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* [uaccess] Remove redundant virt_to_user() and userptr_tMichael Brown2025-04-301-1/+0Star
| | | | | | | | | Remove the last remaining traces of the concept of a user pointer, leaving iPXE with a simpler and cleaner memory model that implicitly assumes that all memory locations can be reached through pointer dereferences. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add missing return statement to linux_poll()Michael Brown2025-04-281-0/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove now-obsolete memchr_user()Michael Brown2025-04-241-1/+0Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove trivial uses of userptr_tMichael Brown2025-04-243-3/+5
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [umalloc] Remove userptr_t from user memory allocationsMichael Brown2025-04-231-20/+11Star
| | | | | | | | Use standard void pointers for umalloc(), urealloc(), and ufree(), with the "u" prefix retained to indicate that these allocations are made from external ("user") memory rather than from the internal heap. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [smbios] Remove userptr_t from SMBIOS structure parsingMichael Brown2025-04-231-2/+4
| | | | | | | | | | | | | Simplify the SMBIOS structure parsing code by assuming that all structure content is fully accessible via pointer dereferences. In particular, this allows the convoluted find_smbios_structure() and read_smbios_structure() to be combined into a single function smbios_structure() that just returns a direct pointer to the SMBIOS structure, with smbios_string() similarly now returning a direct pointer to the relevant string. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [acpi] Remove userptr_t from ACPI table parsingMichael Brown2025-04-221-4/+5
| | | | | | | Simplify the ACPI table parsing code by assuming that all table content is fully accessible via pointer dereferences. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove user_to_phys() and phys_to_user()Michael Brown2025-04-211-1/+2
| | | | | | | | Remove the intermediate concept of a user pointer from physical address conversions, leaving virt_to_phys() and phys_to_virt() as the directly implemented functions. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove redundant user_to_virt()Michael Brown2025-04-214-5/+3Star
| | | | | | | | | The user_to_virt() function is now a straightforward wrapper around addition, with the addend almost invariably being zero. Remove this redundant wrapper. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove redundant memcpy_user() and related string functionsMichael Brown2025-04-211-4/+0Star
| | | | | | | | | | The memcpy_user(), memmove_user(), memcmp_user(), memset_user(), and strlen_user() functions are now just straightforward wrappers around the corresponding standard library functions. Remove these redundant wrappers. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [uaccess] Remove redundant userptr_add() and userptr_diff()Michael Brown2025-04-201-1/+0Star
| | | | | | | | | The userptr_add() and userptr_diff() functions are now just straightforward wrappers around addition and subtraction. Remove these redundant wrappers. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [pci] Separate permission to probe buses from bus:dev.fn range discoveryMichael Brown2024-08-151-0/+1
| | | | | | | | | | | | | | | | | The UEFI device model requires us to not probe the PCI bus directly, but instead to wait to be offered the opportunity to drive devices via our driver service binding handle. We currently inhibit PCI bus probing by having pci_discover() return an empty range when using the EFI PCI I/O API. This has the unwanted side effect that scanning the bus manually using the "pciscan" command will also fail to discover any devices. Separate out the concept of being allowed to probe PCI buses from the mechanism for discovering PCI bus:dev.fn address ranges, so that this limitation may be removed. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [rng] Allow entropy source to be selected at runtimeMichael Brown2023-02-171-4/+16
| | | | | | | | | | | | | | | | | | | | | | | | As noted in commit 3c83843 ("[rng] Check for several functioning RTC interrupts"), experimentation shows that Hyper-V cannot be trusted to reliably generate RTC interrupts. (As noted in commit f3ba0fb ("[hyperv] Provide timer based on the 10MHz time reference count MSR"), Hyper-V appears to suffer from a general problem in reliably generating any legacy interrupts.) An alternative entropy source is therefore required for an image that may be used in a Hyper-V Gen1 virtual machine. The x86 RDRAND instruction provides a suitable alternative entropy source, but may not be supported by all CPUs. We must therefore allow for multiple entropy sources to be compiled in, with the single active entropy source selected only at runtime. Restructure the internal entropy API to allow a working entropy source to be detected and chosen at runtime. Enable the RDRAND entropy source for all x86 builds, since it is likely to be substantially faster than any other source. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [pci] Generalise pci_num_bus() to pci_discover()Michael Brown2022-09-151-1/+1
| | | | | | | | | | Allow pci_find_next() to discover devices beyond the first PCI segment, by generalising pci_num_bus() (which implicitly assumes that there is only a single PCI segment) with pci_discover() (which has the ability to return an arbitrary contiguous chunk of PCI bus:dev.fn address space). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add missing PROVIDE_PCIAPI_INLINE() macrosMichael Brown2022-09-151-0/+9
