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a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1629364304; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=5d4iIB0YG1Q2hWgNlSdl1akO53LgRUYySs/vk80Xn1E=; b=tOccwLs57K0bVzPo3j9bruI3oVhLNMvFX4PLM4rY+te0SEJ/eFBlKrgcBl/lC91LfSSZzX 6h5pYcB5+wUIDjZGCZDosSM+89Fx86KT2c62eeEeOBmX32YXNjgILf6TZ377Xm/kNQlPAp PBQOiHmcprHI6mTj585g935nUcIDVFs= To: Jan Beulich , "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , George Dunlap , Ian Jackson , Anthony Perard , Marek Marczykowski References: <0bebfe8c-6897-dc8b-7fe0-9127d4996eb8@suse.com> <4b68233b-259c-3308-3292-82e991e1e108@suse.com> From: Juergen Gross Subject: Re: [PATCH v2 02/13] libxc: split xc_logdirty_control() from xc_shadow_control() Message-ID: <7284e7d0-99cc-e35d-2d44-46e7a3132498@suse.com> Date: Thu, 19 Aug 2021 11:11:43 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 MIME-Version: 1.0 In-Reply-To: <4b68233b-259c-3308-3292-82e991e1e108@suse.com> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="43B1P5PSPfewMbPCclw4YdyC2HZcr0FaY" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --43B1P5PSPfewMbPCclw4YdyC2HZcr0FaY Content-Type: multipart/mixed; boundary="3ieqkwsXAUlMLWqSzM3vZ4wqjZxzr95KD"; protected-headers="v1" From: Juergen Gross To: Jan Beulich , "xen-devel@lists.xenproject.org" Cc: Andrew Cooper , Wei Liu , =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= , George Dunlap , Ian Jackson , Anthony Perard , Marek Marczykowski Message-ID: <7284e7d0-99cc-e35d-2d44-46e7a3132498@suse.com> Subject: Re: [PATCH v2 02/13] libxc: split xc_logdirty_control() from xc_shadow_control() References: <0bebfe8c-6897-dc8b-7fe0-9127d4996eb8@suse.com> <4b68233b-259c-3308-3292-82e991e1e108@suse.com> In-Reply-To: <4b68233b-259c-3308-3292-82e991e1e108@suse.com> --3ieqkwsXAUlMLWqSzM3vZ4wqjZxzr95KD Content-Type: multipart/mixed; boundary="------------A5D1C8DF2512E6DE871117B5" Content-Language: en-US This is a multi-part message in MIME format. --------------A5D1C8DF2512E6DE871117B5 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable On 05.07.21 17:12, Jan Beulich wrote: > For log-dirty operations a 64-bit field is being truncated to become an= > "int" return value. Seeing the large number of arguments the present > function takes, reduce its set of parameters to that needed for all > operations not involving the log-dirty bitmap, while introducing a new > wrapper for the log-dirty bitmap operations. This new function in turn > doesn't need an "mb" parameter, but has a 64-bit return type. (Using th= e > return value in favor of a pointer-type parameter is left as is, to > disturb callers as little as possible.) >=20 > While altering xc_shadow_control() anyway, also adjust the types of the= > last two of the remaining parameters. >=20 > Signed-off-by: Jan Beulich > Acked-by: Christian Lindig > --- > v2: Avoid new use of DECLARE_DOMCTL. Re-base over error handling fix to= > libxl__arch_domain_create(). > --- > I wonder whether we shouldn't take the opportunity and also rename > xc_shadow_control() to, say, xc_paging_control(), matching the layer > above the HAP/shadow distinction in the hypervisor. >=20 > --- a/tools/include/xenctrl.h > +++ b/tools/include/xenctrl.h > @@ -885,11 +885,15 @@ typedef struct xen_domctl_shadow_op_stat > int xc_shadow_control(xc_interface *xch, > uint32_t domid, > unsigned int sop, > - xc_hypercall_buffer_t *dirty_bitmap, > - unsigned long pages, > - unsigned long *mb, > - uint32_t mode, > - xc_shadow_op_stats_t *stats); > + unsigned int *mb, > + unsigned int mode); > +long long xc_logdirty_control(xc_interface *xch, > + uint32_t domid, > + unsigned int sop, > + xc_hypercall_buffer_t *dirty_bitmap, > + unsigned long pages, > + unsigned int mode, > + xc_shadow_op_stats_t *stats); > =20 > int xc_sched_credit_domain_set(xc_interface *xch, > uint32_t domid, > --- a/tools/libs/ctrl/xc_domain.c > +++ b/tools/libs/ctrl/xc_domain.c > @@ -650,25 +650,49 @@ int xc_watchdog(xc_interface *xch, > int xc_shadow_control(xc_interface *xch, > uint32_t domid, > unsigned int sop, > - xc_hypercall_buffer_t *dirty_bitmap, > - unsigned long pages, > - unsigned long *mb, > - uint32_t mode, > - xc_shadow_op_stats_t *stats) > + unsigned int *mb, > + unsigned int mode) > { > int rc; > DECLARE_DOMCTL; > - DECLARE_HYPERCALL_BUFFER_ARGUMENT(dirty_bitmap); > =20 > memset(&domctl, 0, sizeof(domctl)); > =20 > domctl.cmd =3D XEN_DOMCTL_shadow_op; > domctl.domain =3D domid; > domctl.u.shadow_op.op =3D sop; Shouldn't you verify that sop is not one of the operations now handled by xc_logdirty_control()? > - domctl.u.shadow_op.pages =3D pages; > domctl.u.shadow_op.mb =3D mb ? *mb : 0; > domctl.u.shadow_op.mode =3D mode; > - if (dirty_bitmap !