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From: Jim Mattson <jmattson@google.com>
To: kvm@vger.kernel.org, pbonzini@redhat.com, aaronlewis@google.com
Cc: Jim Mattson <jmattson@google.com>
Subject: [kvm-unit-tests PATCH] x86: VMX: Require 16-byte alignment for struct vmx_msr_entry
Date: Thu, 14 Apr 2022 11:58:53 -0700	[thread overview]
Message-ID: <20220414185853.342787-1-jmattson@google.com> (raw)

The MSR-store area and the MSR-load areas must be 16-byte aligned, per
the hardware specification.

Fixes: bd1bf2d6af77a ("VMX: Test MSR load/store feature")
Signed-off-by: Jim Mattson <jmattson@google.com>
---
 x86/vmx_tests.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/x86/vmx_tests.c b/x86/vmx_tests.c
index df931985ec46..4d98b7cb08dd 100644
--- a/x86/vmx_tests.c
+++ b/x86/vmx_tests.c
@@ -1959,7 +1959,7 @@ struct vmx_msr_entry {
 	u32 index;
 	u32 reserved;
 	u64 value;
-} __attribute__((packed));
+} __attribute__((packed, aligned(16)));
 
 #define MSR_MAGIC 0x31415926
 struct vmx_msr_entry *exit_msr_store, *entry_msr_load, *exit_msr_load;
-- 
2.36.0.rc0.470.gd361397f0d-goog


             reply	other threads:[~2022-04-14 18:59 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-04-14 18:58 Jim Mattson [this message]
2022-04-14 19:55 ` [kvm-unit-tests PATCH] x86: VMX: Require 16-byte alignment for struct vmx_msr_entry Aaron Lewis

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