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| author | Alex Bennée | 2019-02-15 10:56:38 +0100 |
|---|---|---|
| committer | Peter Maydell | 2019-02-15 10:56:38 +0100 |
| commit | 6c5c0fec29bbfe36c64eca1edfd8455be46b77c6 (patch) | |
| tree | c4a444a50fe3ae3bd222b422c3bf9245ee07860d /include/exec | |
| parent | target/arm: relax permission checks for HWCAP_CPUID registers (diff) | |
| download | qemu-6c5c0fec29bbfe36c64eca1edfd8455be46b77c6.tar.gz qemu-6c5c0fec29bbfe36c64eca1edfd8455be46b77c6.tar.xz qemu-6c5c0fec29bbfe36c64eca1edfd8455be46b77c6.zip | |
target/arm: expose CPUID registers to userspace
A number of CPUID registers are exposed to userspace by modern Linux
kernels thanks to the "ARM64 CPU Feature Registers" ABI. For QEMU's
user-mode emulation we don't need to emulate the kernels trap but just
return the value the trap would have done. To avoid too much #ifdef
hackery we process ARMCPRegInfo with a new helper (modify_arm_cp_regs)
before defining the registers. The modify routine is driven by a
simple data structure which describes which bits are exported and
which are fixed.
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20190205190224.2198-3-alex.bennee@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'include/exec')
0 files changed, 0 insertions, 0 deletions