diff options
Diffstat (limited to 'meta/recipes-devtools/qemu/qemu/apic-fixup-fallthrough-to-PIC.patch')
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu/apic-fixup-fallthrough-to-PIC.patch | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/qemu/apic-fixup-fallthrough-to-PIC.patch b/meta/recipes-devtools/qemu/qemu/apic-fixup-fallthrough-to-PIC.patch new file mode 100644 index 0000000000..9bbbc6f76d --- /dev/null +++ b/meta/recipes-devtools/qemu/qemu/apic-fixup-fallthrough-to-PIC.patch @@ -0,0 +1,46 @@ +From bef93bb81588b5323a52d2e1886f2a77b64a976b Mon Sep 17 00:00:00 2001 +From: Mark Asselstine <mark.asselstine@windriver.com> +Date: Tue, 26 Feb 2013 11:43:28 -0500 +Subject: [PATCH 03/18] apic: fixup fallthrough to PIC + +Commit 0e21e12bb311c4c1095d0269dc2ef81196ccb60a [Don't route PIC +interrupts through the local APIC if the local APIC config says so.] +missed a check to ensure the local APIC is enabled. Since if the local +APIC is disabled it doesn't matter what the local APIC config says. + +If this check isn't done and the guest has disabled the local APIC the +guest will receive a general protection fault, similar to what is seen +here: + +https://lists.gnu.org/archive/html/qemu-devel/2012-12/msg02304.html + +The GPF is caused by an attempt to service interrupt 0xffffffff. This +comes about since cpu_get_pic_interrupt() calls apic_accept_pic_intr() +(with the local APIC disabled apic_get_interrupt() returns -1). +apic_accept_pic_intr() returns 0 and thus the interrupt number which +is returned from cpu_get_pic_interrupt(), and which is attempted to be +serviced, is -1. + +Signed-off-by: Mark Asselstine <mark.asselstine@windriver.com> +Upstream-Status: Submitted [https://lists.gnu.org/archive/html/qemu-devel/2013-04/msg00878.html] +Signed-off-by: He Zhe <zhe.he@windriver.com> +--- + hw/intc/apic.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/hw/intc/apic.c b/hw/intc/apic.c +index 45887d99..c5ae4087 100644 +--- a/hw/intc/apic.c ++++ b/hw/intc/apic.c +@@ -587,7 +587,7 @@ int apic_accept_pic_intr(DeviceState *dev) + APICCommonState *s = APIC_COMMON(dev); + uint32_t lvt0; + +- if (!s) ++ if (!s || !(s->spurious_vec & APIC_SV_ENABLE)) + return -1; + + lvt0 = s->lvt[APIC_LVT_LINT0]; +-- +2.11.0 + |