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].
---
* v8 -> v9
- Rebase on v6.5-rc7.
- Don't allow writable on RES0 fields and those fields not exposed by KVM.
- Fixed build dependency issue for system register definition generation in
selftest.
* v7 -> v8
- Rebase on v6.5-rc5.
- Add reserved parameters to UAPI to get writable masks for future expansion.
- Import system regiesters definition automatic generation from kernel to
selftests.
- Refactor the selftest for verifying ID register writable from userspace to
cover all writable ID register fields.
* 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
[v7] https://lore.kernel.org/all/20230801152007.337272-1-jingzhangos@xxxxxxxxxx
[v8] https://lore.kernel.org/all/20230807162210.2528230-1-jingzhangos@xxxxxxxxxx
---
Jing Zhang (9):
KVM: arm64: Allow userspace to get the writable masks for feature ID
registers
KVM: arm64: Document KVM_ARM_GET_REG_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: Import automatic system register definition
generation from kernel
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 | 29 +
arch/arm64/include/asm/kvm_host.h | 2 +
arch/arm64/include/uapi/asm/kvm.h | 26 +
arch/arm64/kvm/arm.c | 7 +
arch/arm64/kvm/sys_regs.c | 207 +-
include/uapi/linux/kvm.h | 1 +
tools/arch/arm64/include/.gitignore | 1 +
tools/arch/arm64/include/asm/gpr-num.h | 26 +
tools/arch/arm64/include/asm/sysreg.h | 839 ++----
tools/arch/arm64/tools/gen-sysreg.awk | 336 +++
tools/arch/arm64/tools/sysreg | 2497 +++++++++++++++++
tools/testing/selftests/kvm/Makefile | 15 +-
.../selftests/kvm/aarch64/aarch32_id_regs.c | 4 +-
.../selftests/kvm/aarch64/debug-exceptions.c | 12 +-
.../selftests/kvm/aarch64/page_fault_test.c | 6 +-
.../selftests/kvm/aarch64/set_id_regs.c | 448 +++
.../selftests/kvm/lib/aarch64/processor.c | 6 +-
17 files changed, 3739 insertions(+), 723 deletions(-)
create mode 100644 tools/arch/arm64/include/.gitignore
create mode 100644 tools/arch/arm64/include/asm/gpr-num.h
create mode 100755 tools/arch/arm64/tools/gen-sysreg.awk
create mode 100644 tools/arch/arm64/tools/sysreg
create mode 100644 tools/testing/selftests/kvm/aarch64/set_id_regs.c
base-commit: 706a741595047797872e669b3101429ab8d378ef
--
2.42.0.rc1.204.g551eb34607-goog
