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authorMarc Zyngier <marc.zyngier@arm.com>2018-08-06 15:03:36 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2018-08-12 14:06:35 +0300
commit03bd646d863d1e4399d9dec658e1e5735f24cd2c (patch)
treeebfbc2ab4b1c2147f476b5a69d9627901a2a9fca /arch/arm64
parent6249f2a479268702f7259aeee3671db2be3b922c (diff)
downloadlinux-03bd646d863d1e4399d9dec658e1e5735f24cd2c.tar.xz
KVM: arm64: vgic-v3: Add support for ICC_SGI0R_EL1 and ICC_ASGI1R_EL1 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/arm64')
-rw-r--r--arch/arm64/include/asm/sysreg.h2
-rw-r--r--arch/arm64/kvm/sys_regs.c41
2 files changed, 41 insertions, 2 deletions
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 98af0b37fb31..b0d2a52a71a3 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -314,6 +314,8 @@
#define SYS_ICC_DIR_EL1 sys_reg(3, 0, 12, 11, 1)
#define SYS_ICC_RPR_EL1 sys_reg(3, 0, 12, 11, 3)
#define SYS_ICC_SGI1R_EL1 sys_reg(3, 0, 12, 11, 5)
+#define SYS_ICC_ASGI1R_EL1 sys_reg(3, 0, 12, 11, 6)
+#define SYS_ICC_SGI0R_EL1 sys_reg(3, 0, 12, 11, 7)
#define SYS_ICC_IAR1_EL1 sys_reg(3, 0, 12, 12, 0)
#define SYS_ICC_EOIR1_EL1 sys_reg(3, 0, 12, 12, 1)
#define SYS_ICC_HPPIR1_EL1 sys_reg(3, 0, 12, 12, 2)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index aba6755c816d..22fbbdbece3c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -252,10 +252,43 @@ static bool access_gic_sgi(struct kvm_vcpu *vcpu,
struct sys_reg_params *p,
const struct sys_reg_desc *r)
{
+ bool g1;
+
if (!p->is_write)
return read_from_write_only(vcpu, p, r);
- vgic_v3_dispatch_sgi(vcpu, p->regval, true);
+ /*
+ * In a system where GICD_CTLR.DS=1, a ICC_SGI0R_EL1 access generates
+ * Group0 SGIs only, while ICC_SGI1R_EL1 can generate either group,
+ * depending on the SGI configuration. ICC_ASGI1R_EL1 is effectively
+ * equivalent to ICC_SGI0R_EL1, as there is no "alternative" secure
+ * group.
+ */
+ if (p->is_aarch32) {
+ 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;
+ }
+ } else {
+ switch (p->Op2) {
+ default: /* Keep GCC quiet */
+ case 5: /* ICC_SGI1R_EL1 */
+ g1 = true;
+ break;
+ case 6: /* ICC_ASGI1R_EL1 */
+ case 7: /* ICC_SGI0R_EL1 */
+ g1 = false;
+ break;
+ }
+ }
+
+ vgic_v3_dispatch_sgi(vcpu, p->regval, g1);
return true;
}
@@ -1312,6 +1345,8 @@ static const struct sys_reg_desc sys_reg_descs[] = {
{ SYS_DESC(SYS_ICC_DIR_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_RPR_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_SGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_ASGI1R_EL1), access_gic_sgi },
+ { SYS_DESC(SYS_ICC_SGI0R_EL1), access_gic_sgi },
{ SYS_DESC(SYS_ICC_IAR1_EL1), write_to_read_only },
{ SYS_DESC(SYS_ICC_EOIR1_EL1), read_from_write_only },
{ SYS_DESC(SYS_ICC_HPPIR1_EL1), write_to_read_only },
@@ -1744,8 +1779,10 @@ static const struct sys_reg_desc cp15_regs[] = {
static const struct sys_reg_desc cp15_64_regs[] = {
{ Op1( 0), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR0 },
{ Op1( 0), CRn( 0), CRm( 9), Op2( 0), access_pmu_evcntr },
- { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi },
+ { Op1( 0), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI1R */
{ Op1( 1), CRn( 0), CRm( 2), Op2( 0), access_vm_reg, NULL, c2_TTBR1 },
+ { Op1( 1), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_ASGI1R */
+ { Op1( 2), CRn( 0), CRm(12), Op2( 0), access_gic_sgi }, /* ICC_SGI0R */
{ Op1( 2), CRn( 0), CRm(14), Op2( 0), access_cntp_cval },
};