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client-ip=162.221.158.21; receiver=esa5.hc3370-68.iphmx.com; envelope-from="anthony.perard@citrix.com"; x-sender="postmaster@mail.citrix.com"; x-conformance=sidf_compatible Authentication-Results: esa5.hc3370-68.iphmx.com; dkim=none (message not signed) header.i=none; spf=None smtp.pra=anthony.perard@citrix.com; spf=Pass smtp.mailfrom=anthony.perard@citrix.com; spf=None smtp.helo=postmaster@mail.citrix.com; dmarc=pass (p=none dis=none) d=citrix.com IronPort-SDR: v4HspzHLgAwb5U+o8xK7e97+x5w+49kXorekB1vj78YFEH9Wd9qlRxlXJJL+0asnvYjx2qPUM5 pibhlWrrGhEHVITsOSnh2VOm6PteQbcD606OPKE7rAViWuCoi87vxhQ1J6hDaBqz9QlTchTTu5 pTsdOzlboZwc/3C4gj2zhYZJcb1lkF/HYMEpl+Qv+dgsA7kX0tkA8g9r/jVdwvqeO+lR105Vr+ vE5jtb+NTwUSKQIvR1pRlcmo+oUwiYvbQEF4J0vQF4BCbkbNOijMsGsCj3ASwBurOY8Rzefa95 +1E= X-SBRS: 2.7 X-MesageID: 17496335 X-Ironport-Server: esa5.hc3370-68.iphmx.com X-Remote-IP: 162.221.158.21 X-Policy: $RELAYED X-IronPort-AV: E=Sophos;i="5.73,380,1583211600"; d="scan'208";a="17496335" Date: Mon, 11 May 2020 14:40:43 +0100 From: Anthony PERARD To: Roger Pau Monne Subject: Re: [PATCH] xen: fix build without pci passthrough Message-ID: <20200511134043.GH2116@perard.uk.xensource.com> References: <20200504101443.3165-1-roger.pau@citrix.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20200504101443.3165-1-roger.pau@citrix.com> Received-SPF: pass client-ip=216.71.155.168; envelope-from=anthony.perard@citrix.com; helo=esa5.hc3370-68.iphmx.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/11 09:40:48 X-ACL-Warn: Detected OS = FreeBSD 9.x or newer [fuzzy] X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, KHOP_DYNAMIC=0.001, RCVD_IN_DNSWL_MED=-2.3, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: xen-devel@lists.xenproject.org, Stefano Stabellini , qemu-devel@nongnu.org, Paul Durrant Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Mon, May 04, 2020 at 12:14:43PM +0200, Roger Pau Monne wrote: > has_igd_gfx_passthru is only available when QEMU is built with > CONFIG_XEN_PCI_PASSTHROUGH, and hence shouldn't be used in common > code without checking if it's available. > > Fixes: 46472d82322d0 ('xen: convert "-machine igd-passthru" to an accelerator property') > Signed-off-by: Roger Pau Monné > --- > Cc: Stefano Stabellini > Cc: Anthony Perard > Cc: Paul Durrant > Cc: xen-devel@lists.xenproject.org > --- > hw/xen/xen-common.c | 4 ++++ > hw/xen/xen_pt.h | 7 +++++++ > 2 files changed, 11 insertions(+) > > diff --git a/hw/xen/xen-common.c b/hw/xen/xen-common.c > index a15070f7f6..c800862419 100644 > --- a/hw/xen/xen-common.c > +++ b/hw/xen/xen-common.c > @@ -127,6 +127,7 @@ static void xen_change_state_handler(void *opaque, int running, > } > } > > +#ifdef CONFIG_XEN_PCI_PASSTHROUGH > static bool xen_get_igd_gfx_passthru(Object *obj, Error **errp) > { > return has_igd_gfx_passthru; > @@ -136,6 +137,7 @@ static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp) > { > has_igd_gfx_passthru = value; > } > +#endif > > static void xen_setup_post(MachineState *ms, AccelState *accel) > { > @@ -197,11 +199,13 @@ static void xen_accel_class_init(ObjectClass *oc, void *data) > > compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat)); > > +#ifdef CONFIG_XEN_PCI_PASSTHROUGH > object_class_property_add_bool(oc, "igd-passthru", > xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru, > &error_abort); > object_class_property_set_description(oc, "igd-passthru", > "Set on/off to enable/disable igd passthrou", &error_abort); > +#endif It might not be a good idea to have the presence of class property depending on what is built-in. Instead, I think it would be better to return an error when QEMU is built without xen_pt and a user is trying to enable it. That can be done by calling by calling error_setg(errp, "nop") in xen_set_igd_gfx_passthru(). > } > > #define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen") > diff --git a/hw/xen/xen_pt.h b/hw/xen/xen_pt.h > index 179775db7b..660dd8a008 100644 > --- a/hw/xen/xen_pt.h > +++ b/hw/xen/xen_pt.h > @@ -1,6 +1,7 @@ > #ifndef XEN_PT_H > #define XEN_PT_H > > +#include "qemu/osdep.h" Why do you need osdep? > #include "hw/xen/xen_common.h" > #include "hw/pci/pci.h" > #include "xen-host-pci-device.h" > @@ -322,7 +323,13 @@ extern void *pci_assign_dev_load_option_rom(PCIDevice *dev, > unsigned int domain, > unsigned int bus, unsigned int slot, > unsigned int function); > + > +#ifdef CONFIG_XEN_PCI_PASSTHROUGH > extern bool has_igd_gfx_passthru; > +#else > +# define has_igd_gfx_passthru false > +#endif I don't quite like the use of define here. Could you introduce a function that return a bool instead? And defining that function in hw/xen/xen.h like xen_enabled() would be fine I think. Thanks, -- Anthony PERARD