G8l: IPC-block context-save writer-authority audit

pub const S299_WRITER_BOUNDARY_SITES: usize = 1;
pub const S299_WRITER_AUTHORITY_SITES: usize = 0;
pub const S299_DIRECT_SCHEDULER_ACCESS_SITES: usize = S298_DIRECT_SCHEDULER_ACCESS_SITES;
pub const S299_IMMUTABLE_READ_SITES: usize = S298_IMMUTABLE_READ_SITES;
pub const S299_WHOLE_SCHEDULER_GUARDED_SITES: usize = S298_WHOLE_SCHEDULER_GUARDED_SITES;
pub const S299_WHOLE_SCHEDULER_UNROUTED_SITES: usize = S298_WHOLE_SCHEDULER_UNROUTED_SITES;
pub const S299_OPEN_WRITER_SITES: usize = S298_OPEN_WRITER_SITES;

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum G8lS299SchedulerWriterAuthorityAuditOutcome {
    Idle,
    AwaitingWriterAuthority {
        request_id: u64,
        guarded_sites: usize,
        writer_sites: usize,
    },
}

#[derive(Clone, Copy, Debug, PartialEq, Eq)]
pub enum G8lS299SchedulerWriterAuthorityAuditError {
    S298(G8lS298SchedulerWriterAuthorityAuditError),
    S245(G8lS245ExclusionAdmissionRequestError),
    PriorCoverageDrift {
        guarded_sites: usize,
        unrouted_sites: usize,
    },
}

/// Revalidate the prior fail-closed authority boundary without taking
/// admission or constructing a production exclusive wrapper.
pub fn preflight_s299_scheduler_writer_authority(
    caller_cpu: usize,
    request: Option<G8lS245WholeSchedulerExclusionAdmissionRequestView>,
) -> Result<G8lS299SchedulerWriterAuthorityAuditOutcome, G8lS299SchedulerWriterAuthorityAuditError>
{
    match preflight_s298_scheduler_writer_authority(caller_cpu, request)
        .map_err(G8lS299SchedulerWriterAuthorityAuditError::S298)?
    {
        G8lS298SchedulerWriterAuthorityAuditOutcome::Idle => {
            Ok(G8lS299SchedulerWriterAuthorityAuditOutcome::Idle)
        }
        G8lS298SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
            request_id,
            guarded_sites,
            writer_sites,
        } if guarded_sites == S299_WHOLE_SCHEDULER_GUARDED_SITES
            && writer_sites == S299_OPEN_WRITER_SITES =>
        {
            Ok(
                G8lS299SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
                    request_id,
                    guarded_sites,
                    writer_sites,
                },
            )
        }
        G8lS298SchedulerWriterAuthorityAuditOutcome::AwaitingWriterAuthority {
            guarded_sites,
            writer_sites: _,
            ..
        } => Err(
            G8lS299SchedulerWriterAuthorityAuditError::PriorCoverageDrift {
                guarded_sites,
                unrouted_sites: S299_DIRECT_SCHEDULER_ACCESS_SITES - guarded_sites,
            },
        ),
    }
}

#[test]
fn s299_keeps_ipc_block_context_save_writer_open_until_exclusive_authority_exists() {
    assert_eq!(S299_WRITER_BOUNDARY_SITES, 1);
    assert_eq!(S299_WRITER_AUTHORITY_SITES, 0);
    assert_eq!(S299_DIRECT_SCHEDULER_ACCESS_SITES, 113);
    assert_eq!(S299_IMMUTABLE_READ_SITES, 44);
    assert_eq!(S299_WHOLE_SCHEDULER_GUARDED_SITES, 44);
    assert_eq!(S299_WHOLE_SCHEDULER_UNROUTED_SITES, 69);
    assert_eq!(S299_OPEN_WRITER_SITES, 69);
}

