|
||||
# vi /mnt/etc/fstab
|
||||
/dev/xvda1 / ext3 defaults 1 1
|
||||
none /dev/pts devpts gid=5,mode=620 0 0
|
||||
none /dev/shm tmpfs defaults 0 0
|
||||
none /proc proc defaults 0 0
|
||||
none /sys sysfs defaults 0 0
|
||||
|
||||
3. modify inittab
|
||||
set runlevel to 3 to avoid X trying to start
|
||||
# vi /mnt/etc/inittab
|
||||
id:3:initdefault:
|
||||
Start a getty on the hvc0 console
|
||||
X0:2345:respawn:/sbin/mingetty hvc0
|
||||
tty1-6 mingetty can be commented out
|
||||
|
||||
4. add hvc0 into /etc/securetty
|
||||
# vi /mnt/etc/securetty (add hvc0)
|
||||
|
||||
5. umount
|
||||
# umount /mnt
|
||||
|
||||
FYI, virt-manager can also make a disk image for guest OS.
|
||||
It's GUI tools and easy to make it.
|
||||
|
||||
==================
|
||||
Boot Xen & Domain0
|
||||
==================
|
||||
|
||||
1. replace elilo
|
||||
elilo of RHEL5 can boot Xen and Dom0.
|
||||
If you use old elilo (e.g RHEL4), please download from the below
|
||||
http://elilo.sourceforge.net/cgi-bin/blosxom
|
||||
and copy into /boot/efi/efi/redhat/
|
||||
# cp elilo-3.6-ia64.efi /boot/efi/efi/redhat/elilo.efi
|
||||
|
||||
2. modify elilo.conf (like the below)
|
||||
# vi /boot/efi/efi/redhat/elilo.conf
|
||||
prompt
|
||||
timeout=20
|
||||
default=xen
|
||||
relocatable
|
||||
|
||||
image=vmlinuz-2.6.18.8-xen
|
||||
label=xen
|
||||
vmm=xen.gz
|
||||
initrd=initrd-2.6.18.8-xen.img
|
||||
read-only
|
||||
append=" -- rhgb root=/dev/sda2"
|
||||
|
||||
The append options before "--" are for xen hypervisor,
|
||||
the options after "--" are for dom0.
|
||||
|
||||
FYI, your machine may need console options like
|
||||
"com1=19200,8n1 console=vga,com1". For example,
|
||||
append="com1=19200,8n1 console=vga,com1 -- rhgb console=tty0 \
|
||||
console=ttyS0 root=/dev/sda2"
|
||||
|
||||
=====================================
|
||||
Getting and Building domU with pv_ops
|
||||
=====================================
|
||||
|
||||
1. get pv_ops tree
|
||||
# git clone http://people.valinux.co.jp/~yamahata/xen-ia64/linux-2.6-xen-ia64.git/
|
||||
|
||||
2. git branch (if necessary)
|
||||
# cd linux-2.6-xen-ia64/
|
||||
# git checkout -b your_branch origin/xen-ia64-domu-minimal-2008may19
|
||||
(Note: The current branch is xen-ia64-domu-minimal-2008may19.
|
||||
But you would find the new branch. You can see with
|
||||
"git branch -r" to get the branch lists.
