Messages in this thread | | | Date | Tue, 16 Aug 2022 09:48:09 +0200 | Subject | Re: [PATCH] x86/entry: fix entry_INT80_compat for Xen PV guests | From | Jan Beulich <> |
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On 16.08.2022 09:11, Juergen Gross wrote: > Commit c89191ce67ef ("x86/entry: Convert SWAPGS to swapgs and remove > the definition of SWAPGS") missed one use case of SWAPGS in > entry_INT80_compat. Removing of the SWAPGS macro led to asm just > using "swapgs", as it is accepting instructions in capital letters, > too. > > This in turn leads to splats in Xen PV guests like: > > [ 36.145223] general protection fault, maybe for address 0x2d: 0000 [#1] PREEMPT SMP NOPTI > [ 36.145794] CPU: 2 PID: 1847 Comm: ld-linux.so.2 Not tainted 5.19.1-1-default #1 openSUSE Tumbleweed f3b44bfb672cdb9f235aff53b57724eba8b9411b > [ 36.146608] Hardware name: HP ProLiant ML350p Gen8, BIOS P72 11/14/2013 > [ 36.148126] RIP: e030:entry_INT80_compat+0x3/0xa3 > > Fix that by open coding this single instance of the SWAPGS macro. > > Cc: <stable@vger.kernel.org> # 5.19 > Fixes: c89191ce67ef ("x86/entry: Convert SWAPGS to swapgs and remove the definition of SWAPGS") > Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
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