From patchwork Tue Apr 30 19:50:55 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Haitao Huang X-Patchwork-Id: 13649925 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.16]) (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 B7F1D19DF45; Tue, 30 Apr 2024 19:51:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.16 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714506671; cv=none; b=edRVdfF1OhhZshw32SL1PiKpc/PaxG/QzEXu86f7J3n6aT37LdbHQWI4zoWCOgJvlQDbsxqtAMLLCdzHh9yww1QparYG6oWtlZkxbi/fvxD88togN61IgwO+10U2Zz1SCjwmCTY1C2tWsAn2c52tBnpu8muv8yzcQHWQ3YP+o9Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714506671; c=relaxed/simple; bh=GPZvGvi6PM3uewi5xKf/fHnXTlqZU38tXJf5pvUdLGY=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=k+BuCv1VrUuQBE2nwJQRd4ifnAD3ylLmJfixtd6FfIlq9wL5bV2zo9VG8J9q91I2SFZO5tDtxJ1wpAIx2P16GX5CMTeb2q3I+Sz8yBWrKYD1wC5LOyVFh1jjkagl7JpTCSMtFPTXAZfFvgqscmLbN4iMQvgPGcenHlOPv9pUj0s= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=HQGlaccv; arc=none smtp.client-ip=198.175.65.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="HQGlaccv" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1714506670; x=1746042670; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GPZvGvi6PM3uewi5xKf/fHnXTlqZU38tXJf5pvUdLGY=; b=HQGlaccvqisCvw+U79xf5XEHFwVcQIyRgGOqJeWTOn0GYg6dxv4uxA1F ZxLPXlq2Q3N7xxFxU/kUARH+1qy/54+l9Kwhd0gZlpUPNuIPrHEg05e9x vXi8z18hy7/TxLBVYVmrUnK8Q2HSnlWvn1l09cs+jJ3tpuJPnaFFvG7m/ SB8TgWfl6OfX4VJl+YSdjrUujVap5qkyGD2IKCwVpBn25QKlAb1aenTTx 3nKUvj2ZXEc1S9S0VddkDWod4CdnbP/1NcY2RicbCAgHFOaxVfM21eSUS 1e0BkoS99izdnvF5P8wf+7tMqC2DKVsCelu5dELKK08Yn3tVaTkXA03j3 Q==; X-CSE-ConnectionGUID: c2F3+0HcTzWfulIqrI8SWg== X-CSE-MsgGUID: IQ9p5ODPQHKkWRT4xbINvg== X-IronPort-AV: E=McAfee;i="6600,9927,11060"; a="10355568" X-IronPort-AV: E=Sophos;i="6.07,243,1708416000"; d="scan'208";a="10355568" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by orvoesa108.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 30 Apr 2024 12:51:09 -0700 X-CSE-ConnectionGUID: xhfAvDGNRUGG+vdA0LI1CQ== X-CSE-MsgGUID: oklgzl/9RIyKNWwJdY9GyA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.07,243,1708416000"; d="scan'208";a="31280297" Received: from b4969161e530.jf.intel.com ([10.165.56.46]) by orviesa003.jf.intel.com with ESMTP; 30 Apr 2024 12:51:09 -0700 From: Haitao Huang To: jarkko@kernel.org, dave.hansen@linux.intel.com, kai.huang@intel.com, tj@kernel.org, mkoutny@suse.com, linux-kernel@vger.kernel.org, linux-sgx@vger.kernel.org, x86@kernel.org, cgroups@vger.kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, hpa@zytor.com, sohil.mehta@intel.com, tim.c.chen@linux.intel.com Cc: zhiquan1.li@intel.com, kristen@linux.intel.com, seanjc@google.com, zhanb@microsoft.com, anakrish@microsoft.com, mikko.ylinen@linux.intel.com, yangjie@microsoft.com, chrisyan@microsoft.com Subject: [PATCH v13 01/14] x86/sgx: Replace boolean parameters with enums Date: Tue, 30 Apr 2024 12:50:55 -0700 Message-Id: <20240430195108.5676-2-haitao.huang@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240430195108.5676-1-haitao.huang@linux.intel.com> References: <20240430195108.5676-1-haitao.huang@linux.intel.com> Precedence: bulk X-Mailing-List: linux-sgx@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Replace boolean parameters for 'reclaim' in the function sgx_alloc_epc_page() and its callers with an enum. Also opportunistically remove non-static declaration of __sgx_alloc_epc_page() and a typo Signed-off-by: Haitao Huang Suggested-by: Jarkko Sakkinen Suggested-by: Dave Hansen Reviewed-by: Jarkko Sakkinen Reviewed-by: Kai Huang Tested-by: Jarkko Sakkinen --- arch/x86/kernel/cpu/sgx/encl.c | 12 ++++++------ arch/x86/kernel/cpu/sgx/encl.h | 4 ++-- arch/x86/kernel/cpu/sgx/ioctl.c | 10 +++++----- arch/x86/kernel/cpu/sgx/main.c | 14 +++++++------- arch/x86/kernel/cpu/sgx/sgx.h | 13 +++++++++++-- arch/x86/kernel/cpu/sgx/virt.c | 2 +- 6 files changed, 32 insertions(+), 23 deletions(-) diff --git a/arch/x86/kernel/cpu/sgx/encl.c b/arch/x86/kernel/cpu/sgx/encl.c index 279148e72459..f474179b6f77 100644 --- a/arch/x86/kernel/cpu/sgx/encl.c +++ b/arch/x86/kernel/cpu/sgx/encl.c @@ -217,7 +217,7 @@ static struct sgx_epc_page *sgx_encl_eldu(struct sgx_encl_page *encl_page, struct sgx_epc_page *epc_page; int ret; - epc_page = sgx_alloc_epc_page(encl_page, false); + epc_page = sgx_alloc_epc_page(encl_page, SGX_NO_RECLAIM); if (IS_ERR(epc_page)) return epc_page; @@ -359,14 +359,14 @@ static vm_fault_t sgx_encl_eaug_page(struct vm_area_struct *vma, goto err_out_unlock; } - epc_page = sgx_alloc_epc_page(encl_page, false); + epc_page = sgx_alloc_epc_page(encl_page, SGX_NO_RECLAIM); if (IS_ERR(epc_page)) { if (PTR_ERR(epc_page) == -EBUSY) vmret = VM_FAULT_NOPAGE; goto err_out_unlock; } - va_page = sgx_encl_grow(encl, false); + va_page = sgx_encl_grow(encl, SGX_NO_RECLAIM); if (IS_ERR(va_page)) { if (PTR_ERR(va_page) == -EBUSY) vmret = VM_FAULT_NOPAGE; @@ -1232,8 +1232,8 @@ void sgx_zap_enclave_ptes(struct sgx_encl *encl, unsigned long addr) /** * sgx_alloc_va_page() - Allocate a Version Array (VA) page - * @reclaim: Reclaim EPC pages directly if none available. Enclave - * mutex should not be held if this is set. + * @reclaim: Whether reclaim EPC pages directly if none available. Enclave + * mutex should not be held for SGX_DO_RECLAIM. * * Allocate a free EPC page and convert it to a Version Array (VA) page. * @@ -1241,7 +1241,7 @@ void sgx_zap_enclave_ptes(struct sgx_encl *encl, unsigned long addr) * a VA page, * -errno otherwise */ -struct sgx_epc_page *sgx_alloc_va_page(bool reclaim) +struct sgx_epc_page *sgx_alloc_va_page(enum sgx_reclaim reclaim) { struct sgx_epc_page *epc_page; int ret; diff --git a/arch/x86/kernel/cpu/sgx/encl.h b/arch/x86/kernel/cpu/sgx/encl.h index f94ff14c9486..fe15ade02ca1 100644 --- a/arch/x86/kernel/cpu/sgx/encl.h +++ b/arch/x86/kernel/cpu/sgx/encl.h @@ -116,14 +116,14 @@ struct sgx_encl_page *sgx_encl_page_alloc(struct sgx_encl *encl, unsigned long offset, u64 