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Thu, 26 Sep 2019 09:48:16 +0000 From: To: Date: Thu, 26 Sep 2019 10:46:09 +0100 Message-ID: <50b69940bfef5c9102d234f557b0e8bc228cc6a5.1569489002.git.hongyax@amazon.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: MIME-Version: 1.0 Precedence: Bulk Subject: [Xen-devel] [RFC PATCH 46/84] x86_64/mm: map and unmap page tables in setup_compat_m2p_table X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Andrew Cooper , Wei Liu , Wei Liu , Jan Beulich , =?utf-8?q?Roger_Pau_?= =?utf-8?q?Monn=C3=A9?= Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" From: Wei Liu Signed-off-by: Wei Liu --- xen/arch/x86/x86_64/mm.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/xen/arch/x86/x86_64/mm.c b/xen/arch/x86/x86_64/mm.c index 642fead4f6..0fac71356b 100644 --- a/xen/arch/x86/x86_64/mm.c +++ b/xen/arch/x86/x86_64/mm.c @@ -382,11 +382,13 @@ static int setup_compat_m2p_table(struct mem_hotadd_info *info) va = HIRO_COMPAT_MPT_VIRT_START + smap * sizeof(*compat_machine_to_phys_mapping); - l3_ro_mpt = l4e_to_l3e(idle_pg_table[l4_table_offset(va)]); + l3_ro_mpt = map_xen_pagetable_new( + l4e_get_mfn(idle_pg_table[l4_table_offset(va)])); ASSERT(l3e_get_flags(l3_ro_mpt[l3_table_offset(va)]) & _PAGE_PRESENT); - l2_ro_mpt = l3e_to_l2e(l3_ro_mpt[l3_table_offset(va)]); + l2_ro_mpt = map_xen_pagetable_new( + l3e_get_mfn(l3_ro_mpt[l3_table_offset(va)])); #define MFN(x) (((x) << L2_PAGETABLE_SHIFT) / sizeof(unsigned int)) #define CNT ((sizeof(*frame_table) & -sizeof(*frame_table)) / \ @@ -424,6 +426,9 @@ static int setup_compat_m2p_table(struct mem_hotadd_info *info) } #undef CNT #undef MFN + + UNMAP_XEN_PAGETABLE_NEW(l2_ro_mpt); + UNMAP_XEN_PAGETABLE_NEW(l3_ro_mpt); return err; }