[Xen-devel] [PATCH for-2.10 1/2] hw/acpi: Call acpi_set_pci_info when no ACPI tables needed

[Anthony PERARD <anthony.perard@xxxxxxxxxx>]

To do PCI passthrough with Xen, the property acpi-pcihp-bsel needs to be
set, but this was done only when ACPI tables are built which is not
needed for a Xen guest. The need for the property starts with commit
"pc: pcihp: avoid adding ACPI_PCIHP_PROP_BSEL twice"
(f0c9d64a68b776374ec4732424a3e27753ce37b6).

Set pci info before checking for the needs to build ACPI tables.

Reported-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Tested-by: Sander Eikelenboom <linux@xxxxxxxxxxxxxx>
Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

---
In this patch rather than always calling acpi_set_pci_info() when
acpi_setup() is called, we could check first for acpi_enabled? (which is
true for Xen.)

This patch would be a canditade to backport to 2.9.

CC: Stefano Stabellini <sstabellini@xxxxxxxxxx>
CC: Bruce Rogers <brogers@xxxxxxxx>
---
 hw/i386/acpi-build.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c
index 98dd424678..e1b7797408 100644
--- a/hw/i386/acpi-build.c
+++ b/hw/i386/acpi-build.c
@@ -2871,6 +2871,8 @@ void acpi_setup(void)
     AcpiBuildState *build_state;
     Object *vmgenid_dev;
 
+    acpi_set_pci_info();
+
     if (!pcms->fw_cfg) {
         ACPI_BUILD_DPRINTF("No fw cfg. Bailing out.\n");
         return;
@@ -2888,8 +2890,6 @@ void acpi_setup(void)
 
     build_state = g_malloc0(sizeof *build_state);
 
-    acpi_set_pci_info();
-
     acpi_build_tables_init(&tables);
     acpi_build(&tables, MACHINE(pcms));
 
-- 
Anthony PERARD


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