linux-kernel - linux-next: build failure after merge of the kvm tree

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Date:   Tue, 19 Apr 2022 15:34:23 +1000
From:   Stephen Rothwell <sfr@...b.auug.org.au>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     KVM <kvm@...r.kernel.org>, Peter Gonda <pgonda@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: linux-next: build failure after merge of the kvm tree

Hi all,

After merging the kvm tree, today's linux-next build (arm64 defconfig)
failed like this:

arch/arm64/kvm/psci.c: In function 'kvm_prepare_system_event':
arch/arm64/kvm/psci.c:184:32: error: 'struct <anonymous>' has no member named 'flags'
  184 |         vcpu->run->system_event.flags = flags;
      |                                ^

Caused by commit

  c24a950ec7d6 ("KVM, SEV: Add KVM_EXIT_SHUTDOWN metadata for SEV-ES")

In this commit, the uapi structure changes do not match the documentation
changes :-(  Does it matter that the ABI may be changed by this commit
(depending on the alignment of the structure members)?

I have added the following patch or today:

From: Stephen Rothwell <sfr@...b.auug.org.au>
Date: Tue, 19 Apr 2022 15:25:17 +1000
Subject: [PATCH] fix up for "KVM, SEV: Add KVM_EXIT_SHUTDOWN metadata for SEV-ES"

Signed-off-by: Stephen Rothwell <sfr@...b.auug.org.au>
---
 include/uapi/linux/kvm.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index dd1d8167e71f..68ce07185f03 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -448,6 +448,7 @@ struct kvm_run {
 #define KVM_SYSTEM_EVENT_NDATA_VALID    (1u << 31)
 			__u32 type;
 			__u32 ndata;
+			__u64 flags;
 			__u64 data[16];
 		} system_event;
 		/* KVM_EXIT_S390_STSI */
-- 
2.35.1

-- 
Cheers,
Stephen Rothwell

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