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Fix ppc64 boot with smt-enabled=off (rhbz 1173806)

This commit is contained in:
Josh Boyer 2014-12-15 14:39:28 -05:00
parent 32f1e15e15
commit 2b541ad477
2 changed files with 53 additions and 0 deletions
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7
kernel.spec
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@ -630,6 +630,9 @@ Patch26099: deal-with-deadlock-in-d_walk.patch
#CVE-2014-8133 rhbz 1172797 1174374
Patch26100: x86-tls-Validate-TLS-entries-to-protect-espfix.patch
#rhbz 1173806
Patch26101: powerpc-powernv-force-all-CPUs-to-be-bootable.patch
# git clone ssh://git.fedorahosted.org/git/kernel-arm64.git, git diff master...devel
Patch30000: kernel-arm64.patch
@ -1369,6 +1372,9 @@ ApplyPatch deal-with-deadlock-in-d_walk.patch
#CVE-2014-8133 rhbz 1172797 1174374
ApplyPatch x86-tls-Validate-TLS-entries-to-protect-espfix.patch
#rhbz 1173806
ApplyPatch powerpc-powernv-force-all-CPUs-to-be-bootable.patch
%if 0%{?aarch64patches}
ApplyPatch kernel-arm64.patch
%ifnarch aarch64 # this is stupid, but i want to notice before secondary koji does.
@ -2238,6 +2244,7 @@ fi
# || ||
%changelog
* Mon Dec 15 2014 Josh Boyer <jwboyer@fedoraproject.org>
- Fix ppc64 boot with smt-enabled=off (rhbz 1173806)
- CVE-2014-8133 x86: espfix(64) bypass via set_thread_area and CLONE_SETTLS (rhbz 1172797 1174374)
- CVE-2014-8559 deadlock due to incorrect usage of rename_lock (rhbz 1159313 1173814)

46
powerpc-powernv-force-all-CPUs-to-be-bootable.patch Normal file
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@ -0,0 +1,46 @@
From: Greg Kurz <gkurz@linux.vnet.ibm.com>
Date: Fri, 12 Dec 2014 12:37:40 +0100
Subject: [PATCH] powerpc/powernv: force all CPUs to be bootable
The subcore logic needs all the CPUs declared in the DT to be bootable,
otherwise the kernel hangs at boot time. Since subcore support starts
with POWER8, we can keep the current behaviour for older CPUs.
Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
---
arch/powerpc/platforms/powernv/smp.c | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index 4753958cd509..44ecd0925f56 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -185,13 +185,24 @@ static void pnv_smp_cpu_kill_self(void)
#endif /* CONFIG_HOTPLUG_CPU */
+static int pnv_cpu_bootable(unsigned int nr)
+{
+ /* Starting with POWER8, all CPUs need to be booted to avoid hangs
+ * during subcore init.
+ */
+ if (cpu_has_feature(CPU_FTR_ARCH_207S))
+ return 1;
+
+ return smp_generic_cpu_bootable(nr);
+}
+
static struct smp_ops_t pnv_smp_ops = {
.message_pass = smp_muxed_ipi_message_pass,
.cause_ipi = NULL, /* Filled at runtime by xics_smp_probe() */
.probe = xics_smp_probe,
.kick_cpu = pnv_smp_kick_cpu,
.setup_cpu = pnv_smp_setup_cpu,
- .cpu_bootable = smp_generic_cpu_bootable,
+ .cpu_bootable = pnv_cpu_bootable,
#ifdef CONFIG_HOTPLUG_CPU
.cpu_disable = pnv_smp_cpu_disable,
.cpu_die = generic_cpu_die,
--
2.1.0