From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 79D858F40 for ; Sun, 16 Jul 2023 20:33:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F10C7C433C8; Sun, 16 Jul 2023 20:33:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1689539588; bh=CB6BsmXIdFZ8HNKNBv0Zv9kANptIDDpS437LKNLLTOg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=b1BSxfK9VVmJ3SShCup4UC//nYcK/bDW3okTkz1pheAIbXwTkORsJS3JChucCJOg7 2BJFreMyHvtx/44hUPk5dL2r5HwJdnZuE9pqQ4SviAmrOnMO9GXXb7d4qCBczlHK2T UOJig3z/XegVqRHNhO3WxFoPyG/w53hIroLNII7E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Juergen Gross , "Borislav Petkov (AMD)" , Sasha Levin Subject: [PATCH 6.1 061/591] x86/mm: Fix __swp_entry_to_pte() for Xen PV guests Date: Sun, 16 Jul 2023 21:43:20 +0200 Message-ID: <20230716194925.458842044@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230716194923.861634455@linuxfoundation.org> References: <20230716194923.861634455@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Juergen Gross [ Upstream commit 0f88130e8a6fd185b0aeb5d8e286083735f2585a ] Normally __swp_entry_to_pte() is never called with a value translating to a valid PTE. The only known exception is pte_swap_tests(), resulting in a WARN splat in Xen PV guests, as __pte_to_swp_entry() did translate the PFN of the valid PTE to a guest local PFN, while __swp_entry_to_pte() doesn't do the opposite translation. Fix that by using __pte() in __swp_entry_to_pte() instead of open coding the native variant of it. For correctness do the similar conversion for __swp_entry_to_pmd(). Fixes: 05289402d717 ("mm/debug_vm_pgtable: add tests validating arch helpers for core MM features") Signed-off-by: Juergen Gross Signed-off-by: Borislav Petkov (AMD) Link: https://lore.kernel.org/r/20230306123259.12461-1-jgross@suse.com Signed-off-by: Sasha Levin --- arch/x86/include/asm/pgtable_64.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index e479491da8d51..07cd53eeec770 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -237,8 +237,8 @@ static inline void native_pgd_clear(pgd_t *pgd) #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val((pte)) }) #define __pmd_to_swp_entry(pmd) ((swp_entry_t) { pmd_val((pmd)) }) -#define __swp_entry_to_pte(x) ((pte_t) { .pte = (x).val }) -#define __swp_entry_to_pmd(x) ((pmd_t) { .pmd = (x).val }) +#define __swp_entry_to_pte(x) (__pte((x).val)) +#define __swp_entry_to_pmd(x) (__pmd((x).val)) extern int kern_addr_valid(unsigned long addr); extern void cleanup_highmap(void); -- 2.39.2