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authorLinus Torvalds <torvalds@linux-foundation.org>2020-08-30 20:56:12 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-08-30 20:56:12 +0300
commit8bb5021cc2ee5d5dd129a9f2f5ad2bb76eea297d (patch)
treeb27e97c398add26ab8633b4ba6123657a922115f /Documentation
parent6f0306d1bfbc4d3e3fcfb949ee2c4af21071920a (diff)
parent4a133eb351ccc275683ad49305d0b04dde903733 (diff)
downloadlinux-8bb5021cc2ee5d5dd129a9f2f5ad2bb76eea297d.tar.xz
Merge tag 'powerpc-5.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman: - Revert our removal of PROT_SAO, at least one user expressed an interest in using it on Power9. Instead don't allow it to be used in guests unless enabled explicitly at compile time. - A fix for a crash introduced by a recent change to FP handling. - Revert a change to our idle code that left Power10 with no idle support. - One minor fix for the new scv system call path to set PPR. - Fix a crash in our "generic" PMU if branch stack events were enabled. - A fix for the IMC PMU, to correctly identify host kernel samples. - The ADB_PMU powermac code was found to be incompatible with VMAP_STACK, so make them incompatible in Kconfig until the code can be fixed. - A build fix in drivers/video/fbdev/controlfb.c, and a documentation fix. Thanks to Alexey Kardashevskiy, Athira Rajeev, Christophe Leroy, Giuseppe Sacco, Madhavan Srinivasan, Milton Miller, Nicholas Piggin, Pratik Rajesh Sampat, Randy Dunlap, Shawn Anastasio, Vaidyanathan Srinivasan. * tag 'powerpc-5.9-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: powerpc/32s: Disable VMAP stack which CONFIG_ADB_PMU Revert "powerpc/powernv/idle: Replace CPU feature check with PVR check" powerpc/perf: Fix reading of MSR[HV/PR] bits in trace-imc powerpc/perf: Fix crashes with generic_compat_pmu & BHRB powerpc/64s: Fix crash in load_fp_state() due to fpexc_mode powerpc/64s: scv entry should set PPR Documentation/powerpc: fix malformed table in syscall64-abi video: fbdev: controlfb: Fix build for COMPILE_TEST=y && PPC_PMAC=n selftests/powerpc: Update PROT_SAO test to skip ISA 3.1 powerpc/64s: Disallow PROT_SAO in LPARs by default Revert "powerpc/64s: Remove PROT_SAO support"
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/powerpc/syscall64-abi.rst4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/powerpc/syscall64-abi.rst b/Documentation/powerpc/syscall64-abi.rst
index 46caaadbb029..379817ca64d2 100644
--- a/Documentation/powerpc/syscall64-abi.rst
+++ b/Documentation/powerpc/syscall64-abi.rst
@@ -49,16 +49,18 @@ Register preservation rules
Register preservation rules match the ELF ABI calling sequence with the
following differences:
-=========== ============= ========================================
--- For the sc instruction, differences with the ELF ABI ---
+=========== ============= ========================================
r0 Volatile (System call number.)
r3 Volatile (Parameter 1, and return value.)
r4-r8 Volatile (Parameters 2-6.)
cr0 Volatile (cr0.SO is the return error condition.)
cr1, cr5-7 Nonvolatile
lr Nonvolatile
+=========== ============= ========================================
--- For the scv 0 instruction, differences with the ELF ABI ---
+=========== ============= ========================================
r0 Volatile (System call number.)
r3 Volatile (Parameter 1, and return value.)
r4-r8 Volatile (Parameters 2-6.)