From patchwork Fri Aug 10 15:32:23 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= X-Patchwork-Id: 956302 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=pass (mailfrom) smtp.mailfrom=nongnu.org (client-ip=2001:4830:134:3::11; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=none dis=none) header.from=redhat.com Received: from lists.gnu.org (lists.gnu.org [IPv6:2001:4830:134:3::11]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 41n8QN2zDyz9ryt for ; Sat, 11 Aug 2018 01:37:48 +1000 (AEST) Received: from localhost ([::1]:56781 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fo9U2-0005CA-3o for incoming@patchwork.ozlabs.org; Fri, 10 Aug 2018 11:37:46 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:59235) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fo9PB-0008Lj-Pa for qemu-devel@nongnu.org; Fri, 10 Aug 2018 11:32:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fo9P6-0007DC-QH for qemu-devel@nongnu.org; Fri, 10 Aug 2018 11:32:45 -0400 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:57098 helo=mx1.redhat.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fo9P6-0007Cr-KE for qemu-devel@nongnu.org; Fri, 10 Aug 2018 11:32:40 -0400 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.rdu2.redhat.com [10.11.54.3]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 1E2CDF2B3C; Fri, 10 Aug 2018 15:32:40 +0000 (UTC) Received: from localhost (unknown [10.36.112.13]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9E78C10CD7ED; Fri, 10 Aug 2018 15:32:39 +0000 (UTC) From: =?utf-8?q?Marc-Andr=C3=A9_Lureau?= To: qemu-devel@nongnu.org Date: Fri, 10 Aug 2018 17:32:23 +0200 Message-Id: <20180810153223.28409-7-marcandre.lureau@redhat.com> In-Reply-To: <20180810153223.28409-1-marcandre.lureau@redhat.com> References: <20180810153223.28409-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.78 on 10.11.54.3 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 10 Aug 2018 15:32:40 +0000 (UTC) X-Greylist: inspected by milter-greylist-4.5.16 (mx1.redhat.com [10.11.55.2]); Fri, 10 Aug 2018 15:32:40 +0000 (UTC) for IP:'10.11.54.3' DOMAIN:'int-mx03.intmail.prod.int.rdu2.redhat.com' HELO:'smtp.corp.redhat.com' FROM:'marcandre.lureau@redhat.com' RCPT:'' X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 66.187.233.73 Subject: [Qemu-devel] [PATCH v9 6/6] tpm: add ACPI memory clear interface X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Eduardo Habkost , "Michael S. Tsirkin" , stefanb@linux.vnet.ibm.com, =?utf-8?q?Marc-Andr?= =?utf-8?b?w6kgTHVyZWF1?= , Igor Mammedov , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" This allows to pass the last failing test from the Windows HLK TPM 2.0 TCG PPI 1.3 tests. The interface is described in the "TCG Platform Reset Attack Mitigation Specification", chapter 6 "ACPI _DSM Function". According to Laszlo, it's not so easy to implement in OVMF, he suggested to do it in qemu instead. Signed-off-by: Marc-André Lureau --- hw/tpm/tpm_ppi.h | 2 ++ hw/i386/acpi-build.c | 46 ++++++++++++++++++++++++++++++++++++++++++++ hw/tpm/tpm_crb.c | 1 + hw/tpm/tpm_ppi.c | 23 ++++++++++++++++++++++ hw/tpm/tpm_tis.c | 1 + docs/specs/tpm.txt | 2 ++ hw/tpm/trace-events | 3 +++ 7 files changed, 78 insertions(+) diff --git a/hw/tpm/tpm_ppi.h b/hw/tpm/tpm_ppi.h index f6458bf87e..3239751e9f 100644 --- a/hw/tpm/tpm_ppi.h +++ b/hw/tpm/tpm_ppi.h @@ -23,4 +23,6 @@ typedef struct TPMPPI { bool tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m, hwaddr addr, Object *obj, Error **errp); +void tpm_ppi_reset(TPMPPI *tpmppi); + #endif /* TPM_TPM_PPI_H */ diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index c5e9a6e11d..271c7240dc 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -1824,6 +1824,13 @@ build_tpm_ppi(TPMIf *tpm, Aml *dev) pprq = aml_name("PPRQ"); pprm = aml_name("PPRM"); + aml_append(dev, + aml_operation_region("TPP3", AML_SYSTEM_MEMORY, + aml_int(TPM_PPI_ADDR_BASE + 0x200), + 0x1)); + field = aml_field("TPP3", AML_BYTE_ACC, AML_NOLOCK, AML_PRESERVE); + aml_append(field, aml_named_field("MOVV", 8)); + aml_append(dev, field); /* * DerefOf in Windows is broken with SYSTEM_MEMORY. Use a dynamic * operation region