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d="scan'208";a="56964556" Date: Thu, 2 Jul 2020 18:21:52 +0000 From: Anchal Agarwal To: , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH v2 03/11] x86/xen: Introduce new function to map HYPERVISOR_shared_info on Resume Message-ID: <3601db44e7c543016ca67327393d9ae37019e408.1593665947.git.anchalag@amazon.com> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Precedence: Bulk X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.29 List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: pass (identity @amazon.com) Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce a small function which re-uses shared page's PA allocated during guest initialization time in reserve_shared_info() and not allocate new page during resume flow. It also does the mapping of shared_info_page by calling xen_hvm_init_shared_info() to use the function. Changelog: v1->v2: Remove extra check for shared_info_pfn to be NULL Signed-off-by: Anchal Agarwal --- arch/x86/xen/enlighten_hvm.c | 6 ++++++ arch/x86/xen/xen-ops.h | 1 + 2 files changed, 7 insertions(+) diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c index 3e89b0067ff0..d91099928746 100644 --- a/arch/x86/xen/enlighten_hvm.c +++ b/arch/x86/xen/enlighten_hvm.c @@ -28,6 +28,12 @@ =20 static unsigned long shared_info_pfn; =20 +void xen_hvm_map_shared_info(void) +{ + xen_hvm_init_shared_info(); + HYPERVISOR_shared_info =3D __va(PFN_PHYS(shared_info_pfn)); +} + void xen_hvm_init_shared_info(void) { struct xen_add_to_physmap xatp; diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h index 53b224fd6177..41e9e9120f2d 100644 --- a/arch/x86/xen/xen-ops.h +++ b/arch/x86/xen/xen-ops.h @@ -54,6 +54,7 @@ void xen_enable_sysenter(void); void xen_enable_syscall(void); void xen_vcpu_restore(void); =20 +void xen_hvm_map_shared_info(void); void xen_hvm_init_shared_info(void); void xen_unplug_emulated_devices(void); =20 --=20 2.20.1