From patchwork Thu Jan 21 17:01:22 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefano Stabellini X-Patchwork-Id: 571264 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org 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 39FE91402D9 for ; Fri, 22 Jan 2016 04:06:14 +1100 (AEDT) Received: from localhost ([::1]:48966 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aMIgV-0003bn-Vh for incoming@patchwork.ozlabs.org; Thu, 21 Jan 2016 12:06:12 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:47390) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aMIco-0004MY-3W for qemu-devel@nongnu.org; Thu, 21 Jan 2016 12:02:26 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aMIci-0001k2-H8 for qemu-devel@nongnu.org; Thu, 21 Jan 2016 12:02:22 -0500 Received: from smtp.citrix.com ([66.165.176.89]:47753) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aMIci-0001ij-8b for qemu-devel@nongnu.org; Thu, 21 Jan 2016 12:02:16 -0500 X-IronPort-AV: E=Sophos;i="5.22,326,1449532800"; d="scan'208";a="326849554" From: Stefano Stabellini To: Date: Thu, 21 Jan 2016 17:01:22 +0000 Message-ID: <1453395690-32660-3-git-send-email-stefano.stabellini@eu.citrix.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: MIME-Version: 1.0 X-DLP: MIA2 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 66.165.176.89 Cc: Markus Armbruster , xen-devel@lists.xensource.com, qemu-devel@nongnu.org, Stefano Stabellini Subject: [Qemu-devel] [PULL 03/11] xen-hvm: Clean up xen_hvm_init() error handling X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org From: Markus Armbruster xen_hvm_init() returns -1 without cleaning up on some errors (harmless long as the caller exit()s on error), dies with hw_error() on others. hw_error() isn't approprate here. Clean up to exit() on all errors. Signed-off-by: Markus Armbruster Reviewed-by: Stefano Stabellini Signed-off-by: Stefano Stabellini --- hw/i386/pc_piix.c | 5 ++--- hw/i386/pc_q35.c | 5 ++--- include/hw/xen/xen.h | 2 +- xen-hvm-stub.c | 3 +-- xen-hvm.c | 61 ++++++++++++++++++++++++++------------------------ 5 files changed, 38 insertions(+), 38 deletions(-) diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index df2b824..db0ae9c 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -121,9 +121,8 @@ static void pc_init1(MachineState *machine, pcms->below_4g_mem_size = machine->ram_size; } - if (xen_enabled() && xen_hvm_init(pcms, &ram_memory) != 0) { - fprintf(stderr, "xen hardware virtual machine initialisation failed\n"); - exit(1); + if (xen_enabled()) { + xen_hvm_init(pcms, &ram_memory); } pc_cpus_init(pcms); diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index 412b3cd..abbcbf9 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -111,9 +111,8 @@ static void pc_q35_init(MachineState *machine) pcms->below_4g_mem_size = machine->ram_size; } - if (xen_enabled() && xen_hvm_init(pcms, &ram_memory) != 0) { - fprintf(stderr, "xen hardware virtual machine initialisation failed\n"); - exit(1); + if (xen_enabled()) { + xen_hvm_init(pcms, &ram_memory); } pc_cpus_init(pcms); diff --git a/include/hw/xen/xen.h b/include/hw/xen/xen.h index e90931a..d07bc99 100644 --- a/include/hw/xen/xen.h +++ b/include/hw/xen/xen.h @@ -39,7 +39,7 @@ qemu_irq *xen_interrupt_controller_init(void); void xenstore_store_pv_console_info(int i, struct CharDriverState *chr); #if defined(NEED_CPU_H) && !defined(CONFIG_USER_ONLY) -int xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory); +void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory); void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, struct MemoryRegion *mr); void xen_modified_memory(ram_addr_t start, ram_addr_t length); diff --git a/xen-hvm-stub.c b/xen-hvm-stub.c index 6a39425..7ff0602 100644 --- a/xen-hvm-stub.c +++ b/xen-hvm-stub.c @@ -47,9 +47,8 @@ void xen_modified_memory(ram_addr_t start, ram_addr_t length) { } -int xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) +void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) { - return 0; } void qmp_xen_set_global_dirty_log(bool enable, Error **errp) diff --git a/xen-hvm.c b/xen-hvm.c index 2a93390..cb7128c 100644 --- a/xen-hvm.c +++ b/xen-hvm.c @@ -17,6 +17,7 @@ #include "qmp-commands.h" #include "sysemu/char.h" +#include "qemu/error-report.h" #include "qemu/range.h" #include "sysemu/xen-mapcache.h" #include "trace.h" @@ -1189,16 +1190,8 @@ static void xen_wakeup_notifier(Notifier *notifier, void *data) xc_set_hvm_param(xen_xc, xen_domid, HVM_PARAM_ACPI_S_STATE, 0); } -/* return 0 means OK, or -1 means critical issue -- will exit(1) */ -int xen_hvm_init(PCMachineState *pcms, - MemoryRegion **ram_memory) +void xen_hvm_init(PCMachineState *pcms, MemoryRegion **ram_memory) { - /* - * FIXME Returns -1 without cleaning up on some errors (harmless - * as long as the caller exit()s on error), dies with hw_error() - * on others. hw_error() isn't approprate here. Should probably - * simply exit() on all errors. - */ int i, rc; xen_pfn_t ioreq_pfn; xen_pfn_t bufioreq_pfn; @@ -1210,19 +1203,19 @@ int xen_hvm_init(PCMachineState *pcms, state->xce_handle = xen_xc_evtchn_open(NULL, 0); if (state->xce_handle == XC_HANDLER_INITIAL_VALUE) { perror("xen: event channel open"); - return -1; + goto err; } state->xenstore = xs_daemon_open(); if (state->xenstore == NULL) { perror("xen: xenstore open"); - return -1; + goto err; } rc = xen_create_ioreq_server(xen_xc, xen_domid, &state->ioservid); if (rc < 0) { perror("xen: ioreq server create"); - return -1; + goto err; } state->exit.notify = xen_exit_notifier; @@ -1238,8 +1231,9 @@ int xen_hvm_init(PCMachineState *pcms, &ioreq_pfn, &bufioreq_pfn, &bufioreq_evtchn); if (rc < 0) { - hw_error("failed to get ioreq server info: error %d handle=" XC_INTERFACE_FMT, - errno, xen_xc); + error_report("failed to get ioreq server info: error %d handle=" XC_INTERFACE_FMT, + errno, xen_xc); + goto err; } DPRINTF("shared page at pfn %lx\n", ioreq_pfn); @@ -1249,8 +1243,9 @@ int xen_hvm_init(PCMachineState *pcms, state->shared_page = xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE, PROT_READ|PROT_WRITE, ioreq_pfn); if (state->shared_page == NULL) { - hw_error("map shared IO page returned error %d handle=" XC_INTERFACE_FMT, - errno, xen_xc); + error_report("map shared IO page returned error %d handle=" XC_INTERFACE_FMT, + errno, xen_xc); + goto err; } rc = xen_get_vmport_regs_pfn(xen_xc, xen_domid, &ioreq_pfn); @@ -1260,11 +1255,14 @@ int xen_hvm_init(PCMachineState *pcms, xc_map_foreign_range(xen_xc, xen_domid, XC_PAGE_SIZE, PROT_READ|PROT_WRITE, ioreq_pfn); if (state->shared_vmport_page == NULL) { - hw_error("map shared vmport IO page returned error %d handle=" - XC_INTERFACE_FMT, errno, xen_xc); + error_report("map shared vmport IO page returned error %d handle=" + XC_INTERFACE_FMT, errno, xen_xc); + goto err; } } else if (rc != -ENOSYS) { - hw_error("get vmport regs pfn returned error %d, rc=%d", errno, rc); + error_report("get vmport regs pfn returned error %d, rc=%d", + errno, rc); + goto err; } state->buffered_io_page = xc_map_foreign_range(xen_xc, xen_domid, @@ -1272,7 +1270,8 @@ int xen_hvm_init(PCMachineState *pcms, PROT_READ|PROT_WRITE, bufioreq_pfn); if (state->buffered_io_page == NULL) { - hw_error("map buffered IO page returned error %d", errno); + error_report("map buffered IO page returned error %d", errno); + goto err; } /* Note: cpus is empty at this point in init */ @@ -1280,8 +1279,9 @@ int xen_hvm_init(PCMachineState *pcms, rc = xen_set_ioreq_server_state(xen_xc, xen_domid, state->ioservid, true); if (rc < 0) { - hw_error("failed to enable ioreq server info: error %d handle=" XC_INTERFACE_FMT, - errno, xen_xc); + error_report("failed to enable ioreq server info: error %d handle=" XC_INTERFACE_FMT, + errno, xen_xc); + goto err; } state->ioreq_local_port = g_malloc0(max_cpus * sizeof (evtchn_port_t)); @@ -1291,8 +1291,8 @@ int xen_hvm_init(PCMachineState *pcms, rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid, xen_vcpu_eport(state->shared_page, i)); if (rc == -1) { - fprintf(stderr, "shared evtchn %d bind error %d\n", i, errno); - return -1; + error_report("shared evtchn %d bind error %d", i, errno); + goto err; } state->ioreq_local_port[i] = rc; } @@ -1300,8 +1300,8 @@ int xen_hvm_init(PCMachineState *pcms, rc = xc_evtchn_bind_interdomain(state->xce_handle, xen_domid, bufioreq_evtchn); if (rc == -1) { - fprintf(stderr, "buffered evtchn bind error %d\n", errno); - return -1; + error_report("buffered evtchn bind error %d", errno); + goto err; } state->bufioreq_local_port = rc; @@ -1324,15 +1324,18 @@ int xen_hvm_init(PCMachineState *pcms, /* Initialize backend core & drivers */ if (xen_be_init() != 0) { - fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__); - return -1; + error_report("xen backend core setup failed"); + goto err; } xen_be_register("console", &xen_console_ops); xen_be_register("vkbd", &xen_kbdmouse_ops); xen_be_register("qdisk", &xen_blkdev_ops); xen_read_physmap(state); + return; - return 0; +err: + error_report("xen hardware virtual machine initialisation failed"); + exit(1); } void destroy_hvm_domain(bool reboot)