summaryrefslogtreecommitdiff
path: root/lib
AgeCommit message (Collapse)Author
2025-06-24lib: rpmi: Make RPMI drivers as non-experimentalRahul Pathak
As RPMI v1.0 specification is frozen, disable the experimental tag for such RPMI drivers. Signed-off-by: Rahul Pathak <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-24lib: utils: Add Implementation ID and Version as RPMI MPXY attributesRahul Pathak
The latest frozen RPMI spec has added Implementation ID and Implementation Version as message protocol specific mpxy attributes. Add support for these. Signed-off-by: Rahul Pathak <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-17lib: sbi_platform: Add platform specific pmp_set() and pmp_disable()Chao-ying Fu
Allow platforms to implement platform specific PMP setup and PMP disable functions which are called before actual PMP CSRs are configured. Also, implement pmp_set() and pmp_disable() for MIPS P8700. Signed-off-by: Chao-ying Fu <[email protected]> Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: sbi: dbtr: Fix update_triggers to match SBIJesse Taube
OpenSBI implements sbi_dbtr_update_trig as `sbi_dbtr_update_trig(unsigned long trig_idx_base, unsigned long trig_idx_mask)` yet SBI v3.0-rc7 Chapter 19. Debug Triggers Extension [0] declares it as `sbi_debug_update_triggers(unsigned long trig_count)` Change update_triggers to match SBI. [0] https://github.com/riscv-non-isa/riscv-sbi-doc/tree/v3.0-rc7/src/ext-debug-triggers.adoc Fixes: 97f234f15c96 ("lib: sbi: Introduce the SBI debug triggers extension support") Signed-off-by: Jesse Taube <[email protected]> Reviewed-by: Himanshu Chauhan <[email protected]> Tested-by: Charlie Jenkins <[email protected]> Reviewed-by: Charlie Jenkins <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: sbi: Optimize saddr mapping in sbi_dbtr.cXiang W
The original implementation mapped saddr individually for each entry. The updated code now maps saddr for all entries in a single operation. This change reduces the number of PMP (Physical Memory Protection) operations, improving efficiency and performance. Tested-by: Himanshu Chauhan <[email protected]> Reviewed-by: Himanshu Chauhan <[email protected]> Signed-off-by: Xiang W <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: sbi: dbtr: Fix shared memory layoutJesse Taube
The existing sbi_dbtr_shmem_entry has a size of 5 * XLEN with the final entry being idx. This is in contrast to the SBI v3.0-rc7 Chapter 19. Debug Triggers Extension [0] where idx and trig_state share the same offset (0) in shared memory, with a total size of 4 * XLEN for all the SBI calls. Replace struct with union to match memory layout described in SBI. [0] https://github.com/riscv-non-isa/riscv-sbi-doc/tree/v3.0-rc7/src/ext-debug-triggers.adoc Fixes: 97f234f15c96 ("lib: sbi: Introduce the SBI debug triggers extension support") Signed-off-by: Jesse Taube <[email protected]> Reviewed-by: Charlie Jenkins <[email protected]> Tested-by: Charlie Jenkins <[email protected]> Reviewed-by: Himanshu Chauhan <[email protected]> Tested-by: Himanshu Chauhan <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: utils: Fix fdt_parse_aclint_node() for non-contiguous hartidAnup Patel
Currently, the fdt_parse_aclint_node() does not handle non-contiguous hartid correctly and returns incorrect first_hartid and hart_count. This is because the for-loop in fdt_parse_aclint_node() skips a hartid for which hartindex is not available (aka corresponding CPU DT node is disabled). For example, on a platform with 4 HARTs (hartid 0, 1, 2, and 3) where CPU DT nodes with hartid 0 and 2 are disabled, the fdt_parse_aclint_node() returns first_hartid = 1 and hart_count = 3 which is incorrect. To address the above issue, drop the sbi_hartid_to_hartindex() check from the for-loop of fdt_parse_aclint_node(). Fixes: 5e90e54a1a53 ("lib: utils:Check that hartid is valid") Reported-by: Maria Mbaye <[email protected]> Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: sbi: Revert entry_count before doing hsm stop in hsm wait loopAnup Patel
