From patchwork Thu Dec 28 10:51:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi-De Wu X-Patchwork-Id: 13505865 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 650D26D24; Thu, 28 Dec 2023 10:52:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="mp1DGRX+" X-UUID: 1d48162aa56f11ee9e680517dc993faa-20231228 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=GClm9IO7NJgwV47kSxaXujuU8xe1dpAmeELF7eE1ujk=; b=mp1DGRX+EDQIE26YAbd2MyepoRUDJuxdnTDBChq5pk+UooiChJ1w05ZFFK4pASPN2wOIwvSxGy/IZxuXtnE4oyHvP/+WKdcWljw/9M1xddWx+MoPuhxbEXR/UspRMEqK7/0mQsSN6RO2ZL5jCtMvslFxXhaJXKkk8JLlf6h83kc=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:91e27581-c34d-4e27-986d-40cf5131a56e,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:5d391d7,CLOUDID:bb694382-8d4f-477b-89d2-1e3bdbef96d1,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR: NO,DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_ULN,TF_CID_SPAM_SNR X-UUID: 1d48162aa56f11ee9e680517dc993faa-20231228 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1944825578; Thu, 28 Dec 2023 18:51:54 +0800 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by MTKMBS14N1.mediatek.inc (172.21.101.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Thu, 28 Dec 2023 18:51:54 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Thu, 28 Dec 2023 18:51:54 +0800 From: Yi-De Wu To: Yingshiuan Pan , Ze-Yu Wang , Yi-De Wu , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Jonathan Corbet , Catalin Marinas , Wihl Deacon , Steven Rostedt , "Masami Hiramatsu" , Mathieu Desnoyers , Richard Cochran , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , David Bradil , Trilok Soni , Jade Shih , Ivan Tseng , My Chuang , Shawn Hsiao , PeiLun Suei , Liju Chen , "Willix Yeh" , Kevenny Hsieh Subject: [PATCH v8 17/20] virt: geniezone: Add memory relinquish support Date: Thu, 28 Dec 2023 18:51:44 +0800 Message-ID: <20231228105147.13752-18-yi-de.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20231228105147.13752-1-yi-de.wu@mediatek.com> References: <20231228105147.13752-1-yi-de.wu@mediatek.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10--6.462700-8.000000 X-TMASE-MatchedRID: FAqaJEPp0bkCsjHNBKjIykKcYi5Qw/RVQBnqdxuJ5SBGL0g1nVmkYXB4 4IkzjfYyR3nAM7y+sxF8f1Kw27wTO10U3RPW+iLPdXz3l78F3Ym2McZY43zJ47UV4VfJ6SB08bf 335SL+13q24xRTqfKLQ+BePuQCx01y6xJm0/fVixVTfJWlqPdDEEZVEiY7PGfa0TOsL14A2lh4r /wCPzhZOGXhQ8jxGrgu2drAUtvuhvIs9Qr+U/JpgKDWtq/hHcNf2g6KJZtxl1+YesuCgkiXA+Pz ND1U86eKsiucgwl76rEyq0r6O7kZx8TzIzimOwPC24oEZ6SpSk6XEE7Yhw4FnIhDzh4rNQgpk/0 AOc358E2HoKUeqcpn7dFZQ+Cgj32Y2LpRK90P0o= X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--6.462700-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: 58BCEAA5F206AE8E31147776ED6DBC96126A9E01B27FC9207549801019057C332000:8 X-MTK: N From: "Jerry Wang" Unpin the pages when VM relinquish the pages or is destroyed. Signed-off-by: Jerry Wang Signed-off-by: Yingshiuan Pan Signed-off-by: Liju-Clr Chen Signed-off-by: Yi-De Wu --- drivers/virt/geniezone/gzvm_exception.c | 23 +++++++++++++++ drivers/virt/geniezone/gzvm_mmu.c | 39 +++++++++++++++++++++++++ drivers/virt/geniezone/gzvm_vcpu.c | 6 ++-- include/linux/gzvm_drv.h | 2 ++ include/uapi/linux/gzvm.h | 5 ++++ 5 files changed, 73 insertions(+), 2 deletions(-) diff --git a/drivers/virt/geniezone/gzvm_exception.c b/drivers/virt/geniezone/gzvm_exception.c index 31fdb4ae8db4..af26d1c82791 100644 --- a/drivers/virt/geniezone/gzvm_exception.c +++ b/drivers/virt/geniezone/gzvm_exception.c @@ -37,3 +37,26 @@ bool gzvm_handle_guest_exception(struct gzvm_vcpu *vcpu) else return false; } + +/** + * gzvm_handle_guest_hvc() - Handle guest hvc + * @vcpu: Pointer to struct gzvm_vcpu struct + * Return: + * * true - This hvc has been processed, no need to back to VMM. + * * false - This hvc has not been processed, require userspace. + */ +bool gzvm_handle_guest_hvc(struct gzvm_vcpu *vcpu) +{ + unsigned long ipa; + int ret; + + switch (vcpu->run->hypercall.args[0]) { + case GZVM_HVC_MEM_RELINQUISH: + ipa = vcpu->run->hypercall.args[1]; + ret = gzvm_handle_relinquish(vcpu, ipa); + return (ret == 0) ? true : false; + default: + break; + } + return false; +} diff --git a/drivers/virt/geniezone/gzvm_mmu.c b/drivers/virt/geniezone/gzvm_mmu.c index 857cc68f76dc..ab0afec48381 100644 --- a/drivers/virt/geniezone/gzvm_mmu.c +++ b/drivers/virt/geniezone/gzvm_mmu.c @@ -141,6 +141,26 @@ static int gzvm_insert_ppage(struct gzvm *vm, struct gzvm_pinned_page *ppage) return 0; } +/* Invoker of this function is responsible for locking */ +static int gzvm_remove_ppage(struct gzvm *vm, phys_addr_t ipa) +{ + struct gzvm_pinned_page *ppage; + struct rb_node *node; + + node = rb_find((void *)ipa, &vm->pinned_pages, rb_ppage_cmp); + + if (node) + rb_erase(node, &vm->pinned_pages); + else + return 0; + + ppage = container_of(node, struct gzvm_pinned_page, node); + unpin_user_pages_dirty_lock(&ppage->page, 1, true); + kfree(ppage); + + return 0; +} + static int pin_one_page(struct gzvm *vm, unsigned long hva, u64 gpa) { unsigned int flags = FOLL_HWPOISON | FOLL_LONGTERM | FOLL_WRITE; @@ -171,6 +191,25 @@ static int pin_one_page(struct gzvm *vm, unsigned long hva, u64 gpa) return 0; } +/** + * gzvm_handle_relinquish() - Handle memory relinquish request from hypervisor + * + * @vcpu: Pointer to struct gzvm_vcpu_run in userspace + * @ipa: Start address(gpa) of a reclaimed page + * + * Return: Always return 0 because there are no cases of failure + */ +int gzvm_handle_relinquish(struct gzvm_vcpu *vcpu, phys_addr_t ipa) +{ + struct gzvm *vm = vcpu->gzvm; + + mutex_lock(&vm->mem_lock); + gzvm_remove_ppage(vm, ipa); + mutex_unlock(&vm->mem_lock); + + return 0; +} + static int handle_block_demand_page(struct gzvm *vm, int memslot_id, u64 gfn) { unsigned long hva; diff --git a/drivers/virt/geniezone/gzvm_vcpu.c b/drivers/virt/geniezone/gzvm_vcpu.c index 455ae2e4285c..86c690749277 100644 --- a/drivers/virt/geniezone/gzvm_vcpu.c +++ b/drivers/virt/geniezone/gzvm_vcpu.c @@ -113,12 +113,14 @@ static long gzvm_vcpu_run(struct gzvm_vcpu *vcpu, void __user *argp) * it's geniezone's responsibility to fill corresponding data * structure */ + case GZVM_EXIT_HYPERCALL: + if (!gzvm_handle_guest_hvc(vcpu)) + need_userspace = true; + break; case GZVM_EXIT_EXCEPTION: if (!gzvm_handle_guest_exception(vcpu)) need_userspace = true; break; - case GZVM_EXIT_HYPERCALL: - fallthrough; case GZVM_EXIT_DEBUG: fallthrough; case GZVM_EXIT_FAIL_ENTRY: diff --git a/include/linux/gzvm_drv.h b/include/linux/gzvm_drv.h index 116d1d7c1562..17f5fb9d843d 100644 --- a/include/linux/gzvm_drv.h +++ b/include/linux/gzvm_drv.h @@ -175,6 +175,8 @@ int gzvm_arch_inform_exit(u16 vm_id); int gzvm_find_memslot(struct gzvm *vm, u64 gpa); int gzvm_handle_page_fault(struct gzvm_vcpu *vcpu); bool gzvm_handle_guest_exception(struct gzvm_vcpu *vcpu); +int gzvm_handle_relinquish(struct gzvm_vcpu *vcpu, phys_addr_t ipa); +bool gzvm_handle_guest_hvc(struct gzvm_vcpu *vcpu); int gzvm_arch_create_device(u16 vm_id, struct gzvm_create_device *gzvm_dev); int gzvm_arch_inject_irq(struct gzvm *gzvm, unsigned int vcpu_idx, diff --git a/include/uapi/linux/gzvm.h b/include/uapi/linux/gzvm.h index f858b04bf7b9..a98787a18c36 100644 --- a/include/uapi/linux/gzvm.h +++ b/include/uapi/linux/gzvm.h @@ -193,6 +193,11 @@ enum { GZVM_EXCEPTION_PAGE_FAULT = 0x1, }; +/* hypercall definitions of GZVM_EXIT_HYPERCALL */ +enum { + GZVM_HVC_MEM_RELINQUISH = 0xc6000009, +}; + /** * struct gzvm_vcpu_run: Same purpose as kvm_run, this struct is * shared between userspace, kernel and