secinfo_flags); void sgx_zap_enclave_ptes(struct sgx_encl *encl, unsigned long addr); -struct sgx_epc_page *sgx_alloc_va_page(bool reclaim); +struct sgx_epc_page *sgx_alloc_va_page(enum sgx_reclaim reclaim); unsigned int sgx_alloc_va_slot(struct sgx_va_page *va_page); void sgx_free_va_slot(struct sgx_va_page *va_page, unsigned int offset); bool sgx_va_page_full(struct sgx_va_page *va_page); void sgx_encl_free_epc_page(struct sgx_epc_page *page); struct sgx_encl_page *sgx_encl_load_page(struct sgx_encl *encl, unsigned long addr); -struct sgx_va_page *sgx_encl_grow(struct sgx_encl *encl, bool reclaim); +struct sgx_va_page *sgx_encl_grow(struct sgx_encl *encl, enum sgx_reclaim reclaim); void sgx_encl_shrink(struct sgx_encl *encl, struct sgx_va_page *va_page); #endif /* _X86_ENCL_H */ diff --git a/arch/x86/kernel/cpu/sgx/ioctl.c b/arch/x86/kernel/cpu/sgx/ioctl.c index b65ab214bdf5..793a0ba2cb16 100644 --- a/arch/x86/kernel/cpu/sgx/ioctl.c +++ b/arch/x86/kernel/cpu/sgx/ioctl.c @@ -17,7 +17,7 @@ #include "encl.h" #include "encls.h" -struct sgx_va_page *sgx_encl_grow(struct sgx_encl *encl, bool reclaim) +struct sgx_va_page *sgx_encl_grow(struct sgx_encl *encl, enum sgx_reclaim reclaim) { struct sgx_va_page *va_page = NULL; void *err; @@ -64,7 +64,7 @@ static int sgx_encl_create(struct sgx_encl *encl, struct sgx_secs *secs) struct file *backing; long ret; - va_page = sgx_encl_grow(encl, true); + va_page = sgx_encl_grow(encl, SGX_DO_RECLAIM); if (IS_ERR(va_page)) return PTR_ERR(va_page); else if (va_page) @@ -83,7 +83,7 @@ static int sgx_encl_create(struct sgx_encl *encl, struct sgx_secs *secs) encl->backing = backing; - secs_epc = sgx_alloc_epc_page(&encl->secs, true); + secs_epc = sgx_alloc_epc_page(&encl->secs, SGX_DO_RECLAIM); if (IS_ERR(secs_epc)) { ret = PTR_ERR(secs_epc); goto err_out_backing; @@ -269,13 +269,13 @@ static int sgx_encl_add_page(struct sgx_encl *encl, unsigned long src, if (IS_ERR(encl_page)) return PTR_ERR(encl_page); - epc_page = sgx_alloc_epc_page(encl_page, true); + epc_page = sgx_alloc_epc_page(encl_page, SGX_DO_RECLAIM); if (IS_ERR(epc_page)) { kfree(encl_page); return PTR_ERR(epc_page); } - va_page = sgx_encl_grow(encl, true); + va_page = sgx_encl_grow(encl, SGX_DO_RECLAIM); if (IS_ERR(va_page)) { ret = PTR_ERR(va_page); goto err_out_free; diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c index 166692f2d501..d219f14365d4 100644 --- a/arch/x86/kernel/cpu/sgx/main.c +++ b/arch/x86/kernel/cpu/sgx/main.c @@ -463,14 +463,14 @@ static struct sgx_epc_page *__sgx_alloc_epc_page_from_node(int nid) /** * __sgx_alloc_epc_page() - Allocate an EPC page * - * Iterate through NUMA nodes and reserve ia free EPC page to the caller. Start + * Iterate through NUMA nodes and reserve a free EPC page to the caller. Start * from the NUMA node, where the caller is executing. * * Return: * - an EPC page: A borrowed EPC pages were available. * - NULL: Out of EPC pages. */ -struct sgx_epc_page *__sgx_alloc_epc_page(void) +static struct