From: Claudio Carvalho <cclaudio@linux.ibm.com>
To: linuxppc-dev@ozlabs.org
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>,
Michael Anderson <andmike@linux.ibm.com>,
Ram Pai <linuxram@us.ibm.com>,
Claudio Carvalho <cclaudio@linux.ibm.com>,
kvm-ppc@vger.kernel.org, Bharata B Rao <bharata@linux.ibm.com>,
Ryan Grimm <grimm@linux.ibm.com>,
Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
Thiago Bauermann <bauerman@linux.ibm.com>,
Anshuman Khandual <khandual@linux.vnet.ibm.com>
Subject: [PATCH v4 1/8] KVM: PPC: Ultravisor: Introduce the MSR_S bit
Date: Fri, 28 Jun 2019 17:08:18 -0300 [thread overview]
Message-ID: <20190628200825.31049-2-cclaudio@linux.ibm.com> (raw)
In-Reply-To: <20190628200825.31049-1-cclaudio@linux.ibm.com>
From: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
The ultravisor processor mode is introduced in POWER platforms that
supports the Protected Execution Facility (PEF). Ultravisor is higher
privileged than hypervisor mode.
In PEF enabled platforms, the MSR_S bit is used to indicate if the
thread is in secure state. With the MSR_S bit, the privilege state of
the thread is now determined by MSR_S, MSR_HV and MSR_PR, as follows:
S HV PR
-----------------------
0 x 1 problem
1 0 1 problem
x x 0 privileged
x 1 0 hypervisor
1 1 0 ultravisor
1 1 1 reserved
The hypervisor doesn't (and can't) run with the MSR_S bit set, but a
secure guest and the ultravisor firmware do.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
[ Update the commit message ]
Signed-off-by: Claudio Carvalho <cclaudio@linux.ibm.com>
---
arch/powerpc/include/asm/reg.h | 3 +++
1 file changed, 3 insertions(+)
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 10caa145f98b..39b4c0a519f5 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -38,6 +38,7 @@
#define MSR_TM_LG 32 /* Trans Mem Available */
#define MSR_VEC_LG 25 /* Enable AltiVec */
#define MSR_VSX_LG 23 /* Enable VSX */
+#define MSR_S_LG 22 /* Secure VM bit */
#define MSR_POW_LG 18 /* Enable Power Management */
#define MSR_WE_LG 18 /* Wait State Enable */
#define MSR_TGPR_LG 17 /* TLB Update registers in use */
@@ -71,11 +72,13 @@
#define MSR_SF __MASK(MSR_SF_LG) /* Enable 64 bit mode */
#define MSR_ISF __MASK(MSR_ISF_LG) /* Interrupt 64b mode valid on 630 */
#define MSR_HV __MASK(MSR_HV_LG) /* Hypervisor state */
+#define MSR_S __MASK(MSR_S_LG) /* Secure state */
#else
/* so tests for these bits fail on 32-bit */
#define MSR_SF 0
#define MSR_ISF 0
#define MSR_HV 0
+#define MSR_S 0
#endif
/*
--
2.20.1
next prev parent reply other threads:[~2019-06-28 20:13 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-28 20:08 [PATCH v4 0/8] kvmppc: Paravirtualize KVM to support ultravisor Claudio Carvalho
2019-06-28 20:08 ` Claudio Carvalho [this message]
2019-07-08 17:38 ` [PATCH v4 1/8] KVM: PPC: Ultravisor: Introduce the MSR_S bit janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-12 0:59 ` Nicholas Piggin
2019-07-12 0:57 ` Nicholas Piggin
2019-07-12 6:29 ` Michael Ellerman
2019-07-12 21:07 ` Claudio Carvalho
2019-06-28 20:08 ` [PATCH v4 2/8] powerpc: Introduce FW_FEATURE_ULTRAVISOR Claudio Carvalho
2019-07-08 17:40 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-12 18:01 ` Claudio Carvalho
2019-07-15 4:10 ` Michael Ellerman
2019-06-28 20:08 ` [PATCH v4 3/8] KVM: PPC: Ultravisor: Add generic ultravisor call handler Claudio Carvalho
2019-07-08 17:55 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-13 17:42 ` Claudio Carvalho
2019-07-15 4:46 ` Michael Ellerman
2019-07-12 1:18 ` Nicholas Piggin
2019-06-28 20:08 ` [PATCH v4 4/8] KVM: PPC: Ultravisor: Use UV_WRITE_PATE ucall to register a PATE Claudio Carvalho
2019-07-08 17:57 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-17 14:59 ` Ryan Grimm
2019-07-18 21:25 ` Claudio Carvalho
2019-07-19 2:25 ` Michael Ellerman
2019-06-28 20:08 ` [PATCH v4 5/8] KVM: PPC: Ultravisor: Restrict flush of the partition tlb cache Claudio Carvalho
2019-07-01 5:54 ` Alexey Kardashevskiy
2019-07-08 20:05 ` Claudio Carvalho
2019-07-08 19:54 ` janani
2019-07-10 17:09 ` Ram Pai
2019-06-28 20:08 ` [PATCH v4 6/8] KVM: PPC: Ultravisor: Restrict LDBAR access Claudio Carvalho
2019-07-01 5:54 ` Alexey Kardashevskiy
2019-07-01 6:17 ` maddy
2019-07-01 6:30 ` Alexey Kardashevskiy
2019-07-01 6:46 ` Ram Pai
2019-07-13 17:56 ` Claudio Carvalho
2019-07-08 20:22 ` janani
2019-07-11 12:57 ` Michael Ellerman
2019-07-15 0:38 ` Claudio Carvalho
2019-06-28 20:08 ` [PATCH v4 7/8] KVM: PPC: Ultravisor: Enter a secure guest Claudio Carvalho
2019-07-08 20:53 ` janani
2019-07-08 20:52 ` Claudio Carvalho
2019-07-11 12:57 ` Michael Ellerman
2019-07-18 2:47 ` Sukadev Bhattiprolu
2019-07-22 11:05 ` Michael Ellerman
2019-07-12 2:03 ` Nicholas Piggin
2019-06-28 20:08 ` [PATCH v4 8/8] KVM: PPC: Ultravisor: Check for MSR_S during hv_reset_msr Claudio Carvalho
2019-07-08 20:54 ` janani
2019-07-11 12:57 ` Michael Ellerman
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