qemu-kvm/kvm-vfio-spapr-Move-hostwin_list-into-spapr-container.patch

From 3e9e7b57b15ac328f5d663b4e04df546d49f5fa6 Mon Sep 17 00:00:00 2001
From: Zhenzhong Duan <zhenzhong.duan@intel.com>
Date: Thu, 2 Nov 2023 15:12:45 +0800
Subject: [PATCH 020/101] vfio/spapr: Move hostwin_list into spapr container
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RH-Author: Eric Auger <eric.auger@redhat.com>
RH-MergeRequest: 211: IOMMUFD backend backport
RH-Jira: RHEL-19302 RHEL-21057
RH-Acked-by: Cédric Le Goater <clg@redhat.com>
RH-Acked-by: Sebastian Ott <sebott@redhat.com>
RH-Commit: [19/67] 87cfeaa32ad32a260a89b2bb1866d59e20c0fe30 (eauger1/centos-qemu-kvm)

No functional changes intended.

Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>
(cherry picked from commit dbb9d0c9691d145338686d3e0920da047f2ab3da)
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
 hw/vfio/spapr.c               | 36 +++++++++++++++++++----------------
 include/hw/vfio/vfio-common.h |  1 -
 2 files changed, 20 insertions(+), 17 deletions(-)

diff --git a/hw/vfio/spapr.c b/hw/vfio/spapr.c
index 68c3dd6c75..5c6426e697 100644
--- a/hw/vfio/spapr.c
+++ b/hw/vfio/spapr.c
@@ -27,6 +27,7 @@
 typedef struct VFIOSpaprContainer {
     VFIOContainer container;
     MemoryListener prereg_listener;
+    QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
 } VFIOSpaprContainer;
 
 static bool vfio_prereg_listener_skipped_section(MemoryRegionSection *section)
@@ -154,12 +155,12 @@ static const MemoryListener vfio_prereg_listener = {
     .region_del = vfio_prereg_listener_region_del,
 };
 
-static void vfio_host_win_add(VFIOContainer *container, hwaddr min_iova,
+static void vfio_host_win_add(VFIOSpaprContainer *scontainer, hwaddr min_iova,
                               hwaddr max_iova, uint64_t iova_pgsizes)
 {
     VFIOHostDMAWindow *hostwin;
 
-    QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+    QLIST_FOREACH(hostwin, &scontainer->hostwin_list, hostwin_next) {
         if (ranges_overlap(hostwin->min_iova,
                            hostwin->max_iova - hostwin->min_iova + 1,
                            min_iova,
@@ -173,15 +174,15 @@ static void vfio_host_win_add(VFIOContainer *container, hwaddr min_iova,
     hostwin->min_iova = min_iova;
     hostwin->max_iova = max_iova;
     hostwin->iova_pgsizes = iova_pgsizes;
-    QLIST_INSERT_HEAD(&container->hostwin_list, hostwin, hostwin_next);
+    QLIST_INSERT_HEAD(&scontainer->hostwin_list, hostwin, hostwin_next);
 }
 
-static int vfio_host_win_del(VFIOContainer *container,
+static int vfio_host_win_del(VFIOSpaprContainer *scontainer,
                              hwaddr min_iova, hwaddr max_iova)
 {
     VFIOHostDMAWindow *hostwin;
 
-    QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+    QLIST_FOREACH(hostwin, &scontainer->hostwin_list, hostwin_next) {
         if (hostwin->min_iova == min_iova && hostwin->max_iova == max_iova) {
             QLIST_REMOVE(hostwin, hostwin_next);
             g_free(hostwin);
@@ -192,7 +193,7 @@ static int vfio_host_win_del(VFIOContainer *container,
     return -1;
 }
 
-static VFIOHostDMAWindow *vfio_find_hostwin(VFIOContainer *container,
+static VFIOHostDMAWindow *vfio_find_hostwin(VFIOSpaprContainer *container,
                                             hwaddr iova, hwaddr end)
 {
     VFIOHostDMAWindow *hostwin;
@@ -329,6 +330,8 @@ vfio_spapr_container_add_section_window(VFIOContainerBase *bcontainer,
 {
     VFIOContainer *container = container_of(bcontainer, VFIOContainer,
                                             bcontainer);
+    VFIOSpaprContainer *scontainer = container_of(container, VFIOSpaprContainer,
+                                                  container);
     VFIOHostDMAWindow *hostwin;
     hwaddr pgsize = 0;
     int ret;
@@ -344,7 +347,7 @@ vfio_spapr_container_add_section_window(VFIOContainerBase *bcontainer,
         iova = section->offset_within_address_space;
         end = iova + int128_get64(section->size) - 1;
 
