From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tiejun Chen Subject: [v8][PATCH 07/17] hvmloader/util: get reserved device memory maps Date: Mon, 1 Dec 2014 17:24:25 +0800 Message-ID: <1417425875-9634-8-git-send-email-tiejun.chen@intel.com> References: <1417425875-9634-1-git-send-email-tiejun.chen@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1417425875-9634-1-git-send-email-tiejun.chen@intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: jbeulich@suse.com, ian.jackson@eu.citrix.com, stefano.stabellini@eu.citrix.com, ian.campbell@citrix.com, wei.liu2@citrix.com, kevin.tian@intel.com, tim@xen.org, yang.z.zhang@intel.com Cc: xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org We need to use reserved device memory maps with multiple times, so provide just one common function should be friend. Signed-off-by: Tiejun Chen --- tools/firmware/hvmloader/util.c | 59 +++++++++++++++++++++++++++++++++++++++++ tools/firmware/hvmloader/util.h | 2 ++ 2 files changed, 61 insertions(+) diff --git a/tools/firmware/hvmloader/util.c b/tools/firmware/hvmloader/util.c index 80d822f..dd81fb6 100644 --- a/tools/firmware/hvmloader/util.c +++ b/tools/firmware/hvmloader/util.c @@ -22,11 +22,14 @@ #include "config.h" #include "hypercall.h" #include "ctype.h" +#include "errno.h" #include #include #include #include +struct xen_reserved_device_memory *rdm_map; + void wrmsr(uint32_t idx, uint64_t v) { asm volatile ( @@ -828,6 +831,62 @@ int hpet_exists(unsigned long hpet_base) return ((hpet_id >> 16) == 0x8086); } +static int +get_reserved_device_memory_map(struct xen_reserved_device_memory entries[], + uint32_t *max_entries) +{ + int rc; + struct xen_reserved_device_memory_map xrdmmap = { + .domid = DOMID_SELF, + .nr_entries = *max_entries + }; + + set_xen_guest_handle(xrdmmap.buffer, entries); + + rc = hypercall_memory_op(XENMEM_reserved_device_memory_map, &xrdmmap); + *max_entries = xrdmmap.nr_entries; + + return rc; +} + +/* + * Getting all reserved device memory map info in case of hvmloader. + * We just return zero for any failed cases, and this means we + * can't further handle any reserved device memory. + */ +unsigned int hvm_get_reserved_device_memory_map(void) +{ + static unsigned int nr_entries = 0; + int rc = get_reserved_device_memory_map(rdm_map, &nr_entries); + + if ( rc == -ENOBUFS ) + { + rdm_map = mem_alloc(nr_entries*sizeof(struct xen_reserved_device_memory), + 0); + if ( rdm_map ) + { + rc = get_reserved_device_memory_map(rdm_map, &nr_entries); + if ( rc ) + { + printf("Could not get reserved dev memory info on domain"); + return 0; + } + } + else + { + printf("No space to get reserved dev memory maps!\n"); + return 0; + } + } + else if ( rc ) + { + printf("Could not get reserved dev memory info on domain"); + return 0; + } + + return nr_entries; +} + /* * Local variables: * mode: C diff --git a/tools/firmware/hvmloader/util.h b/tools/firmware/hvmloader/util.h index a70e4aa..e4f1851 100644 --- a/tools/firmware/hvmloader/util.h +++ b/tools/firmware/hvmloader/util.h @@ -241,6 +241,8 @@ int build_e820_table(struct e820entry *e820, unsigned int bios_image_base); void dump_e820_table(struct e820entry *e820, unsigned int nr); +unsigned int hvm_get_reserved_device_memory_map(void); + #ifndef NDEBUG void perform_tests(void); #else -- 1.9.1