Hart drivers#95
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remexre
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Mar 26, 2026
| /** | ||
| * The current task. | ||
| */ | ||
| struct task *task; |
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should this be in this pr?
remexre
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Mar 26, 2026
| * A hart device. | ||
| * | ||
| * Currently, these devices are for "normal" SMP systems, where each hart runs | ||
| * its own copy of the kernel, makes its own scheduling decisions, etc. When we |
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copy is not good wording
remexre
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Mar 26, 2026
| * 1024-bit vector registers. This would result in two hart groups, one for the | ||
| * X100 cores and one for the A100 cores. | ||
| */ | ||
| struct hart_group { |
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does this need a refcount?
remexre
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Mar 26, 2026
| } else { | ||
| print("Devicetree device {cstr} did not have the thead,vlenb property", | ||
| node->name); | ||
| vlen = VLEN_1024; |
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should this be VLEN_UNKNOWN?
remexre
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Mar 26, 2026
| run_selftests(); | ||
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| struct hart_locals *hart_locals = get_hart_locals(); | ||
| print("{uptr}", hart_locals->hart); |
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We need to ensure that tasks are only scheduled on harts with the same register_save_area size, meaning we need to track which harts have which size. It's easiest to keep track of this if we hook that tracking into ordinary device detection, so this device class exists for that purpose. Because init_boothart_hart_locals_late panics if it cannot find the hart device for the boothart, this will not boot at the moment, though it will build. The next patch fixes this. Signed-off-by: Amy Ringo <me@remexre.com>
This restores the ability to boot, since the hart will now be properly detected. Signed-off-by: Amy Ringo <me@remexre.com>
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Stacked on #102.
We need to ensure that tasks are only scheduled on harts with the same
register_save_area size, meaning we need to track which harts have which
size.
It's easiest to keep track of this if we hook that tracking into
ordinary device detection, so this device class exists for that purpose.