Using hsm stop in hsm wait loop causes secondary harts to be stuck forever in OpenSBI on RISC-V platforms where HSM hart hotplug is available and all harts come-up at the same time during system power-on. For example, lets say we have two harts A and B on a RISC-V platform with HSM hart hotplug which come-up at the same time during system power-on. The hart A enters OpenSBI before hart B hence it becomes the primary (or cold-boot) hart whereas hart B becomes the secondary (or warm-boot) hart. The hart A follows the OpenSBI cold-boot path and registers hsm device before hart B enters OpenSBI. The hart B eventually enters OpenSBI and follows the OpenSBI warm-boot path so it will increment it's own entry_count before entering hsm wait loop where it sees hsm device and stops itself. Later as part of the Linux boot-up sequence, hart A issues SBI HSM start call to bring-up hart B but OpenSBI sees entry_count != init_count for hart B in sbi_hsm_hart_start() hence hsm_device_hart_start() is not called for hart B resulting in hart B stuck forever in OpenSBI. To fix the above issue, revert entry_count before doing hsm stop in hsm wait loop. Fixes: d844deadec94 ("lib: sbi: Use hsm stop for hsm wait") Signed-off-by: Anup Patel <[email protected]> Reviewed-by: Nick Hu <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-16lib: utils/irqchip: always parse msi information for each aplic deviceInochi Amaoto
OpenSBI only parses MSI information of the first next level subdomain for now, which makes the root domain misconfigured in some case: 1. the msi is not enabled on the first subdomain of the root domain, but other subdomains enable MSI. 2. the root domain is set as direct mode, but its subdomains enable MSI. So it is needed to parse all child of the root domain, Otherwise, the some non-root domains are broken. As the specification says, it is safe to parse the MSI information of all its subdomain and write the msiaddrcfg register of the non root domain as they are read only. Parse the aplic MSI information recursively for all aplic device. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Inochi Amaoto <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-15lib: sbi: fwft: Use only the provided PMLEN valueSamuel Holland
As of riscv-sbi-doc commit c7d3d1f7dcaa ("ext-fwft: use the provided value in fwft_set(POINTER_MASKING_PMLEN)"), the SBI implementation must use only the provided PMLEN value or else fail. It may not fall back to a larger PMLEN value. Signed-off-by: Samuel Holland <[email protected]> Reviewed-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-15lib: sbi: pmu: Remove MIP clearing from pmu_sse_enable()Clément Léger
Clearing MIP at that point means that we can probably lose a pending interrupt. This should not happen, remove MIP clearing from there. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Atish Patra <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-15lib: sbi: pmu: Add SSE register/unregister() callbacksClément Léger
As soon as the SSE event is registered, there is no reason not to delegate the interrupt. Split the PMU SSE enable/disable() callbacks by moving MIDELEG setting to register/unregister(). Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Atish Patra <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-06-14lib: utils: hsm: Do not fail on EALREADY in rpmi-hsm fixup.Ziang Wang
In case harts are divided into groups that use different rpmi-hsm channels in different mailboxes, the suspend state fixup function will return EALREADY on secondary entry, simply skip on this error. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Ziang Wang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: sbi: pmu: Return SBI_EINVAL if cidx_mask is 0James Raphael Tiovalen
Currently, when configuring a matching programmable HPM counter with Sscofpmf being present, cidx_base > 2, and cidx_mask == 0 to monitor either the CPU_CYCLES or INSTRUCTIONS hardware event, sbi_pmu_ctr_cfg_match will succeed but it will configure the corresponding fixed counter instead of the counter specified by the cidx_base parameter. During counter configuration, the following issues may arise: - If the SKIP_MATCH flag is set, an out-of-bounds memory read of the phs->active_events array would occur, which could lead to undefined behavior. - If the CLEAR_VALUE flag is set, the corresponding fixed counter will be reset, which could be considered unexpected behavior. - If the AUTO_START flag is set, pmu_ctr_start_hw will silently start the fixed counter, even though it has already started. From the supervisor's perspective, nothing has changed, which could be confusing. The supervisor will not see the SBI_ERR_ALREADY_STARTED error code since sbi_pmu_ctr_cfg_match does not return the error code of pmu_ctr_start_hw. The only way to detect these issues is to check the ctr_idx return value of sbi_pmu_ctr_cfg_match and compare it with cidx_base. Fix these issues by returning the SBI_ERR_INVALID_PARAM error code if the cidx_mask parameter value being passed in is 0 since an invalid parameter should not lead to a successful sbi_pmu_ctr_cfg_match but with unexpected side effects. Following a similar rationale, add the validation check to sbi_pmu_ctr_start and sbi_pmu_ctr_stop as well since sbi_fls is undefined when the mask is 0. This also aligns OpenSBI's behavior with KVM's. Signed-off-by: James Raphael Tiovalen <[email protected]> Reviewed-by: Atish Patra <[email protected]> Reviewed-by: Andrew Jones <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20include: sbi: Change SBI spec version to 3.0Anup Patel
