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.
It is based on v6.5-rc1 which contains infrastructure for writable idregs.
A selftest is added to verify that KVM handles the writings from user space
correctly.
A relevant patch from Oliver is picked from [3].
---
* 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 v6.4-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
---
Jing Zhang (5):
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: Enable writable for ID_AA64MMFR{0, 1, 2, 3}_EL1
KVM: arm64: selftests: Test for setting ID register from usersapce
Oliver Upton (1):
KVM: arm64: Reject attempts to set invalid debug arch version
arch/arm64/kvm/sys_regs.c | 84 +++++++--
tools/testing/selftests/kvm/Makefile | 1 +
.../selftests/kvm/aarch64/set_id_regs.c | 163 ++++++++++++++++++
3 files changed, 232 insertions(+), 16 deletions(-)
create mode 100644 tools/testing/selftests/kvm/aarch64/set_id_regs.c
base-commit: 06c2afb862f9da8dc5efa4b6076a0e48c3fbaaa5
--
2.41.0.255.g8b1d071c50-goog