=3D NULL) > + > + rc =3D do_domctl(xch, &domctl); > + > + if ( mb ) > + *mb =3D domctl.u.shadow_op.mb; > + > + return rc; > +} > + > +long long xc_logdirty_control(xc_interface *xch, > + uint32_t domid, > + unsigned int sop, > + xc_hypercall_buffer_t *dirty_bitmap, > + unsigned long pages, > + unsigned int mode, > + xc_shadow_op_stats_t *stats) > +{ > + int rc; > + struct xen_domctl domctl =3D { > + .cmd =3D XEN_DOMCTL_shadow_op, > + .domain =3D domid, > + .u.shadow_op =3D { > + .op =3D sop, And same here the other way round: sop should really only be one of XEN_DOMCTL_SHADOW_OP_CLEAN or XEN_DOMCTL_SHADOW_OP_PEEK. With that fixed you can add my: Reviewed-by: Juergen Gross Juergen --------------A5D1C8DF2512E6DE871117B5 Content-Type: application/pgp-keys; name="OpenPGP_0xB0DE9DD628BF132F.asc" Content-Transfer-Encoding: quoted-printable Content-Description: OpenPGP public key Content-Disposition: attachment; filename="OpenPGP_0xB0DE9DD628BF132F.asc" -----BEGIN PGP PUBLIC KEY BLOCK----- xsBNBFOMcBYBCACgGjqjoGvbEouQZw/ToiBg9W98AlM2QHV+iNHsEs7kxWhKMjrioyspZKOBy= cWx w3ie3j9uvg9EOB3aN4xiTv4qbnGiTr3oJhkB1gsb6ToJQZ8uxGq2kaV2KL9650I1SJvedYm8O= f8Z d621lSmoKOwlNClALZNew72NjJLEzTalU1OdT7/i1TXkH09XSSI8mEQ/ouNcMvIJNwQpd369y= 9bf IhWUiVXEK7MlRgUG6MvIj6Y3Am/BBLUVbDa4+gmzDC9ezlZkTZG2t14zWPvxXP3FAp2pkW0xq= G7/ 377qptDmrk42GlSKN4z76ELnLxussxc7I2hx18NUcbP8+uty4bMxABEBAAHNHEp1ZXJnZW4gR= 3Jv c3MgPGpnQHBmdXBmLm5ldD7CwHkEEwECACMFAlOMcBYCGwMHCwkIBwMCAQYVCAIJCgsEFgIDA= QIe AQIXgAAKCRCw3p3WKL8TL0KdB/93FcIZ3GCNwFU0u3EjNbNjmXBKDY4FUGNQH2lvWAUy+dnyT= hpw dtF/jQ6j9RwE8VP0+NXcYpGJDWlNb9/JmYqLiX2Q3TyevpB0CA3dbBQp0OW0fgCetToGIQrg0= MbD 1C/sEOv8Mr4NAfbauXjZlvTj30H2jO0u+6WGM6nHwbh2l5O8ZiHkH32iaSTfN7Eu5RnNVUJbv= oPH Z8SlM4KWm8rG+lIkGurqqu5gu8q8ZMKdsdGC4bBxdQKDKHEFExLJK/nRPFmAuGlId1E3fe10v= 5QL +qHI3EIPtyfE7i9Hz6rVwi7lWKgh7pe0ZvatAudZ+JNIlBKptb64FaiIOAWDCx1SzR9KdWVyZ= 2Vu IEdyb3NzIDxqZ3Jvc3NAc3VzZS5jb20+wsB5BBMBAgAjBQJTjHCvAhsDBwsJCAcDAgEGFQgCC= QoL BBYCAwECHgECF4AACgkQsN6d1ii/Ey/HmQf/RtI7kv5A2PS4RF7HoZhPVPogNVbC4YA6lW7Dr= Wf0 teC0RR3MzXfy6pJ+7KLgkqMlrAbN/8Dvjoz78X+5vhH/rDLa9BuZQlhFmvcGtCF8eR0T1v0nC= /nu AFVGy+67q2DH8As3KPu0344TBDpAvr2uYM4tSqxK4DURx5INz4ZZ0WNFHcqsfvlGJALDeE0Lh= ITT d9jLzdDad1pQSToCnLl6SBJZjDOX9QQcyUigZFtCXFst4dlsvddrxyqT1f17+2cFSdu7+ynLm= XBK 7abQ3rwJY8SbRO2iRulogc5vr/RLMMlscDAiDkaFQWLoqHHOdfO9rURssHNN8WkMnQfvUewRz= 80h SnVlcmdlbiBHcm9zcyA8amdyb3NzQG5vdmVsbC5jb20+wsB5BBMBAgAjBQJTjHDXAhsDBwsJC= AcD AgEGFQgCCQoLBBYCAwECHgECF4AACgkQsN6d1ii/Ey8PUQf/ehmgCI9jB9hlgexLvgOtf7PJn= FOX