Now that SBI v3.0 specification is frozen, change runtime SBI version implemented by OpenSBI to v3.0. Also, mark extensions defined by the SBI v3.0 specification as non-experimental. Signed-off-by: Anup Patel <[email protected]> Reviewed-by: Clément Léger <[email protected]> Reviewed-by: Atish Patra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils: fdt: Claim Zicntr if time CSR emulation is possibleYao Zi
OpenSBI is capable of emulating time CSR through an external timer for HARTs that don't implement a full Zicntr extension. Let's add Zicntr extension in the FDT if CSR emulation is active. This avoids hardcoding the extension in the devicetree, which may confuse pre-SBI bootloaders. Signed-off-by: Yao Zi <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: sbi: hart: Detect existence of cycle and instret CSRs for ZicntrYao Zi
Zicntr extension specifies three read-only CSRs, time, cycle and instret. It isn't sufficient to report Zicntr is fully supported with only time CSR detected. This patch introduces a bitmap to sbi_hart_features to record availability of these CSRs, which are detected using traps. Zicntr is reported as present if and only if three CSRs are all available on the HARTs. Sites originally depending on SBI_HART_EXT_ZICNTR for detecting existence of time CSR are switched to detect SBI_HART_CSR_TIME instead. Suggested-by: Anup Patel <[email protected]> Signed-off-by: Yao Zi <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils: Fix fdt_mpxy_init() not returning error codeAlvin Chang
It seems that current implementation doesn't fail on fdt_mpxy_init(), because platforms might not have any MPXY devices. In fact, if there are no MPXY devices, fdt_driver_init_all() will return SBI_OK. More importantly, if there is any MPXY device which fails the initialization, OpenSBI must check the error code and stop the booting. Thus, this commit adds the return value for fdt_mpxy_init(). Signed-off-by: Alvin Chang <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils/mpxy: Remove p2a_db_index from RPMI system MSI attributesAnup Patel
The discovery of P2A doorbell system MSI index is now through RPMI shared memory DT node so remove p2a_db_index from RPMI system MSI attributes and access it as a mailbox channel attribute. Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils/mailbox: Parse A2P doorbell value from DTAnup Patel
The A2P doorbell value written to the 32-bit A2P doorbell value must be discoverd from device tree instead of always using the default value 1. Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils/mailbox: Parse P2A doorbell system MSI index from DTAnup Patel
The P2A doorbell system MSI index is expected to be discovered from device tree instead of RPMI system MSI service group attribute. This is based on ARC feedback before RPMI spec was frozen. Let's parse P2A doorbell system MSI index from device tree and also expose it as rpmi channel attribute to RPMI client drivers. Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: utils/mailbox: Update DT register name of A2P doorbellAnup Patel
The latest device tree bindings define A2P doorbell register name as "a2p-doorbell" so update rpmi_shmem_transport_init() accordingly. Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-20lib: Emulate AMO instructions when Zaamo is not availableChao-ying Fu
The AMO instructions are very critical for Linux so allow low-end RISC-V implementations without Zaamo to boot Linux by emulating AMO instructions using Zalrsc when OpenSBI is compiled without Zaamo. Signed-off-by: Chao-ying Fu <[email protected]> Signed-off-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-05-15lib: sbi: Use hsm stop for hsm waitNick Hu
If we hotplug a core and then perform a suspend-to-RAM operation on a multi-core platform, the hotplugged CPU may be woken up along with the rest of the system, particularly on platforms that wake all cores from the deepest sleep state. When this happens, the hotplugged CPU enters the sbi_hsm_wait WFI wait loop instead of transitioning into a platform-specific low-power state. To address this, we add a HSM stop call within the wait loop. This allows platforms that support HSM stop to enter a low-power state when the CPU is unexpectedly woken up. Signed-off-by: Nick Hu <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: properly reset SsstateenRadim Krčmář
sstateen* and hstateen* CSRs must be zeroed by M-mode if the mstateen* registers are missing, to avoid security issues. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: add Ssstateen extensionRadim Krčmář
