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From: jarkko@kernel.org
To: linux-sgx@vger.kernel.org
Cc: dave.hansen@intel.com, kai.huang@intel.com,
	haitao.huang@intel.com, seanjc@google.com,
	"jarkko@kernel.org" <jarkko@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>
Subject: [PATCH v4 1/2] x86/sgx: Remove a warn from sgx_free_epc_page()
Date: Thu, 14 Jan 2021 01:35:40 +0200	[thread overview]
Message-ID: <20210113233541.17669-2-jarkko@kernel.org> (raw)
In-Reply-To: <20210113233541.17669-1-jarkko@kernel.org>

From: "jarkko@kernel.org" <jarkko@kernel.org>

Remove SGX_EPC_PAGE_RECLAIMER_TRACKED check and warning. This cannot
happen, as enclave pages are freed only at the time when encl->refcount
triggers, i.e. when both VFS and the page reclaimer have given up on
their references.

Signed-off-by: jarkko@kernel.org <jarkko@kernel.org>
---
 arch/x86/kernel/cpu/sgx/main.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/sgx/main.c b/arch/x86/kernel/cpu/sgx/main.c
index c519fc5f6948..ebbd3b97b3d0 100644
--- a/arch/x86/kernel/cpu/sgx/main.c
+++ b/arch/x86/kernel/cpu/sgx/main.c
@@ -605,8 +605,6 @@ void sgx_free_epc_page(struct sgx_epc_page *page)
 	struct sgx_epc_section *section = &sgx_epc_sections[page->section];
 	int ret;
 
-	WARN_ON_ONCE(page->flags & SGX_EPC_PAGE_RECLAIMER_TRACKED);
-
 	ret = __eremove(sgx_get_epc_virt_addr(page));
 	if (WARN_ONCE(ret, "EREMOVE returned %d (0x%x)", ret, ret))
 		return;
-- 
2.29.2


  reply	other threads:[~2021-01-14  1:57 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-13 23:35 [PATCH v4 0/2] Take away EREMOVE from sgx_free_epc_page() jarkko
2021-01-13 23:35 ` jarkko [this message]
2021-01-13 23:35 ` [PATCH v4 2/2] x86/sgx: Wipe out " jarkko

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