linux-kernel - [PATCH] KVM: arm64: Update kvm_arm_exception_class and esr_class

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Date:   Sat, 13 Jul 2019 04:40:54 +0000
From:   Zenghui Yu <yuzenghui@...wei.com>
To:     <marc.zyngier@....com>, <kvmarm@...ts.cs.columbia.edu>,
        <linux-arm-kernel@...ts.infradead.org>, <catalin.marinas@....com>,
        <will@...nel.org>
CC:     <james.morse@....com>, <julien.thierry@....com>,
        <suzuki.poulose@....com>, <mark.rutland@....com>,
        <linux-kernel@...r.kernel.org>, <amit.kachhap@....com>,
        <Dave.Martin@....com>, <wanghaibin.wang@...wei.com>,
        Zenghui Yu <yuzenghui@...wei.com>
Subject: [PATCH] KVM: arm64: Update kvm_arm_exception_class and esr_class_str for new EC

We've added two ESR exception classes for new ARM hardware extensions:
ESR_ELx_EC_PAC and ESR_ELx_EC_SVE.

This patch updates "kvm_arm_exception_class" for these two EC, which the
new EC will be parsed in kvm_exit trace events (for guest's usage of
Pointer Authentication and Scalable Vector Extension).  The same updates
to "esr_class_str" for ESR_ELx_EC_PAC, by which we can get more accurate
debug info.  Trivial changes, update them in one go.

Cc: Marc Zyngier <marc.zyngier@....com>
Cc: Catalin Marinas <catalin.marinas@....com>
Cc: Will Deacon <will@...nel.org>
Cc: Mark Rutland <mark.rutland@....com>
Cc: Dave Martin <Dave.Martin@....com>
Signed-off-by: Zenghui Yu <yuzenghui@...wei.com>
---
 arch/arm64/include/asm/kvm_arm.h | 7 ++++---
 arch/arm64/kernel/traps.c        | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
index a8b205e..ddf9d76 100644
--- a/arch/arm64/include/asm/kvm_arm.h
+++ b/arch/arm64/include/asm/kvm_arm.h
@@ -316,9 +316,10 @@
 
 #define kvm_arm_exception_class \
 	ECN(UNKNOWN), ECN(WFx), ECN(CP15_32), ECN(CP15_64), ECN(CP14_MR), \
-	ECN(CP14_LS), ECN(FP_ASIMD), ECN(CP10_ID), ECN(CP14_64), ECN(SVC64), \
-	ECN(HVC64), ECN(SMC64), ECN(SYS64), ECN(IMP_DEF), ECN(IABT_LOW), \
-	ECN(IABT_CUR), ECN(PC_ALIGN), ECN(DABT_LOW), ECN(DABT_CUR), \
+	ECN(CP14_LS), ECN(FP_ASIMD), ECN(CP10_ID), ECN(PAC), ECN(CP14_64), \
+	ECN(SVC64), ECN(HVC64), ECN(SMC64), ECN(SYS64), ECN(SVE), \
+	ECN(IMP_DEF), ECN(IABT_LOW), ECN(IABT_CUR), \
+	ECN(PC_ALIGN), ECN(DABT_LOW), ECN(DABT_CUR), \
 	ECN(SP_ALIGN), ECN(FP_EXC32), ECN(FP_EXC64), ECN(SERROR), \
 	ECN(BREAKPT_LOW), ECN(BREAKPT_CUR), ECN(SOFTSTP_LOW), \
 	ECN(SOFTSTP_CUR), ECN(WATCHPT_LOW), ECN(WATCHPT_CUR), \
diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index 8c03456..969e156 100644
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -734,6 +734,7 @@ asmlinkage void __exception do_sysinstr(unsigned int esr, struct pt_regs *regs)
 	[ESR_ELx_EC_CP14_LS]		= "CP14 LDC/STC",
 	[ESR_ELx_EC_FP_ASIMD]		= "ASIMD",
 	[ESR_ELx_EC_CP10_ID]		= "CP10 MRC/VMRS",
+	[ESR_ELx_EC_PAC]		= "PAC",
 	[ESR_ELx_EC_CP14_64]		= "CP14 MCRR/MRRC",
 	[ESR_ELx_EC_ILL]		= "PSTATE.IL",
 	[ESR_ELx_EC_SVC32]		= "SVC (AArch32)",
-- 
1.8.3.1