This series aims to stop contaminating the l2_hv structure with bits
that might have come from L1 state.
Patch 1 makes l2_hv read-only (mostly). It is now only changed when we
explicitly want to pass information to L1.
Patch 2 makes sure that L1 is not forwarded HFU interrupts when the
host has decided to disable any facilities (theoretical for now, since
HFSCR bits are always the same between L1/Ln).
Changes since v4:
- moved setting of the Cause bits under BOOK3S_INTERRUPT_H_FAC_UNAVAIL.
v4:
- now passing lpcr separately into load_l2_hv_regs to solve the
conflict with commit a19b70abc69a ("KVM: PPC: Book3S HV: Nested move
LPCR sanitising to sanitise_hv_regs");
- patch 2 now forwards a HEAI instead of injecting a Program.
https://lkml.kernel.org/r/20210722221240.2384655-1-farosas@xxxxxxxxxxxxx
v3:
- removed the sanitise functions;
- moved the entry code into a new load_l2_hv_regs and the exit code
into the existing save_hv_return_state;
- new patch: removes the cause bits when L0 has disabled the
corresponding facility.
https://lkml.kernel.org/r/20210415230948.3563415-1-farosas@xxxxxxxxxxxxx
v2:
- made the change more generic, not only applies to hfscr anymore;
- sanitisation is now done directly on the vcpu struct, l2_hv is left
unchanged.
https://lkml.kernel.org/r/20210406214645.3315819-1-farosas@xxxxxxxxxxxxx
v1:
https://lkml.kernel.org/r/20210305231055.2913892-1-farosas@xxxxxxxxxxxxx
Fabiano Rosas (2):
KVM: PPC: Book3S HV: Sanitise vcpu registers in nested path
KVM: PPC: Book3S HV: Stop forwarding all HFUs to L1
arch/powerpc/kvm/book3s_hv_nested.c | 118 ++++++++++++++++------------
1 file changed, 68 insertions(+), 50 deletions(-)
--
2.29.2
