** Also affects: linux-nvidia-6.14 (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: linux-nvidia (Ubuntu)
** Also affects: linux-nvidia-6.14 (Ubuntu Noble)
Importance: Undecided
Status: New
** Changed in: linux-nvidia-6.14 (Ubuntu)
Status: New => Invalid
** Changed in: linux-nvidia-6.14 (Ubuntu Noble)
Status: New => Fix Committed
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Packages, which is subscribed to linux-nvidia in Ubuntu.
https://bugs.launchpad.net/bugs/2118663
Title:
Backport support for arm64 BRBE and a future NVIDIA CPU ID
Status in linux-nvidia-6.14 package in Ubuntu:
Invalid
Status in linux-nvidia-6.14 source package in Noble:
Fix Committed
Bug description:
These patches are needed for a future NVIDIA arm64 CPU.
The BRBE series was split in half, with the first part making v6.15
and the second part in linux-next (expected to land in v6.17).
Lore discussion:
https://lore.kernel.org/all/[email protected]/
Upstream SHAs (v6.15 and linux-next):
04bd15c4cbc3 perf: arm_pmuv3: Call kvm_vcpu_pmu_resync_el0() before enabling
counters
dcca27bc1ecc perf: arm_pmu: Don't disable counter in armpmu_add()
4b0567ad0be5 perf: arm_pmuv3: Don't disable counter in armv8pmu_enable_event()
7a5387748215 perf: arm_v7_pmu: Drop obvious comments for enabling/disabling
counters and interrupts
7bf1001e0d91 perf: arm_v7_pmu: Don't disable counter in
(armv7|krait_|scorpion_)pmu_enable_event()
c2e793da59fc perf: apple_m1: Don't disable counter in m1_pmu_enable_event()
dc4d58a752ea perf: arm_pmu: Move PMUv3-specific data
52e4a56ab8b8 arm64/sysreg: Add BRBE registers and fields
ae344bcb0d49 arm64: Handle BRBE booting requirements
d7567e9b9ba5 KVM: arm64: nvhe: Disable branch generation in nVHE guests
58074a0fce66 perf: arm_pmuv3: Add support for the Branch Record Buffer
Extension (BRBE)
Note that "4516b8afe18a arm64: el2_setup.h: Make __init_el2_fgt labels
consistent, again” was picked as a prerequisite for the BRBE series.
The CPU ID patch will be upstreamed at a later date and is taken as
SAUCE for now.
Testing: Performed a boot test on Grace hardware and verified the BRBE
support is present but not active.
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