From f0c9d64a68b776374ec4732424a3e27753ce37b6 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Wed, 3 Aug 2016 10:04:57 +0200 Subject: [PATCH] pc: pcihp: avoid adding ACPI_PCIHP_PROP_BSEL twice MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit PCI hotplug for bridges was introduced only since 2.0 however acpi_set_bsel()->object_property_add_uint32_ptr(bus, ACPI_PCIHP_PROP_BSEL) didn't take in account that for legacy mode (1.7) when PCI hotplug for bridges is unavailable and ACPI_PCIHP_PROP_BSEL property the only bus "PCI.0' has been created earlier at acpi_pcihp_init() time. We managed to live with it only because of error rised by adding a duplicate property in acpi_set_bsel() has been ignored which resulted in useless leaking of just allocated (int)bus_bsel. Issue affects only 1.7 machine type as ACPI tables supported by QEMU were introduced at that time, but there wasn't PCI hotplug for bridges till the next release (2.0). Fix it by removing duplicate ACPI_PCIHP_PROP_BSEL intialization in acpi_pcihp_init() and doing it only in one place acpi_set_pci_info(). PS: do not ignore error returned by object_property_add_uint32_ptr() and abort QEMU since it's programming error which should be fixed instead of being ignored. Signed-off-by: Igor Mammedov Reported-by: Marc-André Lureau Message-Id: <1470211497-116801-1-git-send-email-imammedo@redhat.com> Reviewed-by: Marcel Apfelbaum Reviewed-by: Marc-André Lureau [ Marc-André - Remove now unused ACPI_PCIHP_LEGACY_SIZE ] Signed-off-by: Marc-André Lureau --- hw/acpi/pcihp.c | 11 ----------- hw/i386/acpi-build.c | 4 ++-- 2 files changed, 2 insertions(+), 13 deletions(-) diff --git a/hw/acpi/pcihp.c b/hw/acpi/pcihp.c index d957d1e30d..2b0f3e1bfb 100644 --- a/hw/acpi/pcihp.c +++ b/hw/acpi/pcihp.c @@ -49,7 +49,6 @@ #define ACPI_PCIHP_ADDR 0xae00 #define ACPI_PCIHP_SIZE 0x0014 -#define ACPI_PCIHP_LEGACY_SIZE 0x000f #define PCI_UP_BASE 0x0000 #define PCI_DOWN_BASE 0x0004 #define PCI_EJ_BASE 0x0008 @@ -302,16 +301,6 @@ void acpi_pcihp_init(Object *owner, AcpiPciHpState *s, PCIBus *root_bus, s->root= root_bus; s->legacy_piix = !bridges_enabled; - if (s->legacy_piix) { - unsigned *bus_bsel = g_malloc(sizeof *bus_bsel); - - s->io_len = ACPI_PCIHP_LEGACY_SIZE; - - *bus_bsel = ACPI_PCIHP_BSEL_DEFAULT; - object_property_add_uint32_ptr(OBJECT(root_bus), ACPI_PCIHP_PROP_BSEL, - bus_bsel, NULL); - } - memory_region_init_io(&s->io, owner, &acpi_pcihp_io_ops, s, "acpi-pci-hotplug", s->io_len); memory_region_add_subregion(address_space_io, s->io_base, &s->io); diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 1c928abb28..f44767b9be 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -462,7 +462,7 @@ static void *acpi_set_bsel(PCIBus *bus, void *opaque) *bus_bsel = (*bsel_alloc)++; object_property_add_uint32_ptr(OBJECT(bus), ACPI_PCIHP_PROP_BSEL, - bus_bsel, NULL); + bus_bsel, &error_abort); } return bsel_alloc; @@ -471,7 +471,7 @@ static void *acpi_set_bsel(PCIBus *bus, void *opaque) static void acpi_set_pci_info(void) { PCIBus *bus = find_i440fx(); /* TODO: Q35 support */ - unsigned bsel_alloc = 0; + unsigned bsel_alloc = ACPI_PCIHP_BSEL_DEFAULT; if (bus) { /* Scan all PCI buses. Set property to enable acpi based hotplug. */