mbox series

[v3,0/5] support reading some CPUID/CNT registers from user-space

Message ID 20180625160009.17437-1-alex.bennee@linaro.org
Headers show
Series support reading some CPUID/CNT registers from user-space | expand

Message

Alex Bennée June 25, 2018, 4 p.m. UTC 
Hi,

This expands on the previous version by adding the additional CPUID
registers as exposed by the HWCAP_CPUID kernel feature. Most of the
work involves judicious use of macros. There is a easily extensible
test case that uses the shiny new check-tcg infrastructure ;-)

Alex Bennée (5):
  target/arm: support reading of CNT[VCT|FRQ]_EL0 from user-space
  target/arm: relax permission checks for HWCAP_CPUID registers
  target/arm: expose CPUID registers to userspace
  linux-user/elfload: enable HWCAP_CPUID for AArch64
  tests/tcg/aarch64: userspace system register test

 linux-user/elfload.c              |  1 +
 target/arm/cpu.h                  |  7 +++
 target/arm/helper.c               | 80 +++++++++++++++++++------
 tests/tcg/aarch64/Makefile.target |  2 +-
 tests/tcg/aarch64/sysregs.c       | 99 +++++++++++++++++++++++++++++++
 5 files changed, 170 insertions(+), 19 deletions(-)
 create mode 100644 tests/tcg/aarch64/sysregs.c

-- 
2.17.1

Comments

Peter Maydell June 28, 2018, 3:06 p.m. UTC | #1 
On 25 June 2018 at 17:00, Alex Bennée <alex.bennee@linaro.org> wrote:
> Hi,

>

> This expands on the previous version by adding the additional CPUID

> registers as exposed by the HWCAP_CPUID kernel feature. Most of the

> work involves judicious use of macros. There is a easily extensible

> test case that uses the shiny new check-tcg infrastructure ;-)

>

> Alex Bennée (5):

>   target/arm: support reading of CNT[VCT|FRQ]_EL0 from user-space

>   target/arm: relax permission checks for HWCAP_CPUID registers

>   target/arm: expose CPUID registers to userspace

>   linux-user/elfload: enable HWCAP_CPUID for AArch64

>   tests/tcg/aarch64: userspace system register test


Patch 1 is a bugfix not very related to the rest, so I've applied
it to target-arm.next, and left review comments on 2/3.

thanks
-- PMM