Merge tag 'pull-loongarch-20251030' of https://github.com/bibo-mao/qemu into staging

loongarch queue

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# gpg: Signature made Thu 30 Oct 2025 03:38:05 AM CET
# gpg:                using EDDSA key 0D8642A3A2659F80B0B3D1A41F7B0C1251ACE7D1
# gpg: Good signature from "bibo mao <maobibo@loongson.cn>" [unknown]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 7044 3A00 19C0 E97A 31C7  13C4 8E86 8FB7 A176 9D4C
#      Subkey fingerprint: 0D86 42A3 A265 9F80 B0B3  D1A4 1F7B 0C12 51AC E7D1

* tag 'pull-loongarch-20251030' of https://github.com/bibo-mao/qemu:
  target/loongarch: Add PTW feature support in KVM mode
  linux-headers: Update to Linux v6.18-rc3

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>