inside of a method for getting FUNC[op]. @@ -2166,7 +2173,46 @@ build_tpm_ppi(TPMIf *tpm, Aml *dev) aml_append(ifctx, aml_return(aml_buffer(1, zerobyte))); } aml_append(method, ifctx); + + ifctx = aml_if( + aml_equal(uuid, + aml_touuid("376054ED-CC13-4675-901C-4756D7F2D45D"))); + { + /* standard DSM query function */ + ifctx2 = aml_if(aml_equal(function, zero)); + { + uint8_t byte_list[1] = { 0x03 }; + aml_append(ifctx2, aml_return(aml_buffer(1, byte_list))); + } + aml_append(ifctx, ifctx2); + + /* + * TCG Platform Reset Attack Mitigation Specification 1.0 Ch.6 + * + * Arg 2 (Integer): Function Index = 1 + * Arg 3 (Package): Arguments = Package: Type: Integer + * Operation Value of the Request + * Returns: Type: Integer + * 0: Success + * 1: General Failure + */ + ifctx2 = aml_if(aml_equal(function, one)); + { + aml_append(ifctx2, + aml_store(aml_derefof(aml_index(arguments, zero)), + op)); + { + aml_append(ifctx2, aml_store(op, aml_name("MOVV"))); + + /* 0: success */ + aml_append(ifctx2, aml_return(zero)); + } + } + aml_append(ifctx, ifctx2); + } + aml_append(method, ifctx); } + aml_append(dev, method); } diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c index b243222fd6..48f6a716ad 100644 --- a/hw/tpm/tpm_crb.c +++ b/hw/tpm/tpm_crb.c @@ -233,6 +233,7 @@ static void tpm_crb_reset(void *dev) { CRBState *s = CRB(dev); + tpm_ppi_reset(&s->ppi); tpm_backend_reset(s->tpmbe); memset(s->regs, 0, sizeof(s->regs)); diff --git a/hw/tpm/tpm_ppi.c b/hw/tpm/tpm_ppi.c index 8b46b9dd4b..dbfe342ca2 100644 --- a/hw/tpm/tpm_ppi.c +++ b/hw/tpm/tpm_ppi.c @@ -16,8 +16,30 @@ #include "qapi/error.h" #include "cpu.h" #include "sysemu/memory_mapping.h" +#include "sysemu/reset.h" #include "migration/vmstate.h" #include "tpm_ppi.h" +#include "trace.h" + +void tpm_ppi_reset(TPMPPI *tpmppi) +{ + char *ptr = memory_region_get_ram_ptr(&tpmppi->ram); + + if (ptr[0x200] & 0x1) { + GuestPhysBlockList guest_phys_blocks; + GuestPhysBlock *block; + + guest_phys_blocks_init(&guest_phys_blocks); + guest_phys_blocks_append(&guest_phys_blocks); + QTAILQ_FOREACH(block, &guest_phys_blocks.head, next) { + trace_tpm_ppi_memset(block->host_addr, + block->target_end - block->target_start); + memset(block->host_addr, 0, + block->target_end - block->target_start); + } + guest_phys_blocks_free(&guest_phys_blocks); + } +} bool tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m, hwaddr addr, Object *obj, Error **errp) @@ -27,5 +49,6 @@ bool tpm_ppi_init(TPMPPI *tpmppi, struct MemoryRegion *m, vmstate_register_ram(&tpmppi->ram, DEVICE(obj)); memory_region_add_subregion(m, addr, &tpmppi->ram); + return true; } diff --git a/hw/tpm/tpm_tis.c b/hw/tpm/tpm_tis.c index 70432ffe8b..d9bfa956cc 100644 --- a/hw/tpm/tpm_tis.c +++ b/hw/tpm/tpm_tis.c @@ -868,6 +868,7 @@ static void tpm_tis_reset(DeviceState *dev) s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->be_driver), TPM_TIS_BUFFER_MAX); + tpm_ppi_reset(&s->ppi); tpm_backend_reset(s->be_driver); s->active_locty = TPM_TIS_NO_LOCALITY; diff --git a/docs/specs/tpm.txt b/docs/specs/tpm.txt index f3b7615161..54a3e1e4c5 100644 --- a/docs/specs/tpm.txt +++ b/docs/specs/tpm.txt @@ -121,6 +121,8 @@ layout: +----------+--------+--------+-------------------------------------------+ | next_step| 0x1 | 0x159 | Operation to execute after reboot by | | | | | firmware. Used by firmware. | + +----------+--------+--------+-------------------------------------------+ + | movv | 0x1 | 0x200 | Memory overwrite variable | +----------+--------+--------+-------------------------------------------+ The following values are supported for the 'func' field. They correspond diff --git a/hw/tpm/trace-events b/hw/tpm/trace-events index 25bee0cecf..920d32ad55 100644 --- a/hw/tpm/trace-events +++ b/hw/tpm/trace-events @@ -51,3 +51,6 @@ tpm_tis_mmio_write_init_abort(void) "Initiating abort" tpm_tis_mmio_write_lowering_irq(void) "Lowering IRQ" tpm_tis_mmio_write_data2send(uint32_t value, unsigned size) "Data to send to TPM: 0x%08x (size=%d)" tpm_tis_pre_save(uint8_t locty, uint32_t rw_offset) "locty: %d, rw_offset = %u" + +# hw/tpm/tpm_ppi.c +tpm_ppi_memset(uint8_t *ptr, size_t size) "memset: %p %zu"