linux-kernel - [tip: x86/urgent] x86/sev: Fix nonistr violation

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Date:   Tue, 12 Jan 2021 20:12:10 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Randy Dunlap <rdunlap@...radead.org>,
        "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/urgent] x86/sev: Fix nonistr violation

The following commit has been merged into the x86/urgent branch of tip:

Commit-ID:     a1d5c98aac33a5a0004ecf88905dcc261c52f988
Gitweb:        https://git.kernel.org/tip/a1d5c98aac33a5a0004ecf88905dcc261c52f988
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Wed, 06 Jan 2021 15:36:21 +01:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Tue, 12 Jan 2021 21:10:58 +01:00

x86/sev: Fix nonistr violation

When the compiler fails to inline, it violates nonisntr:

  vmlinux.o: warning: objtool: __sev_es_nmi_complete()+0xc7: call to sev_es_wr_ghcb_msr() leaves .noinstr.text section

Fixes: 4ca68e023b11 ("x86/sev-es: Handle NMI State")
Reported-by: Randy Dunlap <rdunlap@...radead.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lore.kernel.org/r/20210106144017.532902065@infradead.org

---
 arch/x86/kernel/sev-es.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/sev-es.c b/arch/x86/kernel/sev-es.c
index ab31c34..84c1821 100644
--- a/arch/x86/kernel/sev-es.c
+++ b/arch/x86/kernel/sev-es.c
@@ -225,7 +225,7 @@ static inline u64 sev_es_rd_ghcb_msr(void)
 	return __rdmsr(MSR_AMD64_SEV_ES_GHCB);
 }
 
-static inline void sev_es_wr_ghcb_msr(u64 val)
+static __always_inline void sev_es_wr_ghcb_msr(u64 val)
 {
 	u32 low, high;