linux-kernel - [PATCH 17/22] arm64/kvm: Make use of the system wide safe values

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Message-Id: <1442413280-31885-18-git-send-email-suzuki.poulose@arm.com>
Date:	Wed, 16 Sep 2015 15:21:15 +0100
From:	"Suzuki K. Poulose" <suzuki.poulose@....com>
To:	linux-arm-kernel@...ts.infradead.org
Cc:	Catalin.Marinas@....com, Will.Deacon@....com, Mark.Rutland@....com,
	edward.nevill@...aro.org, aph@...hat.com,
	linux-kernel@...r.kernel.org, andre.przywara@....com,
	ard.biesheuvel@...aro.org, dave.martin@....com,
	marc.zyngier@....com, "Suzuki K. Poulose" <suzuki.poulose@....com>
Subject: [PATCH 17/22] arm64/kvm: Make use of the system wide safe values

From: "Suzuki K. Poulose" <suzuki.poulose@....com>

Use the system wide safe value from the new API for safer
decisions

Signed-off-by: Suzuki K. Poulose <suzuki.poulose@....com>
---
 arch/arm64/kvm/reset.c    |    2 +-
 arch/arm64/kvm/sys_regs.c |   12 ++++++------
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c
index 91cf535..f34745c 100644
--- a/arch/arm64/kvm/reset.c
+++ b/arch/arm64/kvm/reset.c
@@ -53,7 +53,7 @@ static bool cpu_has_32bit_el1(void)
 {
 	u64 pfr0;
 
-	pfr0 = read_cpuid(ID_AA64PFR0_EL1);
+	pfr0 = read_system_reg(SYS_ID_AA64PFR0_EL1);
 	return !!(pfr0 & 0x20);
 }
 
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index b41607d..fe19206 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -700,13 +700,13 @@ static bool trap_dbgidr(struct kvm_vcpu *vcpu,
 	if (p->is_write) {
 		return ignore_write(vcpu, p);
 	} else {
-		u64 dfr = read_cpuid(ID_AA64DFR0_EL1);
-		u64 pfr = read_cpuid(ID_AA64PFR0_EL1);
-		u32 el3 = !!((pfr >> 12) & 0xf);
+		u64 dfr = read_system_reg(SYS_ID_AA64DFR0_EL1);
+		u64 pfr = read_system_reg(SYS_ID_AA64PFR0_EL1);
+		u32 el3 = !!cpuid_feature_extract_field(pfr, ID_AA64PFR0_EL3_SHIFT);
 
-		*vcpu_reg(vcpu, p->Rt) = ((((dfr >> 20) & 0xf) << 28) |
-					  (((dfr >> 12) & 0xf) << 24) |
-					  (((dfr >> 28) & 0xf) << 20) |
+		*vcpu_reg(vcpu, p->Rt) = ((((dfr >> ID_AA64DFR0_WRPS_SHIFT) & 0xf) << 28) |
+					  (((dfr >> ID_AA64DFR0_BRPS_SHIFT) & 0xf) << 24) |
+					  (((dfr >> ID_AA64DFR0_CTX_CMPS_SHIFT) & 0xf) << 20) |
 					  (6 << 16) | (el3 << 14) | (el3 << 12));
 		return true;
 	}
-- 
1.7.9.5

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