diff mbox series

[v9,06/11] KVM: arm64: Bump up the default KVM sanitised debug version to v8p8

Message ID 20230821212243.491660-7-jingzhangos@google.com (mailing list archive)
State New, archived
Headers show
Series Enable writable for idregs DFR0,PFR0, MMFR{0,1,2,3} | expand

Commit Message

Jing Zhang Aug. 21, 2023, 9:22 p.m. UTC 
From: Oliver Upton <oliver.upton@linux.dev>

Since ID_AA64DFR0_EL1 and ID_DFR0_EL1 are now writable from userspace,
it is safe to bump up the default KVM sanitised debug version to v8p8.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Jing Zhang <jingzhangos@google.com>
---
 arch/arm64/kvm/sys_regs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 20fc38bad4e8..cee5f879df19 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1489,8 +1489,7 @@  static u64 read_sanitised_id_aa64dfr0_el1(struct kvm_vcpu *vcpu,
 {
 	u64 val = read_sanitised_ftr_reg(SYS_ID_AA64DFR0_EL1);
 
-	/* Limit debug to ARMv8.0 */
-	val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, IMP);
+	val = ID_REG_LIMIT_FIELD_ENUM(val, ID_AA64DFR0_EL1, DebugVer, V8P8);
 
 	/*
 	 * Only initialize the PMU version if the vCPU was configured with one.
@@ -1550,6 +1549,8 @@  static u64 read_sanitised_id_dfr0_el1(struct kvm_vcpu *vcpu,
 	if (kvm_vcpu_has_pmu(vcpu))
 		val |= SYS_FIELD_PREP(ID_DFR0_EL1, PerfMon, perfmon);
 
+	val = ID_REG_LIMIT_FIELD_ENUM(val, ID_DFR0_EL1, CopDbg, Debugv8p8);
+
 	return val;
 }