On 2019-07-09 05:25, Bharata B Rao wrote:
Register the new memslot with UV during plug and unregister the memslot during unplug. Signed-off-by: Bharata B Rao <bharata@xxxxxxxxxxxxx> Acked-by: Paul Mackerras <paulus@xxxxxxxxxx>
Reviewed-by: Janani Janakiraman <janani@xxxxxxxxxxxxx>
--- arch/powerpc/include/asm/ultravisor-api.h | 1 + arch/powerpc/include/asm/ultravisor.h | 7 +++++++ arch/powerpc/kvm/book3s_hv.c | 19 +++++++++++++++++++ 3 files changed, 27 insertions(+) diff --git a/arch/powerpc/include/asm/ultravisor-api.h b/arch/powerpc/include/asm/ultravisor-api.h index 07b7d638e7af..d6d6eb2e6e6b 100644 --- a/arch/powerpc/include/asm/ultravisor-api.h +++ b/arch/powerpc/include/asm/ultravisor-api.h @@ -21,6 +21,7 @@ #define UV_WRITE_PATE 0xF104 #define UV_RETURN 0xF11C #define UV_REGISTER_MEM_SLOT 0xF120 +#define UV_UNREGISTER_MEM_SLOT 0xF124 #define UV_PAGE_IN 0xF128 #define UV_PAGE_OUT 0xF12C diff --git a/arch/powerpc/include/asm/ultravisor.h b/arch/powerpc/include/asm/ultravisor.h index b46042f1aa8f..fe45be9ee63b 100644 --- a/arch/powerpc/include/asm/ultravisor.h +++ b/arch/powerpc/include/asm/ultravisor.h @@ -70,6 +70,13 @@ static inline int uv_register_mem_slot(u64 lpid, u64 start_gpa, u64 size, return ucall(UV_REGISTER_MEM_SLOT, retbuf, lpid, start_gpa, size, flags, slotid); } + +static inline int uv_unregister_mem_slot(u64 lpid, u64 slotid) +{ + unsigned long retbuf[UCALL_BUFSIZE]; + + return ucall(UV_UNREGISTER_MEM_SLOT, retbuf, lpid, slotid); +} #endif /* !__ASSEMBLY__ */ #endif /* _ASM_POWERPC_ULTRAVISOR_H */diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.cindex b8f801d00ad4..7cbb5edaed01 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -77,6 +77,7 @@ #include <asm/hw_breakpoint.h> #include <asm/kvm_host.h> #include <asm/kvm_book3s_hmm.h> +#include <asm/ultravisor.h> #include "book3s.h" @@ -4504,6 +4505,24 @@ static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm, if (change == KVM_MR_FLAGS_ONLY && kvm_is_radix(kvm) && ((new->flags ^ old->flags) & KVM_MEM_LOG_DIRTY_PAGES)) kvmppc_radix_flush_memslot(kvm, old); + /* + * If UV hasn't yet called H_SVM_INIT_START, don't register memslots. + */ + if (!kvm->arch.secure_guest) + return; + + /* + * TODO: Handle KVM_MR_MOVE + */ + if (change == KVM_MR_CREATE) { + uv_register_mem_slot(kvm->arch.lpid, + new->base_gfn << PAGE_SHIFT, + new->npages * PAGE_SIZE, + 0, + new->id); + } else if (change == KVM_MR_DELETE) { + uv_unregister_mem_slot(kvm->arch.lpid, old->id); + } } /*
