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s390/pci: Convert inline assembly to EX_TABLE_INSN From: Niklas Schnelle To: Heiko Carstens , Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Matthew Rosato , Gerald Schaefer , Vineeth Vijayan , Peter Oberparleiter , Harald Freudenberger , Holger Dengler , Stefan Haberland , Jan Hoeppner , Ilya Leoshkevich , Janosch Frank , Claudio Imbrenda Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org In-Reply-To: <20261001103247.1989111-26-hca@linux.ibm.com> References: <20261001103247.1989111-1-hca@linux.ibm.com> <20261001103247.1989111-26-hca@linux.ibm.com> Autocrypt: addr=schnelle@linux.ibm.com; prefer-encrypt=mutual; keydata=mQINBGHm3M8BEAC+MIQkfoPIAKdjjk84OSQ8erd2OICj98+GdhMQpIjHXn/RJdCZLa58k /ay5x0xIHkWzx1JJOm4Lki7WEzRbYDexQEJP0xUia0U+4Yg7PJL4Dg/W4Ho28dRBROoJjgJSLSHwc 3/1pjpNlSaX/qg3ZM8+/EiSGc7uEPklLYu3gRGxcWV/944HdUyLcnjrZwCn2+gg9ncVJjsimS0ro/ 2wU2RPE4ju6NMBn5Go26sAj1owdYQQv9t0d71CmZS9Bh+2+cLjC7HvyTHKFxVGOznUL+j1a45VrVS 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classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2610020036 On Thu, 2026-10-01 at 12:32 +0200, Heiko Carstens wrote: > Convert all pci exception table entries to use EX_TABLE_INSN. > With EX_TABLE_INSN entries always point to the faulting instruction, > so duplicate entries are removed. >=20 > Signed-off-by: Heiko Carstens > --- > arch/s390/pci/pci_clp.c | 12 ++++++------ > arch/s390/pci/pci_insn.c | 36 ++++++++++++++++++------------------ > arch/s390/pci/pci_mmio.c | 28 +++++++++++++++------------- > 3 files changed, 39 insertions(+), 37 deletions(-) --- snip --- > diff --git a/arch/s390/pci/pci_mmio.c b/arch/s390/pci/pci_mmio.c > index f3f79ba78410..8b49175b0031 100644 > --- a/arch/s390/pci/pci_mmio.c > +++ b/arch/s390/pci/pci_mmio.c > @@ -39,10 +39,10 @@ static inline int __pcistb_mio_inuser( > asm_inline volatile ( > " sacf 256\n" > "0: .insn rsy,0xeb00000000d4,%[len],%[ioaddr],%[src]\n" > - "1: lhi %[exc],0\n" > - "2: sacf 768\n" > + " lhi %[exc],0\n" > + "1: sacf 768\n" > CC_IPM(cc) > - EX_TABLE(0b, 2b) EX_TABLE(1b, 2b) > + EX_TABLE_INSN(0b, 1b) > : CC_OUT(cc, cc), [len] "+d" (len), [exc] "+d" (exception) > : [ioaddr] "a" (ioaddr), [src] "Q" (*((u8 __force *)src)) > : CC_CLOBBER_LIST("memory")); > @@ -72,15 +72,16 @@ static inline int __pcistg_mio_inuser( > asm_inline volatile ( > " sacf 256\n" > "0: llgc %[tmp],0(%[src])\n" > - "4: sllg %[val],%[val],8\n" > + " sllg %[val],%[val],8\n" > " aghi %[src],1\n" > " ogr %[val],%[tmp]\n" > " brctg %[cnt],0b\n" > "1: .insn rre,0xb9d40000,%[val],%[ioaddr_len]\n" > - "2: lhi %[exc],0\n" > - "3: sacf 768\n" > + " lhi %[exc],0\n" > + "2: sacf 768\n" > CC_IPM(cc) > - EX_TABLE(0b, 3b) EX_TABLE(4b, 3b) EX_TABLE(1b, 3b) EX_TABLE(2b, 3b) > + EX_TABLE_INSN(0b, 2b) > + EX_TABLE_INSN(1b, 2b) :) this and the one in __pcilg_mio_inuser() must be one of the best examples why the new approach is cleaner and easier to read. Well done! > : [src] "+a" (src), [cnt] "+d" (cnt), > [val] "+d" (val), [tmp] "=3Dd" (tmp), [exc] "+d" (exception), > CC_OUT(cc, cc), [ioaddr_len] "+&d" (ioaddr_len.pair) > @@ -227,13 +228,13 @@ static inline int __pcilg_mio_inuser( > asm_inline volatile ( > " sacf 256\n" > "0: .insn rre,0xb9d60000,%[val],%[ioaddr_len]\n" > - "1: lhi %[exc],0\n" > + " lhi %[exc],0\n" > " jne 4f\n" > - "2: ahi %[shift],-8\n" > + "1: ahi %[shift],-8\n" > " srlg %[tmp],%[val],0(%[shift])\n" > - "3: stc %[tmp],0(%[dst])\n" > - "5: aghi %[dst],1\n" > - " brctg %[cnt],2b\n" > + "2: stc %[tmp],0(%[dst])\n" > + " aghi %[dst],1\n" > + " brctg %[cnt],1b\n" > /* > * Use xr to clear exc and set condition code to zero > * to ensure flag output is correct for this branch. > @@ -241,7 +242,8 @@ static inline int __pcilg_mio_inuser( > " xr %[exc],%[exc]\n" > "4: sacf 768\n" > CC_IPM(cc) > - EX_TABLE(0b, 4b) EX_TABLE(1b, 4b) EX_TABLE(3b, 4b) EX_TABLE(5b, 4b) > + EX_TABLE_INSN(0b, 4b) > + EX_TABLE_INSN(2b, 4b) > : [ioaddr_len] "+&d" (ioaddr_len.pair), [exc] "+d" (exception), > CC_OUT(cc, cc), [val] "=3Dd" (val), > [dst] "+a" (dst), [cnt] "+d" (cnt), [tmp] "=3Dd" (tmp), I went through the adjustments and they all look correct under the explanations you gave in the cover letter and prerequisite patches. So feel free to add my: Reviewed-by: Niklas Schnelle Thanks, Niklas