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Tue, 5 Feb 2019 16:38:34 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1549345115; bh=X16Gq3rNmDTQYV8cGY+KWTsZ5N86urKLsMU2ph4SU7U=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Fm2gDI8RLLuQ42uZHzJ/arLtgUd9ulFvBgHE/2FNtW7GCkTrwSsKRE5bMVyy3bYZm A52n64A1psGwPvwTzy5exkMTrmH3SRghmvDDZ6FVtBU0z9NzeJLtJQNZT5nMf/1zwh PJRqW5PWmRunPdI0/TrYmnlTxgSB1iZhh6ANnD5M= Date: Tue, 5 Feb 2019 16:32:33 +1100 From: David Gibson To: =?iso-8859-1?Q?C=E9dric?= Le Goater Subject: Re: [PATCH 15/19] KVM: PPC: Book3S HV: add get/set accessors for the source configuration Message-ID: <20190205053233.GG22661@umbus.fritz.box> References: <20190107184331.8429-1-clg@kaod.org> <20190107184331.8429-16-clg@kaod.org> <20190204052148.GH1927@umbus.fritz.box> <02ee0470-3c6a-5c5c-a903-44e172ce1ed5@kaod.org> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="+sHJum3is6Tsg7/J" Content-Disposition: inline In-Reply-To: <02ee0470-3c6a-5c5c-a903-44e172ce1ed5@kaod.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, Paul Mackerras , linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" --+sHJum3is6Tsg7/J Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Feb 04, 2019 at 05:07:28PM +0100, C=E9dric Le Goater wrote: > On 2/4/19 6:21 AM, David Gibson wrote: > > On Mon, Jan 07, 2019 at 07:43:27PM +0100, C=E9dric Le Goater wrote: > >> Theses are use to capure the XIVE EAS table of the KVM device, the > >> configuration of the source targets. > >> > >> Signed-off-by: C=E9dric Le Goater > >> --- > >> arch/powerpc/include/uapi/asm/kvm.h | 11 ++++ > >> arch/powerpc/kvm/book3s_xive_native.c | 87 +++++++++++++++++++++++++++ > >> 2 files changed, 98 insertions(+) > >> > >> diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/includ= e/uapi/asm/kvm.h > >> index 1a8740629acf..faf024f39858 100644 > >> --- a/arch/powerpc/include/uapi/asm/kvm.h > >> +++ b/arch/powerpc/include/uapi/asm/kvm.h > >> @@ -683,9 +683,20 @@ struct kvm_ppc_cpu_char { > >> #define KVM_DEV_XIVE_SAVE_EQ_PAGES 4 > >> #define KVM_DEV_XIVE_GRP_SOURCES 2 /* 64-bit source attributes */ > >> #define KVM_DEV_XIVE_GRP_SYNC 3 /* 64-bit source attributes */ > >> +#define KVM_DEV_XIVE_GRP_EAS 4 /* 64-bit eas attributes */ > >> =20 > >> /* Layout of 64-bit XIVE source attribute values */ > >> #define KVM_XIVE_LEVEL_SENSITIVE (1ULL << 0) > >> #define KVM_XIVE_LEVEL_ASSERTED (1ULL << 1) > >> =20 > >> +/* Layout of 64-bit eas attribute values */ > >> +#define KVM_XIVE_EAS_PRIORITY_SHIFT 0 > >> +#define KVM_XIVE_EAS_PRIORITY_MASK 0x7 > >> +#define KVM_XIVE_EAS_SERVER_SHIFT 3 > >> +#define KVM_XIVE_EAS_SERVER_MASK 0xfffffff8ULL > >> +#define KVM_XIVE_EAS_MASK_SHIFT 32 > >> +#define KVM_XIVE_EAS_MASK_MASK 0x100000000ULL > >> +#define KVM_XIVE_EAS_EISN_SHIFT 33 > >> +#define KVM_XIVE_EAS_EISN_MASK 0xfffffffe00000000ULL > >> + > >> #endif /* __LINUX_KVM_POWERPC_H */ > >> diff --git a/arch/powerpc/kvm/book3s_xive_native.c b/arch/powerpc/kvm/= book3s_xive_native.c > >> index f2de1bcf3b35..0468b605baa7 100644 > >> --- a/arch/powerpc/kvm/book3s_xive_native.c > >> +++ b/arch/powerpc/kvm/book3s_xive_native.c > >> @@ -525,6 +525,88 @@ static int kvmppc_xive_native_sync(struct kvmppc_= xive *xive, long irq, u64 addr) > >> return 0; > >> } > >> =20 > >> +static int kvmppc_xive_native_set_eas(struct kvmppc_xive *xive, long = irq, > >> + u64 addr) > >=20 > > I'd prefer to avoid the name "EAS" here. IIUC these aren't "raw" EAS > > values, but rather essentially the "source config" in the terminology > > of the PAPR hcalls. Which, yes, is basically implemented by setting > > the EAS, but since it's the PAPR architected state that we need to > > preserve across migration, I'd prefer to stick as close as we can to > > the PAPR terminology. >=20 > But we don't have an equivalent name in the PAPR specs for the tuple=20 > (prio, server). We could use the generic 'target' name may be ? even=20 > if this is usually referring to a CPU number. Um.. what? That's about terminology for one of the fields in this thing, not about the name for the thing itself. > Or, IVE (Interrupt Vector Entry) ? which makes some sense.=20 > This is was the former name in HW. I think we recycle it for KVM. That's a terrible idea, which will make a confusing situation even more confusing. --=20 David Gibson | I'll have my music baroque, and my code david AT gibson.dropbear.id.au | minimalist, thank you. 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