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From d07bebfe0f9a1e1cf3f25449d9c20d4c21c6e2a0 Mon Sep 17 00:00:00 2001
Message-Id: <d07bebfe0f9a1e1cf3f25449d9c20d4c21c6e2a0.1387298827.git.minovotn@redhat.com>
In-Reply-To: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
References: <3ed0fb61a3dc912ef036d7ef450bed192090709e.1387298827.git.minovotn@redhat.com>
From: "Michael S. Tsirkin" <mst@redhat.com>
Date: Tue, 17 Dec 2013 15:17:37 +0100
Subject: [PATCH 19/56] q35: make pci window address/size match guest cfg

RH-Author: Michael S. Tsirkin <mst@redhat.com>
Message-id: <1387293161-4085-20-git-send-email-mst@redhat.com>
Patchwork-id: 56325
O-Subject: [PATCH qemu-kvm RHEL7.0 v2 19/57] q35: make pci window address/size match guest cfg
Bugzilla: 1034876
RH-Acked-by: Igor Mammedov <imammedo@redhat.com>
RH-Acked-by: Marcel Apfelbaum <marcel.a@redhat.com>
RH-Acked-by: Laszlo Ersek <lersek@redhat.com>

For Q35, MMCFG address and size are guest configurable.
Update w32 property to make it behave accordingly.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 636228a887c4d5c0dc313bbf936de969b420a91a)

Conflicts:
	hw/pci-host/q35.c
---
 hw/pci-host/q35.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

Signed-off-by: Michal Novotny <minovotn@redhat.com>
---
 hw/pci-host/q35.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index be12eee..70ad01f 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -207,6 +207,16 @@ static void mch_update_pciexbar(MCHPCIState *mch)
     }
     addr = pciexbar & addr_mask;
     pcie_host_mmcfg_update(&s->host, enable, addr, length);
+    /* Leave enough space for the MCFG BAR */
+    /*
+     * TODO: this matches current bios behaviour, but it's not a power of two,
+     * which means an MTRR can't cover it exactly.
+     */
+    if (enable) {
+        mch->pci_info.w32.begin = addr + length;
+    } else {
+        mch->pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
+    }
 }
 
 /* PAM */
-- 
1.7.11.7