[PULL 7/7] i386: Add PKU on Skylake-Server CPU model

Eduardo Habkost
2018-10-31T00:45:50Z

From: Tao Xu <tao3.xu@intel.com>

As the release document ref below link (page 13):
https://software.intel.com/sites/default/files/managed/c5/15/\
architecture-instruction-set-extensions-programming-reference.pdf

PKU is supported in Skylake Server (Only Server) and later, and
on Intel(R) Xeon(R) Processor Scalable Family. So PKU is supposed
to be in Skylake-Server CPU model. And PKU's CPUID has been
exposed to QEMU. But PKU can't be find in Skylake-Server CPU
model in the code. So this patch will fix this issue in
Skylake-Server CPU model.

Signed-off-by: Tao Xu <tao3.xu@intel.com>
Message-Id: <5014b57f834dcfa8fd3781504d98dcf063d54fde.1540801392.git.tao3.xu@intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
include/hw/i386/pc.h | 10 +++++++++-
target/i386/cpu.c | 4 ++++
2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index dfe6746692..136fe497b6 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -300,7 +300,15 @@ bool e820_get_entry(int, uint32_t, uint64_t *, uint64_t *);
.driver = TYPE_X86_CPU,\
.property = "x-hv-synic-kvm-only",\
.value = "on",\
- }
+ },{\
+ .driver = "Skylake-Server" "-" TYPE_X86_CPU,\
+ .property = "pku",\
+ .value = "off",\
+ },{\
+ .driver = "Skylake-Server-IBRS" "-" TYPE_X86_CPU,\
+ .property = "pku",\
+ .value = "off",\
+ },

#define PC_COMPAT_2_12 \
HW_COMPAT_2_12 \
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 9f2e93bdae..af7e9f09cc 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -2392,6 +2392,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL | CPUID_7_0_EBX_CLFLUSHOPT,
+ .features[FEAT_7_0_ECX] =
+ CPUID_7_0_ECX_PKU,
/* Missing: XSAVES (not supported by some Linux versions,
* including v4.1 to v4.12).
* KVM doesn't yet expose any XSAVES state save component,
@@ -2442,6 +2444,8 @@ static X86CPUDefinition builtin_x86_defs[] = {
CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512DQ |
CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512CD |
CPUID_7_0_EBX_AVX512VL,
+ .features[FEAT_7_0_ECX] =
+ CPUID_7_0_ECX_PKU,
/* Missing: XSAVES (not supported by some Linux versions,
* including v4.1 to v4.12).
* KVM doesn't yet expose any XSAVES state save component,
--
2.18.0.rc1.1.g3f1ff2140