From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59053) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1etv02-0005be-G5 for qemu-devel@nongnu.org; Thu, 08 Mar 2018 07:50:23 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1etuzy-0004H8-Gw for qemu-devel@nongnu.org; Thu, 08 Mar 2018 07:50:22 -0500 Received: from mail-cys01nam02on0064.outbound.protection.outlook.com ([104.47.37.64]:3232 helo=NAM02-CY1-obe.outbound.protection.outlook.com) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1etuzy-0004GP-9p for qemu-devel@nongnu.org; Thu, 08 Mar 2018 07:50:18 -0500 From: Brijesh Singh Date: Thu, 8 Mar 2018 06:48:53 -0600 Message-Id: <20180308124901.83533-21-brijesh.singh@amd.com> In-Reply-To: <20180308124901.83533-1-brijesh.singh@amd.com> References: <20180308124901.83533-1-brijesh.singh@amd.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH v12 20/28] hw/i386: set ram_debug_ops when memory encryption is enabled List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Alistair Francis , Christian Borntraeger , Cornelia Huck , "Daniel P . Berrange" , "Dr. David Alan Gilbert" , "Michael S. Tsirkin" , "Edgar E. Iglesias" , Eduardo Habkost , Eric Blake , kvm@vger.kernel.org, Marcel Apfelbaum , Markus Armbruster , Paolo Bonzini , Peter Crosthwaite , Peter Maydell , Richard Henderson , Stefan Hajnoczi , Thomas Lendacky , Borislav Petkov , Alexander Graf , Bruce Rogers , Brijesh Singh , Richard Henderson When memory encryption is enabled, the guest RAM and boot flash ROM will contain the encrypted data. By setting the debug ops allow us to invoke encryption APIs when accessing the memory for the debug purposes. Cc: Paolo Bonzini Cc: Richard Henderson Cc: Eduardo Habkost Cc: "Michael S. Tsirkin" Signed-off-by: Brijesh Singh --- hw/i386/pc.c | 9 +++++++++ hw/i386/pc_sysfw.c | 6 ++++++ 2 files changed, 15 insertions(+) diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 35fcb6efdfb9..69364b6856b5 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1360,6 +1360,15 @@ void pc_memory_init(PCMachineState *pcms, e820_add_entry(0x100000000ULL, pcms->above_4g_mem_size, E820_RAM); } + /* + * When memory encryption is enabled, the guest RAM will be encrypted with + * a guest unique key. Set the debug ops so that any debug access to the + * guest RAM will go through the memory encryption APIs. + */ + if (kvm_memcrypt_enabled()) { + kvm_memcrypt_set_debug_ops(ram); + } + if (!pcmc->has_reserved_memory && (machine->ram_slots || (machine->maxram_size > machine->ram_size))) { diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c index 73ac783f2055..845240f97293 100644 --- a/hw/i386/pc_sysfw.c +++ b/hw/i386/pc_sysfw.c @@ -181,6 +181,12 @@ static void pc_system_flash_init(MemoryRegion *rom_memory) error_report("failed to encrypt pflash rom"); exit(1); } + + /* + * The pflash ROM is encrypted, set the debug ops so that any + * debug accesses will use memory encryption APIs. + */ + kvm_memcrypt_set_debug_ops(flash_mem); } } } -- 2.14.3