linux-kernel - [PATCH] x86/xen: fix booting 32-bit pv guest

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Message-Id: <20200409070001.16675-1-jgross@suse.com>
Date:   Thu,  9 Apr 2020 09:00:01 +0200
From:   Juergen Gross <jgross@...e.com>
To:     xen-devel@...ts.xenproject.org, x86@...nel.org,
        linux-kernel@...r.kernel.org
Cc:     Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: [PATCH] x86/xen: fix booting 32-bit pv guest

Commit 2f62f36e62daec ("x86/xen: Make the boot CPU idle task reliable")
introduced a regression for booting 32 bit Xen PV guests: the address
of the initial stack needs to be a virtual one.

Fixes: 2f62f36e62daec ("x86/xen: Make the boot CPU idle task reliable")
Signed-off-by: Juergen Gross <jgross@...e.com>
---
 arch/x86/xen/xen-head.S | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 7d1c4fcbe8f7..1ba601df3a37 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -38,7 +38,7 @@ SYM_CODE_START(startup_xen)
 #ifdef CONFIG_X86_64
 	mov initial_stack(%rip), %rsp
 #else
-	mov pa(initial_stack), %esp
+	mov initial_stack, %esp
 #endif
 
 #ifdef CONFIG_X86_64
-- 
2.16.4