path: root/arch/x86/hyperv/hv_init.c
diff options
authorLinus Torvalds <torvalds@linux-foundation.org>2018-07-08 13:26:55 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-07-08 13:26:55 -0700
commit6f27a64092ae0993e3389081673a258a4c926186 (patch)
treebc8e070ca1238ec43d726d8fc3fca139d0635ce2 /arch/x86/hyperv/hv_init.c
parent6fb2489d7f09e1a9360d0afec65bcde1a6a472d4 (diff)
parent15279df6f26cf2013d713904b4a0c957ae8abb96 (diff)
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner: - Prevent an out-of-bounds access in mtrr_write() - Break a circular dependency in the new hyperv IPI acceleration code - Address the build breakage related to inline functions by enforcing gnu_inline and explicitly bringing native_save_fl() out of line, which also adds a set of _ARM_ARG macros which provide 32/64bit safety. - Initialize the shadow CR4 per cpu variable before using it. * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/mtrr: Don't copy out-of-bounds data in mtrr_write x86/hyper-v: Fix the circular dependency in IPI enlightenment x86/paravirt: Make native_save_fl() extern inline x86/asm: Add _ASM_ARG* constants for argument registers to <asm/asm.h> compiler-gcc.h: Add __attribute__((gnu_inline)) to all inline declarations x86/mm/32: Initialize the CR4 shadow before __flush_tlb_all()
Diffstat (limited to 'arch/x86/hyperv/hv_init.c')
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 4c431e1c1eff..1ff420217298 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -265,7 +265,7 @@ void __init hyperv_init(void)
u64 guest_id, required_msrs;
union hv_x64_msr_hypercall_contents hypercall_msr;
- int cpuhp;
+ int cpuhp, i;
if (x86_hyper_type != X86_HYPER_MS_HYPERV)
@@ -293,6 +293,9 @@ void __init hyperv_init(void)
if (!hv_vp_index)
+ for (i = 0; i < num_possible_cpus(); i++)
+ hv_vp_index[i] = VP_INVAL;
hv_vp_assist_page = kcalloc(num_possible_cpus(),
sizeof(*hv_vp_assist_page), GFP_KERNEL);
if (!hv_vp_assist_page) {