On 2/24/22 03:46, Peter Maydell wrote:
When we're using KVM, the PSCI implementation is provided by the kernel, but QEMU has to tell the guest about it via the device tree. Currently we look at the KVM_CAP_ARM_PSCI_0_2 capability to determine if the kernel is providing at least PSCI 0.2, but if the kernel provides a newer version than that we will still only tell the guest it has PSCI 0.2. (This is fairly harmless; it just means the guest won't use newer parts of the PSCI API.)The kernel exposes the specific PSCI version it is implementing via the ONE_REG API; use this to report in the dtb that the PSCI implementation is 1.0-compatible if appropriate. (The device tree binding currently only distinguishes "pre-0.2", "0.2-compatible" and "1.0-compatible".) Signed-off-by: Peter Maydell<peter.mayd...@linaro.org> --- Based-on:20220213035753.34577-1-akihiko.od...@gmail.com ("[PATCH v2] target/arm: Support PSCI 1.1 and SMCCC 1.0") though note that to compile on arm hosts you'll need the bugfix to that patch from which I describe in a reply to it. target/arm/kvm-consts.h | 1 + hw/arm/boot.c | 5 ++--- target/arm/kvm64.c | 12 ++++++++++++ 3 files changed, 15 insertions(+), 3 deletions(-)
Reviewed-by: Richard Henderson <richard.hender...@linaro.org> r~
