| Message ID | 20210802192809.1851010-1-oupton@google.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | KVM: arm64: Use generic guest entry infrastructure | expand |
Friendly ping :) -- Thanks, Oliver On Mon, Aug 2, 2021 at 12:28 PM Oliver Upton <oupton@google.com> wrote: > > The arm64 kernel doesn't yet support the full generic entry > infrastructure. That being said, KVM/arm64 doesn't properly handle > TIF_NOTIFY_RESUME and could pick this up by switching to the generic > guest entry infrasturture. > > Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal > exits to userspace. > > Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't > currently support the generic infrastructure. > > Patch 3 replaces the open-coded entry handling with the generic xfer > function. > > This series was tested on an Ampere Mt. Jade reference system. The > series cleanly applies to kvm/queue (note that this is deliberate as the > generic kvm stats patches have not yet propagated to kvm-arm/queue) at > the following commit: > > 8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary") > > v1 -> v2: > - Address Jing's comment > - Carry Jing's r-b tag > > v2 -> v3: > - Roll all exit conditions into kvm_vcpu_exit_request() (Marc) > - Avoid needlessly checking for work twice (Marc) > > v1: http://lore.kernel.org/r/20210729195632.489978-1-oupton@google.com > v2: http://lore.kernel.org/r/20210729220916.1672875-1-oupton@google.com > > Oliver Upton (3): > KVM: arm64: Record number of signal exits as a vCPU stat > entry: KVM: Allow use of generic KVM entry w/o full generic support > KVM: arm64: Use generic KVM xfer to guest work function > > arch/arm64/include/asm/kvm_host.h | 1 + > arch/arm64/kvm/Kconfig | 1 + > arch/arm64/kvm/arm.c | 71 +++++++++++++++++++------------ > arch/arm64/kvm/guest.c | 1 + > include/linux/entry-kvm.h | 6 ++- > 5 files changed, 52 insertions(+), 28 deletions(-) > > -- > 2.32.0.554.ge1b32706d8-goog >
On Sun, 15 Aug 2021 08:50:09 +0100, Oliver Upton <oupton@google.com> wrote: > > Friendly ping :) Ah, thanks for reminding me of this. I'll have a look again early next week. M.
On Mon, 2 Aug 2021 19:28:06 +0000, Oliver Upton wrote: > The arm64 kernel doesn't yet support the full generic entry > infrastructure. That being said, KVM/arm64 doesn't properly handle > TIF_NOTIFY_RESUME and could pick this up by switching to the generic > guest entry infrasturture. > > Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal > exits to userspace. > > [...] Applied to next, thanks! [1/3] KVM: arm64: Record number of signal exits as a vCPU stat commit: fe5161d2c39b8c2801f0e786631460c6e8a1cae4 [2/3] entry: KVM: Allow use of generic KVM entry w/o full generic support commit: e1c6b9e1669e44fb7f9688e34e460b759e3b9187 [3/3] KVM: arm64: Use generic KVM xfer to guest work function commit: 6caa5812e2d126a0aa8a17816c1ba6f0a0c2b309 Cheers, M.
The arm64 kernel doesn't yet support the full generic entry infrastructure. That being said, KVM/arm64 doesn't properly handle TIF_NOTIFY_RESUME and could pick this up by switching to the generic guest entry infrasturture. Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal exits to userspace. Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't currently support the generic infrastructure. Patch 3 replaces the open-coded entry handling with the generic xfer function. This series was tested on an Ampere Mt. Jade reference system. The series cleanly applies to kvm/queue (note that this is deliberate as the generic kvm stats patches have not yet propagated to kvm-arm/queue) at the following commit: 8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary") v1 -> v2: - Address Jing's comment - Carry Jing's r-b tag v2 -> v3: - Roll all exit conditions into kvm_vcpu_exit_request() (Marc) - Avoid needlessly checking for work twice (Marc) v1: http://lore.kernel.org/r/20210729195632.489978-1-oupton@google.com v2: http://lore.kernel.org/r/20210729220916.1672875-1-oupton@google.com Oliver Upton (3): KVM: arm64: Record number of signal exits as a vCPU stat entry: KVM: Allow use of generic KVM entry w/o full generic support KVM: arm64: Use generic KVM xfer to guest work function arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/arm.c | 71 +++++++++++++++++++------------ arch/arm64/kvm/guest.c | 1 + include/linux/entry-kvm.h | 6 ++- 5 files changed, 52 insertions(+), 28 deletions(-)