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authorWill Deacon <will@kernel.org>2026-05-18 16:31:26 +0100
committerMarc Zyngier <maz@kernel.org>2026-05-27 15:30:39 +0100
commit4cceeb8da363ac5127b147ee7345104743f53e9d (patch)
treeafcbc8e9ebbf1291a6d72d343a48cd0d077a9d12 /include/linux
parent1bdcdc84f9f91e702bb4410cb46016cde1d57d9b (diff)
KVM: arm64: Don't populate TPIDR_EL2 in finalise_el2()
Currently, it is not necessary for __finalise_el2() to configure TPIDR_EL2: * The hyp stub code does not consume the value of TPIDR_EL2. * On the boot cpu, TPIDR_EL1 is used for the percpu offset until the ARM64_HAS_VIRT_HOST_EXTN cpucap is detected and boot alternatives are patched. Before boot alternatives are patched, cpu_copy_el2regs() will copy TPIDR_EL1 into TPIDR_EL2. It is not necessary for __finalise_el2() to initialise TPIDR_EL2 before this. * Secondary CPUs are brought up after boot alternatives have been patched, and __secondary_switched() will initialize TPIDR_EL2 in 'init_cpu_task', after finalise_el2() calls __finalise_el2() * KVM hyp code which may consume TPIDR_EL2 is brought up after all secondaries have been booted, once TPIDR_El2 has been configured on all CPUs. Remove the redundant initialisation from __finalise_el2(). Cc: Oliver Upton <oupton@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Will Deacon <will@kernel.org> Reviewed-by: Marc Zyngier <maz@kernel.org> Link: https://patch.msgid.link/20260518153127.6078-1-will@kernel.org Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'include/linux')
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