Obtain Host Panic/Boot Failure Messages (#2518)

Add MGS API for obtaining Host Crash debugging info. This PR moves the storage of this information to `packrat`, and also now emits ereports when they occur.

---------

Co-authored-by: Eliza Weisman <eliza@elizas.website>

Author: jamesmunns

Cargo.lock

@@ -132,14 +132,14 @@ notifications = ["i2c1-irq", "i2c2-irq", "i2c3-irq", "i2c4-irq"]
 [tasks.packrat]
 name = "task-packrat"
 priority = 1
-stacksize = 1496
+stacksize = 1696
 start = true
 task-slots = ["jefe"]
 features = ["cosmo", "ereport"]
 notifications = ["task-faulted"]
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]
@@ -258,7 +258,7 @@ features = ["stm32h753", "usart6", "baud_rate_3M", "hardware_flow_control", "vla
 uses = ["usart6", "dbgmcu"]
 interrupts = {"usart6.irq" = "usart-irq"}
 priority = 9
-max-sizes = {flash = 74000, ram = 65536}
+max-sizes = {flash = 76000, ram = 65536}
 stacksize = 7632
 start = true
 task-slots = ["sys", { cpu_seq = "cosmo_seq" }, "hf", "control_plane_agent", "net", "packrat", "i2c_driver", { spi_driver = "spi2_driver" }, "sprot", "auxflash"]

app/cosmo/base.toml

@@ -125,7 +125,7 @@ notifications = ["i2c1-irq", "jefe-state-change"]
 [tasks.packrat]
 name = "task-packrat"
 priority = 1
-stacksize = 1496
+stacksize = 1600
 start = true
 task-slots = ["jefe"]
 features = ["gimlet", "ereport"]
@@ -199,7 +199,7 @@ task-slots = ["sys"]
 notifications = ["hash-irq"]
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]
@@ -243,7 +243,7 @@ features = ["stm32h753", "uart7", "baud_rate_3M", "hardware_flow_control", "vlan
 uses = ["uart7", "dbgmcu"]
 interrupts = {"uart7.irq" = "usart-irq"}
 priority = 8
-max-sizes = {flash = 72000, ram = 65536}
+max-sizes = {flash = 75000, ram = 65536}
 stacksize = 7280
 start = true
 task-slots = ["sys", { cpu_seq = "gimlet_seq" }, "hf", "control_plane_agent", "net", "packrat", "i2c_driver", { spi_driver = "spi2_driver" }, "sprot"]

app/gimlet/base.toml

@@ -206,7 +206,7 @@ features = ["vlan"]
 notifications = ["socket"]
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 task-slots = ["sys", "user_leds", "packrat"]
 
 # VLAN configuration

app/gimletlet/app.toml

@@ -11,7 +11,7 @@ interrupts = {"uart8.irq" = "usart-irq"}
 
 # Ereport stuff
 [tasks.packrat]
-stacksize = 1496
+stacksize = 1600
 task-slots = ["jefe"]
 features = ["ereport"]
 notifications = ["task-faulted"]
@@ -29,7 +29,7 @@ features = ["vlan"]
 notifications = ["socket"]
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]

app/grapefruit/standalone.toml

@@ -91,7 +91,7 @@ pin = 11
 owner = {name = "sequencer", notification = "psu_pwr_ok_5"}
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]

app/observer/base.toml

@@ -94,7 +94,7 @@ owner = {name = "sequencer", notification = "psu_pwr_ok_6"}
 
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]

app/psc/base.toml

@@ -56,7 +56,7 @@ pin = 3
 owner = {name = "sprot", notification = "rot_irq"}
 
 [tasks.rng_driver]
-features = ["h753", "ereport"]
+features = ["h753", "packrat"]
 name = "drv-stm32h7-rng"
 priority = 6
 uses = ["rng"]

app/sidecar/base.toml

@@ -23,7 +23,7 @@ idol = { workspace = true }
 [features]
 h743 = ["stm32h7/stm32h743", "drv-stm32xx-sys-api/h743"]
 h753 = ["stm32h7/stm32h753", "drv-stm32xx-sys-api/h753"]
-ereport = ["task-packrat-api"]
+packrat = ["task-packrat-api"]
 no-ipc-counters = ["idol/no-counters"]
 
 # This section is here to discourage RLS/rust-analyzer from doing test builds,

drv/stm32h7-rng/Cargo.toml

@@ -25,7 +25,7 @@ use userlib::{RecvMessage, hl, task_slot};
 
 task_slot!(SYS, sys);
 
-#[cfg(feature = "ereport")]
+#[cfg(feature = "packrat")]
 task_slot!(PACKRAT, packrat);
 
 counted_ringbuf!(Trace, 32, Trace::Blank);
@@ -37,7 +37,7 @@ enum Trace {
     ClockError,
     SeedError,
     Recovered,
-    #[cfg(feature = "ereport")]
+    #[cfg(feature = "packrat")]
     SetRestartId(Result<(), task_packrat_api::CacheSetError>),
 }
 
@@ -233,7 +233,7 @@ impl NotificationHandler for Stm32h7RngServer {
     }
 }
 
-#[cfg(feature = "ereport")]
+#[cfg(feature = "packrat")]
 fn generate_restart_id(rng: &mut Stm32h7Rng) {
     use task_packrat_api::Packrat;
     const BYTES: usize = 16;
@@ -257,7 +257,8 @@ fn generate_restart_id(rng: &mut Stm32h7Rng) {
 
     let id = u128::from_ne_bytes(bytes);
     let packrat = Packrat::from(PACKRAT.get_task_id());
-    let result = packrat.set_ereport_restart_id(id);
+    // Note: not just for ereports anymore!
+    let result = packrat.set_restart_id(id);
     ringbuf_entry!(Trace::SetRestartId(result));
 }
 
@@ -266,7 +267,7 @@ fn main() -> ! {
     let mut rng = Stm32h7Rng::new();
     rng.init();
 
-    #[cfg(feature = "ereport")]
+    #[cfg(feature = "packrat")]
     generate_restart_id(&mut rng);
 
     let mut srv = Stm32h7RngServer::new(rng);