Adds the GPC bypass windows defined in D9.2 of the Arm ARM. D9.8 (the APAS instruction) is not implemented yet.
A large part of this is testing. To test GPC effectively, we need to check that memory accesses are causing exceptions, or not causing exceptions as appropriate. For some tests, boot.S is altered to record certain exceptions and continue executing the test. An alternative would be to use gdbstub to break on locations inside the vector table and continue, but this requires significant coordination between the C test binary and Python test driver, so has been avoided for now. Signed-off-by: Jim MacArthur <[email protected]> --- Jim MacArthur (5): target/arm/cpu-features.h: x-rme now means GPC3 target/arm: Setup new registers for GPC3 target/arm/ptw.c: Add Granule Bypass Windows tests/tcg/aarch64/system: Alternative boot object for exception logging tests/tcg/aarch64/system/gpc-test.c: Basic test for granule protection check target/arm/cpu-features.h | 5 + target/arm/cpu.h | 7 ++ target/arm/helper.c | 19 ++++ target/arm/ptw.c | 50 ++++++++++ target/arm/tcg/cpu64.c | 4 +- tests/tcg/aarch64/Makefile.softmmu-target | 22 +++- tests/tcg/aarch64/system/boot.S | 62 ++++++++++++ tests/tcg/aarch64/system/boot.h | 14 +++ tests/tcg/aarch64/system/gpc-test.c | 160 ++++++++++++++++++++++++++++++ 9 files changed, 336 insertions(+), 7 deletions(-) --- base-commit: 2db91528542672cf0db78b3f2cc0e22b36302b38 change-id: 20260528-jmac-gpc3b-187f9d7cf0dd Best regards, -- Jim MacArthur <[email protected]>
