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authorClaudio Carvalho <cclaudio@linux.ibm.com>2019-08-22 00:48:34 -0300
committerMichael Ellerman <mpe@ellerman.id.au>2019-08-30 09:40:15 +1000
commitbb04ffe85eebebd64d5e673a9434d968e80f3aa1 (patch)
treef0375d18e4466a0af554ed7a62db72b7cd3c2226 /arch/powerpc/include/asm/firmware.h
parenta49dddbdb0cca1d00fc9251e543a0aac09a6a65b (diff)
downloadlinux-bb04ffe85eebebd64d5e673a9434d968e80f3aa1.tar.bz2
powerpc/powernv: Introduce FW_FEATURE_ULTRAVISOR
In PEF enabled systems, some of the resources which were previously hypervisor privileged are now ultravisor privileged and controlled by the ultravisor firmware. This adds FW_FEATURE_ULTRAVISOR to indicate if PEF is enabled. The host kernel can use FW_FEATURE_ULTRAVISOR, for instance, to skip accessing resources (e.g. PTCR and LDBAR) in case PEF is enabled. Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com> [ andmike: Device node name to "ibm,ultravisor" ] Signed-off-by: Michael Anderson <andmike@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20190822034838.27876-4-cclaudio@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/firmware.h')
-rw-r--r--arch/powerpc/include/asm/firmware.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/firmware.h b/arch/powerpc/include/asm/firmware.h
index faeca8b76c8c..b3e214a97f3a 100644
--- a/arch/powerpc/include/asm/firmware.h
+++ b/arch/powerpc/include/asm/firmware.h
@@ -50,6 +50,7 @@
#define FW_FEATURE_DRC_INFO ASM_CONST(0x0000000800000000)
#define FW_FEATURE_BLOCK_REMOVE ASM_CONST(0x0000001000000000)
#define FW_FEATURE_PAPR_SCM ASM_CONST(0x0000002000000000)
+#define FW_FEATURE_ULTRAVISOR ASM_CONST(0x0000004000000000)
#ifndef __ASSEMBLY__
@@ -68,9 +69,9 @@ enum {
FW_FEATURE_TYPE1_AFFINITY | FW_FEATURE_PRRN |
FW_FEATURE_HPT_RESIZE | FW_FEATURE_DRMEM_V2 |
FW_FEATURE_DRC_INFO | FW_FEATURE_BLOCK_REMOVE |
- FW_FEATURE_PAPR_SCM,
+ FW_FEATURE_PAPR_SCM | FW_FEATURE_ULTRAVISOR,
FW_FEATURE_PSERIES_ALWAYS = 0,
- FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL,
+ FW_FEATURE_POWERNV_POSSIBLE = FW_FEATURE_OPAL | FW_FEATURE_ULTRAVISOR,
FW_FEATURE_POWERNV_ALWAYS = 0,
FW_FEATURE_PS3_POSSIBLE = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,
FW_FEATURE_PS3_ALWAYS = FW_FEATURE_LPAR | FW_FEATURE_PS3_LV1,