[v1] Add support for PowerPC e500 little-endian pages

[PATCH 0/3] Add support for PowerPC e500 little-endian pages

Danila Zhebryakov posted 3 patches 2 months, 3 weeks ago

Diff against v2 v3 v4
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git fetch https://github.com/patchew-project/qemu tags/patchew/20250821113348.91339-1-d.zhebryakov@yandex.ru

Maintainers: Richard Henderson <richard.henderson@linaro.org>, Paolo Bonzini <pbonzini@redhat.com>, Riku Voipio <riku.voipio@iki.fi>, Laurent Vivier <laurent@vivier.eu>, Nicholas Piggin <npiggin@gmail.com>, Chinmay Rath <rathc@linux.ibm.com>, David Hildenbrand <david@redhat.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>

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accel/tcg/atomic_common.c.inc       |  27 +--
accel/tcg/atomic_template.h         | 246 +++++++++-------------------
accel/tcg/cputlb.c                  |  22 ++-
accel/tcg/tcg-runtime.h             |  36 +---
accel/tcg/user-exec.c               |   2 +-
include/accel/tcg/cpu-ldst-common.h |  39 ++---
target/m68k/op_helper.c             |   4 +-
target/ppc/cpu.h                    |   4 +
target/ppc/gdbstub.c                |  17 +-
target/ppc/mmu-booke.c              |   5 +
target/ppc/mmu_helper.c             |  17 +-
target/ppc/translate.c              |  29 +++-
target/s390x/tcg/mem_helper.c       |   6 +-
tcg/tcg-op-ldst.c                   |  31 ++--
14 files changed, 204 insertions(+), 281 deletions(-)

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[PATCH 0/3] Add support for PowerPC e500 little-endian pages

Posted by Danila Zhebryakov 2 months, 3 weeks ago

These changes make powerpc booke206 mmu pass TLB_BSWAP flag for pages marked as LE, and also fixes all the issues this causes.
 - added TLB_BSWAP to non-MMIO flags
 - inserted additional check for LE page when bswap-ing instructions
 - removed assert for cross-page TLB_BSWAP accesses
 - added gdbstub fix to account for TLB_BSWAP of the currently running code

BE- and LE- atomic operations (used by load-and-reserve and store-conditional instructions) were unified to support TLB_BSWAP

Some of the fixes are based on what is done in https://github.com/YetAnotherMod/qemu

Danila Zhebryakov (3):
  accel/tcg: Unify big- and little- endian atomic ops
  target/ppc: Add support for LE pages on PowerPC booke206 mmu
  target/ppc: fix GDB stub to work correctly with LE pages

 accel/tcg/atomic_common.c.inc       |  27 +--
 accel/tcg/atomic_template.h         | 246 +++++++++-------------------
 accel/tcg/cputlb.c                  |  22 ++-
 accel/tcg/tcg-runtime.h             |  36 +---
 accel/tcg/user-exec.c               |   2 +-
 include/accel/tcg/cpu-ldst-common.h |  39 ++---
 target/m68k/op_helper.c             |   4 +-
 target/ppc/cpu.h                    |   4 +
 target/ppc/gdbstub.c                |  17 +-
 target/ppc/mmu-booke.c              |   5 +
 target/ppc/mmu_helper.c             |  17 +-
 target/ppc/translate.c              |  29 +++-
 target/s390x/tcg/mem_helper.c       |   6 +-
 tcg/tcg-op-ldst.c                   |  31 ++--
 14 files changed, 204 insertions(+), 281 deletions(-)

-- 
2.47.2