This part deals with the guest side. This is a common interface for communicating with the host using the standard TMEM API.
Signed-off-by: Sasha Levin <[email protected]> --- arch/x86/kvm/tmem/Kconfig | 3 + arch/x86/kvm/tmem/Makefile | 1 + arch/x86/kvm/tmem/guest.c | 95 ++++++++++++++++++++++++++++++++++++++++++++ arch/x86/kvm/tmem/guest.h | 11 +++++ 4 files changed, 110 insertions(+), 0 deletions(-) create mode 100644 arch/x86/kvm/tmem/guest.c create mode 100644 arch/x86/kvm/tmem/guest.h diff --git a/arch/x86/kvm/tmem/Kconfig b/arch/x86/kvm/tmem/Kconfig index 1a59e4f..85ec25b 100644 --- a/arch/x86/kvm/tmem/Kconfig +++ b/arch/x86/kvm/tmem/Kconfig @@ -19,4 +19,7 @@ config KVM_TMEM_HOST With this option on, the KVM host will be able to process KVM TMEM requests coming from guests. +config KVM_TMEM_GUEST + bool + endif # KVM_TMEM diff --git a/arch/x86/kvm/tmem/Makefile b/arch/x86/kvm/tmem/Makefile index 706cd36..1b15e20 100644 --- a/arch/x86/kvm/tmem/Makefile +++ b/arch/x86/kvm/tmem/Makefile @@ -1,3 +1,4 @@ ccflags-y += -Idrivers/staging/zcache/ obj-$(CONFIG_KVM_TMEM_HOST) += host.o +obj-$(CONFIG_KVM_TMEM_GUEST) += guest.o diff --git a/arch/x86/kvm/tmem/guest.c b/arch/x86/kvm/tmem/guest.c new file mode 100644 index 0000000..465cc86 --- /dev/null +++ b/arch/x86/kvm/tmem/guest.c @@ -0,0 +1,95 @@ +/* + * KVM TMEM guest side interface + * + * Copyright (c) 2012 Sasha Levin + * + */ + +#include <linux/kvm_para.h> +#include <linux/kvm_types.h> +#include <asm/io.h> + +#include "tmem.h" +#include "guest.h" + +#include <zcache.h> + +int kvm_tmem_new_pool(__u16 cli_id, __u32 flags, unsigned long pagesize) +{ + struct tmem_kvm_op op = {0}; + + flags |= ((ilog2(pagesize) - PAGE_SHIFT) << TMEM_POOL_PAGESIZE_SHIFT) | + (TMEM_SPEC_VERSION << TMEM_VERSION_SHIFT); + + op = (struct tmem_kvm_op) { + .cmd = TMEM_NEW_POOL, + .cli_id = cli_id, + .u.new.flags = flags, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} + +int kvm_tmem_put_page(__u32 pool_id, struct tmem_oid oid, __u32 index, unsigned long gfn) +{ + struct tmem_kvm_op op = { + .cmd = TMEM_PUT_PAGE, + .cli_id = KVM_CLIENT, + .pool_id = pool_id, + .u.gen.oid = oid, + .u.gen.index = index, + .u.gen.gfn = gfn, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} + +int kvm_tmem_get_page(__u32 pool_id, struct tmem_oid oid, __u32 index, unsigned long gfn) +{ + struct tmem_kvm_op op = { + .cmd = TMEM_GET_PAGE, + .cli_id = KVM_CLIENT, + .pool_id = pool_id, + .u.gen.oid = oid, + .u.gen.index = index, + .u.gen.gfn = gfn, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} + +int kvm_tmem_flush_page(__u32 pool_id, struct tmem_oid oid, __u32 index) +{ + struct tmem_kvm_op op = { + .cmd = TMEM_FLUSH_PAGE, + .cli_id = KVM_CLIENT, + .pool_id = pool_id, + .u.gen.oid = oid, + .u.gen.index = index, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} + +int kvm_tmem_flush_object(__u32 pool_id, struct tmem_oid oid) +{ + struct tmem_kvm_op op = { + .cmd = TMEM_FLUSH_OBJECT, + .cli_id = KVM_CLIENT, + .pool_id = pool_id, + .u.gen.oid = oid, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} + +int kvm_tmem_destroy_pool(__u32 pool_id) +{ + struct tmem_kvm_op op = { + .cmd = TMEM_DESTROY_POOL, + .cli_id = KVM_CLIENT, + .pool_id = pool_id, + }; + + return kvm_hypercall2(KVM_HC_TMEM, virt_to_phys(&op), 0); +} diff --git a/arch/x86/kvm/tmem/guest.h b/arch/x86/kvm/tmem/guest.h new file mode 100644 index 0000000..9225451 --- /dev/null +++ b/arch/x86/kvm/tmem/guest.h @@ -0,0 +1,11 @@ +#ifndef _KVM_TMEM_GUEST_H +#define _KVM_TMEM_GUEST_H + +extern int kvm_tmem_new_pool(uint16_t cli_id, __u32 flags, unsigned long pagesize); +extern int kvm_tmem_put_page(__u32 pool_id, struct tmem_oid oid, __u32 index, unsigned long gfn); +extern int kvm_tmem_get_page(u32 pool_id, struct tmem_oid oid, __u32 index, unsigned long gfn); +extern int kvm_tmem_flush_page(__u32 pool_id, struct tmem_oid oid, __u32 index); +extern int kvm_tmem_flush_object(__u32 pool_id, struct tmem_oid oid); +extern int kvm_tmem_destroy_pool(__u32 pool_id); + +#endif -- 1.7.8.6 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
