linux-dev/tools/testing/selftests/kvm/lib/aarch64/processor.c, branch linus/master

selftests: KVM: Create helper for making SMCCC calls

2022-05-03T20:30:20Z

The PSCI and PV stolen time tests both need to make SMCCC calls within the guest. Create a helper for making SMCCC calls and rework the existing tests to use the library function. Signed-off-by: Oliver Upton Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220409184549.1681189-11-oupton@google.com

KVM: selftests: arm64: Add support for various modes with 16kB page size

2021-12-28T11:04:20Z

The 16kB page size is not a popular choice, due to only a few CPUs actually implementing support for it. However, it can lead to some interesting performance improvements given the right uarch choices. Add support for this page size for various PA/VA combinations. Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20211227124809.1335409-7-maz@kernel.org

KVM: selftests: arm64: Add support for VM_MODE_P36V48_{4K,64K}

2021-12-28T11:04:20Z

Some of the arm64 systems out there have an IPA space that is positively tiny. Nonetheless, they make great KVM hosts. Add support for 36bit IPA support with 4kB pages, which makes some of the fruity machines happy. Whilst we're at it, add support for 64kB pages as well, though these boxes have no support for it. Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211227124809.1335409-6-maz@kernel.org

KVM: selftests: arm64: Rework TCR_EL1 configuration

2021-12-28T11:04:20Z

The current way we initialise TCR_EL1 is a bit cumbersome, as we mix setting TG0 and IPS in the same swtch statement. Split it into two statements (one for the base granule size, and another for the IPA size), allowing new modes to be added in a more elegant way. No functional change intended. Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20211227124809.1335409-5-maz@kernel.org

KVM: selftests: arm64: Check for supported page sizes

2021-12-28T11:04:20Z

Just as arm64 implemenations don't necessary support all IPA ranges, they don't all support the same page sizes either. Fun. Create a dummy VM to snapshot the page sizes supported by the host, and filter the supported modes. Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20211227124809.1335409-4-maz@kernel.org

KVM: selftests: arm64: Initialise default guest mode at test startup time

2021-12-28T11:04:19Z

As we are going to add support for a variable default mode on arm64, let's make sure it is setup first by using a constructor that gets called before the actual test runs. Suggested-by: Andrew Jones Signed-off-by: Marc Zyngier Reviewed-by: Andrew Jones Link: https://lore.kernel.org/r/20211227124809.1335409-2-maz@kernel.org

KVM: arm64: selftests: Add guest support to get the vcpuid

2021-10-17T10:17:21Z

At times, such as when in the interrupt handler, the guest wants to get the vcpuid that it's running on to pull the per-cpu private data. As a result, introduce guest_get_vcpuid() that returns the vcpuid of the calling vcpu. The interface is architecture independent, but defined only for arm64 as of now. Suggested-by: Reiji Watanabe Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Ricardo Koller Reviewed-by: Reiji Watanabe Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211007233439.1826892-11-rananta@google.com

KVM: arm64: selftests: Maintain consistency for vcpuid type

2021-10-17T10:17:21Z

The prototype of aarch64_vcpu_setup() accepts vcpuid as 'int', while the rest of the aarch64 (and struct vcpu) carries it as 'uint32_t'. Hence, change the prototype to make it consistent throughout the board. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211007233439.1826892-10-rananta@google.com

KVM: arm64: selftests: Introduce ARM64_SYS_KVM_REG

2021-10-17T10:17:20Z

With the inclusion of sysreg.h, that brings in system register encodings, it would be redundant to re-define register encodings again in processor.h to use it with ARM64_SYS_REG for the KVM functions such as set_reg() or get_reg(). Hence, add helper macro, ARM64_SYS_KVM_REG, that converts SYS_* definitions in sysreg.h into ARM64_SYS_REG definitions. Also replace all the users of ARM64_SYS_REG, relying on the encodings created in processor.h, with ARM64_SYS_KVM_REG and remove the definitions. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Ricardo Koller Reviewed-by: Andrew Jones Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20211007233439.1826892-5-rananta@google.com

KVM: selftests: Address extra memslot parameters in vm_vaddr_alloc

2021-07-15T14:19:41Z

Commit a75a895e6457 ("KVM: selftests: Unconditionally use memslot 0 for vaddr allocations") removed the memslot parameters from vm_vaddr_alloc. It addressed all callers except one under lib/aarch64/, due to a race with commit e3db7579ef35 ("KVM: selftests: Add exception handling support for aarch64") Fix the vm_vaddr_alloc call in lib/aarch64/processor.c. Reported-by: Zenghui Yu Signed-off-by: Ricardo Koller Message-Id: <20210702201042.4036162-1-ricarkol@google.com> Reviewed-by: Eric Auger Signed-off-by: Paolo Bonzini