lkml.org 
[lkml]   [2021]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
Subject[PATCH 5/5] KVM: x86/xen: Explicitly pad struct compat_vcpu_info to 64 bytes
From
Add a 2 byte pad to struct compat_vcpu_info so that the sum size of its
fields is actually 64 bytes. The effective size without the padding is
also 64 bytes due to the compiler aligning evtchn_pending_sel to a 4-byte
boundary, but depending on compiler alignment is subtle and unnecessary.

Opportunistically replace spaces with tables in the other fields.

Cc: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
arch/x86/kvm/xen.h | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/xen.h b/arch/x86/kvm/xen.h
index 4b32489c0cec..b66a921776f4 100644
--- a/arch/x86/kvm/xen.h
+++ b/arch/x86/kvm/xen.h
@@ -49,11 +49,12 @@ struct compat_arch_vcpu_info {
};

struct compat_vcpu_info {
- uint8_t evtchn_upcall_pending;
- uint8_t evtchn_upcall_mask;
- uint32_t evtchn_pending_sel;
- struct compat_arch_vcpu_info arch;
- struct pvclock_vcpu_time_info time;
+ uint8_t evtchn_upcall_pending;
+ uint8_t evtchn_upcall_mask;
+ uint16_t pad;
+ uint32_t evtchn_pending_sel;
+ struct compat_arch_vcpu_info arch;
+ struct pvclock_vcpu_time_info time;
}; /* 64 bytes (x86) */

struct compat_arch_shared_info {
--
2.30.0.478.g8a0d178c01-goog
\
 
 \ /
  Last update: 2021-02-10 19:44    [W:0.031 / U:0.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site