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Wed, 16 Dec 2020 08:54:51 +0000 (GMT) Received: from d06av24.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id CC6114204B; Wed, 16 Dec 2020 08:54:49 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.85.116.220]) by d06av24.portsmouth.uk.ibm.com (Postfix) with ESMTP; Wed, 16 Dec 2020 08:54:49 +0000 (GMT) From: Bharata B Rao To: kvm-ppc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v2 0/2] Support for H_RPT_INVALIDATE in PowerPC KVM Date: Wed, 16 Dec 2020 14:24:45 +0530 Message-Id: <20201216085447.1265433-1-bharata@linux.ibm.com> X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2020-12-16_02:2020-12-15, 2020-12-16 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 phishscore=0 spamscore=0 priorityscore=1501 mlxscore=0 malwarescore=0 mlxlogscore=999 clxscore=1015 impostorscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012160051 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: aneesh.kumar@linux.ibm.com, npiggin@gmail.com, Bharata B Rao , david@gibson.dropbear.id.au Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This patchset adds support for the new hcall H_RPT_INVALIDATE and replaces the nested tlb flush calls with this new hcall if support for the same exists. Changes in v2: ------------- - Not enabling the hcall by default now, userspace can enable it when required. - Added implementation for process-scoped invalidations in the hcall. v1: https://lore.kernel.org/linuxppc-dev/20201019112642.53016-1-bharata@linux.ibm.com/T/#t 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 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 | 27 +++- arch/powerpc/kvm/book3s_hv.c | 121 ++++++++++++++++++ arch/powerpc/kvm/book3s_hv_nested.c | 106 ++++++++++++++- arch/powerpc/kvm/powerpc.c | 3 + arch/powerpc/mm/book3s64/radix_tlb.c | 4 - include/uapi/linux/kvm.h | 1 + 9 files changed, 289 insertions(+), 11 deletions(-) -- 2.26.2