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docs: ia64: convert to ReST

Browse Source 
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 2019-04-18 10:10:33 -03:00
parent c3123552aa
commit db9a0975a2
16 changed files with 660 additions and 527 deletions
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69
Documentation/ia64/aliasing.txt → Documentation/ia64/aliasing.rst
View File

@ -1,20 +1,25 @@
MEMORY ATTRIBUTE ALIASING ON IA-64
==================================
Memory Attribute Aliasing on IA-64
==================================
Bjorn Helgaas
<bjorn.helgaas@hp.com>
May 4, 2006
Bjorn Helgaas <bjorn.helgaas@hp.com>
May 4, 2006
MEMORY ATTRIBUTES
Memory Attributes
=================
Itanium supports several attributes for virtual memory references.
The attribute is part of the virtual translation, i.e., it is
contained in the TLB entry. The ones of most interest to the Linux
kernel are:
== ======================
WB Write-back (cacheable)
UC Uncacheable
WC Write-coalescing
== ======================
System memory typically uses the WB attribute. The UC attribute is
used for memory-mapped I/O devices. The WC attribute is uncacheable
@ -29,7 +34,8 @@ MEMORY ATTRIBUTES
support either WB or UC access to main memory, while others support
only WB access.
MEMORY MAP
Memory Map
==========
Platform firmware describes the physical memory map and the
supported attributes for each region. At boot-time, the kernel uses
@ -55,7 +61,8 @@ MEMORY MAP
The efi_memmap table is preserved unmodified because the original
boot-time information is required for kexec.
KERNEL IDENTITY MAPPINGS
Kernel Identify Mappings
========================
Linux/ia64 identity mappings are done with large pages, currently
either 16MB or 64MB, referred to as "granules." Cacheable mappings
@ -74,17 +81,20 @@ KERNEL IDENTITY MAPPINGS
are only partially populated, or populated with a combination of UC
and WB regions.
USER MAPPINGS
User Mappings
=============
User mappings are typically done with 16K or 64K pages. The smaller
page size allows more flexibility because only 16K or 64K has to be
homogeneous with respect to memory attributes.
POTENTIAL ATTRIBUTE ALIASING CASES
Potential Attribute Aliasing Cases
==================================
There are several ways the kernel creates new mappings:
mmap of /dev/mem
mmap of /dev/mem
----------------
This uses remap_pfn_range(), which creates user mappings. These
mappings may be either WB or UC. If the region being mapped
@ -98,7 +108,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
Since the EFI memory map does not describe MMIO on some
machines, this should use an uncacheable mapping as a fallback.
mmap of /sys/class/pci_bus/.../legacy_mem
mmap of /sys/class/pci_bus/.../legacy_mem
-----------------------------------------
This is very similar to mmap of /dev/mem, except that legacy_mem
only allows mmap of the one megabyte "legacy MMIO" area for a
@ -112,7 +123,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
The /dev/mem mmap constraints apply.
mmap of /proc/bus/pci/.../??.?
mmap of /proc/bus/pci/.../??.?
------------------------------
This is an MMIO mmap of PCI functions, which additionally may or
may not be requested as using the WC attribute.
@ -124,7 +136,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
Otherwise, the user mapping must use the same attribute as the
kernel mapping.
read/write of /dev/mem
read/write of /dev/mem
----------------------
This uses copy_from_user(), which implicitly uses a kernel
identity mapping. This is obviously safe for things in
@ -138,7 +151,8 @@ POTENTIAL ATTRIBUTE ALIASING CASES
eight-byte accesses, and the copy_from_user() path doesn't allow
any control over the access size, so this would be dangerous.
ioremap()
ioremap()
---------
This returns a mapping for use inside the kernel.
@ -155,9 +169,11 @@ POTENTIAL ATTRIBUTE ALIASING CASES
Failing all of the above, we have to fall back to a UC mapping.
PAST PROBLEM CASES
Past Problem Cases
==================
mmap of various MMIO regions from /dev/mem by "X" on Intel platforms
mmap of various MMIO regions from /dev/mem by "X" on Intel platforms
--------------------------------------------------------------------
The EFI memory map may not report these MMIO regions.
@ -166,12 +182,16 @@ PAST PROBLEM CASES
succeed. It may create either WB or UC user mappings, depending
on whether the region is in kern_memmap or the EFI memory map.
mmap of 0x0-0x9FFFF /dev/mem by "hwinfo" on HP sx1000 with VGA enabled
mmap of 0x0-0x9FFFF /dev/mem by "hwinfo" on HP sx1000 with VGA enabled
----------------------------------------------------------------------
The EFI memory map reports the following attributes:
=============== ======= ==================
0x00000-0x9FFFF WB only
0xA0000-0xBFFFF UC only (VGA frame buffer)
0xC0000-0xFFFFF WB only
=============== ======= ==================
This mmap is done with user pages, not kernel identity mappings,
so it is safe to use WB mappings.
@ -182,7 +202,8 @@ PAST PROBLEM CASES
never generate an uncacheable reference to the WB-only areas unless
the driver explicitly touches them.
mmap of 0x0-0xFFFFF legacy_mem by "X"
mmap of 0x0-0xFFFFF legacy_mem by "X"
-------------------------------------
If the EFI memory map reports that the entire range supports the
same attributes, we can allow the mmap (and we will prefer WB if
@ -197,15 +218,18 @@ PAST PROBLEM CASES
that doesn't report the VGA frame buffer at all), we should fail the
mmap and force the user to map just the specific region of interest.
mmap of 0xA0000-0xBFFFF legacy_mem by "X" on HP sx1000 with VGA disabled
mmap of 0xA0000-0xBFFFF legacy_mem by "X" on HP sx1000 with VGA disabled
------------------------------------------------------------------------
The EFI memory map reports the following attributes::
The EFI memory map reports the following attributes:
0x00000-0xFFFFF WB only (no VGA MMIO hole)
This is a special case of the previous case, and the mmap should
fail for the same reason as above.
read of /sys/devices/.../rom
read of /sys/devices/.../rom
----------------------------
For VGA devices, this may cause an ioremap() of 0xC0000. This
used to be done with a UC mapping, because the VGA frame buffer
@ -215,7 +239,8 @@ PAST PROBLEM CASES
We should use WB page table mappings to avoid covering the VGA
frame buffer.
NOTES
Notes
=====
[1] SDM rev 2.2, vol 2, sec 4.4.1.
[2] SDM rev 2.2, vol 2, sec 4.4.6.