We already detect Smstateen, but Ssstateen exists as well and it doesn't have the M-state CSRs. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: reset mstateen0Radim Krčmář
The current logic clears some bits based on SBI known extensions. Be safe and do not leave enabled anything that SBI doesn't control. This is not a breaking change, because the register must be initialized to 0 by the ISA on reset, but it is better to not depend on it when we don't need to. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: fix sstateen emulationRadim Krčmář
The Sstateen extension defines 4 sstateen registers, but SBI currently configures the execution environment to throw illegal instruction exception when accessing sstateen1-3. SBI should implement all sstateen registers, so delegate the implementation to hardware by setting the SE bit. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: reset sstateen and hstateenRadim Krčmář
Not resetting sstateen is a potential security hole, because U might be able to access state that S does not properly context-switch. Similar for hstateen with VS and HS. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi_hart: reset hstatusRadim Krčmář
hstatus.HU must be cleared, because U-mode could otherwise use the HLS/HSV instructions. This would allow U-mode to read physical memory directly if vgatp and vsatp was 0. The remaining fields don't seem like a security vulnerability now, but clearing the whole CSR is not an issue, so do that be safe. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-30lib: sbi: use 64 bit csr macrosRadim Krčmář
Switch the most obvious cases to new macros. Reviewed-by: Anup Patel <[email protected]> Signed-off-by: Radim Krčmář <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-24lib: sbi: Set the scratch allocation to alignment to cacheline sizeRaj Vishwanathan
Set the scratch allocation alignment to cacheline size specified by riscv,cbom-block-size in the DTS file to avoid two atomic variables from the same cache line causing livelock on some platforms. If the cacheline is not specified, we set it a default value. Signed-off-by: Raj Vishwanathan <[email protected]> Reviewed-by: Anup Patel <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-23lib: sbi_domain: Reduce memory usage of per-domain hart contextAlvin Chang
In current implementation, the length of hartindex_to_context_table[] array is fixed as SBI_HARTMASK_MAX_BITS. However, the number of harts supported by the platform might not be SBI_HARTMASK_MAX_BITS and is usually smaller than SBI_HARTMASK_MAX_BITS. This means it is unnecessary to allocate such fixed-length array here. Precisely, current implementation always allocates 1024 bytes for hartindex_to_context_table[128] on RV64 platform. However, a platform supports two harts only needs hartindex_to_context_table[2], which only needs 16 bytes. This commit calculates needed size of hartindex_to_context_table[] according to supported number of harts on the platform when registering per-domain data, so that memory usage of per-domain context data can be reduced. Signed-off-by: Alvin Chang <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-23lib: utils/fdt: Remove fdt_match_node()Samuel Holland
This function has been obsoleted by the fdt_driver library and is no longer used. Signed-off-by: Samuel Holland <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-21lib: sbi_mpxy: Change MPXY state as per-domain dataAlvin Chang
OpenSBI supports multiple supervisor domains run on same platform. When these supervisor domains want to communicate with OpenSBI through MPXY channels, they will allocate MPXY shared memory from their own memory regions. Therefore, the MPXY state data structure must be per-domain and per-hart data structure. This commit registers per-domain MPXY state data in sbi_mpxy_init(). The original MPXY state allocated in scratch region is also removed. We also replace sbi_scratch_thishart_offset_ptr() macro as new sbi_domain_mpxy_state_thishart_ptr() macro which gets MPXY state from per-domain data. Signed-off-by: Alvin Chang <[email protected]> Reviewed-by: Yu-Chien Peter Lin <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-21lib: sbi: Handle length of extension name string exceed buffer size errorJimmy Ho
print error message and turncat the string when length of extension name string exceed buffer size Signed-off-by: Jimmy Ho <[email protected]> Reviewed-by: Nick Hu <[email protected]> Reviewed-by: Zong Li <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-15lib: sbi: Remove unnecessary SBI_INIT_LIST_HEADXiang W
No need to initialise the nodes to be added to the linked list Signed-off-by: Xiang W <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-15lib: sbi: Fix SHMEM_PHYS_ADDR for RV32Xiang W
