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authorMarc Zyngier <marc.zyngier@arm.com>2018-08-06 15:06:01 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2018-08-12 14:06:35 +0300
commit3e8a8a50c7ef1a4f71921731f0e1748a7f70ddaa (patch)
tree06b4b97906e1254378da63d3b82ea244653093c3 /arch/arm/kvm
parent03bd646d863d1e4399d9dec658e1e5735f24cd2c (diff)
downloadlinux-3e8a8a50c7ef1a4f71921731f0e1748a7f70ddaa.tar.xz
KVM: arm: vgic-v3: Add support for ICC_SGI0R and ICC_ASGI1R accesses
In order to generate Group0 SGIs, let's add some decoding logic to access_gic_sgi(), and pass the generating group accordingly. Reviewed-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'arch/arm/kvm')
-rw-r--r--arch/arm/kvm/coproc.c25
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/arm/kvm/coproc.c b/arch/arm/kvm/coproc.c
index b17c52608a19..450c7a4fbc8a 100644
--- a/arch/arm/kvm/coproc.c
+++ b/arch/arm/kvm/coproc.c
@@ -246,6 +246,7 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
const struct coproc_reg *r)
{
u64 reg;
+ bool g1;
if (!p->is_write)
return read_from_write_only(vcpu, p);
@@ -253,7 +254,25 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
reg = (u64)*vcpu_reg(vcpu, p->Rt2) << 32;
reg |= *vcpu_reg(vcpu, p->Rt1) ;
- vgic_v3_dispatch_sgi(vcpu, reg, true);
+ /*
+ * In a system where GICD_CTLR.DS=1, a ICC_SGI0R access generates
+ * Group0 SGIs only, while ICC_SGI1R can generate either group,
+ * depending on the SGI configuration. ICC_ASGI1R is effectively
+ * equivalent to ICC_SGI0R, as there is no "alternative" secure
+ * group.
+ */
+ switch (p->Op1) {
+ default: /* Keep GCC quiet */
+ case 0: /* ICC_SGI1R */
+ g1 = true;
+ break;
+ case 1: /* ICC_ASGI1R */
+ case 2: /* ICC_SGI0R */
+ g1 = false;
+ break;
+ }
+
+ vgic_v3_dispatch_sgi(vcpu, reg, g1);
return true;
}
@@ -459,6 +478,10 @@ static const struct coproc_reg cp15_regs[] = {
/* ICC_SGI1R */
{ CRm64(12), Op1( 0), is64, access_gic_sgi},
+ /* ICC_ASGI1R */
+ { CRm64(12), Op1( 1), is64, access_gic_sgi},
+ /* ICC_SGI0R */
+ { CRm64(12), Op1( 2), is64, access_gic_sgi},
/* VBAR: swapped by interrupt.S. */
{ CRn(12), CRm( 0), Op1( 0), Op2( 0), is32,