gMLdBQgBlVPO3/D9R8LtF9DBAFPNhlrsfIG/SqICoRCqUcJ96Pn3P7UUinFG/I0ECGF4EvTE1= jnD kfJZr6jrbjgyoZHiw/4BNwSTL9rWASyLgqlA8u1mf+c2yUwcGhgkRAd1gOwungxcwzwqgljf0= N51 N5JfVRHRtyfwq/ge+YEkDGcTU6Y0sPOuj4Dyfm8fJzdfHNQsWq3PnczLVELStJNdapwPOoE+l= otu fe3AM2vAEYJ9rTz3Cki4JFUsgLkHFqGZarrPGi1eyQcXeluldO3m91NK/1xMI3/+8jbO0tsn1= tqS EUGIJi7ox80eSnVlcmdlbiBHcm9zcyA8amdyb3NzQHN1c2UuZGU+wsB5BBMBAgAjBQJTjHDrA= hsD BwsJCAcDAgEGFQgCCQoLBBYCAwECHgECF4AACgkQsN6d1ii/Ey+LhQf9GL45eU5vOowA2u5N3= g3O ZUEBmDHVVbqMtzwlmNC4k9Kx39r5s2vcFl4tXqW7g9/ViXYuiDXb0RfUpZiIUW89siKrkzmQ5= dM7 wRqzgJpJwK8Bn2MIxAKArekWpiCKvBOB/Cc+3EXE78XdlxLyOi/NrmSGRIov0karw2RzMNOu5= D+j LRZQd1Sv27AR+IP3I8U4aqnhLpwhK7MEy9oCILlgZ1QZe49kpcumcZKORmzBTNh30FVKK1Evm= V2x AKDoaEOgQB4iFQLhJCdP1I5aSgM5IVFdn7v5YgEYuJYx37IoN1EblHI//x/e2AaIHpzK5h88N= Eaw QsaNRpNSrcfbFmAg987ATQRTjHAWAQgAyzH6AOODMBjgfWE9VeCgsrwH3exNAU32gLq2xvjpW= nHI s98ndPUDpnoxWQugJ6MpMncr0xSwFmHEgnSEjK/PAjppgmyc57BwKII3sV4on+gDVFJR6Y8ZR= wgn BC5mVM6JjQ5xDk8WRXljExRfUX9pNhdE5eBOZJrDRoLUmmjDtKzWaDhIg/+1Hzz93X4fCQkNV= bVF LELU9bMaLPBG/x5q4iYZ2k2ex6d47YE1ZFdMm6YBYMOljGkZKwYde5ldM9mo45mmwe0icXKLk= pEd IXKTZeKDO+Hdv1aqFuAcccTg9RXDQjmwhC3yEmrmcfl0+rPghO0Iv3OOImwTEe4co3c1mwARA= QAB wsBfBBgBAgAJBQJTjHAWAhsMAAoJELDendYovxMvQ/gH/1ha96vm4P/L+bQpJwrZ/dneZcmEw= Tbe 8YFsw2V/Buv6Z4Mysln3nQK5ZadD534CF7TDVft7fC4tU4PONxF5D+/tvgkPfDAfF77zy2AH1= vJz Q1fOU8lYFpZXTXIHb+559UqvIB8AdgR3SAJGHHt4RKA0F7f5ipYBBrC6cyXJyyoprT10EMvU8= VGi wXvTyJz3fjoYsdFzpWPlJEBRMedCot60g5dmbdrZ5DWClAr0yau47zpWj3enf1tLWaqcsuylW= svi uGjKGw7KHQd3bxALOknAp4dN3QwBYCKuZ7AddY9yjynVaD5X7nF9nO5BjR/i1DG86lem3iBDX= zXs ZDn8R38=3D =3D2wuH -----END PGP PUBLIC KEY BLOCK----- --------------A5D1C8DF2512E6DE871117B5-- --3ieqkwsXAUlMLWqSzM3vZ4wqjZxzr95KD-- --43B1P5PSPfewMbPCclw4YdyC2HZcr0FaY Content-Type: application/pgp-signature; name="OpenPGP_signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="OpenPGP_signature" -----BEGIN PGP SIGNATURE----- wsB5BAABCAAjFiEEhRJncuj2BJSl0Jf3sN6d1ii/Ey8FAmEeIE8FAwAAAAAACgkQsN6d1ii/Ey86 ewf8DDj1mcZyLcKS6+OjD323aoI9KAaKe64Zh5nZ8zSP0lozgAYl6MVECuSHrcIzkD+nIB1etcUN 4gcQCcpkYjarg7oewbFuVpyYtBJiVVEQEJLGY3qDPNBdAbFHrrYZzH3NPY+suXzcNfzoe3KrJ47b MhvA8U9Aca9GIhYlVyCzk21l0MEgPhFPvVJe0oQykZ9KQfQNBUNS5XCUoVJJwzFkyG58dE6mN5fm YG7Tswg/ylmrP1ju+rvsll4vXXk5VkvfXaOBQO1sCyO7MXz1Ws1fL966p7PSWxVw+OW5CJLjQknw f1oCn4S7EhCcCmOa69BVwUe+uBwi5MpOhxvUhVIlUw== =LrMv -----END PGP SIGNATURE----- --43B1P5PSPfewMbPCclw4YdyC2HZcr0FaY--