kernel.git/arch/arm64/kvm/Makefile, branch linux-5.16.y

KVM: stats: Add fd-based API to read binary stats data

2021-06-24T15:47:57Z

This commit defines the API for userspace and prepare the common functionalities to support per VM/VCPU binary stats data readings. The KVM stats now is only accessible by debugfs, which has some shortcomings this change series are supposed to fix: 1. The current debugfs stats solution in KVM could be disabled when kernel Lockdown mode is enabled, which is a potential rick for production. 2. The current debugfs stats solution in KVM is organized as "one stats per file", it is good for debugging, but not efficient for production. 3. The stats read/clear in current debugfs solution in KVM are protected by the global kvm_lock. Besides that, there are some other benefits with this change: 1. All KVM VM/VCPU stats can be read out in a bulk by one copy to userspace. 2. A schema is used to describe KVM statistics. From userspace's perspective, the KVM statistics are self-describing. 3. With the fd-based solution, a separate telemetry would be able to read KVM stats in a less privileged environment. 4. After the initial setup by reading in stats descriptors, a telemetry only needs to read the stats data itself, no more parsing or setup is needed. Reviewed-by: David Matlack Reviewed-by: Ricardo Koller Reviewed-by: Krish Sadhukhan Reviewed-by: Fuad Tabba Tested-by: Fuad Tabba #arm64 Signed-off-by: Jing Zhang Message-Id: <20210618222709.1858088-3-jingzhangos@google.com> Signed-off-by: Paolo Bonzini

KVM: arm64: Implement the TRNG hypervisor call

2021-01-25T22:19:31Z

Provide a hypervisor implementation of the ARM architected TRNG firmware interface described in ARM spec DEN0098. All function IDs are implemented, including both 32-bit and 64-bit versions of the TRNG_RND service, which is the centerpiece of the API. The API is backed by the kernel's entropy pool only, to avoid guests draining more precious direct entropy sources. Signed-off-by: Ard Biesheuvel [Andre: minor fixes, drop arch_get_random() usage] Signed-off-by: Andre Przywara Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20210106103453.152275-6-andre.przywara@arm.com

KVM: arm64: Replace KVM_ARM_PMU with HW_PERF_EVENTS

2021-01-04T16:50:16Z

KVM_ARM_PMU only existed for the benefit of 32bit ARM hosts, and makes no sense now that we are 64bit only. Get rid of it. Signed-off-by: Marc Zyngier

KVM: arm64: Get rid of the AArch32 register mapping code

2020-11-10T08:34:27Z

The only use of the register mapping code was for the sake of the LR mapping, which we trivially solved in a previous patch. Get rid of the whole thing now. Signed-off-by: Marc Zyngier

KVM: arm64: Consolidate exception injection

2020-11-10T08:34:26Z

Move the AArch32 exception injection code back into the inject_fault.c file, removing the need for a few non-static functions now that AArch32 host support is a thing of the past. Signed-off-by: Marc Zyngier

KVM: arm64: nVHE: Migrate hyp-init to SMCCC

2020-09-15T17:39:04Z

To complete the transition to SMCCC, the hyp initialization is given a function ID. This looks neater than comparing the hyp stub function IDs to the page table physical address. Some care is taken to only clobber x0-3 before the host context is saved as only those registers can be clobbered accoring to SMCCC. Fortunately, only a few acrobatics are needed. The possible new tpidr_el2 is moved to the argument in x2 so that it can be stashed in tpidr_el2 early to free up a scratch register. The page table configuration then makes use of x0-2. Signed-off-by: Andrew Scull Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200915104643.2543892-19-ascull@google.com

Merge branch 'kvm-arm64/target-table-no-more' into kvmarm-master/next-WIP

2020-07-28T15:10:32Z

Signed-off-by: Marc Zyngier

KVM: arm64: Move hyp-init.S to nVHE

2020-07-05T17:38:12Z

hyp-init.S contains the identity mapped initialisation code for the non-VHE code that runs at EL2. It is only used for non-VHE. Adjust code that calls into this to use the prefixed symbol name. Signed-off-by: Andrew Scull Signed-off-by: David Brazdil Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200625131420.71444-8-dbrazdil@google.com

KVM: arm64: Remove the target table

2020-07-05T17:20:45Z

Finally, remove the target table. Merge the code that checks the tables into kvm_reset_sys_regs() as there is now only one table. Signed-off-by: James Morse Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20200622113317.20477-6-james.morse@arm.com

KVM: arm64: Clean up kvm makefiles

2020-05-16T14:04:18Z

Consolidate references to the CONFIG_KVM configuration item to encompass entire folders rather than per line. Signed-off-by: Fuad Tabba Signed-off-by: Marc Zyngier Acked-by: Will Deacon Link: https://lore.kernel.org/r/20200505154520.194120-5-tabba@google.com