vasilito
34360e1e4f
P0-P2: Barrier SMP, sigmask/pthread_kill races, robust mutexes, RT scheduling, POSIX sched API P3: PerCpuSched struct, per-CPU wiring, work stealing, load balancing, initial placement P4: 64-shard futex table, REQUEUE, PI futexes (LOCK_PI/UNLOCK_PI/TRYLOCK_PI), robust futexes, vruntime tracking, min-vruntime SCHED_OTHER selection P5: setpriority/getpriority, pthread_setaffinity_np, pthread_setname_np, pthread_setschedparam (Redox) P6: Cache-affine scheduling (last_cpu + vruntime bonus), NUMA topology kernel hints + numad userspace daemon Stability fixes: make_consistent stores 0 (dead TID fix), cond.rs error propagation, SPIN_COUNT adaptive spinning, Sys::open &str fix, PI futex CAS race, proc.rs lock ordering, barrier destroy Patches: 33 kernel + 58 relibc patches, all tracked in recipes Docs: KERNEL-SCHEDULER-MULTITHREAD-IMPROVEMENT-PLAN.md updated, SCHEDULER-REVIEW-FINAL.md created Architecture: NUMA topology parsing stays userspace (numad daemon), kernel stores lightweight NumaTopology hints
62 lines
2.8 KiB
Diff
62 lines
2.8 KiB
Diff
diff --git a/drivers/pcid/src/scheme.rs b/drivers/pcid/src/scheme.rs
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index ce55b33f..c06bdec4 100644
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--- a/drivers/pcid/src/scheme.rs
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+++ b/drivers/pcid/src/scheme.rs
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@@ -21,6 +21,10 @@ enum Handle {
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Access,
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Device,
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Channel { addr: PciAddress, st: ChannelState },
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+ // Uevent surface for hotplug consumers. Opening uevent returns an object
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+ // from which device add/remove events can be read. Since pcid currently
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+ // only scans at startup, this surface is ready for hotplug polling consumers.
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+ Uevent,
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SchemeRoot,
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/// Represents an open handle to a device's bind endpoint
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Bind { addr: PciAddress },
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@@ -34,7 +38,7 @@ struct HandleWrapper {
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}
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fn is_file(&self) -> bool {
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- matches!(self, Self::Access | Self::Channel { .. } | Self::Bind { .. })
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+ matches!(self, Self::Access | Self::Channel { .. } | Self::Bind { .. } | Self::Uevent)
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}
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fn is_dir(&self) -> bool {
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!self.is_file()
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@@ -96,6 +100,8 @@ impl SchemeSync for PciScheme {
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}
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} else if path == "access" {
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Handle::Access
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+ } else if path == "uevent" {
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+ Handle::Uevent
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} else {
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let idx = path.find('/').unwrap_or(path.len());
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let (addr_str, after) = path.split_at(idx);
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@@ -140,6 +146,7 @@ impl SchemeSync for PciScheme {
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Handle::Device => (DEVICE_CONTENTS.len(), MODE_DIR | 0o755),
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Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } => (0, MODE_CHR | 0o600),
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+ Handle::Uevent => (0, MODE_CHR | 0o644),
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Handle::SchemeRoot => return Err(Error::new(EBADF)),
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};
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stat.st_size = len as u64;
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@@ -164,6 +171,12 @@ impl SchemeSync for PciScheme {
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Handle::Channel {
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addr: _,
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ref mut st,
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} => Self::read_channel(st, buf),
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+ Handle::Uevent => {
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+ // Uevent surface is ready for hotplug polling consumers.
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+ // pcid currently only scans at startup, so return empty (EAGAIN would indicate no data available).
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+ // Consumers can poll and re-read to check for new events.
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+ Ok(0)
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+ }
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Handle::SchemeRoot | Handle::Bind { .. } => Err(Error::new(EBADF)),
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_ => Err(Error::new(EBADF)),
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}
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@@ -199,7 +212,7 @@ impl SchemeSync for PciScheme {
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}
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Handle::Device => DEVICE_CONTENTS,
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- Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } => return Err(Error::new(ENOTDIR)),
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+ Handle::Access | Handle::Channel { .. } | Handle::Bind { .. } | Handle::Uevent => return Err(Error::new(ENOTDIR)),
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Handle::SchemeRoot => return Err(Error::new(EBADF)),
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};
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for (i, dent_name) in entries.iter().enumerate().skip(offset) {
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