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Re: [QEMU][PATCH v4 01/10] hw/i386/xen/: move xen-mapcache.c to hw/xen/


  • To: Philippe Mathieu-Daudé <philmd@xxxxxxxxxx>, qemu-devel@xxxxxxxxxx, Thomas Huth <thuth@xxxxxxxxxx>
  • From: Vikram Garhwal <vikram.garhwal@xxxxxxx>
  • Date: Wed, 25 Jan 2023 18:39:48 -0800
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  • Delivery-date: Thu, 26 Jan 2023 02:40:11 +0000
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Hi Philippe,

On 1/25/23 2:59 PM, Philippe Mathieu-Daudé wrote:
On 25/1/23 09:53, Vikram Garhwal wrote:
xen-mapcache.c contains common functions which can be used for enabling Xen on aarch64 with IOREQ handling. Moving it out from hw/i386/xen to hw/xen to make it
accessible for both aarch64 and x86.

Signed-off-by: Vikram Garhwal <vikram.garhwal@xxxxxxx>
Signed-off-by: Stefano Stabellini <stefano.stabellini@xxxxxxx>
---
  hw/i386/meson.build              | 1 +
  hw/i386/xen/meson.build          | 1 -
  hw/i386/xen/trace-events         | 5 -----
  hw/xen/meson.build               | 4 ++++
  hw/xen/trace-events              | 5 +++++
  hw/{i386 => }/xen/xen-mapcache.c | 0
  6 files changed, 10 insertions(+), 6 deletions(-)
  rename hw/{i386 => }/xen/xen-mapcache.c (100%)

diff --git a/hw/i386/meson.build b/hw/i386/meson.build
index 213e2e82b3..cfdbfdcbcb 100644
--- a/hw/i386/meson.build
+++ b/hw/i386/meson.build
@@ -33,5 +33,6 @@ subdir('kvm')
  subdir('xen')
    i386_ss.add_all(xenpv_ss)
+i386_ss.add_all(xen_ss)
    hw_arch += {'i386': i386_ss}
diff --git a/hw/i386/xen/meson.build b/hw/i386/xen/meson.build
index be84130300..2fcc46e6ca 100644
--- a/hw/i386/xen/meson.build
+++ b/hw/i386/xen/meson.build
@@ -1,6 +1,5 @@
  i386_ss.add(when: 'CONFIG_XEN', if_true: files(
    'xen-hvm.c',
-  'xen-mapcache.c',
    'xen_apic.c',
    'xen_platform.c',
    'xen_pvdevice.c',
diff --git a/hw/i386/xen/trace-events b/hw/i386/xen/trace-events
index 5d6be61090..a0c89d91c4 100644
--- a/hw/i386/xen/trace-events
+++ b/hw/i386/xen/trace-events
@@ -21,8 +21,3 @@ xen_map_resource_ioreq(uint32_t id, void *addr) "id: %u addr: %p"   cpu_ioreq_config_read(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"   cpu_ioreq_config_write(void *req, uint32_t sbdf, uint32_t reg, uint32_t size, uint32_t data) "I/O=%p sbdf=0x%x reg=%u size=%u data=0x%x"
  -# xen-mapcache.c
-xen_map_cache(uint64_t phys_addr) "want 0x%"PRIx64
-xen_remap_bucket(uint64_t index) "index 0x%"PRIx64
-xen_map_cache_return(void* ptr) "%p"
-
diff --git a/hw/xen/meson.build b/hw/xen/meson.build
index ae0ace3046..19d0637c46 100644
--- a/hw/xen/meson.build
+++ b/hw/xen/meson.build
@@ -22,3 +22,7 @@ else
  endif
    specific_ss.add_all(when: ['CONFIG_XEN', xen], if_true: xen_specific_ss)
+
+xen_ss = ss.source_set()
+
+xen_ss.add(when: 'CONFIG_XEN', if_true: files('xen-mapcache.c'))

Can't we add it to softmmu_ss directly?

I tried adding this in softmmu_ss as per your comment in v2. But it fails with following error: //mnt/qemu_ioreq_upstream/include/sysemu/xen-mapcache.h:16:8: error: attempt to use poisoned "CONFIG_XEN"//
// #ifdef CONFIG_XEN//
//        ^//
//../hw/xen/xen-mapcache.c:106:6: error: redefinition of 'xen_map_cache_init'//
/

/ void xen_map_cache_init(phys_offset_to_gaddr_t f, void *opaque)/

I couldn't fix it in easy way.

diff --git a/hw/xen/trace-events b/hw/xen/trace-events
index 3da3fd8348..2c8f238f42 100644
--- a/hw/xen/trace-events
+++ b/hw/xen/trace-events
@@ -41,3 +41,8 @@ xs_node_vprintf(char *path, char *value) "%s %s"
  xs_node_vscanf(char *path, char *value) "%s %s"
  xs_node_watch(char *path) "%s"
  xs_node_unwatch(char *path) "%s"
+
+# xen-mapcache.c
+xen_map_cache(uint64_t phys_addr) "want 0x%"PRIx64
+xen_remap_bucket(uint64_t index) "index 0x%"PRIx64
+xen_map_cache_return(void* ptr) "%p"
diff --git a/hw/i386/xen/xen-mapcache.c b/hw/xen/xen-mapcache.c
similarity index 100%
rename from hw/i386/xen/xen-mapcache.c
rename to hw/xen/xen-mapcache.c




 


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