  {
    id: "g8l-s299-ipc-block-context-save-writer-authority-audit-partial",
    date: "2026-08-26",
    sequence: 299,
    status: "passed",
    umbrella_status: "partial",
    title: "G8l: IPC-block context-save writer-authority audit",
    summary:
      "S299 focused 15/15 PASS ile save_user_context_for_ipc_block içindeki tek explicit mutable scheduler aliasını kaynakta doğrular. Current task varsa is_user, user_sp, ELR, SPSR, x0–x29 ve LR slot 30 exact sırada kaydedilir; current task yoksa yol no-op kalır. İki context-save writer'ında kaynak/model audit coverage tamamlanır, downstream first_eret_to_user_direct writer'ı ayrıca açık tutulur. Bu production migration değildir. Writer authority yalnız model gate'inin exclusive lease'iyle mümkündür, reader lease'i writer'ı açmaz. Production inventory 113 direct / 44 immutable guarded / 69 open writer olarak değişmez ve production exclusive wrapper, provider authority, whole-scheduler exclusion veya scheduler mutation üretilmez.",
    evidence: [
      "S299 focused kaynak/model kapısı iki bağımsız koşuda 15/15 PASS verdi: 130 B / SHA-256 0447f2fe9dc6fdf30815a6962cf23d978425e51bef2acde1efb27e5da13a78b3.",
      "save_user_context_for_ipc_block içindeki tek addr_of_mut!(SCHEDULER) writer boundary'si audit edilir. Conditional current_task borrow, is_user=true, user_sp, saved_user_elr, saved_user_spsr, saved_user_gprs[..30] copy ve saved_user_gprs[30]=ctx.lr sırası kaynakta görünür; no-current yolunda else/mutation yoktur. Context-save çifti kaynak/model düzeyinde kapsanır, first-ERET writer ayrı kalır.",
      "Model gate reader membership exclusive writer authority'yi ExclusiveBusy ile bloklar; reader bırakıldıktan sonra non-zero token'lı exclusive lease alınır. Bu host/model evidence'tır.",
      "S298 authority preflight yeniden doğrulanır; pending S245 request korunur ve sonuç AwaitingWriterAuthority { guarded_sites: 44, writer_sites: 69 } olarak döner.",
      "Dört AArch64 profil derlemesi iki koşuda byte-equal exit 0 verdi: QEMU 110646 B / d67f3286, RPi4 149371 B / af2ea242, RPi5 409252 B / 2255a829 ve RPi5+SMP 409194 B / f7b66bbf. Warning header'ları sırasıyla 291, 389, 840 ve 840'tır; zero-warning iddiası değildir.",
      "Birleşik board-rpi5,board-qemu özellikleri iki koşuda beklenen exit 101, 18590 B / 380b716b, 17 error ve 22 warning header ile fail-closed kaldı; S299 writer boundary'si iki board profilinin birlikte etkinleşmesini açmaz.",
      "S238–S299 dependency matrisi iki koşuda 63 grup / 869/869 PASS; ham loglar byte-equal 8112 B / 3a04d9a0733bf9a73f45d01ebbc53695a6d1f55f9688afa905128b80435f1010, süre-normalize özetler byte-equal 8238 B / 704c3703d4c1507de25c569b535e44f09d394764606c04971358034350cbf9fd. Bu production writer-authority invocation kanıtı değildir.",
      "Ortak make verify-qemu iki koşuda PASS verdi: 116222 B / 16ba9c27 ve 116139 B / 680e78da; W^X 31/31, S271 GRAPH_ABSENT=YES, RuntimePmm baseline, EL0 x4096, IPC 20/20, tek beklenen S142 fatal containment ve SEC5 korunur. Bu ortak smoke S299 production writer invocation kanıtı değildir.",
      "Exact yedi tarihsel G8h assertion adıyla dışlandığında workspace iki koşuda 261 sonuç grubu / 2658 PASS / 7 filtered verdi: ham loglar 61411 B / eadb315e ve 34d4f391, süre-normalize 25198 B özet byte-equal / SHA-256 69a70cae823b4d2ed845c8d1ed3554ab356c266abdc480b258bb88ba9f6d29b5. Filtresiz koşu exit 101, 56633 B / 5b673919 ile frozen S96 exceptions.S identity kapısında RED kaldı; full-workspace GREEN iddia edilmez.",
      "S299 production exclusive wrapper, provider authority, whole-scheduler exclusion, QEMU runtime fixture veya scheduler mutation iddiası eklemez; physical/device operations=0 ve RUNBOOK_EXECUTED_IN_S299=NO.",
    ],
    commands: [
      "cargo test --quiet -p aselsan_microkernel_simulation --test g8l_target_dispatch_scheduler_owner_scheduler_mutation_production_migration_lifecycle_s299_ipc_block_context_save_writer_authority_audit -- --test-threads=1",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-qemu",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-rpi4",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-rpi5",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --no-default-features --features board-rpi5,smp",
      "cargo check --quiet -p aselsan_kernel --target aarch64-unknown-none --features board-rpi5",
      "make verify-qemu",
    ],
    terminalSessions: [
      {
        id: "g8l-s299-ipc-block-context-save-writer-authority-audit",
        title: "G8l S299 IPC-block context-save writer-authority audit",
        commandLines: [
          "cargo test --quiet -p aselsan_microkernel_simulation --test g8l_target_dispatch_scheduler_owner_scheduler_mutation_production_migration_lifecycle_s299_ipc_block_context_save_writer_authority_audit -- --test-threads=1",
        ],
        outputLines: [
          "test result: ok; S299 focused 1 group / 15 passed; 0 failed",
          "repeat-stable quiet output: 130 B / 0447f2fe9dc6fdf30815a6962cf23d978425e51bef2acde1efb27e5da13a78b3",
          "IPC-block context-save writer authority remains model-only: reader blocks exclusive lease; conditional user/SP/ELR/SPSR/x0-x29/LR snapshot ordering is source-audited while the downstream first-ERET writer and 69 production writer sites remain open",
          "dependency: S238–S299 · 63 groups · 869/869 PASS; workspace: 261 groups · 2658 PASS · 7 historical filtered",
        ],
        exitCode: 0,
        outputMode: "selected",
      },
    ],
    terminalSessionsNote:
      "S299 kaynak/model fail-closed authority boundary'sidir; production writer guard/migration, QEMU fixture mutation ve fiziksel/device execution claim edilmez.",
    limitations: [
      "S299 save_user_context_for_ipc_block içindeki tek explicit mutable scheduler aliasını audit ederek context-save çiftinin kaynak/model coverage'ını tamamlar; downstream first_eret_to_user_direct writer'ı ve toplam 69 production writer site açık kalır.",
      "Exclusive lease yalnız host/model gate'inde test edilir; production exclusive wrapper, provider authority ve whole-scheduler exclusion açık kalır.",
      "S238–S299 dependency matrisi exact 63 grup / 869/869 PASS'tir; bu production writer authority invocation kanıtı değildir.",
      "Filtresiz workspace frozen S96 identity kapısında RED'dir; workspace umbrella GREEN iddia edilmez.",
      "Supported-profile runtime invocation, Generic SMP ve fiziksel RPi kabulü açık kalır; S299 physical/device operations=0 ve RUNBOOK_EXECUTED_IN_S299=NO.",
    ],
  },