| Message ID | 20180917104144.19188-16-suzuki.poulose@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | kvm: arm64: Dynamic IPA and 52bit IPA | expand |
Hi Suzuki, On 9/17/18 12:41 PM, Suzuki K Poulose wrote: > Add support for handling 52bit addresses in PAR to HPFAR > conversion. Instead of hardcoding the address limits, we > now use PHYS_MASK_SHIFT. > > Cc: Marc Zyngier <marc.zyngier@arm.com> > Cc: Christoffer Dall <cdall@kernel.org> > Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Reviewed-by: Eric Auger <eric.auger@redhat.com> Thanks Eric > --- > arch/arm64/include/asm/kvm_arm.h | 7 +++++++ > arch/arm64/kvm/hyp/switch.c | 2 +- > 2 files changed, 8 insertions(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h > index 0a37c0513ede..241d1622fa19 100644 > --- a/arch/arm64/include/asm/kvm_arm.h > +++ b/arch/arm64/include/asm/kvm_arm.h > @@ -308,6 +308,13 @@ > > /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ > #define HPFAR_MASK (~UL(0xf)) > +/* > + * We have > + * PAR [PA_Shift - 1 : 12] = PA [PA_Shift - 1 : 12] > + * HPFAR [PA_Shift - 9 : 4] = FIPA [PA_Shift - 1 : 12] > + */ > +#define PAR_TO_HPFAR(par) \ > + (((par) & GENMASK_ULL(PHYS_MASK_SHIFT - 1, 12)) >> 8) > > #define kvm_arm_exception_type \ > {0, "IRQ" }, \ > diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c > index 9d5ce1a3039a..7cc175c88a37 100644 > --- a/arch/arm64/kvm/hyp/switch.c > +++ b/arch/arm64/kvm/hyp/switch.c > @@ -263,7 +263,7 @@ static bool __hyp_text __translate_far_to_hpfar(u64 far, u64 *hpfar) > return false; /* Translation failed, back to guest */ > > /* Convert PAR to HPFAR format */ > - *hpfar = ((tmp >> 12) & ((1UL << 36) - 1)) << 4; > + *hpfar = PAR_TO_HPFAR(tmp); > return true; > } > >
diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 0a37c0513ede..241d1622fa19 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -308,6 +308,13 @@ /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ #define HPFAR_MASK (~UL(0xf)) +/* + * We have + * PAR [PA_Shift - 1 : 12] = PA [PA_Shift - 1 : 12] + * HPFAR [PA_Shift - 9 : 4] = FIPA [PA_Shift - 1 : 12] + */ +#define PAR_TO_HPFAR(par) \ + (((par) & GENMASK_ULL(PHYS_MASK_SHIFT - 1, 12)) >> 8) #define kvm_arm_exception_type \ {0, "IRQ" }, \ diff --git a/arch/arm64/kvm/hyp/switch.c b/arch/arm64/kvm/hyp/switch.c index 9d5ce1a3039a..7cc175c88a37 100644 --- a/arch/arm64/kvm/hyp/switch.c +++ b/arch/arm64/kvm/hyp/switch.c @@ -263,7 +263,7 @@ static bool __hyp_text __translate_far_to_hpfar(u64 far, u64 *hpfar) return false; /* Translation failed, back to guest */ /* Convert PAR to HPFAR format */ - *hpfar = ((tmp >> 12) & ((1UL << 36) - 1)) << 4; + *hpfar = PAR_TO_HPFAR(tmp); return true; }
Add support for handling 52bit addresses in PAR to HPFAR conversion. Instead of hardcoding the address limits, we now use PHYS_MASK_SHIFT. Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Christoffer Dall <cdall@kernel.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- arch/arm64/include/asm/kvm_arm.h | 7 +++++++ arch/arm64/kvm/hyp/switch.c | 2 +- 2 files changed, 8 insertions(+), 1 deletion(-)