Hi, Any comments on this patchset? Anything specific to be addressed before it could be considered for inclusion? Regards, Bharata. On Mon, Oct 19, 2020 at 04:56:40PM +0530, Bharata B Rao wrote: > This patchset adds support for the new hcall H_RPT_INVALIDATE > (currently handles nested case only) and replaces the nested tlb flush > calls with this new hcall if the support for the same exists. > > Changes in v1: > ------------- > - Removed the bits that added the FW_FEATURE_RPT_INVALIDATE feature > as they are already upstream. > > v0: https://lore.kernel.org/linuxppc-dev/20200703104420.21349-1-bharata@xxxxxxxxxxxxx/T/#m1800c5f5b3d4f6a154ae58fc1c617c06f286358f > > H_RPT_INVALIDATE > ================ > Syntax: > int64 /* H_Success: Return code on successful completion */ > /* H_Busy - repeat the call with the same */ > /* H_Parameter, H_P2, H_P3, H_P4, H_P5 : Invalid parameters */ > hcall(const uint64 H_RPT_INVALIDATE, /* Invalidate RPT translation lookaside information */ > uint64 pid, /* PID/LPID to invalidate */ > uint64 target, /* Invalidation target */ > uint64 type, /* Type of lookaside information */ > uint64 pageSizes, /* Page sizes */ > uint64 start, /* Start of Effective Address (EA) range (inclusive) */ > uint64 end) /* End of EA range (exclusive) */ > > Invalidation targets (target) > ----------------------------- > Core MMU 0x01 /* All virtual processors in the partition */ > Core local MMU 0x02 /* Current virtual processor */ > Nest MMU 0x04 /* All nest/accelerator agents in use by the partition */ > > A combination of the above can be specified, except core and core local. > > Type of translation to invalidate (type) > --------------------------------------- > NESTED 0x0001 /* Invalidate nested guest partition-scope */ > TLB 0x0002 /* Invalidate TLB */ > PWC 0x0004 /* Invalidate Page Walk Cache */ > PRT 0x0008 /* Invalidate Process Table Entries if NESTED is clear */ > PAT 0x0008 /* Invalidate Partition Table Entries if NESTED is set */ > > A combination of the above can be specified. > > Page size mask (pageSizes) > -------------------------- > 4K 0x01 > 64K 0x02 > 2M 0x04 > 1G 0x08 > All sizes (-1UL) > > A combination of the above can be specified. > All page sizes can be selected with -1. > > Semantics: Invalidate radix tree lookaside information > matching the parameters given. > * Return H_P2, H_P3 or H_P4 if target, type, or pageSizes parameters are > different from the defined values. > * Return H_PARAMETER if NESTED is set and pid is not a valid nested > LPID allocated to this partition > * Return H_P5 if (start, end) doesn't form a valid range. Start and end > should be a valid Quadrant address and end > start. > * Return H_NotSupported if the partition is not in running in radix > translation mode. > * May invalidate more translation information than requested. > * If start = 0 and end = -1, set the range to cover all valid addresses. > Else start and end should be aligned to 4kB (lower 11 bits clear). > * If NESTED is clear, then invalidate process scoped lookaside information. > Else pid specifies a nested LPID, and the invalidation is performed > on nested guest partition table and nested guest partition scope real > addresses. > * If pid = 0 and NESTED is clear, then valid addresses are quadrant 3 and > quadrant 0 spaces, Else valid addresses are quadrant 0. > * Pages which are fully covered by the range are to be invalidated. > Those which are partially covered are considered outside invalidation > range, which allows a caller to optimally invalidate ranges that may > contain mixed page sizes. > * Return H_SUCCESS on success. > > Bharata B Rao (2): > KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE (nested case > only) > KVM: PPC: Book3S HV: Use H_RPT_INVALIDATE in nested KVM > > Documentation/virt/kvm/api.rst | 17 +++ > .../include/asm/book3s/64/tlbflush-radix.h | 18 +++ > arch/powerpc/include/asm/kvm_book3s.h | 3 + > arch/powerpc/kvm/book3s_64_mmu_radix.c | 26 ++++- > arch/powerpc/kvm/book3s_hv.c | 32 ++++++ > arch/powerpc/kvm/book3s_hv_nested.c | 107 +++++++++++++++++- > arch/powerpc/kvm/powerpc.c | 3 + > arch/powerpc/mm/book3s64/radix_tlb.c | 4 - > include/uapi/linux/kvm.h | 1 + > 9 files changed, 200 insertions(+), 11 deletions(-) > > -- > 2.26.2