-        if (!vfio_find_hostwin(container, iova, end)) {
+        if (!vfio_find_hostwin(scontainer, iova, end)) {
             error_setg(errp, "Container %p can't map guest IOVA region"
                        " 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx, container,
                        iova, end);
@@ -358,7 +361,7 @@ vfio_spapr_container_add_section_window(VFIOContainerBase *bcontainer,
     }
 
     /* For now intersections are not allowed, we may relax this later */
-    QLIST_FOREACH(hostwin, &container->hostwin_list, hostwin_next) {
+    QLIST_FOREACH(hostwin, &scontainer->hostwin_list, hostwin_next) {
         if (ranges_overlap(hostwin->min_iova,
                            hostwin->max_iova - hostwin->min_iova + 1,
                            section->offset_within_address_space,
@@ -380,7 +383,7 @@ vfio_spapr_container_add_section_window(VFIOContainerBase *bcontainer,
         return ret;
     }
 
-    vfio_host_win_add(container, section->offset_within_address_space,
+    vfio_host_win_add(scontainer, section->offset_within_address_space,
                       section->offset_within_address_space +
                       int128_get64(section->size) - 1, pgsize);
 #ifdef CONFIG_KVM
@@ -419,6 +422,8 @@ vfio_spapr_container_del_section_window(VFIOContainerBase *bcontainer,
 {
     VFIOContainer *container = container_of(bcontainer, VFIOContainer,
                                             bcontainer);
+    VFIOSpaprContainer *scontainer = container_of(container, VFIOSpaprContainer,
+                                                  container);
 
     if (container->iommu_type != VFIO_SPAPR_TCE_v2_IOMMU) {
         return;
@@ -426,7 +431,7 @@ vfio_spapr_container_del_section_window(VFIOContainerBase *bcontainer,
 
     vfio_spapr_remove_window(container,
                              section->offset_within_address_space);
-    if (vfio_host_win_del(container,
+    if (vfio_host_win_del(scontainer,
                           section->offset_within_address_space,
                           section->offset_within_address_space +
                           int128_get64(section->size) - 1) < 0) {
@@ -454,7 +459,7 @@ int vfio_spapr_container_init(VFIOContainer *container, Error **errp)
     bool v2 = container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU;
     int ret, fd = container->fd;
 
-    QLIST_INIT(&container->hostwin_list);
+    QLIST_INIT(&scontainer->hostwin_list);
 
     /*
      * The host kernel code implementing VFIO_IOMMU_DISABLE is called
@@ -506,7 +511,7 @@ int vfio_spapr_container_init(VFIOContainer *container, Error **errp)
     } else {
         /* The default table uses 4K pages */
         bcontainer->pgsizes = 0x1000;
-        vfio_host_win_add(container, info.dma32_window_start,
+        vfio_host_win_add(scontainer, info.dma32_window_start,
                           info.dma32_window_start +
                           info.dma32_window_size - 1,
                           0x1000);
@@ -525,15 +530,14 @@ listener_unregister_exit:
 
 void vfio_spapr_container_deinit(VFIOContainer *container)
 {
+    VFIOSpaprContainer *scontainer = container_of(container, VFIOSpaprContainer,
+                                                  container);
     VFIOHostDMAWindow *hostwin, *next;
 
     if (container->iommu_type == VFIO_SPAPR_TCE_v2_IOMMU) {
-        VFIOSpaprContainer *scontainer = container_of(container,
-                                                      VFIOSpaprContainer,
-                                                      container);
         memory_listener_unregister(&scontainer->prereg_listener);
     }
-    QLIST_FOREACH_SAFE(hostwin, &container->hostwin_list, hostwin_next,
+    QLIST_FOREACH_SAFE(hostwin, &scontainer->hostwin_list, hostwin_next,
                        next) {
         QLIST_REMOVE(hostwin, hostwin_next);
         g_free(hostwin);
diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h
index ed6148c058..24ecc0e7ee 100644
--- a/include/hw/vfio/vfio-common.h
+++ b/include/hw/vfio/vfio-common.h
@@ -79,7 +79,6 @@ typedef struct VFIOContainer {
     VFIOContainerBase bcontainer;
     int fd; /* /dev/vfio/vfio, empowered by the attached groups */
     unsigned iommu_type;
-    QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
     QLIST_HEAD(, VFIOGroup) group_list;
 } VFIOContainer;
 
-- 
2.39.3