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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1726569174; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=9UUhaiQXzIvprq7xcvOrSmnVdqtyNaGsgzXjK0jOJ0E=; b=AbeT4852xeXvoz+LNWs7+SAegqLS5REcYnMesTBPCX0NR1FPsl+VHjaAnREns0WQL+2LHx T0mESdTNL2bg6FXPMIbuCqHqAmWKnZQsuaAdgDgGgicfKCzBviCVb/XwyhADSgbezANTdR T/yEh4qimlWAyfYjYF/TlcfiYrkGSDA= X-MC-Unique: PLdSC4ZgOx6rnMj1CHMMEg-1 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , =?UTF-8?q?Corvin=20K=C3=B6hne?= , =?UTF-8?q?Corvin=20K=C3=B6hne?= Subject: [PULL 8/8] vfio/igd: correctly calculate stolen memory size for gen 9 and later Date: Tue, 17 Sep 2024 12:32:29 +0200 Message-ID: <20240917103229.876515-9-clg@redhat.com> In-Reply-To: <20240917103229.876515-1-clg@redhat.com> References: <20240917103229.876515-1-clg@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1726569288411116600 From: Corvin K=C3=B6hne We have to update the calculation of the stolen memory size because we've seen devices using values of 0xf0 and above for the graphics mode select field. The new calculation was taken from the linux kernel [1]. [1] https://github.com/torvalds/linux/blob/7c626ce4bae1ac14f60076d00eafe71a= f30450ba/arch/x86/kernel/early-quirks.c#L455-L460 Signed-off-by: Corvin K=C3=B6hne Reviewed-by: Alex Williamson --- hw/vfio/igd.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c index 0751c43eae04aac5152c627af648319151ee1e39..a95d441f68661c23eee976be5d7= 4b2da354f9498 100644 --- a/hw/vfio/igd.c +++ b/hw/vfio/igd.c @@ -488,11 +488,18 @@ static int igd_get_stolen_mb(int gen, uint32_t gmch) gms =3D (gmch >> 8) & 0xff; } =20 - if (gms > 0x10) { - error_report("Unsupported IGD GMS value 0x%x", gms); - return 0; + if (gen < 9) { + if (gms > 0x10) { + error_report("Unsupported IGD GMS value 0x%x", gms); + return 0; + } + return gms * 32; + } else { + if (gms < 0xf0) + return gms * 32; + else + return gms * 4 + 4; } - return gms * 32; } =20 void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr) --=20 2.46.0