This patch series enable userspace writable for below idregs:
ID_AA64DFR0_EL1, ID_DFR0_EL1, ID_AA64PFR0_EL1, ID_AA64MMFR{0, 1, 2, 3}_EL1.
A vm ioctl is added to get feature ID register writable masks from userspace.
A selftest is added to verify that KVM handles the writings from user space
correctly.
A relevant patch from Oliver is picked from [3].
It is based on v6.5-rc4 which contains infrastructure for writable idregs.
---
* v6 -> v7
- Rebase on v6.5-rc4.
- Add a vm ioctl to get feature ID register writable masks from userspace.
- Split the change for debug version in ID_{AA64}DFR0_EL1.
- Addressed some bugs in selftest.
* v5 -> v6
- Override the type of field AA64DFR0_EL1_DebugVer to be FTR_LOWER_SAFE by the
discussion of Oliver and Suraj.
* v4 -> v5
- Rebase on v6.5-rc1 which contains infrastructure for writable idregs.
- Use guest ID registers values for the sake of emulation.
- Added a selftest to verify idreg userspace writing.
* v3 -> v4
- Rebase on v11 of writable idregs series at [2].
* v2 -> v3
- Rebase on v6 of writable idregs series.
- Enable writable for ID_AA64PFR0_EL1 and ID_AA64MMFR{0, 1, 2}_EL1.
* v1 -> v2
- Rebase on latest patch series [1] of enabling writable ID register.
[1] https://lore.kernel.org/all/20230402183735.3011540-1-jingzhangos@xxxxxxxxxx
[2] https://lore.kernel.org/all/20230602005118.2899664-1-jingzhangos@xxxxxxxxxx
[3] https://lore.kernel.org/kvmarm/20230623205232.2837077-1-oliver.upton@xxxxxxxxx
[v1] https://lore.kernel.org/all/20230326011950.405749-1-jingzhangos@xxxxxxxxxx
[v2] https://lore.kernel.org/all/20230403003723.3199828-1-jingzhangos@xxxxxxxxxx
[v3] https://lore.kernel.org/all/20230405172146.297208-1-jingzhangos@xxxxxxxxxx
[v4] https://lore.kernel.org/all/20230607194554.87359-1-jingzhangos@xxxxxxxxxx
[v5] https://lore.kernel.org/all/20230710192430.1992246-1-jingzhangos@xxxxxxxxxx
[v6] https://lore.kernel.org/all/20230718164522.3498236-1-jingzhangos@xxxxxxxxxx
---
Jing Zhang (8):
KVM: arm64: Allow userspace to get the writable masks for feature ID
registers
KVM: arm64: Document KVM_ARM_GET_FEATURE_ID_WRITABLE_MASKS
KVM: arm64: Use guest ID register values for the sake of emulation
KVM: arm64: Enable writable for ID_AA64DFR0_EL1 and ID_DFR0_EL1
KVM: arm64: Enable writable for ID_AA64PFR0_EL1
KVM: arm64: Refactor helper Macros for idreg desc
KVM: arm64: Enable writable for ID_AA64MMFR{0, 1, 2, 3}_EL1
KVM: arm64: selftests: Test for setting ID register from usersapce
Oliver Upton (2):
KVM: arm64: Reject attempts to set invalid debug arch version
KVM: arm64: Bump up the default KVM sanitised debug version to v8p8
Documentation/virt/kvm/api.rst | 26 +++
arch/arm64/include/asm/kvm_host.h | 2 +
arch/arm64/include/uapi/asm/kvm.h | 25 +++
arch/arm64/kvm/arm.c | 3 +
arch/arm64/kvm/sys_regs.c | 191 ++++++++++++------
include/uapi/linux/kvm.h | 2 +
tools/arch/arm64/include/uapi/asm/kvm.h | 25 +++
tools/include/uapi/linux/kvm.h | 2 +
tools/testing/selftests/kvm/Makefile | 1 +
.../selftests/kvm/aarch64/set_id_regs.c | 191 ++++++++++++++++++
10 files changed, 408 insertions(+), 60 deletions(-)
create mode 100644 tools/testing/selftests/kvm/aarch64/set_id_regs.c
base-commit: 5d0c230f1de8c7515b6567d9afba1f196fb4e2f4
--
2.41.0.585.gd2178a4bd4-goog