| | | | | | | Ensure type consistency of the PCI I/O API methods by adding the missing PROVIDE_PCIAPI_INLINE() macros. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Fail at link time if building slirp.linux without libslirpMichael Brown2021-03-111-29/+3Star
| | | | | | | | | | | | | | | | | | | | The iPXE build system is constructed for a standalone codebase with no external dependencies, and does not have any equivalent of the standard userspace ./configure script. We currently check for the ability to include slirp/libslirp.h and conditionalise portions of linux_api.c on its presence. The actual slirp driver code is built unconditionally, as with all iPXE drivers. This currently leads to a silent runtime failure if attempting to use slirp.linux built on a system that was missing slirp/libslirp.h. Convert this to a link-time failure by deliberately omitting the relevant symbols from linux_api.c when slirp/libslirp.h is not present. This allows other builds (e.g. tap.linux or tests.linux) to succeed: the link-time failure will occur only if the slirp driver is included within the build target. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Do not assume that stat() works on sysfs filesMichael Brown2021-03-031-29/+20Star
| | | | | | | | Linux kernel 3.12 and earlier report a zero size via stat() for all ACPI table files in sysfs. There is no way to determine the file size other than by reading the file until EOF. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Validate length of ACPI table read from sysfsMichael Brown2021-03-031-0/+10
| | | | | | | | | | | | | Consumers of acpi_find() will assume that returned structures include a valid table header and that the length in the table header is correct. These assumptions are necessary when dealing with raw ACPI tables, since there exists no independent source of length information. Ensure that these assumptions are also valid for ACPI tables read from sysfs. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Use fstat() rather than statx()Michael Brown2021-03-032-8/+7Star
| | | | | | | | | | | | The statx() system call has a clean header file and a consistent layout, but was unfortunately added only in kernel 4.11. Using stat() or fstat() directly is extremely messy since glibc does not necessarily use the kernel native data structures. However, as the only current use case is to obtain the length of an open file, we can merely provide a wrapper that does precisely this. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Use generic sysfs mechanism to read SMBIOS tableMichael Brown2021-03-031-64/+76
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Use generic sysfs mechanism to read ACPI tablesMichael Brown2021-03-031-78/+21Star
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add a generic function for reading files from sysfsMichael Brown2021-03-032-0/+123
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Free cached ACPI tables on shutdownMichael Brown2021-03-031-0/+22
| | | | | | | Free any cached ACPI tables for the sake of neatness (and a clean report from Valgrind). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [build] Fix building on older versions of gccMichael Brown2021-03-021-0/+3
| | | | | | | | Versions of gcc prior to 9.1 do not support the single-argument form of static_assert(). Fix by unconditionally defining a compatibility macro for the single file that uses this. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [slirp] Add libslirp driver for LinuxMichael Brown2021-03-021-0/+158
| | | | | | | | | | | | | | | | | | | Add a driver using libslirp to provide a virtual network interface without requiring root permissions on the host. This simplifies the process of running iPXE as a Linux userspace application with network access. For example: make bin-x86_64-linux/slirp.linux ./bin-x86_64-linux/slirp.linux --net slirp libslirp will provide a built-in emulated DHCP server and NAT router. Settings such as the boot filename may be controlled via command-line options. For example: ./bin-x86_64-linux/slirp.linux \ --net slirp,filename=http://192.168.0.1/boot.ipxe Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Provide ACPI settings via /sys/firmware/acpi/tablesMichael Brown2021-03-011-0/+173
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Use host glibc system call wrappersMichael Brown2021-03-0110-8/+419
| | | | | | | | | | | | | | | | | | | | | | When building as a Linux userspace application, iPXE currently implements its own system calls to the host kernel rather than relying on the host's C library. The output binary is statically linked and has no external dependencies. This matches the general philosophy of other platforms on which iPXE runs, since there are no external libraries available on either BIOS or UEFI bare metal. However, it would be useful for the Linux userspace application to be able to link against host libraries such as libslirp. Modify the build process to perform a two-stage link: first picking out the requested objects in the usual way from blib.a but with relocations left present, then linking again with a helper object to create a standard hosted application. The helper object provides the standard main() entry point and wrappers for the Linux system calls required by the iPXE Linux drivers and interface code. Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [init] Show startup and shutdown function names in debug messagesMichael Brown2019-01-251-0/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [time] Allow timer to be selected at runtimeMichael Brown2017-01-261-16/+10Star