Obtaining a 64-bit address under rv32 does not require combining two 32-bit registers because we ignore upper 32-bits on rv32. Signed-off-by: Xiang W <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-15lib: sbi: Add parameter check in sbi_mpxy_set_shmem()Xiang W
Shared memory needs to be accessed in M-Mode so for now the high address of shared memory can't non-zero. Signed-off-by: Xiang W <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-14lib: sbi: Allow programmable counters to monitor cycle/instret events for ↵Leo Yu-Chi Liang
Andes PMU Referencing commit 0c304b661965 ("lib: sbi: Allow programmable counters to monitor cycle/instret events") to support this functionality for Andes PMU. Signed-off-by: Leo Yu-Chi Liang <[email protected]> Reviewed-by: Samuel Holland <[email protected]> Reviewed-by: Atish Patra <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-14lib: sbi_ipi: Return error for invalid hartidsAndrew Jones
sbi_send_ipi() should return SBI_ERR_INVALID_PARAM if even one hartid constructed from hart_mask_base and hart_mask, is not valid. Signed-off-by: Andrew Jones <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-13lib: sbi: Enable Control Transfer Records (CTR) Ext using xstateen.Rajnesh Kanwal
The Control Transfer Records (CTR) extension provides a method to record a limited branch history in register-accessible internal chip storage. This extension is similar to Arch LBR in x86 and BRBE in ARM. The Extension has been stable and the latest release can be found here https://github.com/riscv/riscv-control-transfer-records/release Signed-off-by: Rajnesh Kanwal <[email protected]> Reviewed-by: Atish Patra <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-04-13lib: sbi_trap: Add support for vectored interruptsSamuel Holland
When redirecting an exception to S-mode, transform the (v)stvec CSR value as described in the privileged spec to derive the S-mode PC. Since OpenSBI never redirects interrupts, only synchronous exceptions, the only action needed is to mask out the (v)stvec.MODE field. Reported-by: Jan Reinhard <[email protected]> Closes: https://github.com/riscv-software-src/opensbi/issues/391 Signed-off-by: Samuel Holland <[email protected]> Reviwed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-03-28lib: Emit lr and sc instructions based on -march flagsChao-ying Fu
When -march=rv64im_zalrsc_zicsr is used, provide atomic operations and locks using lr and sc instructions only. Signed-off-by: Chao-ying Fu <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-03-27lib: utils/serial: Add PXA UARTs supportJunhui Liu
The PXA variant of the uart8250 adds the UART Unit Enable bit (UUE) that needs to be set to enable the XScale PXA UART. And it is required for some RISC-V SoCs like the Spacemit K1 that implement the PXA UART. This introduces the "intel,xscale-uart" compatible to handle setting the UUE bit. Signed-off-by: Junhui Liu <[email protected]> Reviewed-by: Anup Patel <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Anup Patel <[email protected]>
2025-03-27lib: sbi: sse: Add support for SSTATUS.SDTClément Léger
Similarly to what is done for SPELP, handle SSTATUS.SDT upon event injection. In order to mimick an interrupt, set SDT to 1 for injection and save its previous value in interrupted_flags[5:5]. Restore it upon completion. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Andrew Jones <[email protected]>
2025-03-27lib: sbi: sse: Add support for SSTATUS.SPELPClément Léger
As raised during the ARC review, SPELP was not handled during the event injection process. Save it as part of the interrupted flags, clear it before injecting the event and restore it after completion. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Andrew Jones <[email protected]>
2025-03-27lib: sbi: sse: Remove superfluous parenthesis around MSTATUS_* valuesClément Léger
For some reason, there was a pair of useless parenthesis around MSTATUS_* value usage. Remove them. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Andrew Jones <[email protected]>
2025-03-27lib: sbi: sse: Rename STATUS* interrupted flags to SSTATUS*Clément Léger
As raised by Andrew on the kvm-unit-test review, this flags are meant to hold SSTATUS bits in the specification. Rename them to match that. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Andrew Jones <[email protected]>
2025-03-27lib: sbi: sse: Return SBI_EDENIED for read only parameters.Clément Léger
The SSE specification did specified that read only parameters should return SBI_EBADRANGE but was modified recently to return SBI_EDENIED. Signed-off-by: Clément Léger <[email protected]> Reviewed-by: Andrew Jones <[email protected]>