58
Documentation/ia64/efirtc.txt → Documentation/ia64/efirtc.rst
View File

@ -1,9 +1,13 @@
==========================
EFI Real Time Clock driver
-------------------------------
==========================
S. Eranian <eranian@hpl.hp.com>
March 2000
I/ Introduction
1. Introduction
===============
This document describes the efirtc.c driver has provided for
the IA-64 platform.
@ -16,7 +20,8 @@ SetTime(), GetWakeupTime(), SetWakeupTime() which are all supported by this
driver. We describe those calls as well the design of the driver in the
following sections.
II/ Design Decisions
2. Design Decisions
===================
The original ideas was to provide a very simple driver to get access to,
at first, the time of day service. This is required in order to access, in a
@ -50,19 +55,24 @@ we have created the include/linux/rtc.h header file to contain only the
in include/linux/mc146818rtc.h.
III/ Time of day service
3. Time of day service
======================
The part of the driver gives access to the time of day service of EFI.
Two ioctl()s, compatible with the legacy RTC calls:
Read the CMOS clock: ioctl(d, RTC_RD_TIME, &rtc);
Read the CMOS clock::
Write the CMOS clock: ioctl(d, RTC_SET_TIME, &rtc);
ioctl(d, RTC_RD_TIME, &rtc);
Write the CMOS clock::
ioctl(d, RTC_SET_TIME, &rtc);
The rtc is a pointer to a data structure defined in rtc.h which is close
to a struct tm:
to a struct tm::
struct rtc_time {
struct rtc_time {
int tm_sec;
int tm_min;
int tm_hour;
@ -72,23 +82,26 @@ struct rtc_time {
int tm_wday;
int tm_yday;
int tm_isdst;
};
};
The driver takes care of converting back an forth between the EFI time and
this format.
Those two ioctl()s can be exercised with the hwclock command:
For reading:
# /sbin/hwclock --show
Mon Mar 6 15:32:32 2000 -0.910248 seconds
For reading::
For setting:
# /sbin/hwclock --systohc
# /sbin/hwclock --show
Mon Mar 6 15:32:32 2000 -0.910248 seconds
For setting::
# /sbin/hwclock --systohc
Root privileges are required to be able to set the time of day.
IV/ Wakeup Alarm service
4. Wakeup Alarm service
=======================
EFI provides an API by which one can program when a machine should wakeup,
i.e. reboot. This is very different from the alarm provided by the legacy
@ -98,22 +111,24 @@ introduced 2 news ioctl()s to the interface of an RTC.
We have added 2 new ioctl()s that are specific to the EFI driver:
Read the current state of the alarm
Read the current state of the alarm::
ioctl(d, RTC_WKLAM_RD, &wkt)
Set the alarm or change its status
Set the alarm or change its status::
ioctl(d, RTC_WKALM_SET, &wkt)
The wkt structure encapsulates a struct rtc_time + 2 extra fields to get
status information:
status information::
struct rtc_wkalrm {
struct rtc_wkalrm {
unsigned char enabled; /* =1 if alarm is enabled */
unsigned char pending; /* =1 if alarm is pending */
struct rtc_time time;
}
}
As of today, none of the existing user-level apps supports this feature.
However writing such a program should be hard by simply using those two
@ -121,7 +136,8 @@ ioctl().
Root privileges are required to be able to set the alarm.
V/ References.
5. References
=============
Checkout the following Web site for more information on EFI:

303
Documentation/ia64/err_inject.txt → Documentation/ia64/err_inject.rst
View File

@ -1,4 +1,4 @@
========================================
IPF Machine Check (MC) error inject tool
========================================
@ -32,40 +32,40 @@ Errata: Itanium 2 Processors Specification Update lists some errata against
the pal_mc_error_inject PAL procedure. The following err.conf has been tested
on latest Montecito PAL.
err.conf:
err.conf::
#This is configuration file for err_inject_tool.
#The format of the each line is:
#cpu, loop, interval, err_type_info, err_struct_info, err_data_buffer
#where
# cpu: logical cpu number the error will be inject in.
# loop: times the error will be injected.
# interval: In second. every so often one error is injected.
# err_type_info, err_struct_info: PAL parameters.
#
#Note: All values are hex w/o or w/ 0x prefix.
#This is configuration file for err_inject_tool.
#The format of the each line is:
#cpu, loop, interval, err_type_info, err_struct_info, err_data_buffer
#where
# cpu: logical cpu number the error will be inject in.
# loop: times the error will be injected.
# interval: In second. every so often one error is injected.
# err_type_info, err_struct_info: PAL parameters.
#
#Note: All values are hex w/o or w/ 0x prefix.
#On cpu2, inject only total 0x10 errors, interval 5 seconds
#corrected, data cache, hier-2, physical addr(assigned by tool code).
#working on Montecito latest PAL.
2, 10, 5, 4101, 95
#On cpu2, inject only total 0x10 errors, interval 5 seconds
#corrected, data cache, hier-2, physical addr(assigned by tool code).
#working on Montecito latest PAL.
2, 10, 5, 4101, 95
#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.
4, 10, 5, 4109, 95
#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.
4, 10, 5, 4109, 95
#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
#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
@ -85,41 +85,41 @@ err_injection_tool.c:
* 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>
#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);
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;
@ -407,10 +407,10 @@ int create_sem(int cpu)
}
return 0;
}
}
static int lock(int cpu)
{
static int lock(int cpu)
{
struct sembuf lock;
lock.sem_num = cpu;
@ -418,10 +418,10 @@ static int lock(int cpu)
semop(semid[cpu], &lock, 1);
return 0;
}
}
static int unlock(int cpu)
{
static int unlock(int cpu)
{
struct sembuf unlock;
unlock.sem_num = cpu;
@ -429,15 +429,15 @@ static int unlock(int cpu)
semop(semid[cpu], &unlock, 1);
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;
@ -1064,5 +1064,4 @@ int main(int argc, char **argv)
help();
return 0;
}
}

123
Documentation/ia64/fsys.txt → Documentation/ia64/fsys.rst
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@ -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)
========= ===============================================================
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

26
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@ -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
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@ -0,0 +1,18 @@
:orphan:
==================
IA-64 Architecture
==================
.. toctree::
:maxdepth: 1
ia64
aliasing
efirtc
err_inject
fsys
irq-redir
mca
serial
xen

31
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@ -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).

10
Documentation/ia64/mca.txt → Documentation/ia64/mca.rst
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@ -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

36
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@ -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
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@ -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

183
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@ -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

2
MAINTAINERS
View File

@ -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

2
arch/ia64/kernel/efi.c
View File

@ -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)

2
arch/ia64/kernel/fsys.S
View File

@ -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")

2
arch/ia64/mm/ioremap.c
View File

@ -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)

2
arch/ia64/pci/pci.c
View File

@ -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))