| | | | | | | | | | | | | | | | | | | | | | Allow the active timer (providing udelay() and currticks()) to be selected at runtime based on probing during the INIT_EARLY stage of initialisation. TICKS_PER_SEC is now a fixed compile-time constant for all builds, and is independent of the underlying clock tick rate. We choose the value 1024 to allow multiplications and divisions on seconds to be converted to bit shifts. TICKS_PER_MS is defined as 1, allowing multiplications and divisions on milliseconds to be omitted entirely. The 2% inaccuracy in this definition is negligible when using the standard BIOS timer (running at around 18.2Hz). TIMER_RDTSC now checks for a constant TSC before claiming to be a usable timer. (This timer can be tested in KVM via the command-line option "-cpu host,+invtsc".) Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Rewrite headers included in all buildsMichael Brown2015-03-051-1/+0Star
| | | | | | | Rewrite (and relicense) the header files which are included in all builds of iPXE (including non-Linux builds). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Relicense files under GPL2_OR_LATER_OR_UBDLMichael Brown2015-03-023-3/+15
| | | | | | | Relicense files for which I am the sole author (as identified by util/relicense.pl). Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Avoid starting currticks() from zero every timeMichael Brown2014-03-071-1/+7
| | | | | | | | | | | | | | | | | | | iPXE uses currticks() (along with the MAC address(es) of any network devices) to seed the (non-cryptographic) random number generator. The current implementation of linux_currticks() ensures that the first call to currticks() will always return zero; this results in identical random number sequences on each run of iPXE on a given machine. This can cause odd-looking behaviour due to e.g. the reuse of local TCP port numbers. Fix by effectively rounding down the start time recorded by linux_currticks() to the nearest whole second; this makes it unlikely that consecutive runs of iPXE will use the exact same RNG sequence. (Note that none of this affects the cryptographic RNG, which uses /dev/random as a source of entropy.) Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Provide access to SMBIOS via /dev/memMichael Brown2013-12-051-9/+87
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add missing #include <stddef.h>Marin Hannache2013-07-142-0/+2
| | | | | Signed-off-by: Marin Hannache <git@mareo.fr> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add support for accessing PCI configuration space via /proc/bus/pciMichael Brown2013-07-131-0/+185
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [legal] Update FSF mailing address in GPL licence textsMichael Brown2012-07-203-3/+6
| | | | | Suggested-by: Daniel P. Berrange <berrange@redhat.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [time] Add Linux time source using gettimeofday()Michael Brown2012-05-041-0/+45
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [console] Remove "log message" usage from interactive console defaultsMichael Brown2012-03-271-1/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [console] Allow usage to be defined independently for each consoleMichael Brown2012-03-261-0/+9
| | | | | | | | | | | | | | | | | | | | | Add the concept of a "console usage", such as "standard output" or "debug messages". Allow usages to be associated with each console independently. For example, to send debugging output via the serial port, while preventing it from appearing on the local console: #define CONSOLE_SERIAL CONSOLE_USAGE_ALL #define CONSOLE_PCBIOS ( CONSOLE_USAGE_ALL & ~CONSOLE_USAGE_DEBUG ) If no usages are explicitly specified, then a default set of usages will be applied. For example: #define CONSOLE_SERIAL will have the same affect as #define CONSOLE_SERIAL CONSOLE_USAGE_ALL Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [rng] Add Linux entropy source using /dev/randomMichael Brown2012-03-181-0/+96
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Make malloc and linux_umalloc valgrindablePiotr Jaroszyński2011-03-271-3/+31
| | | | | | | | | | Make the allocators used by malloc and linux_umalloc valgrindable. Include valgrind headers in the codebase to avoid a build dependency on valgrind. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Modified-by: Michael Brown <mcb30@ipxe.org> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [console] Move include/console.h to include/ipxe/console.hMichael Brown2011-03-091-1/+1
| | | | Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add empty smbiosPiotr Jaroszyński2010-08-191-0/+37
| | | | | | | | | There exists an smbios userspace library so implementing this is probably possible, but doesn't seem really important to have in userspace. Hence provide a dummy implementation returning an error. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add napPiotr Jaroszyński2010-08-191-0/+40
| | | | | Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add umallocPiotr Jaroszyński2010-08-191-0/+126
| | | | | | | Add umalloc API. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add uaccessPiotr Jaroszyński2010-08-191-0/+38
| | | | | | | | | | | | | | | Add user access API for linux. On linux userspace virtual == user == phys addresses. Physical addresses also being the same is wrong, but there is no general way of converting userspace addresses to physical as what appears to be contiguous in userspace is physically fragmented. Currently only the DMA memory is special-cased, but its conversion to bus addresses is done in phys_to_bus. This is known to break virtio as it is passing phys addresses to the virtual device. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add timerPiotr Jaroszyński2010-08-191-0/+80
| | | | | | | Add linux timer API. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
* [linux] Add consolePiotr Jaroszyński2010-08-191-0/+146
Add linux console using stdin/out. Configure the attached terminal for readline use. Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com> Signed-off-by: Michael Brown <mcb30@ipxe.org>
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