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From: Hongyan Xia To: xen-devel@lists.xenproject.org Date: Mon, 23 Mar 2020 09:41:38 +0000 Message-Id: <1acfafbd8ebada1538c9e06323ef0b3bf3f6897c.1584955616.git.hongyxia@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: Subject: [Xen-devel] [PATCH 1/5] x86/shim: map and unmap page tables in replace_va_mapping X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Wei Liu , Jan Beulich , =?UTF-8?q?Roger=20Pau=20Monn=C3=A9?= MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) From: Wei Liu Signed-off-by: Wei Liu Reviewed-by: Hongyan Xia --- xen/arch/x86/pv/shim.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/xen/arch/x86/pv/shim.c b/xen/arch/x86/pv/shim.c index ed2ece8a8a..1229d5ffb3 100644 --- a/xen/arch/x86/pv/shim.c +++ b/xen/arch/x86/pv/shim.c @@ -169,15 +169,19 @@ static void __init replace_va_mapping(struct domain *= d, l4_pgentry_t *l4start, unsigned long va, mfn_t mfn) { l4_pgentry_t *pl4e =3D l4start + l4_table_offset(va); - l3_pgentry_t *pl3e =3D l4e_to_l3e(*pl4e) + l3_table_offset(va); - l2_pgentry_t *pl2e =3D l3e_to_l2e(*pl3e) + l2_table_offset(va); - l1_pgentry_t *pl1e =3D l2e_to_l1e(*pl2e) + l1_table_offset(va); + l3_pgentry_t *pl3e =3D map_l3t_from_l4e(*pl4e) + l3_table_offset(va); + l2_pgentry_t *pl2e =3D map_l2t_from_l3e(*pl3e) + l2_table_offset(va); + l1_pgentry_t *pl1e =3D map_l1t_from_l2e(*pl2e) + l1_table_offset(va); struct page_info *page =3D mfn_to_page(l1e_get_mfn(*pl1e)); =20 put_page_and_type(page); =20 *pl1e =3D l1e_from_mfn(mfn, (!is_pv_32bit_domain(d) ? L1_PROT : COMPAT_L1_PROT)); + + UNMAP_DOMAIN_PAGE(pl1e); + UNMAP_DOMAIN_PAGE(pl2e); + UNMAP_DOMAIN_PAGE(pl3e); } =20 static void evtchn_reserve(struct domain *d, unsigned int port) --=20 2.24.1.AMZN _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel