openslx-ng/ipxe.git/src/arch/arm, branch openslx

[efi] Centralise definition of efi_cpu_nap()

2024-09-13T13:38:23+00:00

Define a cpu_halt() function which is architecture-specific but platform-independent, and merge the multiple architecture-specific implementations of the EFI cpu_nap() function into a single central efi_cpu_nap() that uses cpu_halt() if applicable. Signed-off-by: Michael Brown

[build] Centralise dummy architecture-specific headers

2024-09-03T16:32:26+00:00

Simplify the process of adding a new CPU architecture by providing common implementations of typically empty architecture-specific header files. Signed-off-by: Michael Brown

[mp] Define an API for multiprocessor functions

2024-03-15T13:26:53+00:00

Define an API for executing very limited functions on application processors in a multiprocessor system, along with an x86-only implementation. The normal iPXE runtime environment is effectively non-existent on application processors. There is no ability to make firmware calls (e.g. to write to a console), and there may be no stack space available. Signed-off-by: Michael Brown

[efi] Fix hang during ExitBootServices()

2024-01-31T13:23:56+00:00

When ExitBootServices() invokes efi_shutdown_hook(), there may be nothing to generate an interrupt since the timer is disabled in the first step of ExitBootServices(). Additionally, for VMs OVMF masks everything from the PIC (except the timer) by default. This means that calling cpu_nap() may hang indefinitely. This was seen in practice in netfront_reset() when running in a VM on XenServer. Fix this by skipping the halt if an EFI shutdown is in progress. Signed-off-by: Ross Lagerwall Modified-by: Michael Brown Signed-off-by: Michael Brown

[ioapi] Centralise definitions for dummy PIO

2023-06-29T14:40:24+00:00

There is no common standard for I/O-space access for non-x86 CPU families, and non-MMIO peripherals are vanishingly rare. Generalise the existing ARM definitions for dummy PIO to allow for reuse by other CPU architectures. Signed-off-by: Michael Brown

[arm] Add missing arch/arm/core source directory

2023-06-29T14:40:24+00:00

Signed-off-by: Michael Brown

[arm] Remove redundant inclusion of io.h

2023-06-29T14:40:24+00:00

The PCI I/O API (supporting accesses to PCI configuration space) is not related to the general I/O API (supporting accesses to memory-mapped I/O peripherals). Remove the spurious inclusion of ipxe/io.h from the PCI I/O header. Signed-off-by: Michael Brown

[rng] Allow entropy source to be selected at runtime

2023-02-17T21:29:51+00:00

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

[ioapi] Move PAGE_SHIFT to bits/io.h

2023-02-06T12:34:21+00:00

The PAGE_SHIFT definition is an architectural property, rather than an aspect of a particular I/O API implementation (of which, in theory, there may be more than one per architecture). Reflect this by moving the definition to the top-level bits/io.h for each architecture. Signed-off-by: Michael Brown

[arm] Support building as a Linux userspace binary for AArch64

2023-01-22T20:36:57+00:00

Add support for building as a Linux userspace binary for AArch64. This allows the self-test suite to be more easily run for the 64-bit ARM code. For example: # On a native AArch64 system: # make bin-arm64-efi/tests.linux && ./bin-arm64-efi/tests.linux # On a non-AArch64 system (e.g. x86_64) via cross-compilation, # assuming that kernel and glibc headers are present within # /usr/aarch64-linux-gnu/sys-root/: # make bin-arm64-linux/tests.linux CROSS=aarch64-linux-gnu- && \ qemu-aarch64 -L /usr/aarch64-linux-gnu/sys-root/ \ ./bin-arm64-linux/tests.linux Signed-off-by: Michael Brown