|
||||
http://people.valinux.co.jp/~yamahata/xen-ia64/for_eagl/linux-2.6-ia64-pv-ops.git/
|
||||
is also available. The tree is based on
|
||||
git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 test)
|
||||
|
||||
|
||||
3. copy .config for pv_ops of domU
|
||||
# cp arch/ia64/configs/xen_domu_wip_defconfig .config
|
||||
|
||||
4. make kernel with pv_ops
|
||||
# make oldconfig
|
||||
# make
|
||||
|
||||
5. install the kernel and initrd
|
||||
# cp vmlinux.gz /boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU
|
||||
# make modules_install
|
||||
# mkinitrd -f /boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img \
|
||||
2.6.26-rc3xen-ia64-08941-g1b12161 --builtin mptspi \
|
||||
--builtin mptbase --builtin mptscsih --builtin uhci-hcd \
|
||||
--builtin ohci-hcd --builtin ehci-hcd
|
||||
|
||||
========================
|
||||
Boot DomainU with pv_ops
|
||||
========================
|
||||
|
||||
1. make config of DomU
|
||||
# vi /etc/xen/rhel5
|
||||
kernel = "/boot/efi/efi/redhat/vmlinuz-2.6-pv_ops-xenU"
|
||||
ramdisk = "/boot/efi/efi/redhat/initrd-2.6-pv_ops-xenU.img"
|
||||
vcpus = 1
|
||||
memory = 512
|
||||
name = "rhel5"
|
||||
disk = [ 'file:/root/rhel5.img,xvda1,w' ]
|
||||
root = "/dev/xvda1 ro"
|
||||
extra= "rhgb console=hvc0"
|
||||
|
||||
2. After boot xen and dom0, start xend
|
||||
# /etc/init.d/xend start
|
||||
( In the debugging case, # XEND_DEBUG=1 xend trace_start )
|
||||
|
||||
3. start domU
|
||||
# xm create -c rhel5
|
||||
|
||||
=========
|
||||
Reference
|
||||
=========
|
||||
- Wiki of Xen/IA64 upstream merge
|
||||
http://wiki.xensource.com/xenwiki/XenIA64/UpstreamMerge
|
||||
|
||||
Written by Akio Takebe <takebe_akio@jp.fujitsu.com> on 28 May 2008
|
||||
@ -14389,7 +14389,7 @@ SGI SN-IA64 (Altix) SERIAL CONSOLE DRIVER
|
||||
M: Pat Gefre <pfg@sgi.com>
|
||||
L: linux-ia64@vger.kernel.org
|
||||
S: Supported
|
||||
F: Documentation/ia64/serial.txt
|
||||
F: Documentation/ia64/serial.rst
|
||||
F: drivers/tty/serial/ioc?_serial.c
|
||||
F: include/linux/ioc?.h
|
||||
|
||||
|
||||
@ -852,7 +852,7 @@ valid_phys_addr_range (phys_addr_t phys_addr, unsigned long size)
|
||||
* /dev/mem reads and writes use copy_to_user(), which implicitly
|
||||
* uses a granule-sized kernel identity mapping. It's really
|
||||
* only safe to do this for regions in kern_memmap. For more
|
||||
* details, see Documentation/ia64/aliasing.txt.
|
||||
* details, see Documentation/ia64/aliasing.rst.
|
||||
*/
|
||||
attr = kern_mem_attribute(phys_addr, size);
|
||||
if (attr & EFI_MEMORY_WB || attr & EFI_MEMORY_UC)
|
||||
|
||||
@ -28,7 +28,7 @@
|
||||
#include <asm/native/inst.h>
|
||||
|
||||
/*
|
||||
* See Documentation/ia64/fsys.txt for details on fsyscalls.
|
||||
* See Documentation/ia64/fsys.rst for details on fsyscalls.
|
||||
*
|
||||
* On entry to an fsyscall handler:
|
||||
* r10 = 0 (i.e., defaults to "successful syscall return")
|
||||
|
||||
@ -42,7 +42,7 @@ ioremap (unsigned long phys_addr, unsigned long size)
|
||||
/*
|
||||
* For things in kern_memmap, we must use the same attribute
|
||||
* as the rest of the kernel. For more details, see
|
||||
* Documentation/ia64/aliasing.txt.
|
||||
* Documentation/ia64/aliasing.rst.
|
||||
*/
|
||||
attr = kern_mem_attribute(phys_addr, size);
|
||||
if (attr & EFI_MEMORY_WB)
|
||||
|
||||
@ -450,7 +450,7 @@ pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,
|
||||
return -ENOSYS;
|
||||
|
||||
/*
|
||||
* Avoid attribute aliasing. See Documentation/ia64/aliasing.txt
|
||||
* Avoid attribute aliasing. See Documentation/ia64/aliasing.rst
|
||||
* for more details.
|
||||
*/
|
||||
if (!valid_mmap_phys_addr_range(vma->vm_pgoff, size))
|
||||
|
||||
Loading…
Reference in New Issue
Block a user