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[Xen-devel] [PATCH v3 01/21] x86/mm: carve out create_grant_pv_mapping

To: Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>

Date: Thu, 20 Jul 2017 17:04:06 +0100

Cc: George Dunlap <george.dunlap@xxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wei.liu2@xxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxx>

Delivery-date: Thu, 20 Jul 2017 16:04:42 +0000

List-id: Xen developer discussion <xen-devel.lists.xen.org>

And at once make create_grant_host_mapping an inline function. This requires making create_grant_{hvm,pv}_mapping non-static. Provide {hvm,pv}/grant_table.h. Include the headers where necessary. The two functions create_grant_{hvm,pv}_mapping will be moved later in a dedicated patch with all their helpers. Signed-off-by: Wei Liu <wei.liu2@xxxxxxxxxx> --- xen/arch/x86/mm.c | 16 +++++------ xen/include/asm-x86/grant_table.h | 16 +++++++++-- xen/include/asm-x86/hvm/grant_table.h | 53 +++++++++++++++++++++++++++++++++++ xen/include/asm-x86/pv/grant_table.h | 52 ++++++++++++++++++++++++++++++++++ 4 files changed, 127 insertions(+), 10 deletions(-) create mode 100644 xen/include/asm-x86/hvm/grant_table.h create mode 100644 xen/include/asm-x86/pv/grant_table.h diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c index 19f672d880..532b1ee7e7 100644 --- a/xen/arch/x86/mm.c +++ b/xen/arch/x86/mm.c @@ -123,6 +123,9 @@ #include <asm/io_apic.h> #include <asm/pci.h> +#include <asm/hvm/grant_table.h> +#include <asm/pv/grant_table.h> + /* Mapping of the fixmap space needed early. */ l1_pgentry_t __section(".bss.page_aligned") __aligned(PAGE_SIZE) l1_fixmap[L1_PAGETABLE_ENTRIES]; @@ -4242,9 +4245,9 @@ static int destroy_grant_va_mapping( return replace_grant_va_mapping(addr, frame, l1e_empty(), v); } -static int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, - unsigned int flags, - unsigned int cache_flags) +int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, + unsigned int cache_flags) { p2m_type_t p2mt; int rc; @@ -4265,15 +4268,12 @@ static int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, return GNTST_okay; } -int create_grant_host_mapping(uint64_t addr, unsigned long frame, - unsigned int flags, unsigned int cache_flags) +int create_grant_pv_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, unsigned int cache_flags) { l1_pgentry_t pte; uint32_t grant_pte_flags; - if ( paging_mode_external(current->domain) ) - return create_grant_p2m_mapping(addr, frame, flags, cache_flags); - grant_pte_flags = _PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_GNTTAB; if ( cpu_has_nx ) diff --git a/xen/include/asm-x86/grant_table.h b/xen/include/asm-x86/grant_table.h index 32d0a864b6..4aa22126d3 100644 --- a/xen/include/asm-x86/grant_table.h +++ b/xen/include/asm-x86/grant_table.h @@ -7,14 +7,26 @@ #ifndef __ASM_GRANT_TABLE_H__ #define __ASM_GRANT_TABLE_H__ +#include <asm/paging.h> + +#include <asm/hvm/grant_table.h> +#include <asm/pv/grant_table.h> + #define INITIAL_NR_GRANT_FRAMES 4 /* * Caller must own caller's BIGLOCK, is responsible for flushing the TLB, and * must hold a reference to the page. */ -int create_grant_host_mapping(uint64_t addr, unsigned long frame, - unsigned int flags, unsigned int cache_flags); +static inline int create_grant_host_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, + unsigned int cache_flags) +{ + if ( paging_mode_external(current->domain) ) + return create_grant_p2m_mapping(addr, frame, flags, cache_flags); + return create_grant_pv_mapping(addr, frame, flags, cache_flags); +} + int replace_grant_host_mapping( uint64_t addr, unsigned long frame, uint64_t new_addr, unsigned int flags); diff --git a/xen/include/asm-x86/hvm/grant_table.h b/xen/include/asm-x86/hvm/grant_table.h new file mode 100644 index 0000000000..83202c219c --- /dev/null +++ b/xen/include/asm-x86/hvm/grant_table.h @@ -0,0 +1,53 @@ +/* + * asm-x86/hvm/grant_table.h + * + * Grant table interfaces for HVM guests + * + * Copyright (C) 2017 Wei Liu <wei.liu2@xxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms and conditions of the GNU General Public + * License, version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __X86_HVM_GRANT_TABLE_H__ +#define __X86_HVM_GRANT_TABLE_H__ + +#ifdef CONFIG_HVM + +int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, + unsigned int cache_flags); + +#else + +#include <public/grant_table.h> + +static inline int create_grant_p2m_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, + unsigned int cache_flags) +{ + return GNTST_general_error; +} + +#endif + +#endif /* __X86_HVM_GRANT_TABLE_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/include/asm-x86/pv/grant_table.h b/xen/include/asm-x86/pv/grant_table.h new file mode 100644 index 0000000000..165ebce22f --- /dev/null +++ b/xen/include/asm-x86/pv/grant_table.h @@ -0,0 +1,52 @@ +/* + * asm-x86/pv/grant_table.h + * + * Grant table interfaces for PV guests + * + * Copyright (C) 2017 Wei Liu <wei.liu2@xxxxxxxxxx> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms and conditions of the GNU General Public + * License, version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; If not, see <http://www.gnu.org/licenses/>. + */ + +#ifndef __X86_PV_GRANT_TABLE_H__ +#define __X86_PV_GRANT_TABLE_H__ + +#ifdef CONFIG_PV + +int create_grant_pv_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, unsigned int cache_flags); + +#else + +#include <public/grant_table.h> + +static inline int create_grant_pv_mapping(uint64_t addr, unsigned long frame, + unsigned int flags, + unsigned int cache_flags) +{ + return GNTST_general_error; +} + +#endif + +#endif /* __X86_PV_GRANT_TABLE_H__ */ + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * tab-width: 4 + * indent-tabs-mode: nil + * End: + */ -- 2.11.0 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel

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