Oct 2023 – Oct 2025 · 2 yrs · Bengaluru

• Linux Kernel upstream development engineer working on KVM Virtualization and locking/synchronization areas on AMD EPYC™ Server Processors.

Mar 2021 – Sep 2023 · 2 yrs 6 mos

• Lead a small team of 5 members, working on CPU system software on all Arm CPU based
• Qualcomm Automotive SoCs. Primary responsibilities include:
• o Identify new Arm v8+ application processor software requirements for next generation of
• Automotive SoCs; work with CPU design team to incorporate those requirements in
• hardware. Evaluate impact on software flows due to new CPU architecture features, and
• provide feedback to design. Similarly, evaluate software requirements for other SCP
• coprocessors, GIC, and other IP blocks in the application processor subsystem.
• o Create validation software/litmus tests for architecture features either on baremetal software
• or opensource EL3/EL2/EL1 software stacks.
• o Evaluate, in software, architecture features in latest Arm v8 extensions, on Qualcomm SoCs;
• develop proof-of-concept code to validate those features and work with internal software
• teams to commercialize those features
• o Debug complex Arm CPU issues reported internally and in customer software use cases;
• analyze the Silicon erratas and work with Arm design team to root cause the issue.
• o Maintain software for coprocessors, which act as SCP microcontrollers.
• o Lead the development of SCMI Virtio Backend support in Linux Kernel: https://lore.kernel.org/linuxarm-kernel/CAKfTPtDNmYiSy=WsSiDvtQXvB_bpS0f-Z4FwB=rbpTC-PjRPJg@mail.gmail.com/T/
• . Drove various activities in the development phase – design document, covering end to end SCMI
• Virtio flow; ported the code to KVM and Gunyah software stacks, and worked with internal team to
• enable various SCMI protocols on Qualcomm SoCs. The same feature was presented in Linaro meet:
• https://resources.linaro.org/en/resource/vwsLkWDVJdCC6DQSGHwCHq

Jul 2012 – Feb 2021 · 8 yrs 7 mos

• Linux BSP support during presilicon and post silicon phases. This includes
• Booting MSM Linux kernel till shell and make sure that basic functionality like multicore execution, timer,
• interrupts, Pinctrl/GPIO, etc. are working fine.
• Analyze internal and customer reported kernel stability issues in various Linux kernel
• subsystems like timer, interrupt, CPU hotplug, Workqueues, RCU, Watchdog, arch64 arch
• (KASLR, memory ordering), idle, ARM64 SMC call handling, locking (mutex, spinlock,
• qspinlock, ticket spinlocks), cgroups.
• Identify any fixes in new kernel versions or come up with a potential fix and/or report the issue to upstream community.
• Worked on multi VM enablement on Gunyah Hypervisor.
• Worked on implementing/porting Spectre vulnerability fixes on Qualcomm
• SoCs in kernel versions starting from v3.0 to v4.4.
• Worked on various downstream features in the areas of GICv3, crash debug dump,
• VM use cases.
• Prototyped multiple ARM64 features on Linux - SDEI, pseudo NMI, LSE atomics evaluation.

Jul 2010 – Jul 2012 · 2 yrs