sgx_epc_page *__sgx_alloc_epc_page(void) { struct sgx_epc_page *page; int nid_of_current = numa_node_id(); @@ -542,12 +542,12 @@ int sgx_unmark_page_reclaimable(struct sgx_epc_page *page) /** * sgx_alloc_epc_page() - Allocate an EPC page * @owner: the owner of the EPC page - * @reclaim: reclaim pages if necessary + * @reclaim: whether reclaim pages if necessary * * Iterate through EPC sections and borrow a free EPC page to the caller. When a * page is no longer needed it must be released with sgx_free_epc_page(). If - * @reclaim is set to true, directly reclaim pages when we are out of pages. No - * mm's can be locked when @reclaim is set to true. + * @reclaim is set to SGX_DO_RECLAIM, directly reclaim pages when we are out of + * pages. No mm's can be locked for SGX_DO_RECLAIM. * * Finally, wake up ksgxd when the number of pages goes below the watermark * before returning back to the caller. @@ -556,7 +556,7 @@ int sgx_unmark_page_reclaimable(struct sgx_epc_page *page) * an EPC page, * -errno on error */ -struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim) +struct sgx_epc_page *sgx_alloc_epc_page(void *owner, enum sgx_reclaim reclaim) { struct sgx_epc_page *page; @@ -570,7 +570,7 @@ struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim) if (list_empty(&sgx_active_page_list)) return ERR_PTR(-ENOMEM); - if (!reclaim) { + if (reclaim == SGX_NO_RECLAIM) { page = ERR_PTR(-EBUSY); break; } diff --git a/arch/x86/kernel/cpu/sgx/sgx.h b/arch/x86/kernel/cpu/sgx/sgx.h index d2dad21259a8..ca34cd4f58ac 100644 --- a/arch/x86/kernel/cpu/sgx/sgx.h +++ b/arch/x86/kernel/cpu/sgx/sgx.h @@ -29,6 +29,16 @@ /* Pages on free list */ #define SGX_EPC_PAGE_IS_FREE BIT(1) +/** + * enum sgx_reclaim - Whether EPC reclamation is allowed within a function. + * %SGX_NO_RECLAIM: Do not reclaim EPC pages. + * %SGX_DO_RECLAIM: Reclaim EPC pages as needed. + */ +enum sgx_reclaim { + SGX_NO_RECLAIM, + SGX_DO_RECLAIM +}; + struct sgx_epc_page { unsigned int section; u16 flags; @@ -83,13 +93,12 @@ static inline void *sgx_get_epc_virt_addr(struct sgx_epc_page *page) return section->virt_addr + index * PAGE_SIZE; } -struct sgx_epc_page *__sgx_alloc_epc_page(void); void sgx_free_epc_page(struct sgx_epc_page *page); void sgx_reclaim_direct(void); void sgx_mark_page_reclaimable(struct sgx_epc_page *page); int sgx_unmark_page_reclaimable(struct sgx_epc_page *page); -struct sgx_epc_page *sgx_alloc_epc_page(void *owner, bool reclaim); +struct sgx_epc_page *sgx_alloc_epc_page(void *owner, enum sgx_reclaim reclaim); void sgx_ipi_cb(void *info); diff --git a/arch/x86/kernel/cpu/sgx/virt.c b/arch/x86/kernel/cpu/sgx/virt.c index 7aaa3652e31d..e7fdc3a9abae 100644 --- a/arch/x86/kernel/cpu/sgx/virt.c +++ b/arch/x86/kernel/cpu/sgx/virt.c @@ -46,7 +46,7 @@ static int __sgx_vepc_fault(struct sgx_vepc *vepc, if (epc_page) return 0; - epc_page = sgx_alloc_epc_page(vepc, false); + epc_page = sgx_alloc_epc_page(vepc, SGX_NO_RECLAIM); if (IS_ERR(epc_page)) return PTR_ERR(epc_page);